U.S. patent application number 16/828209 was filed with the patent office on 2020-10-08 for sorption-based subcooler.
The applicant listed for this patent is CARRIER CORPORATION. Invention is credited to Yinshan Feng, Dhruv Chanakya Hoysall, Rajiv Ranjan, Bart Antonie van Hassel, Parmesh Verma.
Application Number | 20200318866 16/828209 |
Document ID | / |
Family ID | 1000004786154 |
Filed Date | 2020-10-08 |
United States Patent
Application |
20200318866 |
Kind Code |
A1 |
Hoysall; Dhruv Chanakya ; et
al. |
October 8, 2020 |
SORPTION-BASED SUBCOOLER
Abstract
A cooling system is provided and includes a compressor, an
expansion valve, a gas cooler through which a refrigerant received
from the compressor passes toward the expansion valve in a
supercritical state, an evaporator interposed between the expansion
valve and the compressor and a vapor sorption subcooling system.
The vapor sorption subcooling system includes a desorber disposed
to remove heat from refrigerant flowing from the gas cooler toward
the expansion valve.
Inventors: |
Hoysall; Dhruv Chanakya;
(West Hartford, CT) ; Feng; Yinshan; (Manchester,
CT) ; Verma; Parmesh; (South Windsor, CT) ;
van Hassel; Bart Antonie; (Weatogue, CT) ; Ranjan;
Rajiv; (South Windsor, CT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CARRIER CORPORATION |
Palm Beach Gardens |
FL |
US |
|
|
Family ID: |
1000004786154 |
Appl. No.: |
16/828209 |
Filed: |
March 24, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
62830924 |
Apr 8, 2019 |
|
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|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F25B 9/08 20130101; F25B
1/06 20130101; F25B 15/10 20130101; F25B 40/02 20130101; F25B 25/02
20130101; F25B 9/008 20130101; F25B 41/062 20130101 |
International
Class: |
F25B 25/02 20060101
F25B025/02; F25B 1/06 20060101 F25B001/06; F25B 9/00 20060101
F25B009/00; F25B 9/08 20060101 F25B009/08; F25B 15/10 20060101
F25B015/10; F25B 40/02 20060101 F25B040/02; F25B 41/06 20060101
F25B041/06 |
Claims
1. A cooling system, comprising: a compressor; an expansion valve;
a gas cooler through which a refrigerant received from the
compressor passes toward the expansion valve in a supercritical
state; an evaporator interposed between the expansion valve and the
compressor; and a vapor sorption subcooling system comprising a
desorber disposed to remove heat from refrigerant flowing from the
gas cooler toward the expansion valve.
2. The cooling system according to claim 1, further comprising an
ejector downstream from the desorber.
3. The cooling system according to claim 1, wherein the vapor
sorption subcooling system comprises a vapor absorption subcooling
system.
4. The cooling system according to claim 3, wherein a subcooling
refrigerant of the vapor absorption subcooling system comprises a
natural, low greenhouse warming potential (GWP), low ozone
depletion potential (ODP) and non-flammable refrigerant.
5. The cooling system according to claim 3, wherein a subcooling
refrigerant of the vapor absorption subcooling system comprises
carbon dioxide.
6. The cooling system according to claim 3, wherein the vapor
absorption subcooling system comprises: a subcooling compressor,
which is receptive of subcooling refrigerant from the desorber; an
absorber for subcooling refrigerant absorption by an absorbent; a
subcooling gas cooler through which the subcooling refrigerant
received from the subcooling compressor passes toward the absorber
in a supercritical state; and a pump configured to pump at least
the absorbent from the desorber to the absorber.
7. The cooling system according to claim 6, wherein the absorbent
comprises an ionic liquid.
8. The cooling system according to claim 1, wherein the vapor
sorption subcooling system comprises a vapor adsorption subcooling
system.
