U.S. patent application number 11/037304 was filed with the patent office on 2006-02-23 for electricity generating and air conditioning system.
This patent application is currently assigned to LG Electronics Inc.. Invention is credited to Chang Min Choi, Won Jae Choi, Yoon Jei Hwang, Seung Tak Kang, Hyung Soo Lim.
Application Number | 20060037347 11/037304 |
Document ID | / |
Family ID | 36080343 |
Filed Date | 2006-02-23 |
United States Patent
Application |
20060037347 |
Kind Code |
A1 |
Kang; Seung Tak ; et
al. |
February 23, 2006 |
Electricity generating and air conditioning system
Abstract
An electricity generating and air conditioning system including
a first generator coupled to the output shaft of the engine to
generate electricity, a turbo charger to be operated by exhaust gas
discharged from the engine, and thus, to enhance the power of the
engine, and a second generator coupled to the turbo charger to
generate electricity, so that it is possible to achieve an
enhancement in energy efficiency.
Inventors: |
Kang; Seung Tak; (Seoul,
KR) ; Choi; Chang Min; (Seoul-si, KR) ; Choi;
Won Jae; (Seoul, KR) ; Lim; Hyung Soo; (Seoul,
KR) ; Hwang; Yoon Jei; (Seoul, KR) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
LG Electronics Inc.
Seoul
KR
150-010
|
Family ID: |
36080343 |
Appl. No.: |
11/037304 |
Filed: |
January 19, 2005 |
Current U.S.
Class: |
62/323.3 ;
62/238.6 |
Current CPC
Class: |
F25B 2400/06 20130101;
F25D 21/04 20130101; Y02A 30/274 20180101; F25B 2500/02 20130101;
F25B 13/00 20130101; F25B 27/02 20130101 |
Class at
Publication: |
062/323.3 ;
062/238.6 |
International
Class: |
F25B 27/00 20060101
F25B027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 17, 2004 |
KR |
2004-64814 |
Claims
1. An electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; a turbo charger
including a turbine to be rotated by exhaust gas discharged from
the engine; a second generator connected to the turbine to generate
electricity; and an air conditioner, which uses the electricity
generated from at least one of the first and second generators and
includes a compressor, an indoor heat exchanger, an expansion
device, and an outer heat exchanger.
2. The electricity generating and air conditioning system according
claim 1, further comprising: exhaust gas waste heat recovering
means to recover heat of the exhaust gas discharged from the engine
and to heat a refrigerant passing through a discharge line of the
compressor, using the recovered heat.
3. The electricity generating and air conditioning system according
to claim 1, further comprising: cooling water waste heat recovering
means to recover heat of cooling water used to cool the engine and
to pre-heat air blown to the outdoor heat exchanger, using the
recovered heat.
4. The electricity generating and air conditioning system according
to claim 1, further comprising: a heater to heat a refrigerant
passing through a suction line of the compressor or a discharge
line of the compressor, using the electricity generated from at
least one of the first and second generators
5. The electricity generating and air conditioning system according
to claim 1, further comprising: exhaust gas waste heat recovering
means to recover heat of the exhaust gas discharged from the engine
and to heat the refrigerant passing through a discharge line of the
compressor, using the recovered exhaust gas heat; cooling water
waste heat recovering means to recover heat of cooling water used
to cool the engine and to pre-heat air blown to the outdoor heat
exchanger, using the recovered cooling water heat; and a heater to
heat a refrigerant passing through a suction line of the compressor
or the discharge line of the compressor, using the electricity
generated from at least one of the first and second generators.
6. The electricity generating and air conditioning system according
to claim 1, wherein the air conditioner is a heat pump type air
conditioner.
7. The electricity generating and air conditioning system according
to claim 1, wherein at least one of the engine, the first
generator, the second generator, the outdoor heat exchanger, and
the indoor heat exchanger comprises a plurality of ones.
8. An electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; a turbo charger
including a turbine to be rotated by exhaust gas discharged from
the engine; an electricity-generating turbine to be rotated by the
exhaust gas emerging from the turbo charger; a second generator
connected to the electricity-generating turbine to generate
electricity; and an air conditioner, which uses the electricity
generated from at least one of the first and second generators and
includes a compressor, an indoor heat exchanger, an expansion
device, and an outer heat exchanger.
9. The electricity generating and air conditioning system according
claim 8, further comprising: exhaust gas waste heat recovering
means to recover heat of the exhaust gas discharged from the engine
and to heat a refrigerant passing through a discharge line of the
compressor, using the recovered heat.
10. The electricity generating and air conditioning system
according to claim 8, further comprising: cooling water waste heat
recovering means to recover heat of cooling water used to cool the
engine and to pre-heat air blown to the outdoor heat exchanger,
using the recovered heat.
11. The electricity generating and air conditioning system
according to claim 8, further comprising: a heater to heat a
refrigerant passing through a suction line of the compressor or a
discharge line of the compressor, using the electricity generated
from at least one of the first and second generators
12. The electricity generating and air conditioning system
according to claim 8, further comprising: exhaust gas waste heat
recovering means to recover heat of the exhaust gas discharged from
the engine and to heat the refrigerant passing through a discharge
line of the compressor, using the recovered exhaust gas heat;
cooling water waste heat recovering means to recover heat of
cooling water used to cool the engine and to pre-heat air blown to
the outdoor heat exchanger, using the recovered cooling water heat;
and a heater to heat a refrigerant passing through a suction line
of the compressor or the discharge line of the compressor, using
the electricity generated from at least one of the first and second
generators.
13. The electricity generating and air conditioning system
according to claim 8, wherein the air conditioner is a heat pump
type air conditioner.
14. The electricity generating and air conditioning system
according to claim 8, wherein at least one of the engine, the first
generator, the second generator, the outdoor heat exchanger, and
the indoor heat exchanger comprises a plurality of ones.
15. An electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; an
electricity-generating turbine to be rotated by exhaust gas
discharged from the engine; a second generator connected to the
electricity-generating turbine to generate electricity; and an air
conditioner, which uses the electricity generated from at least one
of the first and second generators and includes a compressor, an
indoor heat exchanger, an expansion device, and an outer heat
exchanger.
16. The electricity generating and air conditioning system
according claim 15, further comprising: exhaust gas waste heat
recovering means to recover heat of the exhaust gas discharged from
the engine and to heat a refrigerant passing through a discharge
line of the compressor, using the recovered heat.
