U.S. patent application number 11/990087 was filed with the patent office on 2010-06-24 for dehumidifying cooling device for district heating.
Invention is credited to Sung-Ook Jeong, Chang-Ku Kang, Dae-Young Lee, Hoon Lee, Seok-Mann Yoon.
Application Number | 20100154455 11/990087 |
Document ID | / |
Family ID | 39060871 |
Filed Date | 2010-06-24 |
United States Patent
Application |
20100154455 |
Kind Code |
A1 |
Yoon; Seok-Mann ; et
al. |
June 24, 2010 |
Dehumidifying Cooling Device for District Heating
Abstract
Disclosed is a dehumidifying cooling device for district heating
which comprises; a case having a first partition to divide the
interior of the case into a wet channel and a dry channel and a
second partition to divided the wet channel into a first wet
channel and a second wet channel, a sensible heat exchanger to heat
exchange the outside air in the first wet channel with the outside
air in the second wet channel, a heating coil for raising the
temperature of the outside air in the second wet channel, a
rotatable de humidifying wheel for adsorbing and removing moisture
contained in the circulated air within the dry channel, and a
regenerative-evaporative cooler for cooling the circulated air in
the dry channel. With this configuration, the device can carry out
an air cooling operation by use of hot water supplied by district
heating systems and gas or oil boilers installed in individual
households, thereby achieving a reduced device size via the
implementation of the cooling operation under the atmospheric
pressure state and reducing manufacturing costs by virtue of a
simplified system configuration.
Inventors: |
Yoon; Seok-Mann; (Incheon,
KR) ; Lee; Dae-Young; (Seoul, KR) ; Lee;
Hoon; (Yongin, KR) ; Kang; Chang-Ku; (Seoul,
KR) ; Jeong; Sung-Ook; (Seoul, KR) |
Correspondence
Address: |
GWIPS;Peter T. Kwon
Gwacheon P.O. Box 72, 119 Byeolyang Ro
Gwacheon City, Gyeonggi-Do
427-600
KR
|
Family ID: |
39060871 |
Appl. No.: |
11/990087 |
Filed: |
March 8, 2007 |
PCT Filed: |
March 8, 2007 |
PCT NO: |
PCT/KR2007/001148 |
371 Date: |
February 6, 2008 |
Current U.S.
Class: |
62/271 ;
165/104.34; 165/7; 165/8 |
Current CPC
Class: |
F24F 2203/1024 20130101;
F24F 2203/1072 20130101; F24F 3/1423 20130101; F24F 2203/104
20130101; F24F 2203/1028 20130101; F24F 2203/1032 20130101; F24F
2203/1084 20130101 |
Class at
Publication: |
62/271 ; 165/8;
165/7; 165/104.34 |
International
Class: |
F25B 15/00 20060101
F25B015/00; F23L 15/02 20060101 F23L015/02; F28D 15/00 20060101
F28D015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 1, 2007 |
KR |
10-2007-0010673 |
Claims
1. A dehumidifying cooling device for district heating comprising:
a case having a first partition to divide the interior of the case
into a wet channel and a dry channel and a second partition to
divide the wet channel into a first wet channel and a second wet
channel, the first wet channel being provided at one end thereof
with an outside air suction hole for introducing outside air into
the first wet channel, the second wet channel being provided at one
end thereof with an exhaust hole for discharging the outside air,
the second partition being perforated with a flow hole for
transferring the outside air from the first wet channel into the
second wet channel, the dry channel being provided, at one end
thereof, with a circulated air suction hole for introducing
circulated air from a conditioning space into the dry channel and,
at the other end thereof, with an air supply hole for supplying
cooling air into the conditioning space, a sensible heat exchanger
configured to rotate about the second partition and serving to heat
exchange the outside air, introduced into the first wet channel
through the outside air suction hole, with the outside air to be
discharged from the second wet channel; a heating coil installed in
the second wet channel at a position between a rear end of the
sensible heat exchanger and the flow hole and serving to raise the
temperature of the outside air passing through the second wet
channel by use of heat of hot water introduced into the heating
coil; a dehumidifying wheel configured to rotate about the first
partition at a position between a rear end of the heating coil and
the flow hole and serving to adsorb and remove moisture contained
in the circulated air within the dry channel, the dehumidifying
wheel being regenerated by evaporating the adsorbed moisture to
thereby supply the evaporated moisture into the high-temperature
outside air in the first wet channel; and a
regenerative-evaporative cooler installed in the dry channel at a
position between the circulated air supply hole and the
dehumidifying wheel and serving to cool the circulated air in the
dry channel, which was dehumidified into high-temperature dry air
by the dehumidifying wheel and subsequently, heat exchanged and
cooled, the cooled circulated air being delivered to the air supply
hole of the case.