9. The cooling system according to claim 8, wherein a subcooling
refrigerant of the vapor adsorption subcooling system comprises a
natural, low greenhouse warming potential (GWP), low ozone
depletion potential (ODP) and non-flammable refrigerant.
10. The cooling system according to claim 8, wherein a subcooling
refrigerant of the vapor adsorption subcooling system comprises
carbon dioxide.
11. The cooling system according to claim 8, wherein the vapor
adsorption subcooling system comprises: a subcooling compressor,
which is receptive of subcooling refrigerant from the desorber; an
adsorber disposed in parallel with the desorber for subcooling
refrigerant adsorption by an adsorbent; and a subcooling gas cooler
through which the subcooling refrigerant received from the
subcooling compressor passes toward the adsorber and the desorber
in a supercritical state.
12. The cooling system according to claim 11, wherein the adsorbent
comprises a solid adsorbent and the solid adsorbent comprises
activated carbon or a metal organic framework (MOF).
13. The cooling system according to claim 11, wherein two or more
sorption beds are used as adsorbers and desorbers to provide
subcooling
14. A vapor absorption subcooling system, comprising: a desorber in
which a first refrigerant is cooled; a subcooling compressor, which
is receptive of subcooling refrigerant from the desorber; an
absorber for subcooling refrigerant absorption by an absorbent; a
subcooling gas cooler through which the subcooling refrigerant
received from the subcooling compressor passes toward the absorber
in a supercritical state; and a pump configured to pump at least
the absorbent from the desorber to the absorber.
15. The vapor absorption subcooling system according to claim 14,
wherein the subcooling refrigerant comprises at least one or more
of natural, low greenhouse warming potential (GWP), low ozone
depletion potential (ODP), non-flammable refrigerant and carbon
dioxide.
16. The vapor absorption subcooling system according to claim 13,
wherein the absorbent comprises an ionic liquid.
17. A vapor adsorption subcooling system, comprising: a desorber in
which a first refrigerant is cooled; a subcooling compressor, which
is receptive of subcooling refrigerant from the desorber; an
adsorber disposed in parallel with the desorber for subcooling
refrigerant adsorption by an adsorbent; and a subcooling gas cooler
through which the subcooling refrigerant received from the
subcooling compressor passes toward the adsorber and the desorber
in a supercritical state.
18. The vapor adsorption subcooling system according to claim 16,
wherein the subcooling refrigerant comprises at least one of: a
natural, low greenhouse warming potential (GWP), low ozone
depletion potential (ODP) and non-flammable refrigerant; and carbon
dioxide.
19. The vapor adsorption subcooling system according to claim 16,
wherein the adsorbent comprises a solid adsorbent and the solid
adsorbent comprises activated carbon or a metal organic framework
(MOF).
20. The vapor adsorption subcooling system according to claim 16,
wherein: the desorber comprises multiple desorbers, the adsorber
comprises multiple adsorbers, each one of the multiple adsorbers is
paired with a corresponding one of the multiple desorbers to form
respective combined beds, and each of the combined beds is
independently operable at a different adsorption stage.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of Provisional
Application No. 62/830,924 filed Apr. 8, 2019, the disclosure of
which is incorporated herein by reference in its entirety.
BACKGROUND
[0002] The following description relates to chillers and, more
particularly, to sorption-based subcoolers.
[0003] Currently, chillers typically include an ejector for
pressure recovery. In an exemplary case, a compressor compresses a
refrigerant and outputs the refrigerant in superheated form to a
gas cooler and then, in some cases, to an ejector. When an ejector
is provided, the ejector is used for work recovery or pressure
recovery of the refrigerant and can outputs the refrigerant in
cooled form to an evaporator and the compressor.
[0004] Until now, the refrigerant has often been a fluid with
either a high greenhouse warming potential (GWP) characteristic or
a high ozone depletion potential (ODP) characteristic. This is
changing, however, and there is an increasing demand for the use of
natural, non-toxic, low-GWP and ODP refrigerants leading to the use
of carbon dioxide and other similar fluids as refrigerants in
supermarket cooling systems.