17. The electricity generating and air conditioning system
according to claim 15, further comprising: cooling water waste heat
recovering means to recover heat of cooling water used to cool the
engine and to pre-heat air blown to the outdoor heat exchanger,
using the recovered heat.
18. The electricity generating and air conditioning system
according to claim 15, further comprising: a heater to heat a
refrigerant passing through a suction line of the compressor or a
discharge line of the compressor, using the electricity generated
from at least one of the first and second generators
19. The electricity generating and air conditioning system
according to claim 15, further comprising: exhaust gas waste heat
recovering means to recover heat of the exhaust gas discharged from
the engine and to heat the refrigerant passing through a discharge
line of the compressor, using the recovered exhaust gas heat;
cooling water waste heat recovering means to recover heat of
cooling water used to cool the engine and to pre-heat air blown to
the outdoor heat exchanger, using the recovered cooling water heat;
and a heater to heat a refrigerant passing through a suction line
of the compressor or the discharge line of the compressor, using
the electricity generated from at least one of the first and second
generators.
20. The electricity generating and air conditioning system
according to claim 15, wherein the air conditioner is a heat pump
type air conditioner.
21. The electricity generating and air conditioning system
according to claim 15, wherein at least one of the engine, the
first generator, the second generator, the outdoor heat exchanger,
and the indoor heat exchanger comprises a plurality of ones.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to an electricity generating
and air conditioning system which generates electricity, using an
engine, and uses the electricity in an air conditioner, and, more
particularly, to an electricity generating and air conditioning
system in which exhaust gas generated during an electricity
generating operation of an engine is used to again generate
electricity.
[0003] 2. Description of the Related Art
[0004] In general, electricity generating and air conditioning
systems generate electricity by use of a rotating force outputted
from an engine, and operate an air conditioner by use of the
generated electricity. Such electricity generating and air
conditioning systems are mainly used for multi-type air
conditioners or large-scale air conditioners.
[0005] Such electricity generating and air conditioning systems
include an engine, a generator connected to an output shaft of the
engine to generate electricity, and an air conditioner, which is
operated, using the electricity generated from the generator.
[0006] However, such a conventional electricity generating and air
conditioning system has a problem in that exhaust gas generated
during an electricity generating operation of an engine is
discharged to the atmosphere without being again used for
generation of electricity, so that the system exhibits a low energy
efficiency.
SUMMARY OF THE INVENTION
[0007] The present invention has been made in view of the
above-mentioned problems, and it is an object of the invention to
provide an electricity generating and air conditioning system
wherein a turbo charger is mounted to an engine, to improve the
power of the engine, and exhaust gas generated during an
electricity generating operation of the engine is used to again
generate electricity, so that the system exhibits an enhanced
energy efficiency.
[0008] In accordance with one aspect, the present invention
provides an electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; a turbo charger
including a turbine to be rotated by exhaust gas discharged from
the engine; a second generator connected to the turbine to generate
electricity; and an air conditioner, which uses the electricity
generated from at least one of the first and second generators and
includes a compressor, an indoor heat exchanger, an expansion
device, and an outer heat exchanger.
[0009] In accordance with another aspect, the present invention
provides an electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; a turbo charger
including a turbine to be rotated by exhaust gas discharged from
the engine; an electricity-generating turbine to be rotated by the
exhaust gas emerging from the turbo charger; a second generator
connected to the electricity-generating turbine to generate
electricity; and an air conditioner, which uses the electricity
generated from at least one of the first and second generators and
includes a compressor, an indoor heat exchanger, an expansion
device, and an outer heat exchanger.
[0010] In accordance with another aspect, the present invention
provides an electricity generating and air conditioning system
comprising: an engine; a first generator connected to an output
shaft of the engine to generate electricity; an
electricity-generating turbine to be rotated by exhaust gas
discharged from the engine; a second generator connected to the
electricity-generating turbine to generate electricity; and an air
conditioner, which uses the electricity generated from at least one
of the first and second generators and includes a compressor, an
indoor heat exchanger, an expansion device, and an outer heat
exchanger.
[0011] The electricity generating and air conditioning system may
further comprise a heater to heat a refrigerant passing through a
suction line of the compressor or a discharge line of the
compressor, using the electricity generated from at least one of
the first and second generators.
[0012] The electricity generating and air conditioning system may
further comprise exhaust gas waste heat recovering means to recover
heat of the exhaust gas discharged from the engine and to heat a
refrigerant passing through a discharge line of the compressor,
using the recovered heat.
[0013] The electricity generating and air conditioning system may
further comprise cooling water waste heat recovering means to
recover heat of cooling water used to cool the engine and to
pre-heat air blown to the outdoor heat exchanger, using the
recovered heat.
[0014] The air conditioner may be a heat pump type air
conditioner.
[0015] At least one of the engine, the first generator, the second
generator, the outdoor heat exchanger, and the indoor heat
exchanger may comprise a plurality of ones.
[0016] The electricity generating and air conditioning system
according to the present invention has an advantage in that the
first generator coupled to the output shaft of the engine generates
electricity, the turbo charger is operated by exhaust gas
discharged from the engine, to enhance the power of the engine, and
the second generator coupled to the turbo charger generates
electricity, so that it is possible to achieve an enhancement in
energy efficiency.
[0017] In the electricity generating and air conditioning system
according to the present invention, the first generator coupled to
the output shaft of the engine generates electricity. The turbo
charger is operated by exhaust gas discharged from the engine, to
enhance the power of the engine. Also, the exhaust gas used to
operate the turbo charger also may rotate the
electricity-generating turbine, so that the second generator
coupled to the electricity-generating turbine generates
electricity. Accordingly, it is possible to minimize the load of
the turbo charger and to achieve an enhancement in energy
efficiency.
[0018] The electricity generating and air conditioning system
according to the present invention also has an advantage in that
heat of the exhaust gas discharged from the engine is recovered,
and is supplied to the discharge line of the compressor, to heat a
refrigerant passing through the compressor discharge line, so that
an improvement in the heating performance of the indoor heat
exchanger is achieved.
[0019] The electricity generating and air conditioning system
according to the present invention also has an advantage in that
heat of cooling water used to cool the engine is recovered to
pre-heat air blown to the outdoor heat exchanger, so that it is
possible to prevent the outdoor heat exchanger from being frosted,
and to achieve an enhancement in heating performance.