2. The device according to claim 1, further comprising: a
direct-evaporative cooler installed in the dry channel at a
position in front of the regenerative-evaporative cooler, the
direct-evaporative cooler serving to carry out a secondary cooling
operation of the circulated air discharged from the
regenerative-evaporative cooler.
3. The device according to claim 1, further comprising: a first
filter installed in the first wet channel at a position between the
outside air suction hole and the sensible heat exchanger and
serving to remove impurities contained in the outside air.
4. The device according to claim 1, further comprising: an exhaust
blower installed in the second wet channel at a position between
the sensible heat exchanger and the flow hole and serving to
forcibly discharge the outside air from the second wet channel
through the exhaust hole.
5. The device according to claim 1, further comprising: a second
filter installed between the circulated air suction hole and the
dehumidifying wheel and serving to remove impurities contained in
the circulated air; and an air supply blower installed between the
dehumidifying wheel and the regenerative-evaporative cooler and
serving to forcibly discharge the cooled circulated air from the
dry channel through the air supply hole, wherein the second filter
and the air supply blower are installed the dry channel.
6. The device according to claim 1, wherein the case further has a
cooler exhaust hole provided at the dry channel for discharging
high-temperature air generated while the regenerative-evaporative
cooler carried out a secondary cooling operation.
7. The device according to claim 6, wherein the amount of the
high-temperature air to be discharged through the cooler exhaust
hole is 30% of the total circulated air.
8. The device according to claim 1, wherein the hot water to be
introduced into the heating coil is delivered from any one selected
from among a cogeneration plant, a heating boiler, a micro-turbine,
a small gas engine, a small gas turbine, a gas boiler, and an oil
boiler.
9. The device according to claim 1, wherein the circulated air
suctioned through the circulated air suction hole is mixed with the
outside air by a predetermined mixing ratio.
10. The device according to claim 1, wherein the predetermined
mixing ratio of the circulated air to the outside air is 7:3.
Description
TECHNICAL FIELD
[0001] The present invention relates to a dehumidifying cooling
device for district heating, and more particularly, to a
dehumidifying cooling device for district heating which can carry
out an air cooling operation by use of hot water supplied by
large-scale or small-scale district heating systems and gas or oil
boilers installed in individual households.
BACKGROUND ART
[0002] There is spreading a prospect that the recent high oil price
situation is not a temporary problem, but is continuously
maintained and fixed. Thereby, main energy consuming countries of
the world increasingly take a great effort for securing stable
energy resources. With the effectuation of the Tokyo protocol
dealing with a reduction in the discharge of greenhouse gas for the
sake of preventing global warming, it will be expected that an
international pressure about the use limit of fossil energy, the
criterion of energy efficiency, etc. will be strengthened.
[0003] According to the published energy report, the amount of
energy consumed in domestic and business fields of Korean in 2003
is approximately 55 millions TOE a year, and occupies 25.2% of the
total national consumption energy. This rate also corresponds to
41.9% on the basis of electricity. For the past four years, the
energy consumption of domestic and business fields shows an average
annual rate of increase of 5.3%, whereas the consumption of
electricity shows an average annual rate of increase of 12%.
Accordingly, it will be appreciated that the consumption of
electricity particularly has a rapid increase. Estimating on the
basis of a variation in the monthly energy consumption of
residential buildings and sample survey results about
non-residential buildings as the subject of energy controlment, it
is analyzed that 50% of the energy consumption of residential
buildings and 47% of the energy consumption of business buildings
are used for air conditioning. In conclusion, of the energy
consumption of buildings, energy required for air conditioning
occupies 13% of the national total energy consumption of Korea.