[0005] These systems can, in certain cases, have low coefficients
of performance (COP) at high ambient conditions in which the carbon
dioxide moves into supercritical/transcritical fluid zones.
BRIEF DESCRIPTION
[0006] According to an aspect of the disclosure, a cooling system
is provided and includes a compressor, an expansion valve, a gas
cooler through which a refrigerant received from the compressor
passes toward the expansion valve in a supercritical state, an
evaporator interposed between the expansion valve and the
compressor and a vapor sorption subcooling system. The vapor
sorption subcooling system includes a desorber disposed to remove
heat from refrigerant flowing from the gas cooler toward the
expansion valve.
[0007] In accordance with additional or alternative embodiments, an
ejector is downstream from the desorber.
[0008] In accordance with additional or alternative embodiments,
the vapor sorption subcooling system includes a vapor absorption
subcooling system.
[0009] In accordance with additional or alternative embodiments, a
subcooling refrigerant of the vapor absorption subcooling system
includes a natural, low greenhouse warming potential (GWP), low
ozone depletion potential (ODP) and non-flammable refrigerant.
[0010] In accordance with additional or alternative embodiments, a
subcooling refrigerant of the vapor absorption subcooling system
includes carbon dioxide.
[0011] In accordance with additional or alternative embodiments,
the vapor absorption subcooling system includes a subcooling
compressor, which is receptive of subcooling refrigerant from the
desorber, an absorber for subcooling refrigerant absorption by an
absorbent, a subcooling gas cooler through which the subcooling
refrigerant received from the subcooling compressor passes toward
the absorber in a supercritical state and a pump configured to pump
at least the absorbent from the desorber to the absorber.
[0012] In accordance with additional or alternative embodiments,
the absorbent includes an ionic liquid.
[0013] In accordance with additional or alternative embodiments,
the vapor sorption subcooling system includes a vapor adsorption
subcooling system.
[0014] In accordance with additional or alternative embodiments, a
subcooling refrigerant of the vapor adsorption subcooling system
includes a natural, low greenhouse warming potential (GWP), low
ozone depletion potential (ODP) and non-flammable refrigerant.
[0015] In accordance with additional or alternative embodiments, a
subcooling refrigerant of the vapor adsorption subcooling system
includes carbon dioxide.
[0016] In accordance with additional or alternative embodiments,
the vapor adsorption subcooling system includes a subcooling
compressor, which is receptive of subcooling refrigerant from the
desorber, an adsorber disposed in parallel with the desorber for
subcooling refrigerant adsorption by an adsorbent and a subcooling
gas cooler through which the subcooling refrigerant received from
the subcooling compressor passes toward the adsorber and the
desorber in a supercritical state.
[0017] In accordance with additional or alternative embodiments,
the adsorbent includes a solid adsorbent and the solid adsorbent
includes activated carbon or a metal organic framework (MOF).
[0018] According to an aspect of the disclosure, a vapor absorption
subcooling system is provided and includes a desorber in which a
first refrigerant is cooled, a subcooling compressor, which is
receptive of subcooling refrigerant from the desorber, an absorber
for subcooling refrigerant absorption by an absorbent, a subcooling
gas cooler through which the subcooling refrigerant received from
the subcooling compressor passes toward the absorber in a
supercritical state and a pump configured to pump at least the
absorbent from the desorber to the absorber.
[0019] In accordance with additional or alternative embodiments,
the subcooling refrigerant includes a natural, low greenhouse
warming potential (GWP), low ozone depletion potential (ODP) and
non-flammable refrigerant.
[0020] In accordance with additional or alternative embodiments,
the subcooling refrigerant includes carbon dioxide.
[0021] In accordance with additional or alternative embodiments,
the absorbent includes an ionic liquid.