[0020] The electricity generating and air conditioning system
according to the present invention includes a heater to pre-heat a
refrigerant passing through the suction line of the compressor,
using the electricity generated from at least one of the first and
second generators, so that it is possible to enhance the heating
performance of the indoor heat exchanger or to reduce the power
consumption of the compressor in accordance with the pre-heating
operation of the pre-heater.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The above objects, and other features and advantages of the
present invention will become more apparent after reading the
following detailed description when taken in conjunction with the
drawings, in which:
[0022] FIG. 1 is a schematic diagram of an electricity generating
and air conditioning system according to a first embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0023] FIG. 2 is a schematic diagram of the electricity generating
and air conditioning system according to the first embodiment of
the present invention, illustrating a state in which the system
operates in a cooling mode;
[0024] FIG. 3 is a schematic diagram of an electricity generating
and air conditioning system according to a second embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0025] FIG. 4 is a schematic diagram of the electricity generating
and air conditioning system according to the second embodiment of
the present invention, illustrating a state in which the system
operates in a cooling mode;
[0026] FIG. 5 is a schematic diagram of an electricity generating
and air conditioning system according to a third embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0027] FIG. 6 is a schematic diagram of the electricity generating
and air conditioning system according to the third embodiment of
the present invention, illustrating a state in which the system
operates in a cooling mode;
[0028] FIG. 7 is a schematic diagram of an electricity generating
and air conditioning system according to a fourth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0029] FIG. 8 is a schematic diagram of the electricity generating
and air conditioning system according to the fourth embodiment of
the present invention, illustrating a state in which the system
operates in a cooling mode;
[0030] FIG. 9 is a schematic diagram of an electricity generating
and air conditioning system according to a fifth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0031] FIG. 10 is a schematic diagram of an electricity generating
and air conditioning system according to a sixth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0032] FIG. 11 is a schematic diagram of an electricity generating
and air conditioning system according to a seventh embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode;
[0033] FIG. 12 is a schematic diagram of an electricity generating
and air conditioning system according to an eighth embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode;
[0034] FIG. 13 is a schematic diagram of an electricity generating
and air conditioning system according to a ninth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode;
[0035] FIG. 14 is a schematic diagram of an electricity generating
and air conditioning system according to a tenth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode; and
[0036] FIG. 15 is a schematic diagram of an electricity generating
and air conditioning system according to an eleventh embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0037] Hereinafter, exemplary embodiments of an electricity
generating and air conditioning system according to the present
invention will be described with reference to the annexed
drawings.
[0038] FIG. 1 is a schematic diagram of an electricity generating
and air conditioning system according to a first embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode. FIG. 2 is a schematic diagram of the
electricity generating and air conditioning system according to the
first embodiment of the present invention, illustrating a state in
which the system operates in a cooling mode.
[0039] As shown in FIGS. 1 and 2, the electricity generating and
air conditioning system includes an engine 2, a first generator 10
connected to an output shaft of the engine 2 to generate
electricity, a turbo charger 20, which includes a turbine 22 to be
rotated by exhaust gas discharged from the engine 2, a second
generator 30 connected to the turbine 22 to generate electricity,
and an air conditioner 40, which uses the electricity generated
from at least one of the first and second generators 10 and 30.
[0040] The engine 2 includes a combustion chamber defined in the
interior of the engine 2.
[0041] A fuel tube 3 and an exhaust tube 4 are connected to the
engine 2. The fuel tube 3 is adapted to supply fuel such as
liquefied gas or liquefied petroleum gas into the combustion
chamber. The exhaust tube 4 is adapted to guide exhaust gas
discharged from the combustion chamber.
[0042] The first generator 10 may be an AC generator or a DC
generator.
[0043] The turbine 22 is connected to the exhaust tube 4 such that
the turbine 22 is rotated by the exhaust gas passing through the
exhaust tube 4. In addition to the turbine 22, the turbo charger 20
includes a compressor 24 coupled to the turbine 22 to supply
outdoor air O into the fuel tube 3.
[0044] The second generator 30 may be an AC generator or a DC
generator. The second generator 30 has a rotating shaft 32 coupled
to the turbine 22.
[0045] The air conditioner 40 may be an air conditioner used only
for heating purposes, which includes a compressor 41, an inner heat
exchanger 42, an expansion device 43, and an outdoor heat exchanger
44. Alternatively, the air conditioner 40 may be a heat pump type
air conditioner, which includes a directional valve 45 in addition
to the configuration including the compressor 41, inner heat
exchanger 42, expansion device 43, and outdoor heat exchanger 44,
so that the air conditioner is switchable between a heating mode
and a cooling mode. The following description will be given only in
conjunction with the case in which the air conditioner 40 is a heat
pump type air conditioner.
[0046] In a heating operation of the heat pump type air conditioner
40, refrigerant, which has been compressed in the compressor 41,
flows through the directional valve 45, indoor heat exchanger 42,
expansion device 43, outdoor heat exchanger 44, and directional
valve 45, in this order, and then enters the compressor 41, as
shown in FIG. 1. Thus, the refrigerant is circulated. In this
operation, the outdoor heat exchanger 44 functions as an
evaporator, whereas the indoor heat exchanger 42 functions as a
condenser, and thus, discharges heat to indoor air.
[0047] On the other hand, in a cooling operation of the heat pump
type air conditioner 40, refrigerant, which has been compressed in
the compressor 41, flows through the directional valve 45, outdoor
heat exchanger 44, expansion device 43, indoor heat exchanger 42,
and directional valve 45, in this order, and then enters the
compressor 41, as shown in FIG. 2. Thus, the refrigerant is
circulated. In this operation, the outdoor heat exchanger 44
functions as a condenser, whereas the indoor heat exchanger 42
functions as an evaporator, and thus, absorbs heat from indoor
air.
[0048] The electricity generating and air conditioning system
according to this embodiment further includes a heater 48 to
pre-heat a refrigerant passing through a suction line 41a of the
compressor 41, using the electricity generated from at least one of
the first and second generators 10 and 30.
[0049] In accordance with one method, the electricity generated
from the first generator 10 and the electricity generated from the
second generator 30 may be collected so that the collected
electricity may be distributed to the compressor 41 and heater
48.
[0050] In accordance with another method, the electricity generated
from one of the first and second generators 10 and 30, for example,
the first generator 10, may be used to drive the compressor 41, and
the electricity generated from the other generator, for example,
the second generator 30, may be used to operate the heater 48.