[0004] Accordingly, to guarantee the efficient use of energy and
the continuous development of energy industry while observing
related international agreements, it is necessary to improve the
use efficiency of energy for air conditioning in domestic and
business fields. From this viewpoint, there is put in force a
so-called collective-energy industry in which thermal energy and
electricity, generated from energy generation facilities
concentrated on a specific place for improving the use efficiency
of energy in domestic and business fields, are supplied
collectively to a plurality of users in residential and business
areas. It is reported that the collective-energy industry utilizes
waste heat occurred during power generation as a heating source for
space heating and hot water heating, thereby achieving not only a
reduction of energy by approximately 20 to 30% by virtue of an
improved use efficiency of energy, but also an improvement of air
environment by approximately 30 to 40% by virtue of a reduction
usage of fuel and intensive environmental managements. The
collective-energy industry is evaluated as an effective industry
capable of dealing with related international environmental
restrictions including a climatic change convention, etc. In the
affirmative evaluation's debt, in Korea, approximately 1.2 million
families share in the benefits of district heating in 2003, and in
particular, 85% of supplied energy is generated by combined heat
and power generation. Korea has a plan to expand the propagation
range of district heating to 2 million families by 2010.
[0005] In the combined heat and power generation, namely,
cogeneration, the generation ratio of electricity to heat is fixed
at 3:5. Therefore, it is important to keep the ratio of electricity
to heat at an appropriate level for maximizing the effect of the
collective-energy industry. In Korea, the above mentioned
generation ratio can be fulfilled in winter, but the summer of
Korea has an increased electricity load for air cooling and
substantially no heat load. As a result, the operation rate of
distinct heating in summer decreases to less than 10%, and this
causes a deterioration in the economical efficiency of
cogeneration. Actually, no generation results reported between June
and September in 2003.
[0006] To improve the operation rate of collective-energy
generation facilities for sufficiently utilizing the effects of the
industry, excavating the demand of heat in summer is necessary, and
in particular, development and propagation of a technology for
supplying cooling energy using distinct heating facilities is
necessary.
[0007] In one example of the above described cooling energy supply
technology, an absorption chiller is installed to a receptor, such
as a large-scale building, etc. such that the chiller performs a
central cooling operation using energy delivered from distinct
heating facilities.
[0008] The absorption chiller is designed to chill water flowing in
a pipe by use of heat generated during the evaporation of a
liquid-phase refrigerant and condense the evaporated gas-phase
refrigerant for the reuse thereof.
DISCLOSURE
Technical Problem
[0009] However, despite of various researches and developments for
improving the performance thereof, the absorption chiller has a
limit in the improvement of performance due to a low temperature of
a heating source. In addition, the absorption chiller has an
uneconomical high water return temperature because it cannot use
water having a temperature of 80.degree. C. or less, and suffers
from a little difference between the temperature of supplied water
and the temperature of water to be returned.
[0010] When the absorption chiller is installed to an apartment,
etc. occupying the most part of district heating, so as to carry
out a central cooling operation, there is a problem in that cold
water pipes have to be additionally installed regardless of hot
water supply pipes.
[0011] Therefore, the present invention has been made in view of
the above problems, and it is an object of the present invention to
provide a dehumidifying cooling device for district heating which
can carry out an air cooling operation by use of hot water supplied
by large-scale or small-scale district heating systems and gas or
oil boilers installed in individual households, thereby achieving a
reduced device size via the implementation of the cooling operation
under the atmospheric pressure state and reducing manufacturing
costs by virtue of a simplified system configuration.