[0022] According to another aspect of the disclosure, a vapor
adsorption subcooling system is provided and includes a desorber in
which a first refrigerant is cooled, a subcooling compressor, which
is receptive of subcooling refrigerant from the desorber, an
adsorber disposed in parallel with the desorber for subcooling
refrigerant adsorption by an adsorbent and a subcooling gas cooler
through which the subcooling refrigerant received from the
subcooling compressor passes toward the adsorber and the desorber
in a supercritical state.
[0023] In accordance with additional or alternative embodiments,
the subcooling refrigerant includes a natural, low greenhouse
warming potential (GWP), low ozone depletion potential (ODP) and
non-flammable refrigerant.
[0024] In accordance with additional or alternative embodiments,
the subcooling refrigerant includes carbon dioxide.
[0025] In accordance with additional or alternative embodiments,
the adsorbent includes a solid adsorbent and the solid adsorbent
includes activated carbon or a metal organic framework (MOF).
[0026] In accordance with additional or alternative embodiments,
the desorber includes multiple desorbers, the adsorber includes
multiple adsorbers, each one of the multiple adsorbers is paired
with a corresponding one of the multiple desorbers to form
respective combined beds and each of the combined beds is
independently operable at a different adsorption stage.
[0027] These and other advantages and features will become more
apparent from the following description taken in conjunction with
the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The subject matter, which is regarded as the disclosure, is
particularly pointed out and distinctly claimed in the claims at
the conclusion of the specification. The foregoing and other
features, and advantages of the disclosure are apparent from the
following detailed description taken in conjunction with the
accompanying drawings in which:
[0029] FIG. 1 is a schematic diagram illustrating a vapor
absorption subcooling system of a cooling system in accordance with
embodiments;
[0030] FIG. 2 is a graphical depiction of a coefficient of
performance capability of the vapor absorption subcooling system of
the cooling system of FIG. 1;
[0031] FIG. 3 is a schematic diagram illustrating a vapor
adsorption subcooling system of a cooling system in accordance with
embodiments;
[0032] FIG. 4 is a schematic diagram showing another embodiment of
a vapor adsorption subcooling system of a cooling system in which
the vapor adsorption subcooling system has more than two sorption
beds operating at different stages of adsorption and desorption in
accordance with embodiments; and
[0033] FIG. 5 is a schematic diagram of a controller of the cooling
systems of at least the embodiments of FIGS. 1, 3 and 4.
[0034] These and other advantages and features will become more
apparent from the following description taken in conjunction with
the drawings.
DETAILED DESCRIPTION
[0035] As will be described below, a cooling system for use in a
supermarket cooling system, for example, is provided and uses a
natural, non-toxic, low-GWP and ODP refrigerant. This refrigerant
can be carbon dioxide, which is paired with an absorbent, such as
one or more ionic liquids, or a solid adsorbent. The cooling system
includes a gas cooler, a vapor absorption/adsorption-based
subcooler and a desorber component that provides subcooling to
refrigerant exiting the gas cooler. In the particular case of the
refrigerant being carbon dioxide and the absorbent being an ionic
liquid, the ionic liquid absorbs the carbon dioxide in an
exothermic process in which the heat of absorption is rejected to
ambient in order to sustain absorption processes (this is similar
to the heat of compression needing to be rejected to ambient in a
conventional gas cooler).
[0036] With reference to FIG. 1, a cooling system 101 is provided.
The cooling system 101 includes a first, low temperature compressor
110 and a second, high temperature compressor 111. The first, low
temperature compressor is configured to compress low temperature
refrigerant and to output compressed refrigerant to the second,
high temperature compressor 111. The second, high temperature
compressor 111 is configured to compress high temperature
refrigerant and the compressed refrigerant received from the first,
low temperature compressor into compressed or supercritical
refrigerant. The cooling system 101 further includes a gas cooler
120, which is disposed downstream from the second, high temperature
compressor 111 and which is receptive of the compressed or
supercritical refrigerant from the second, high temperature
compressor 111. Within the gas cooler 120, the compressed or
supercritical refrigerant is cooled slightly before flowing through
a desorber 160, an ejector 155 and first and second expansion
valves 131 and 132 toward a first, low temperature evaporator 140,
which is associated with and upstream from the first, low
temperature compressor 110, or through the first expansion valve
131 toward a second, high temperature evaporator 141, which is
associated with and upstream from the second, high temperature
compressor 111.