[0051] In accordance with another method, the electricity generated
from one of the first and second generators 10 and 30, for example,
the first generator 10, may be used to drive the compressor 41, and
the electricity generated from the other generator, for example,
the second generator 30, may be used to operate a selected one of
the compressor 41 and heater 48 in accordance with whether the heat
pump type air conditioner 20 operates in a cooling mode or in a
heating mode.
[0052] For the electricity distribution according to the third
method, the electricity feed line of the other one of the first and
second generators 10 and 30, for example, the electricity feed line
of the second generator 30, is selectively connected to the
compressor 41 and heater 48 via an electricity supply switch S. In
this case, the electricity generated from the second generator 30
is supplied to the heater 48 via the electricity supply switch S in
a heating operation of the heat pump type air conditioner 20. On
the other hand, in a cooling operation of the heat pump type air
conditioner 20, the electricity from the second generator 30 is
supplied to the compressor 41 via the electricity supply switch
S.
[0053] For convenience of description, the following description
will be given only in conjunction with the case in which the
electricity generated from the other one of the first and second
generators 10 and 30, for example, the electricity feed line of the
second generator 30, is supplied to the heater 48 in the heating
operation of the heat pump type air conditioner 20, and is supplied
to the compressor 41 in the cooling operation of the heat pump type
air conditioner 20.
[0054] Reference numeral 46 designates an indoor fan to blow indoor
air I to the indoor heat exchanger 42, and reference numeral 47
designates an outdoor fan to blow outdoor air O to the outdoor heat
exchanger 44.
[0055] Hereinafter, operation of the electricity generating and air
conditioning system having the above-described arrangement will be
described.
[0056] When fuel is supplied into the engine 2 via the fuel tube 3,
and the engine 2 is subsequently driven, the output shaft of the
engine 2 is rotated, thereby causing the first generator 10 to
generate electricity.
[0057] Exhaust gas E discharged from the engine 2 rotates the
turbine 22 of the turbo charger 20 while passing through the
exhaust tube 4, and is then discharged to the atmosphere. The
turbine 22 of the turbo charger 20 drives the compressor 24, and
rotates the rotating shaft 32 of the second generator 30.
[0058] During the operation of the compressor 24, outdoor air O is
compressed, and is then sucked into a combustion chamber of the
engine 2. Thus, a sufficient amount of air is supplied into the
combustion chamber of the engine 2, so that the temperature of the
sucked air is lowered, thereby causing the fuel in the combustion
chamber to be completely combusted. Accordingly, it is possible to
achieve an enhancement in the power of the engine 2, and a
reduction in the amount of fumes contained in the exhaust gas
E.
[0059] The second generator 30 generates electricity in accordance
with the rotation of the rotating shaft 32.
[0060] In a heating operation of the heat pump type air conditioner
40, the directional valve 45 is switched to a heating mode, as
shown in FIG. 1. In this case, the compressor 41 and heater 48 are
driven, using the electricity generated from the first and second
generators 10 and 30.
[0061] The compressor 41 compresses low-temperature and
low-pressure refrigerant gas, thereby changing the refrigerant gas
into a high-temperature and high-pressure state. The compressed
high-temperature and high-pressure refrigerant gas releases heat
into the indoor heat exchanger 42 while passing through the indoor
heat exchanger 42 via the directional valve 45, so that the indoor
heat exchanger 42 releases the absorbed heat therearound, thereby
increasing indoor temperature.
[0062] Thus, the refrigerant performs heat exchange with indoor air
while passing through the indoor heat exchanger 42, so that the
refrigerant is condensed. The refrigerant is then introduced into
the suction line 41a of the compressor 41 after passing through the
expansion device 43, outdoor heat exchanger 44, and directional
valve 45, in this order.
[0063] The refrigerant introduced into the suction line 41a of the
compressor 41 is pre-heated by the heater 48, and is then
circulated through the compressor 41. Thus, the refrigerant is
repeatedly circulated.
[0064] Since the refrigerant is repeatedly pre-heated by the heater
48 prior to the repeated circulation, it is possible to enhance the
heating performance of the indoor heat exchanger 42 or to reduce
the power consumption of the compressor 41.
[0065] On the other hand, in a cooling operation of the air
conditioner 40, the directional valve 45 is switched to a cooling
mode. In this case, the compressor 41 is driven, using the
electricity generated from the first and second generators 10 and
30, whereas the heater 48 is stopped.
[0066] The compressor 41 compresses low-temperature and
low-pressure refrigerant gas, thereby changing the refrigerant gas
into a high-temperature and high-pressure state. As shown in FIG.
2, the compressed high-temperature and high-pressure refrigerant
gas passes through the outdoor heat exchanger 44 via the
directional valve 45, and then absorbs heat from indoor air while
passing through the indoor heat exchanger 42 via the expansion
device 43, so that the refrigerant is evaporated. Thereafter, the
refrigerant is circulated into the compressor via the directional
valve 45.
[0067] FIG. 3 is a schematic diagram of an electricity generating
and air conditioning system according to a second embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode. FIG. 4 is a schematic diagram of the
electricity generating and air conditioning system according to the
second embodiment of the present invention, illustrating a state in
which the system operates in a cooling mode.
[0068] As shown in FIGS. 3 and 4, the electricity generating and
air conditioning system includes an engine 2, a first generator 10
connected to an output shaft of the engine 2 to generate
electricity, a turbo charger 20, which includes a turbine 22 to be
rotated by exhaust gas discharged from the engine 2, an
electricity-generating turbine 28 to be rotated by the exhaust gas
emerging from the turbo charger 20, a second generator 30 connected
to the electricity-generating turbine 28 to generate electricity,
and an air conditioner 40, which uses the electricity generated
from at least one of the first and second generators 10 and 30.
[0069] The electricity-generating turbine 28 is arranged downstream
from the turbine 22 of the turbo charger 20 with respect to a
flowing direction of the exhaust gas so that the
electricity-generating turbine 28 is rotated by the exhaust gas
emerging from the turbine 22 of the turbo charger 20 after rotating
the turbine 22.
[0070] The second generator 30 has a rotating shaft 32 coupled to
the electricity-generating turbine 28.
[0071] When fuel is supplied into the engine 2 via a fuel tube 3,
and the engine 2 is subsequently driven in the electricity
generating and air conditioning system having the above-described
arrangement, the output shaft of the engine 2 is rotated, thereby
causing the first generator 10 to generate electricity.
