CN212409126U - Refrigerating system - Google Patents
Refrigerating system Download PDFInfo
- Publication number
- CN212409126U CN212409126U CN202021770692.5U CN202021770692U CN212409126U CN 212409126 U CN212409126 U CN 212409126U CN 202021770692 U CN202021770692 U CN 202021770692U CN 212409126 U CN212409126 U CN 212409126U
- Authority
- CN
- China
- Prior art keywords
- pipe
- cavity
- cold water
- generator
- refrigeration system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 41
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000005057 refrigeration Methods 0.000 claims abstract description 36
- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 32
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 27
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 27
- 238000009833 condensation Methods 0.000 claims abstract description 24
- 230000005494 condensation Effects 0.000 claims abstract description 24
- 239000006096 absorbing agent Substances 0.000 claims abstract description 17
- 238000001704 evaporation Methods 0.000 claims abstract description 15
- 230000008020 evaporation Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 9
- 238000009835 boiling Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- NNSUFSQGTTYGCH-UHFFFAOYSA-N [NH3+][Na].[O-][N+]([O-])=O Chemical compound [NH3+][Na].[O-][N+]([O-])=O NNSUFSQGTTYGCH-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a refrigeration system, comprising: the generator is provided with a liquid storage cavity for containing liquid ammonia and sodium nitrate solution, the generator is connected with a heat source, and the upper end of the generator is provided with an exhaust pipe; the condenser is provided with a condensation cavity, and an inlet of the condensation cavity is communicated with the exhaust pipe; the evaporator is provided with an evaporation cavity, and an inlet of the evaporation cavity is communicated with an outlet of the condensation cavity through a liquid inlet pipe; the expansion valve is arranged on the liquid inlet pipe; the absorber is positioned below the generator and is provided with an absorption cavity for containing sodium nitrate solution, the upper part of the absorption cavity is communicated with the outlet of the evaporation cavity through a gas pipe, the absorber is provided with a liquid conveying pipe and a return pipe, and the return pipe is provided with a return pump; the lithium bromide water refrigerator, the cold water output of lithium bromide water refrigerator is provided with first cold water pipe and second cold water pipe, and first cold water union coupling condenser is with the gas in the cooling condensation chamber, and second cold water union coupling absorber is with the sodium nitrate solution in the cooling absorption chamber.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a sodium nitrate-liquid ammonia diffusion type absorption refrigeration system.
Background
There are several absorption refrigeration methods that are currently common: ammonia water absorption type refrigeration and ammonia water absorption diffusion type refrigeration. Although the refrigerating temperature of the ammonia absorption refrigeration can reach minus dozens of degrees, the refrigerating working medium pair is ammonia and water, and both the ammonia and the water can be evaporated during heating, so that not only a rectifying device needs to be additionally arranged, but also the refrigerating efficiency is reduced. The ammonia-hydrogen-water diffusion type refrigeration is characterized in that diffusion gas-hydrogen is added on the basis of ammonia water absorption refrigeration to serve as balance gas, and because the refrigeration working medium pair is still ammonia and water, the defect is similar to that of ammonia water absorption type refrigeration, COP is generally about 0.4, and the large refrigeration requirement is difficult to meet.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a refrigerating system which adopts sodium nitrate and liquid ammonia as a refrigerating working medium pair, simplifies equipment and reduces requirements.