[0037] The cooling system 101 also includes a vapor sorption
subcooling system 150. The vapor sorption subcooling system 150 can
be provided as a vapor absorption subcooling system 151 and
includes the desorber 160, which is disposed between the gas cooler
120 and the first and second expansion valves 131 and 132 and which
is configured to remove heat from the refrigerant flowing from the
gas cooler 120 toward the first and second expansion valves 131 and
132. A subcooling refrigerant of the vapor absorption subcooling
system 151 can include a natural, low greenhouse warming potential
(GWP), low ozone depletion potential (ODP) and non-flammable
refrigerant. More particularly, the subcooling refrigerant of the
vapor absorption subcooling system 151 can include carbon
dioxide.
[0038] The cooling system 101 can further include the ejector 155
disposed downstream from the desorber 160. The cooling system 101
in such cases would have subcooling capability from the vapor
sorption subcooling system 150 and pressure recovery using the
ejector 155. This would result in the cooling system 101 having
increased COPs. It is to be understood that the ejector 155 is
optional and that embodiments exist in which the ejector 155 is not
present in the cooling system 101.
[0039] As shown in FIG. 1, in addition to the desorber 160, the
vapor absorption subcooling system 151 includes a subcooling
compressor 170, which is receptive of subcooling refrigerant from
the desorber 160, an absorber 180 for subcooling refrigerant
absorption by an absorbent 182, a subcooling gas cooler 190 through
which the subcooling refrigerant that is received from the
subcooling compressor 170 passes toward the absorber 180 in a
supercritical state and a pump 200. The vapor absorption subcooling
system 151 further includes a first valve 210, which is disposed
immediately downstream from the subcooling gas cooler 190 and
immediately upstream from the absorber 180, and a second valve 211,
which is disposed immediately downstream from the absorber 180 and
immediately upstream from the desorber 160.
[0040] The absorber 180 includes an enclosure 181 and the absorbent
182, which is contained within the enclosure 181. In accordance
with embodiments, the absorbent 182 may include an ionic liquid
(see below for example of ionic liquids). While this absorbent 182
(i.e., ionic liquid) is contained within the enclosure 181, it can
be used to dissolve the subcooling refrigerant (i.e., carbon
dioxide).
TABLE-US-00001 TABLE 1 Literature values of CO2 absorption by ionic
liquids Desorption Absorption Temperature Pressure Temperature
Pressure Delta Cation Anion [K] [bar] xCO2 [K] [bar] xCO2 xCO2
[BMIM]+ [BF4]- 293.65 41 0.458 313.35 105 0.61 0.152 [BMIM]+ [BF4]-
298.2 42.1 0.4902 313.3 84.02 0.5289 0.0387 [BMIM]+ [PF6]- 298.2 42
0.4905 313.3 84.01 0.5941 0.1036 [BMIM]+ [PF6]- 298.2 42 0.4905
313.3 95.47 0.5991 0.1086 [BMIM]+ [Tf2N]- 298.2 44.27 0.6181 313.3
110.25 0.742 0.1239 [BMIM]+ [SCN]- 303.15 37.5 0.345 313.15 122.5
0.422 0.077 [BMIM]+ [C(CN)3]- 303.15 37.9 0.502 313.15 104.6 0.633
0.131 [HMIM]+ [Tf2N]- 298.2 42.34 0.6282 313.3 97.92 0.7478 0.1196
[HMIM]+ [BF4]- 303.63 49.1 0.498 313.07 104.6 0.602 0.104 [HMIM]+
[PF6]- 303.48 33.7 0.41 318.11 93.4 0.599 0.189 [EMIM]+ [Tf2N]-
298.15 32.54 0.533 323.15 100.81 0.711 0.178 [EMIM]+ [Tf2N]- 293.05
43 0.6448 314.05 90.5 0.7043 0.0595 [EMIM]+ [Tf2N]- 298.15 38.72
0.619 323.15 102.81 0.701 0.082
[0041] Where the absorbent 182 includes an ionic liquid, the ionic
liquid can be immobilized in an adsorbent. In such cases, the vapor
absorption subcooling system 151 is similar to an adsorption system
(to be discussed below) where pores of an adsorbent are filled with
the ionic liquid (sometimes referred to as an immobilized ionic
liquid).