[0072] Exhaust gas E discharged from the engine 2 rotates the
turbine 22 of the turbo charger 20 while passing through the
exhaust tube 4.
[0073] In accordance with the rotation of the turbine 22, the
compressor 24 is driven, so that outdoor air O is compressed by the
compressor 24, and is then supplied into a combustion chamber of
the engine 2.
[0074] The exhaust gas E, which emerges from the turbine 22 of the
turbo charger 20 after rotating the turbine 22, is discharged to
the atmosphere after rotating the electricity-generating turbine
28. The electricity-generating turbine 28 rotates the rotating
shaft 32 of the second generator 30.
[0075] The second generator 30 generates electricity in accordance
with the rotation of the rotating shaft 32.
[0076] The electricity generating and air conditioning system
according to this embodiment further includes a heater 48 to
pre-heat a refrigerant passing through a suction line 41a of the
compressor 41, using the electricity generated from at least one of
the first and second generators 10 and 30.
[0077] The electricity generating and air conditioning system of
the second embodiment has the same configuration and functions as
those of the first embodiment, in terms of the engine 2, first
generator 10, turbo charger 20, air conditioner 40, electricity
supply switch S, etc. Accordingly, the constituent elements of the
second embodiment respectively corresponding to those of the first
embodiment are designated by the same reference numerals, and no
detailed description thereof will be given.
[0078] FIG. 5 is a schematic diagram of an electricity generating
and air conditioning system according to a third embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode. FIG. 6 is a schematic diagram of the
electricity generating and air conditioning system according to the
third embodiment of the present invention, illustrating a state in
which the system operates in a cooling mode.
[0079] As shown in FIGS. 5 and 6, the electricity generating and
air conditioning system includes an exhaust gas waste heat
recovering means 50 to recover heat of exhaust gas discharged from
an engine 2 and to heat a refrigerant passing through a discharge
line 41b of a compressor 41, using the recovered exhaust gas heat,
and a cooling water waste heat recovering means 60 to recover heat
of cooling water used to cool the engine 2 and to pre-heat air
blown to an outdoor heat exchanger 44, using the recovered cooling
water heat.
[0080] The exhaust gas waste heat recovering means 50 includes an
exhaust gas waste heat recovering heat exchanger 52 to recover the
heat of the exhaust gas discharged from the engine 2, and a
compressor discharge line heater 54 to heat a refrigerant passing
through the discharge line 41b of the compressor 41, using the heat
recovered by the exhaust gas waste heat recovering heat exchanger
52.
[0081] The exhaust gas waste heat recovering heat exchanger 52 is
arranged at an outlet of an exhaust tube 4, through which the
exhaust gas discharged from the engine 2 passes, such that the
exhaust gas emerging from the outlet of the exhaust tube 4 passes
through the exhaust gas waste heat recovering heat exchanger
52.
[0082] The exhaust gas waste heat recovering means 50 also includes
circulation conduits 56 and 57, which connect the exhaust gas waste
heat recovering heat exchanger 52 and the compressor discharge line
heater 54 to guide a heat medium emerging from the exhaust gas
waste heat recovering heat exchanger 52 such that the heat medium
is circulated into the exhaust waste heat recovering heat exchanger
52 after absorbing heat from the exhaust gas in the exhaust gas
waste heat recovering heat exchanger 52 and subsequently heating
the refrigerant in the compressor discharge line heater 54.
[0083] The exhaust gas waste heat recovering means 50 further
includes a heat medium circulation pump 58 directly connected to
one of the circulation conduits 56 and 57 for the circulation of
the heat medium.
[0084] The cooling water waste heat recovering means 60 includes a
cooling water waste heat recovering heat exchanger 62 to recover
heat of cooling water used to cool the engine 2, and a pre-heater
64 to pre-heat air blown to the outdoor heat exchanger 44, using
the heat recovered by the cooling water waste heat recovering heat
exchanger 62.
[0085] The cooling water waste heat recovering heat exchanger 62 is
connected to the engine 2 via cooling water circulation conduits 7
and 8. A cooling water circulation pump 9 is connected to one of
the engine 2, cooling water waste heat recovering heat exchanger
62, and cooling water circulation conduits 7 and 8.
[0086] The pre-heater 64 is arranged upstream from the outdoor heat
exchanger 44 with respect to a flowing direction of outdoor air O
blown toward the outdoor heat exchanger 44 to heat the blown
outdoor air O.
[0087] The cooling water waste heat recovering means 60 also
includes heat medium circulation conduits 66 and 67, which connect
the cooling water waste heat recovering heat exchanger 62 and the
pre-heater 64 to guide a heat medium emerging from the cooling
water waste heat recovering heat exchanger 62 such that the heat
medium is circulated into the cooling water waste heat recovering
heat exchanger 62 after absorbing heat from the cooling water in
the cooling water waste heat recovering heat exchanger 62 and
subsequently heating the pre-heater 64.
[0088] The cooling water waste heat recovering means 60 further
includes a heat medium circulation pump 68 directly connected to
one of the circulation conduits 66 and 67 for the circulation of
the heat medium.
[0089] The electricity generating and air conditioning system of
the third embodiment has the same configuration and functions as
those of the first embodiment, in terms of the engine 2, first
generator 10, turbo charger 20, air conditioner 40, heater 48,
electricity supply switch S, etc, except for the exhaust gas waste
heat recovering means 50 and cooling water waste heat recovering
means 60. Accordingly, the constituent elements of the third
embodiment respectively corresponding to those of the first
embodiment are designated by the same reference numerals, and no
detailed description thereof will be given.
[0090] In a heating operation of the air conditioner 20 in the
electricity generating and air conditioning system having the
above-described arrangement according to the third embodiment, the
directional valve 45 is switched to a heating mode. In this case,
the heat medium circulation pump 58 is driven for recovery of waste
heat of exhaust gas, and the cooling water circulation pump 9 and
heat medium circulation pump 68 are driven for recovery of waste
heat of cooling water. The compressor 41 and heater 48 are also
driven, using electricity generated from the first and second
generators 10 and 30.
[0091] The switching operation of the directional valve 45 to the
heating mode, the refrigerant circulation achieved in accordance
with the operation of the compressor 41, and the heating operation
achieved in accordance with the refrigerant circulation are the
same as those in the first embodiment, so that no detailed
description thereof will be given.