A refrigeration system according to an embodiment of the present invention includes: the generator is provided with a liquid storage cavity for containing liquid ammonia and sodium nitrate solution, the generator is connected with a heat source, and the upper end of the generator is provided with an exhaust pipe; the condenser is provided with a condensation cavity, and an inlet of the condensation cavity is communicated with the exhaust pipe; the evaporator is provided with an evaporation cavity, and an inlet of the evaporation cavity is communicated with an outlet of the condensation cavity through a liquid inlet pipe; the expansion valve is arranged on the liquid inlet pipe; the absorber is positioned below the generator and provided with an absorption cavity for containing sodium nitrate solution, the upper part of the absorption cavity is communicated with the outlet of the evaporation cavity through a gas pipe, the absorber is provided with a liquid conveying pipe and a return pipe, the upper end of the liquid conveying pipe is communicated with the liquid storage cavity, the lower end of the liquid conveying pipe is communicated with the upper part of the absorption cavity, the upper end of the return pipe is communicated with the liquid storage cavity, the lower end of the return pipe extends to the lower part of the absorption cavity, and the return pipe is provided with a return pump; the lithium bromide water refrigerator, the cold water output of lithium bromide water refrigerator is provided with first cold water pipe and second cold water pipe, first cold water union coupling the condenser is in order to cool off the gas in the condensation chamber, second cold water union coupling the absorber is in order to cool off the sodium nitrate solution in the absorption chamber.
The refrigeration system provided by the embodiment of the invention has at least the following beneficial effects: the liquid ammonia-sodium nitrate diffusion type refrigerating device takes sodium nitrate as an absorbent, liquid ammonia as a refrigerant, and the sodium nitrate is a salt, the boiling point of the sodium nitrate is 380 ℃, and the difference between the boiling point of the sodium nitrate and the boiling point of the liquid ammonia is large, so that rectification equipment is omitted, the system is simplified, and the cost is reduced; the constant pressure specific heat is larger, so that the heat exchange area is favorably reduced, the equipment is miniaturized, and the occupied space is reduced; liquid ammonia-sodium nitrate is a relatively ideal absorption refrigeration working medium pair, COP can also reach higher requirements, refrigeration can reach below zero degree, larger refrigeration requirements are met, and a larger application range is provided.
According to some embodiments of the invention, the heat source is a hot water line, the hot water line being above 110 ℃.
According to some embodiments of the invention, the hot water line is provided with a pressure pump.
According to some embodiments of the invention, the first cold water pipe is provided with a coil in the condensation chamber, the coil exchanging heat with the liquid inlet pipe in the condensation chamber.
According to some embodiments of the invention, the expansion valve is an electronic expansion valve.
According to some embodiments of the invention, the fluid line and the return line are split at both ends of the absorber.
According to some embodiments of the invention, an end of the exhaust pipe connected to the condensation chamber is arranged to be bent upward.
According to some embodiments of the invention, the middle part of the gas transmission pipe is arranged to be convex upwards.
According to some embodiments of the invention, the lithium bromide water chiller includes a second generator coupled to the heat source for heating.
According to some embodiments of the invention, the chilled water output of the lithium bromide water chiller is from 7 ℃ to 9 ℃.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a refrigeration system according to some embodiments of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or state relationship referred to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or state relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, some embodiments of the present invention provide a refrigeration system including: a generator 100 having a liquid storage chamber 101 for containing liquid ammonia and sodium nitrate solution, the generator 100 being connected to a heat source 110, the generator 100 being provided at an upper end thereof with an exhaust pipe 102; the condenser 200 is provided with a condensation cavity 201, and an inlet of the condensation cavity 201 is communicated with the exhaust pipe 102; the evaporator 300 is provided with an evaporation cavity 301, and the inlet of the evaporation cavity 301 is communicated with the outlet of the condensation cavity 201 through a liquid inlet pipe 302; an expansion valve 400 disposed on the liquid inlet pipe 302; the absorber 500 is positioned below the generator 100, the absorber 500 is provided with an absorption cavity 501 for containing sodium nitrate solution, the upper part of the absorption cavity 501 is communicated with the outlet of the evaporation cavity 301 through a gas pipe 502, the absorber 500 is provided with a liquid conveying pipe 503 and a return pipe 504, the upper end of the liquid conveying pipe 503 is communicated with the liquid storage cavity 101, the lower end of the liquid conveying pipe 503 is communicated with the upper part of the absorption cavity 501, the upper end of the return pipe 504 is communicated with the liquid storage cavity 101, the lower end of the return pipe 504 extends to the lower part of the absorption cavity 501, the lower end of the return pipe 504 is positioned below the liquid level of the sodium nitrate solution in the absorption; the lithium bromide water refrigerator 600, the cold water output of lithium bromide water refrigerator 600 is provided with first cold water pipe 601 and second cold water pipe 602, first cold water pipe 601 is connected condenser 200 in order to cool the gas in the condensation chamber 201, second cold water pipe 602 is connected absorber 500 in order to cool the sodium nitrate solution in the absorption chamber 501. It is understood that the lithium bromide refrigerator 500 is prior art and will not be described in detail, and the lithium bromide refrigerator 500 can produce cold water at 7 ℃ for cooling the condenser 200 and the absorber 400.