Technical Solution
[0012] In accordance with an aspect of the present invention, the
above and other objects can be accomplished by the provision of a
dehumidifying cooling device for district heating comprising: a
case having a first partition to divide the interior of the case
into a wet channel and a dry channel and a second partition to
divided the wet channel into a first wet channel, and a second wet
channel, the first wet channel being provided at one end thereof
with an outside air suction hole for introducing outside air into
the first wet channel, the second wet channel being provided at one
end thereof with an exhaust hole for discharging the outside air,
the second partition being perforated with a flow hole for
transferring the outside air from the first wet channel into the
second wet channel, the dry channel being provided, at one end
thereof, with a circulated air suction hole for introducing
circulated air from a conditioning space into the dry channel and,
at the other end thereof, with an air supply hole for supplying
cooling air into the conditioning space; a sensible heat exchanger
configured to rotate about the second partition and serving to heat
exchange the outside air, introduced into the first wet channel
through the outside air suction hole, with the outside air to be
discharged from the second wet channel; a heating coil installed in
the second wet channel at a position between a rear end of the
sensible heat exchanger and the flow hole and serving to raise the
temperature of the outside air passing through the second wet
channel by use of heat of hot water introduced into the heating
coil; a dehumidifying wheel configured to rotate about the first
partition at a position between a rear end of the heating coil and
the flow hole and serving to adsorb and remove moisture contained
in the circulated air within the dry channel, the dehumidifying
wheel being regenerated by evaporating the adsorbed moisture to
thereby supply the evaporated moisture into the high-temperature
outside air in the first wet channel; and a
regenerative-evaporative cooler installed in the dry channel at a
position between the circulated air supply hole and the
dehumidifying wheel and serving to cool the circulated air in the
dry channel, which was dehumidified to high-temperature dry air by
the dehumidifying wheel and subsequently, heat exchanged and
cooled, the cooled circulated air being delivered to the air supply
hole of the case.
[0013] Preferably, the device further comprises a
direct-evaporative cooler installed in the dry channel at a
position in front of the regenerative-evaporative cooler, the
direct-evaporative cooler serving to carry out a secondary cooling
operation of the circulated air discharged from the
regenerative-evaporative cooler.
[0014] Preferably, the device further comprises a first filter
installed in the first wet channel at a position between the
outside air suction hole and the sensible heat exchanger and
serving to remove impurities contained in the outside air.
[0015] Preferably, the device further comprises an exhaust blower
installed in the second wet channel at a position between the
sensible heat exchanger and the flow hole and serving to forcibly
discharge the outside air from the second wet channel through the
exhaust hole.
[0016] Preferably, the device further comprises: a second filter
installed between the circulated air suction hole and the
dehumidifying wheel and serving to remove impurities contained in
the circulated air; and an air supply blower installed between the
dehumidifying wheel and the regenerative-evaporative cooler and
serving to forcibly discharge the cooled circulated air from the
dry channel through the air supply hole, wherein the second filter
and the air supply blower are installed in the dry channel.
[0017] Preferably, the case further has a cooler exhaust hole
provided at the dry channel for discharging high-temperature air
generated while the regenerative-evaporative cooler carries out a
secondary cooling operation.
[0018] Preferably, the amount of the high-temperature air to be
discharged through the cooler exhaust hole is 30% of the total
circulated air.
[0019] Preferably, the hot water to be introduced into the heating
coil is delivered from any one selected from among a cogeneration
plant, a heating boiler, a micro-turbine, a small gas engine, a
small gas turbine, a gas boiler, and an oil boiler.
[0020] Preferably, the circulated air suctioned through the
circulated air suction hole is mixed with the outside air by a
predetermined mixing ratio of 7:3.
ADVANTAGEOUS EFFECTS
[0021] According to a dehumidifying cooling device for district
heating of the present invention having the above described
configuration, it is possible to carry out an air cooling operation
by use of hot water supplied by large-scale or small-scale district
heating systems and gas or oil boilers installed in individual
households. Accordingly, the present invention has the effect of
achieving a reduced device size via the implementation of the
cooling operation under the atmospheric pressure state, and
reducing manufacturing costs by virtue of a simplified system
configuration.
DESCRIPTION OF DRAWINGS
[0022] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0023] FIG. 1 is a view illustrating the configuration of a
dehumidifying cooling device for district heating according to the
present invention;
[0024] FIG. 2 is a view illustrating the flow of air in the
dehumidifying cooling device for district heating according to the
present invention; and
[0025] FIG. 3 is a graph illustrating the temperature distribution
of humid air used in the dehumidifying cooling device for district
heating according to the present invention.
BEST MODE
[0026] Now, the configuration of a dehumidifying cooling device for
district heating according to the present invention will be
described in detail with reference to the accompanying
drawings.
[0027] In the following description of the present invention, a
detailed description of known functions and configurations
incorporated herein will be omitted when it may make the subject
matter of the present invention rather unclear. Also, the terms
used in the following description are terms defined taking into
consideration the functions obtained in accordance with the present
invention. The definitions of these terms should be determined
based on the whole content of this specification because they may
be changed in accordance with the option of a user or operator or a
usual practice.