[0092] When the heat medium circulation pump 58 operates, the heat
medium, which has been heated by exhaust gas in the exhaust gas
waste heat recovering heat exchanger 52, is fed to the compressor
discharge line heater 54 via the heat medium circulation conduit
58, so that the heat medium releases heat into the compressor
discharge line heater 54. Thereafter, the heat medium is circulated
into the exhaust gas waste heat recovering heat exchanger 52 via
the heat medium circulation conduit 57.
[0093] During the circulation of the heat medium, the compressor
discharge line heater 54 heats high-temperature and high-pressure
refrigerant gas passing through the discharge line 41b of the
compressor 41 after being compressed by the compressor 41. The
heated refrigerant emerging from the compressor discharge line
heater 54 passes through the indoor heat exchanger 42 via the
directional valve 45, thereby increasing indoor temperature over
the case in which the refrigerant is not heated by the compressor
discharge line heater 54.
[0094] Meanwhile, when the cooling water circulation pump 9
operates, the cooling water, which has been heated while cooling
the engine 2, is fed to the cooling water waste heat recovering
heat exchanger 62 via the cooling water circulation conduit 8, so
that the cooling water releases heat into the cooling water waste
heat recovering heat exchanger 62. Thereafter, the cooling water is
circulated into the engine 2 via the cooling water circulation
conduit 7.
[0095] When the heat medium circulation pump 68 operates, the heat
medium, which has been heated by exhaust gas in the cooling water
waste heat recovering heat exchanger 62, is fed to the pre-heater
64 via the heat medium circulation conduit 66, so that the heat
medium releases heat into the pre-heater 64. Thereafter, the heat
medium is circulated into the cooling water waste heat recovering
heat exchanger 62 via the heat medium circulation conduit 67.
[0096] During the circulation of the heat medium, outdoor air O
blown toward the outdoor heat exchanger 44 passes through the
outdoor heat exchanger 44 after being heated by the pre-heater 64.
As a result, the outdoor heat exchanger 44 is prevented from being
frosted.
[0097] On the other hand, in a cooling operation of the air
conditioner 20, the directional valve 45 is switched to a cooling
mode. In this case, the cooling water circulation pump 9 is driven.
Also, the compressor 41 is driven, using electricity generated from
the first and second generators 10 and 30, whereas the heat medium
circulation pump 58, heat medium circulation pump 68 and heater 48
do not operate.
[0098] The switching operation of the directional valve 45 to the
cooling mode, the refrigerant circulation achieved in accordance
with the operation of the compressor 41, and the cooling operation
achieved in accordance with the refrigerant circulation are the
same as those in the first embodiment, so that no detailed
description thereof will be given.
[0099] Exhaust gas discharged from the engine transfers heat to the
exhaust gas waste heat recovering heat exchanger 52 while passing
through the exhaust gas waste heat recovering heat exchanger 52.
The exhaust gas waste heat recovering heat exchanger 52 releases
the heat absorbed from the exhaust gas to the atmosphere.
[0100] Also, cooling water used to cool the engine 2 transfers heat
to the cooling water waste heat recovering heat exchanger 62 while
being circulated through the cooling water waste heat recovering
heat exchanger 62 and engine 2, as in the heating operation. The
cooling water waste heat recovering heat exchanger 62 releases the
heat absorbed from the cooling water to the atmosphere.
[0101] FIG. 7 is a schematic diagram of an electricity generating
and air conditioning system according to a fourth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode. FIG. 8 is a schematic diagram of the
electricity generating and air conditioning system according to the
fourth embodiment of the present invention, illustrating a state in
which the system operates in a cooling mode.
[0102] As shown in FIGS. 7 and 8, the electricity generating and
air conditioning system includes an exhaust gas waste heat
recovering means 50 to recover heat of exhaust gas discharged from
an engine 2 and to heat a refrigerant passing through a discharge
line 41b of a compressor 41, using the recovered exhaust gas heat,
and a cooling water waste heat recovering means 60 to recover heat
of cooling water used to cool the engine 2 and to pre-heat air
blown to an outdoor heat exchanger 44, using the recovered cooling
water heat.
[0103] The electricity generating and air conditioning system of
the fourth embodiment has the same configuration and functions as
those of the second embodiment, in terms of the engine 2, first
generator 10, turbo charger 20, electricity-generating turbine 28,
second generator 30, air conditioner 40, heater 48, electricity
supply switch S, etc, except for the exhaust gas waste heat
recovering means 50 and cooling water waste heat recovering means
60. Accordingly, the constituent elements of the fourth embodiment
respectively corresponding to those of the second embodiment are
designated by the same reference numerals, and no detailed
description thereof will be given. The exhaust gas waste heat
recovering means 50 and cooling water waste heat recovering means
60 are identical to those of the third embodiment, so that no
detailed description thereof will be given.
[0104] FIG. 9 is a schematic diagram of an electricity generating
and air conditioning system according to a fifth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode.
[0105] As shown in FIG. 9, the electricity generating and air
conditioning system includes a heater 48' to heat a refrigerant
passing through a discharge line 41b of the compressor 41. The
electricity generating and air conditioning system of the fifth
embodiment has the same configuration and functions as those of the
first embodiment or third embodiment, except for the heater 48'.
Accordingly, the constituent elements of the fifth embodiment
respectively corresponding to those of the first embodiment or
third embodiment are designated by the same reference numerals, and
no detailed description thereof will be given.
[0106] In the electricity generating and air conditioning system of
this embodiment, the refrigerant, which passes through the
discharge line 41b of the compressor 41 during a heating operation
of the heat pump type air conditioner 20, is heated, so that the
heating performance of the indoor heat exchanger 42 is
enhanced.
[0107] FIG. 10 is a schematic diagram of an electricity generating
and air conditioning system according to a sixth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode.
[0108] As shown in FIG. 10, the electricity generating and air
conditioning system includes a heater 48' to heat a refrigerant
passing through a discharge line 41b of the compressor 41. The
electricity generating and air conditioning system of the sixth
embodiment has the same configuration and functions as those of the
second embodiment or fourth embodiment, except for the heater 48'.
Accordingly, the constituent elements of the sixth embodiment
respectively corresponding to those of the second embodiment or
fourth embodiment are designated by the same reference numerals,
and no detailed description thereof will be given.
[0109] In the electricity generating and air conditioning system of
this embodiment, the refrigerant, which passes through the
discharge line 41b of the compressor 41 during a heating operation
of the heat pump type air conditioner 20, is heated, so that the
heating performance of the indoor heat exchanger 42 is
enhanced.