Referring to fig. 1, the refrigeration system operates as follows: heating liquid ammonia and a sodium nitrate solution in a liquid storage cavity 101 by using a heat source 110, heating and evaporating the liquid ammonia to obtain ammonia gas, enabling the ammonia gas to move upwards and enter a condenser 200 through an exhaust pipe 102, enabling the ammonia gas to exchange heat with cold water in a first cold water pipe 501 in the condenser 200 and be condensed to obtain liquid ammonia, enabling the liquid ammonia to flow into a liquid inlet pipe 302, enabling the liquid ammonia to change from high temperature and high pressure into low temperature and low pressure through an expansion valve 400, enabling the liquid ammonia to enter an evaporation cavity 301 of an evaporator 300, enabling the liquid ammonia to be evaporated into the ammonia gas in the evaporation cavity 301; then ammonia gas rises to enter the gas transmission pipe 502, the gas transmission pipe 502 is communicated with the absorption cavity 501, the ammonia gas is absorbed by the sodium nitrate solution in the absorption cavity 501, and in order to ensure the ammonia gas absorption capacity of the sodium nitrate solution, the temperature of the sodium nitrate solution in the absorption cavity 401 is reduced by using cold water of the second cold water pipe 502; the sodium nitrate solution having absorbed ammonia gas is pumped into the liquid storage chamber 101 by the reflux pump 505, and a part of the sodium nitrate solution (liquid ammonia is heated and evaporated) in the liquid storage chamber 101 enters the absorption chamber 501 through the liquid transport tube 503 to form a circulation. The refrigeration system takes sodium nitrate as an absorbent, liquid ammonia as a refrigerant, the sodium nitrate is a salt, the boiling point is 380 ℃, and the boiling point is greatly different from that of the liquid ammonia, so that rectification equipment is omitted, the system is simplified, and the cost is reduced; the constant pressure specific heat is larger, so that the heat exchange area is favorably reduced, the equipment is miniaturized, and the occupied space is reduced; liquid ammonia-sodium nitrate is a relatively ideal absorption refrigeration working medium pair, COP can also reach higher requirements, refrigeration can reach below zero degree, larger refrigeration requirements are met, and a larger application range is provided.
Referring to fig. 1, according to some embodiments of the present invention, the heat source 110 is a hot water pipeline, the hot water pipeline is above 110 ℃, for example, a refinery in petrochemical industry can generate a large amount of condensed steam water at 120 ℃ per hour, and the dewaxing process of the refinery requires refrigeration at-40 ℃ and-20 ℃, and the refrigeration system of the present invention can be used.
Referring to fig. 1, according to some embodiments of the present invention, a hot water pipeline is provided with a pressurizing pump to increase a flow rate and a heating capacity.
Referring to fig. 1, according to some embodiments of the present invention, the first cold water pipe 601 is provided with a coil in the condensation chamber 201, the coil exchanges heat with the liquid inlet pipe 302 in the condensation chamber 201, and the coil increases a contact area to improve cooling capacity for ammonia gas.
Referring to fig. 1, according to some embodiments of the present invention, the expansion valve 400 is an electronic expansion valve 400, which can improve the control accuracy and improve the cooling efficiency.
Referring to fig. 1, according to some embodiments of the present invention, the fluid line 503 and the return line 504 are split at both ends of the absorber 500 to reduce interaction.