[0028] FIG. 1 is a view illustrating the configuration of a
dehumidifying cooling device for district heating according to the
present invention.
[0029] Referring to FIG. 1, the dehumidifying cooling device 100
according to the present invention comprises a case 110, a first
filter 120, a sensible heat exchanger 130, a heating coil 140, a
dehumidifying wheel 150, an exhaust blower 160, a second filter
170, an air supply blower 180, a regenerative-evaporative cooler
190, and a direct-evaporative cooler 200.
[0030] The case 110 is made of a metallic material and has a
rectangular box shape. The case 110 is installed with a first
partition 113 to divide the interior of the case 110 into a wet
channel 112 and a dry channel 111. The case 110 is further
installed with a second partition 114 to divide the wet channel 112
into a first wet channel 112-1 and a second wet channel 112-2. The
case 110 has an outside air suction hole 115 provided at one end of
the first wet channel 112-1 for introducing outside air into the
first wet channel 112-1 and an exhaust hole 116 provided at one end
of the second wet channel 112-2 for discharging the outside air.
The second partition 114 is perforated with a flow hole 114-1 for
transferring the outside air from the first wet channel 112-1 into
the second wet channel 112-2. The case 110 also has a circulated
air suction hole 117 provided at one end of the dry channel 111 for
introducing circulated air from a conditioning space CS into the
dry channel 111 and an air supply hole 118 provided at the other
end of the dry channel 111 for supplying cooling air into the
conditioning space CS. The dry channel 111 of the case 110 is
further provided with a cooler exhaust hole 119 for discharging
high-temperature air generated while the regenerative-evaporative
cooler 190 carries out a secondary cooling operation that will be
described hereinafter. The circulated air, introduced into the case
110 through the circulated air suction hole 117, is mixed with the
outside air at a ratio of 7:3, to keep the interior of the case 110
in the atmospheric pressure state.
[0031] The first filter 120 is located in the first wet channel
112-1 of the case 110 at a position between the outside air suction
hole 115 and the sensible heat exchanger 130. The first filter 120
is used to remove impurities contained in the suctioned outside
air. Preferably, the first filter 120 is an antibacterial filter,
and is easily separable from the case 110.
[0032] The sensible heat exchanger 130 has a rotating shaft 131
installed in the same direction as the second partition 114 and
takes the form of a disc to rotate about the rotating shaft 131
inside the first and second wet channels 112-1 and 112-2 of the
case 110. The sensible heat exchanger 130 is used to heat exchange
the outside air introduced into the first wet channel 112-1 through
the outside air suction hole 115 with the outside air to be
discharged from the second whet channel 112-2 through the exhaust
hole 116. The sensible heat exchanger 130 takes the form of a
honeycomb-patterned disc fabricated by processing a thin plate,
such as an aluminum plate, etc. suitable for heat exchange. There
are provided an additional motor and belt (not shown) for rotation
of the sensible heat exchanger 130.
[0033] The heating coil 140 is located in the first wet channel
112-1 of the case 110 at a position between a rear end of the
sensible heat exchanger 130 and the flow hole 114-1. The heating
coil 140 is used to raise the temperature of the outside pair
passing through the first wet channel 112-1 by use of heat of hot
water introduced thereinto. The hot water introduced into the
heating coil 140 is delivered from any one selected from among a
cogeneration plant, a heating boiler, a micro-turbine, a small gas
engine, a small gas turbine, a gas boiler, and an oil boiler, and
has a temperature within a range of 60 to 120.degree. C.
[0034] The dehumidifying wheel 150 has a rotating shaft 151
installed in the same direction as the first partition 113, and
takes the form of a disc to rotate about the rotating shaft 151
inside the first wet channel 112-1 and the dry channel 111 of the
case 110. The dehumidifying wheel 150 is located behind the heating
coil 140 and serves to adsorb and remove moisture contained in the
circulated air within the dry channel 111. The dehumidifying wheel
150 is regenerated by evaporating the adsorbed moisture to thereby
supply the moisture into the high-temperature outside air within
the first wet channel 112-1. The dehumidifying wheel 150 takes the
form of a honeycomb-patterned disc containing an adsorbent, such as
silica gel, zeolite, or the like, for adsorbing the moisture
contained in the circulated air in a dry adsorption manner. There
are provided an additional motor and belt (not shown) for rotation
of the dehumidifying wheel 150.