[0110] FIG. 11 is a schematic diagram of an electricity generating
and air conditioning system according to a seventh embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode.
[0111] As shown in FIG. 11, the electricity generating and air
conditioning system includes an engine 2, a first generator 10
connected to an output shaft of the engine 2 to generate
electricity, an electricity-generating turbine 28 to be rotated by
exhaust gas discharged from the engine, a second generator 30
connected to the electricity-generating turbine 28 to generate
electricity, and an air conditioner 40, which uses the electricity
generated from at least one of the first and second generators 10
and 30, and includes a compressor 41, an inner heat exchanger 42,
an expansion device 43, and an outdoor heat exchanger 44. The
electricity generating and air conditioning system also includes a
heater 48 to pre-heat a refrigerant passing through a suction line
41a of the compressor 41, using the electricity generated from at
least one of the first and second generators 10 and 30.
[0112] The electricity-generating turbine 28 is arranged at an
exhaust tube 4 connected to the engine 2 such that the
electricity-generating turbine 28 is rotated by exhaust gas passing
through the exhaust tube 4.
[0113] The electricity generating and air conditioning system
further includes an exhaust gas waste heat recovering means 50 to
recover heat of exhaust gas discharged from an engine 2 and to heat
a refrigerant passing through a discharge line 41b of the
compressor 41, using the recovered exhaust gas heat, and a cooling
water waste heat recovering means 60 to recover heat of cooling
water used to cool the engine 2 and to pre-heat air blown to an
outdoor heat exchanger 44, using the recovered cooling water
heat.
[0114] The electricity generating and air conditioning system of
the seventh embodiment has the same configuration and functions as
those of any one of the first through fourth embodiments, in terms
of the engine 2, etc., except for the electricity-generating
turbine 28. Accordingly, the constituent elements of the seventh
embodiment respectively corresponding to those of any one of the
first through fourth embodiment are designated by the same
reference numerals, and no detailed description thereof will be
given.
[0115] FIG. 12 is a schematic diagram of an electricity generating
and air conditioning system according to an eighth embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode.
[0116] As shown in FIG. 12, the electricity generating and air
conditioning system includes a heater 48' to heat a refrigerant
passing through a discharge line 41b of the compressor 41. The
electricity generating and air conditioning system of the eighth
embodiment has the same configuration and functions as those of the
fifth embodiment, except for the heater 48'. Accordingly, the
constituent elements of the eighth embodiment respectively
corresponding to those of the fifth embodiment are designated by
the same reference numerals, and no detailed description thereof
will be given.
[0117] FIG. 13 is a schematic diagram of an electricity generating
and air conditioning system according to a ninth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode.
[0118] As shown in FIG. 13, the electricity generating and air
conditioning system includes a plurality of engines 2, 2' . . . .
The electricity generating and air conditioning system also
includes a plurality of generators 10, 10' . . . connected to
respective shafts of the engines 2, 2' . . . . The electricity
generating and air conditioning system of the ninth embodiment has
the same configuration and functions as those of the first through
fourth embodiments, except for the engines 2, 2' . . . and
generators 10, 10' . . . . Accordingly, the constituent elements of
the ninth embodiment respectively corresponding to those of the
first through fourth embodiments are designated by the same
reference numerals, and no detailed description thereof will be
given.
[0119] One or more of the engines 2, 2' . . . operate in accordance
with the load to be cooled or heated.
[0120] Fuel tubes 3, 3' . . . are connected to respective engines
2, 2' . . . . Also, pairs of cooling water circulation conduits 7
and 8, 7' and 8' . . . are connected to respective engines 2, 2' .
. . .
[0121] Exhaust gas tubes 4, 4' . . . are connected in parallel.
[0122] The cooling water circulation conduits 7 and 8, 7' and 8' .
. . are connected in parallel.
[0123] Cooling water circulation pumps 9, 9' . . . are directly
connected to the cooling water circulation conduit 7 or 8, cooling
water circulation conduit 7' or 8' . . . , respectively.
[0124] FIG. 14 is a schematic diagram of an electricity generating
and air conditioning system according to a tenth embodiment of the
present invention, illustrating a state in which the system
operates in a heating mode.
[0125] As shown in FIG. 14, the air conditioner, that is, the air
conditioner 40, which is included in the electricity generating and
air conditioning system, is of a multi-type. That is, the air
conditioner 40 includes a plurality of indoor units 110, 120 . . .
, and a single outdoor unit 130. The indoor units 110, 120 . . .
include indoor heat exchangers 42, 42' . . . , which are connected
in parallel, respectively. The electricity generating and air
conditioning system of this embodiment has the same configuration
and functions as those of any one of the first through fourth
embodiments, except that the air conditioner 40 includes a
plurality of indoor units 110, 120 . . . , and thus, a plurality of
indoor heat exchangers 42, 42' . . . . Accordingly, the constituent
elements of the tenth embodiment respectively corresponding to
those of any one of the first through fourth embodiments are
designated by the same reference numerals, and no detailed
description thereof will be given.
[0126] The indoor units 110, 120 . . . also include indoor blowers
46, 46' . . . , respectively.
[0127] FIG. 15 is a schematic diagram of an electricity generating
and air conditioning system according to an eleventh embodiment of
the present invention, illustrating a state in which the system
operates in a heating mode.
[0128] As shown in FIG. 15, the electricity generating and air
conditioning system according to this embodiment includes an engine
2, a first generator 10 connected to an output shaft of the engine
2 to generate electricity, a turbo charger 20, which includes a
turbine 22 to be rotated by exhaust gas discharged from the engine
2, a second generator 30 connected to the turbine 22 to generate
electricity, and an air conditioner 40, which uses the electricity
generated from at least one of the first and second generators 10
and 30, and includes a plurality of indoor units 110, 120 . . . ,
and a plurality of outdoor units 130, 140 . . . . The electricity
generating and air conditioning system also includes heaters 48,
48' . . . respectively arranged in respective outdoor units 130,
140 . . . to pre-heat refrigerant passing through respective
suction lines 41a of the compressors 41, 41' included in the
outdoor units 130, 140 . . . , using the electricity generated from
at least one of the first and second generators 10 and 30, an
exhaust gas waste heat recovering heat exchanger 52 to recover heat
of exhaust gas discharged from the engine 2, and a plurality of
compressor discharge line heaters 54, 54' . . . respectively
arranged in the outdoor units 130, 140 . . . to heat refrigerant
passing through respective discharge lines 41b, 41b' . . . of
compressors 41, 41' . . . arranged in respective outdoor units 130,
140 . . . , using the heat recovered by the exhaust gas waste heat
recovering heat exchanger 52. The electricity generating and air
conditioning system further includes a cooling water waste heat
recovering heat exchanger 62 to recover heat of cooling water used
to cool the engine 2, and a plurality of pre-heaters 64, 64' . . .
respectively arranged in the outdoor units 130, 140 . . . to
pre-heat air blown to respective outdoor heat exchangers 44, 44' .