[0042] During an operation of the vapor absorption subcooling
system 151, the desorber 160 provides subcooling to the refrigerant
exiting the gas cooler 120. This is accomplished as follows.
[0043] Within the absorber 180, the subcooling refrigerant flowing
into the absorber 180 from the subcooling gas cooler 190 is
absorbed into the absorbent 182 (i.e., absorption by the subcooling
refrigerant being dissolved into the absorbent 182 within the
enclosure 182) as part of an exothermic process. The heat of
absorption gets rejected to ambient. The absorbent 182 with the
subcooling refrigerant absorbed therein flows through the second
valve 211 to the desorber 160, which is at a lower pressure than
the absorber 180. Within the desorber 160, the subcooling
refrigerant desorbs from the absorbent 182 in an endothermic
process and provides cooling through a heat transfer surface to the
refrigerant flowing from the gas cooler 120. The subcooling
refrigerant that desorbs is recompressed by the subcooling
compressor 170. At least the absorbent 182 or a mixture of the
absorbent 182 and a portion of the subcooling refrigerant is pumped
back into the absorber 180 in order to complete the cycle by the
pump 200.
[0044] In accordance with embodiments, the absorber 180 and the
desorber 160 can be operated in a cyclic mode.
[0045] As shown in FIG. 2, the cooling system 101 in combination
with the vapor absorption subcooling system 151 has a high COP due
to the high heat of desorption which can be 1-10 times higher than
the heat of vaporization depending on the absorbent. In particular,
with an ionic liquid as the absorbent 182, a subcooler cycle of the
vapor absorption subcooling system 151 subcools the refrigerant by
about 15.degree. C. and operates between 4-7 MPa.
[0046] With reference to FIG. 3, the cooling system 101 is provided
with the vapor sorption system 150. Here, the vapor sorption
subcooling system 150 can be provided as a vapor adsorption
subcooling system 301 and includes the desorber 160, which is
disposed between the gas cooler 120 and the first expansion valve
131 and which is configured to remove heat from the refrigerant
flowing from the gas cooler 120 toward the first and second
expansion valves 131 and 132. A subcooling refrigerant of the vapor
adsorption subcooling system 301 can include a natural, low
greenhouse warming potential (GWP), low ozone depletion potential
(ODP) and non-flammable refrigerant. More particularly, the
subcooling refrigerant of the vapor adsorption subcooling system
301 can include carbon dioxide.
[0047] As shown in FIG. 3, in addition to the desorber 160, the
vapor adsorption subcooling system 301 includes the subcooling
compressor 170, which is receptive of subcooling refrigerant from
the desorber 160, an adsorber 310 for subcooling refrigerant
adsorption by an adsorbent 312, a subcooling gas cooler 190 through
which the subcooling refrigerant that is received from the
subcooling compressor 170 passes toward the adsorber 310 in a
supercritical state and a valve system 320. The valve system 320
includes first and second valves 321 and 322, which are
respectively disposed upstream from the adsorber 310 and the
desorber 160 and which respectively control subcooling refrigerant
flows into the adsorber 310 and the desorber 160, as well as third,
fourth and fifth valves 323, 324 and 325, which are respectively
downstream from the adsorber 310 and the desorber 160 and which are
respectively configured to control flows of the subcooling
refrigerant to the subcooling compressor 170.