[0035] The exhaust blower 160 is installed in the second wet
channel 112-2 of the case 110 at a position between the sensible
heat exchanger 130 and the flow hole 114-1, and used to forcibly
discharge the outside air from the second wet channel 112-2 through
the exhaust hole 116.
[0036] The second filter 170 is installed in the dry channel 111 of
the case 110 at a position between the circulated air suction hole
117 and the dehumidifying wheel 150 and used to remove impurities
and bad smell contained in the circulated air. Preferably, the
second filter 170 is an antibacterial filter, and is easily
separable from the case 110.
[0037] The air supply blower 180 is installed in the dry channel
111 of the case 110 at a position between the dehumidifying wheel
150 and the sensible heat exchanger 130 and used to forcibly
discharge the circulated air from the dry channel 111 through the
circulated air supply hole 118.
[0038] The regenerative-evaporative cooler 190 is installed in the
dry channel 111 at a position between the circulated air supply
hole 118 and the dehumidifying wheel 150. If the circulated air
introduced into the dry channel 111 is dehumidified by the
dehumidifying wheel 150 so as to be changed to high-temperature dry
air and subsequently, heat exchanged and cooled, the
regenerative-evaporative cooler 190 further cools the circulated
air. The cooled circulated air is delivered to the air supply hole
118 of the case 110, whereas the high-temperature air generated
during cooling is delivered to the cooler exhaust hole 119. Here,
the amount of the high-temperature air to be discharged through the
cooler exhaust hole 119 is 30% of the total circulated air. The
interior of the regenerative-evaporative cooler 190 is divided into
a dry channel and a wet channel. If a part of the air, passing
through the dry channel, is delivered into the wet channel, the air
is cooled as water is evaporated by the high-temperature surface of
the wet channel, thereby acting to absorb heat from the remaining
higher temperature air passing through the dry channel. Thereby,
the air passing through the dry channel can be cooled to a
dew-point temperature to the maximum extent without an increase of
humidity. The configuration of the regenerative-evaporative cooler
is disclosed in Korea Patent Registration No. 0409265 and thus, a
detailed description thereof will be omitted herein.
[0039] The direct-evaporative cooler 200 is installed in the dry
channel 111 of the case 110 at a position in front of the
regenerative-evaporative cooler 190. The direct-evaporative cooler
200 serves to carry out a secondary cooling operation of the
circulated air from the regenerative-evaporative cooler 190, so as
to supply the resulting air into the conditioning space CS through
the air supply hole 118 of the case 110.
[0040] Hereinafter, the operation and effects of the dehumidifying
cooling device for district heating according to the present
invention will be described in detail with reference to FIGS. 1 to
3.
[0041] FIG. 2 is a view illustrating the flow of air in the
dehumidifying cooling device for district heating according to the
present invention, and FIG. 3 is a graph illustrating the
temperature distribution of humid air used in the dehumidifying
cooling device.
[0042] Explaining first a dehumidifying cooling operation carried
out in the dry channel 111, circulated air from the conditioning
space CS, which is mixed with high-temperature and high-humidity
outside air, is introduced into case 110 through the circulated air
suction hole 117 under the operation of the air supply blower 180.
After passing through the second filter 170, the introduced
circulated air sequentially passes through the dehumidifying wheel
150 such that the moisture contained in the circulated air is
removed by the adsorbent.
[0043] The dehumidified circulated air is heated by adsorptive heat
generated from the surface of the dehumidifying wheel 150. The
resulting high-temperature and low-humidity circulated air passes
through the regenerative-evaporative cooler 190.
[0044] If the circulated air is introduced into the
regenerative-evaporative cooler 190, 70% of the circulated air is
cooled while passing through the regenerative-evaporative cooler
190, and 30% of the circulated air is discharged to the outside
through the cooler exhaust hole 119.
[0045] The circulated air, having passed through the
regenerative-evaporative cooler 190, is secondarily cooled while
passing through the direct-evaporative cooler 200, thereby being
supplied into the conditioning space CS through the air supply hole
118 of the case 110.