. . of the outdoor units 130, 140 . . . , using the heat recovered
by the cooling water waste heat recovering heat exchanger 62. The
electricity generating and air conditioning system of this
embodiment has the same configuration and functions as those of the
first through fourth embodiments, except for a plurality of indoor
units 110, 120 . . . , and a plurality of outdoor units 130, 140 .
. . . Accordingly, the constituent elements of the eleventh
embodiment respectively corresponding to those of the first through
fourth embodiments are designated by the same reference numerals,
and no detailed description thereof will be given.
[0129] The indoor units 110, 120 . . . include respective indoor
heat exchangers 42, 42' . . . , and respective indoor blowers 46,
46' . . . .
[0130] The outdoor units 130, 140 . . . include respective
compressors 41, 41' . . . , directional valves 45, 45' . . . ,
respective expansion devices 43, 43' . . . , respective outdoor
heat exchangers 44, 44' . . . , outdoor blowers 47, 47' . . . ,
heaters 48, 48', compressor discharge line heaters 54, 54' . . . ,
and respective pre-heaters 64, 64' . . . .
[0131] In the air conditioner 40, refrigerant conduits respectively
included in the indoor units 110, 120 . . . may be connected in
parallel. Refrigerant conduits respectively included in the outdoor
units 130. 140 . . . may also be connected in parallel. The
following description will be given in conjunction with the case in
which each of the outdoor units 130, 140 . . . are connected to an
associated one of the indoor units 110, 120 . . . to constitute one
air conditioner set, and each air conditioner set operates
independently of other air conditioner sets.
[0132] Pairs of heat medium circulation conduits 56 and 57, 56' and
57' . . . are arranged between the exhaust gas waste heat
recovering heat exchanger 52 and respective compressor discharge
line heaters 54, 54' . . . to connect the exhaust gas waste heat
recovering heat exchanger 52 and respective compressor discharge
line heaters 54, 54' . . . . Heat medium circulation pumps 58, 58'
. . . are directly connected to respective pairs of heat medium
circulation conduits 56 and 57, 56' and 57'. . . .
[0133] After absorbing heat from exhaust gas in the exhaust gas
waste heat recovering heat exchanger 52, the heat medium may be
distributed to all compressor discharge line heaters 54, 54' . . .
to enhance the heating performances of the indoor units 110, 120 .
. . . Alternatively, the heat medium may be supplied to only the
compressor discharge line heater of the currently-operating outdoor
unit, for example, the compressor discharge line heater 54 of the
outdoor unit 130. In this case, it is possible to concentratedly
enhance the heating performances of the indoor unit 110 connected
to the currently-operating outdoor unit 130.
[0134] The heat medium circulation conduits 56 and 57, 56' and 57'
. . . are connected in parallel.
[0135] Pairs of heat medium circulation conduits 66 and 67, 66' and
67' . . . are arranged between the cooling water waste heat
recovering heat exchanger 62 and respective pre-heaters 64, 64' . .
. to connect the cooling water waste heat recovering heat exchanger
62 and respective pre-heaters 64, 64' . . . . Heat medium
circulation pumps 68, 68' . . . are directly connected to
respective pairs of heat medium circulation conduits 66 and 67, 66'
and 67'. . . .
[0136] The heat medium circulation conduits 66 and 67, 66' and 67'
. . . are connected in parallel.
[0137] After absorbing heat from cooling water in the cooling water
waste heat recovering heat exchanger 62, the heat medium may be
distributed to all pre-heaters 64, 64' . . . to prevent all outdoor
heat exchangers 44, 44' . . . from being frosted. Alternatively,
the heat medium may be supplied to only the pre-heater of the
currently-operating outdoor unit, for example, the pre-heater 64 of
the outdoor unit 130. In this case, it is possible to prevent the
outdoor heat exchanger 44 of the currently-operating outdoor unit
130 from being frosted.
[0138] As apparent from the above description, the electricity
generating and air conditioning system according to the present
invention has an advantage in that the first generator coupled to
the output shaft of the engine generates electricity, the turbo
charger is operated by exhaust gas discharged from the engine, to
enhance the power of the engine, and the second generator coupled
to the turbo charger generates electricity, so that it is possible
to achieve an enhancement in energy efficiency.
[0139] In the electricity generating and air conditioning system
according to the present invention, the first generator coupled to
the output shaft of the engine generates electricity. The turbo
charger is operated by exhaust gas discharged from the engine, to
enhance the power of the engine. Also, the exhaust gas used to
operate the turbo charger also may rotate the
electricity-generating turbine, so that the second generator
coupled to the electricity-generating turbine generates
electricity. Accordingly, it is possible to minimize the load of
the turbo charger and to achieve an enhancement in energy
efficiency.
[0140] The electricity generating and air conditioning system
according to the present invention also has an advantage in that
heat of the exhaust gas discharged from the engine is recovered,
and is supplied to the discharge line of the compressor, to heat a
refrigerant passing through the compressor discharge line, so that
an improvement in the heating performance of the indoor heat
exchanger is achieved.
[0141] The electricity generating and air conditioning system
according to the present invention also has an advantage in that
heat of cooling water used to cool the engine is recovered to
pre-heat air blown to the outdoor heat exchanger, so that it is
possible to prevent the outdoor heat exchanger from being frosted,
and to achieve an enhancement in heating performance.
[0142] The electricity generating and air conditioning system
according to the present invention includes a heater to pre-heat a
refrigerant passing through the suction line of the compressor,
using the electricity generated from at least one of the first and
second generators, so that it is possible to enhance the heating
performance of the indoor heat exchanger or to reduce the power
consumption of the compressor in accordance with the pre-heating
operation of the pre-heater.
[0143] Although the preferred embodiments of the invention have
been disclosed for illustrative purposes, those skilled in the art
will appreciate that various modifications, additions and
substitutions are possible, without departing from the scope and
spirit of the invention as disclosed in the accompanying
claims.
* * * * *