[0048] Within the adsorber 310, the subcooling refrigerant flowing
into the adsorber 310 from the subcooling gas cooler 190 is
adsorbed into the adsorbent 312 as part of an exothermic process.
The heat of adsorption gets rejected to ambient.
[0049] In accordance with embodiments, adsorption and desorption
beds of the adsorber 310 and the desorber 160, respectively, can be
operated in a cyclic mode. In addition, the adsorber 310 can
include two or more adsorbent beds.
[0050] The adsorber 310 includes an enclosure 311 and a solid
adsorbent 312 contained within the enclosure 311. In accordance
with some embodiments, the solid adsorbent 312 can include or be
provided as activated carbon and metal organic frameworks
(MOFs).
[0051] With reference to FIG. 4 and in accordance with further
embodiments, the cooling system 101 is provided with the vapor
sorption system 150 and the vapor sorption subcooling system 150
can be provided as a vapor adsorption subcooling system 501. The
vapor adsorption subcooling system 501 is similar to the vapor
adsorption subcooling system 301 but is characterized in that the
desorber 160 includes multiple desorbers 160, the adsorber 180
includes multiple adsorbers 180 and each one of the multiple
adsorbers 180 is paired with a corresponding one of the multiple
desorbers 160 in respective desorber/adsorber beds 4101, 4102 and
4103 that are fed by valve system 420.
[0052] The respective desorber/adsorber beds 4101, 4102 and 4103
are operable at different stages of adsorption and desorption to
mitigate a potential issue of intermittency in which the desorber
160 switches from desorption mode to adsorption mode. With the
presence of the multiple desorbers 160, cooling loads can be
maintained by having the different multiple desorbers 160 at
different stages of desorption. As one of the multiple desorbers
160 switches from desorption mode to adsorption mode, the other of
the multiple desorbers 160 are available to provide cooling effects
to satisfy extra cooling requirements.
[0053] With reference to FIG. 5 and in accordance with further
embodiments, a controller 501 can be provided to control various
components of the cooling system 101 of at least the embodiments of
FIGS. 1, 3 and 4. The controller 501 can include a processing unit
510, a memory unit 520, a networking unit 530, a servo control unit
540 and an input/output (I/O) bus 550 by which the processing unit
510, the memory unit 520, the networking unit 530 and the servo
control unit 540 are communicative. The networking unit 530 is
configured to enable communications between the processing unit 510
and various sensing elements disposable throughout the cooling
system 101 as well as external computing systems. The servo control
unit 540 is responsive to instructions issued by the processing
unit 510 to thereby control operations of the first and second
expansion valves 131 and 132, the first and second valves 210 and
211 of the embodiments of FIG. 1, the pump 200 of the embodiments
of FIG. 1, the valve system 320 of FIG. 3 and the valve system 420
of FIG. 4. The memory unit 520 has executable instructions stored
thereon, which are readable and executable by the processing unit
510 such that, when the executable instructions are read and
executed by the processing unit 510, the executable instructions
cause the processing unit 510 to generate and issue the commands to
the servo control unit 540.
[0054] Technical effects and benefits of the features described
herein are the provision of a vapor sorption subcooling system that
uses a natural, low ODP, low GWP, non-flammable refrigerant like
carbon dioxide for the subcooler system that, when combined with a
current cooling system, shows 10% increase in COP.
[0055] While the disclosure is provided in detail in connection
with only a limited number of embodiments, it should be readily
understood that the disclosure is not limited to such disclosed
embodiments. Rather, the disclosure can be modified to incorporate
any number of variations, alterations, substitutions or equivalent
arrangements not heretofore described, but which are commensurate
with the spirit and scope of the disclosure. Additionally, while
various embodiments of the disclosure have been described, it is to
be understood that the exemplary embodiment(s) may include only
some of the described exemplary aspects. Accordingly, the
disclosure is not to be seen as limited by the foregoing
description, but is only limited by the scope of the appended
claims.
* * * * *