Referring to fig. 1, according to some embodiments of the present invention, one end of the exhaust pipe 102 connected to the condensing chamber 201 is bent upward to allow the sodium nitrate solution carried in the ammonia gas to flow back to the liquid storage chamber 101.
Referring to fig. 1, according to some embodiments of the present invention, the middle portion of the gas pipe 502 is provided to be convex upward, so that ammonia gas can be prevented from bringing liquid ammonia into the absorption chamber 501.
Referring to fig. 1, according to some embodiments of the present invention, a lithium bromide water chiller 600 includes a second generator 610, the second generator 610 being coupled to a heat source 110 to achieve heating. The second generator 610 and the generator 100 adopt a common heat source, so that the structure is simplified and the efficiency is improved.
Referring to fig. 1, according to some embodiments of the present invention, the cold water output of the lithium bromide water chiller 600 is 7 ℃ to 9 ℃.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A refrigeration system, comprising:
the generator is provided with a liquid storage cavity for containing liquid ammonia and sodium nitrate solution, the generator is connected with a heat source, and the upper end of the generator is provided with an exhaust pipe;
the condenser is provided with a condensation cavity, and an inlet of the condensation cavity is communicated with the exhaust pipe;
the evaporator is provided with an evaporation cavity, and an inlet of the evaporation cavity is communicated with an outlet of the condensation cavity through a liquid inlet pipe;
the expansion valve is arranged on the liquid inlet pipe;
the absorber is positioned below the generator and provided with an absorption cavity for containing sodium nitrate solution, the upper part of the absorption cavity is communicated with the outlet of the evaporation cavity through a gas pipe, the absorber is provided with a liquid conveying pipe and a return pipe, the upper end of the liquid conveying pipe is communicated with the liquid storage cavity, the lower end of the liquid conveying pipe is communicated with the upper part of the absorption cavity, the upper end of the return pipe is communicated with the liquid storage cavity, the lower end of the return pipe extends to the lower part of the absorption cavity, and the return pipe is provided with a return pump;
the lithium bromide water refrigerator, the cold water output of lithium bromide water refrigerator is provided with first cold water pipe and second cold water pipe, first cold water union coupling the condenser is in order to cool off the gas in the condensation chamber, second cold water union coupling the absorber is in order to cool off the sodium nitrate solution in the absorption chamber.
2. A refrigeration system according to claim 1, wherein said heat source is a hot water line, said hot water line being above 110 ℃.
3. A refrigeration system according to claim 2, wherein the hot water line is provided with a booster pump.
4. A refrigeration system as set forth in claim 1 wherein said first cold water line is provided with a coil in said condensation chamber, said coil being in heat exchange relationship with said liquid inlet line in said condensation chamber.
5. A refrigeration system as recited in claim 1 wherein said expansion valve is an electronic expansion valve.
6. A refrigeration system as set forth in claim 1 wherein said fluid line and said return line are disposed at opposite ends of said absorber.
7. A refrigeration system as recited in claim 1 wherein an end of said exhaust duct connected to said condensation chamber is arranged to be bent upward.
8. The refrigeration system as claimed in claim 1, wherein the middle part of the gas pipe is provided to be upwardly convex.
9. A refrigeration system as recited in claim 1 wherein said lithium bromide water chiller includes a second generator, said second generator being connected to said heat source for heating.
10. A refrigeration system according to claim 9, wherein the chilled water output by the lithium bromide water chiller is from 7 ℃ to 9 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770692.5U CN212409126U (en) | 2020-08-21 | 2020-08-21 | Refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770692.5U CN212409126U (en) | 2020-08-21 | 2020-08-21 | Refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212409126U true CN212409126U (en) | 2021-01-26 |
Family
ID=74371713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021770692.5U Expired - Fee Related CN212409126U (en) | 2020-08-21 | 2020-08-21 | Refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212409126U (en) |
-
2020
- 2020-08-21 CN CN202021770692.5U patent/CN212409126U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210126 |