[0046] Next, explaining a heat-exchange operation carried out in
the wet channel, high-temperature and high-humidity outside air is
introduced into the first wet channel 112-1 through the outside air
suction hole 115 and passes through the first filter 120 under the
operation of the exhaust blower 160. Then, the filtered outside air
is heat exchanged with the high-temperature and high-humidity
outside air in the second wet channel 112-2 while passing through
the sensible heat exchanger 130. Thereby, the outside air with the
raised temperature passes through the heating coil 140.
[0047] While passing through the heating coil 140, the temperature
of the outside air is further raised by hot water supplied into the
heating coil 140. Thereby, the outside air to be delivered into the
dehumidifying wheel 150 has a significantly raised temperature.
[0048] Then, while passing through the dehumidifying wheel 150
rotating in a state of adsorbing moisture therein, the outside air
forcibly evaporates moisture thereof. Thereafter, the dehumidified
outside air is moved into the second wet channel 112-2 through the
flow hole 114-1. Through the above described process, the surface
of the dehumidifying wheel 150 is returned to an original dried
state thereof, thereby recovering a dehumidifying ability
thereof.
[0049] The high-temperature and high-humidity outside air, moved
into the second wet channel 112-2, is heat exchanged with the
outside air in the first wet channel 112-2 while passing through
the sensible heat exchanger 130, and discharged to the outside
through the exhaust hole 116.
[0050] Referring to FIGS. 2 and 3, in the dehumidifying cooling
device for district heating according to the present invention, if
circulated air {circle around (1)} is introduced into the case, the
circulated air {circle around (1)} is mixed with outside air
{circle around (7)}, to produce mixed air {circle around (2)}
having a raised temperature and absolute humidity. While passing
through the dehumidifying wheel, the mixed air {circle around (2)}
is changed to higher-temperature and lower absolute-humidity air
{circle around (3)}.
[0051] Then, the air {circle around (3)} is heat exchanged to
produce air {circle around (4)} having a rapid drop only in
temperature. In sequence, while passing through the
regenerative-evaporative cooler, the temperature of the air {circle
around (4)} is changed into air {circle around (5)} having a
slightly lowered temperature and slightly raised absolute
humidity.
[0052] Meanwhile, when the introduced outside air {circle around
(7)} passes through the first filter, the filtered air {circle
around (8)} has the same temperature and absolute humidity as those
of the air {circle around (7)}. The air {circle around (8)} is heat
exchanged with the outside air {circle around (11)} in the first
wet channel while passing through the sensible heat exchanger. The
resulting heat exchanged air {circle around (9)} is slightly raised
in temperature, but keeps the same absolute humidity as that of the
air {circle around (8)}. Then, the air {circle around (9)} is
raised only in temperature while passing through the heating coil,
resulting in high-temperature air {circle around (10)}.
[0053] The air {circle around (10)} is dropped in temperature, but
raised in absolute humidity in the course of passing through the
dehumidifying wheel, thereby being changed to low-temperature and
high-humidity air {circle around (11)}. Then, while passing through
the sensible heat exchanger in the second wet channel, the air
{circle around (11)} is heat exchanged with the outside air {circle
around (8)} in the first wet channel such that the heat exchanged
air {circle around (12)}, which is slightly dropped in temperature
but keeps the same absolute humidity as the air {circle around
(11)}, is discharged through the exhaust hole.
[0054] In conclusion, in the dehumidifying cooling device for
district heating according to the present invention, air to be
supplied into a conditioning indoor space is subjected to the
transfer of heat and moisture via a direct contact with the
dehumidifying cooling device. This has the effect of achieving
excellent transfer efficiency and producing and supplying cooling
air with a low-temperature heating source of 60.degree. C. Further,
differently from conventional absorptive devices, the dehumidifying
cooling device is operable in the atmospheric pressure state and
has a simplified configuration, resulting in a considerable
reduction of manufacturing costs.
INDUSTRIAL APPLICABILITY
[0055] As apparent from the above description, a dehumidifying and
cooling device according to the present invention can be installed
to residential and business buildings, etc. using hot water
delivered by district heating facilities, so as to utilize the hot
water as a source for cooling a room.
[0056] Although the preferred embodiments of the present 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.
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