CN112747495B - Double-effect and two-stage composite lithium bromide absorption type water chilling unit - Google Patents
Double-effect and two-stage composite lithium bromide absorption type water chilling unit Download PDFInfo
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- CN112747495B CN112747495B CN202110159622.9A CN202110159622A CN112747495B CN 112747495 B CN112747495 B CN 112747495B CN 202110159622 A CN202110159622 A CN 202110159622A CN 112747495 B CN112747495 B CN 112747495B
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- pressure generator
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 120
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000006096 absorbing agent Substances 0.000 claims abstract description 59
- 239000003507 refrigerant Substances 0.000 claims abstract description 35
- 239000000498 cooling water Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims 2
- 239000002351 wastewater Substances 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 6
- 239000002918 waste heat Substances 0.000 abstract description 4
- 150000001875 compounds Chemical group 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to a double-effect and two-stage composite lithium bromide absorption type water chilling unit which comprises an evaporator, an absorber, a two-stage low-pressure generator, a high-pressure absorber, a two-stage high-pressure generator, a condenser, a first heat exchanger, a second heat exchanger, a refrigerant pump, a first solution pump, a second solution pump, a third solution pump, a fourth solution pump, a third heat exchanger, a double-effect low-temperature heat exchanger, a double-effect high-pressure generator and a double-effect low-pressure generator. In the first-stage solution concentration process of the two-stage absorption two-stage generation refrigeration cycle, the double-effect refrigeration solution concentration process is connected in series, so that the unit can realize two-stage absorption two-stage generation refrigeration by using a low-temperature heat source alone, can realize double-effect refrigeration by using a high-temperature heat source alone, can realize refrigeration by using a low-temperature heat source and a high-temperature heat source simultaneously, and can realize refrigeration stability under the condition of fully utilizing low-temperature waste heat and saving energy.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a double-effect and two-stage composite lithium bromide absorption type water chilling unit.
Background
As shown in fig. 1, a conventional two-stage absorption two-stage generation type lithium bromide absorption chiller (hereinafter referred to as a two-stage chiller) is composed of an evaporator 1, an absorber 2, a two-stage low-pressure generator 3, a high-pressure absorber 4, a two-stage high-pressure generator 5, a condenser 6, a first heat exchanger 7, a second heat exchanger 8, a refrigerant pump 9, a first solution pump 10, a second solution pump 11, a third solution pump 12, a control system (not shown in the figure), and pipes and valves connecting the respective components. Cold water flows through the evaporator 1 to cool; the cooling water flows through the absorber 2, the high-pressure absorber 4 and the condenser 6 to raise the temperature; the low-temperature source flows through the two-stage low-pressure generator 3 and the two-stage high-pressure generator 5, and releases heat to heat the concentrated lithium bromide solution. When the two-stage unit operates, the refrigerant water pumped by the refrigerant pump 9 and sprayed from the top of the evaporator 1 absorbs heat of cold water flowing through the heat transfer pipe of the evaporator 1, and the heat is vaporized into refrigerant steam and then enters the absorber 2 to be absorbed by the first-stage lithium bromide solution (the heat released when absorbing the refrigerant steam is taken away by the cooling water flowing through the heat transfer pipe of the absorber 2); the concentration of the first-stage lithium bromide solution in the absorber 2 becomes thin after absorbing the refrigerant steam, the first-stage lithium bromide solution is pumped out by the first solution pump 10, enters the two-stage low-pressure generator 3 after heat exchange and temperature rise by the first heat exchanger 7, and is heated and concentrated by a low-temperature heat source; the concentrated solution is pumped by a second solution pump 11 and returns to the absorber 2 after being subjected to heat exchange and temperature reduction by the first heat exchanger 7, and the concentrated refrigerant steam enters the high-pressure absorber 4 and is absorbed by the second-stage lithium bromide solution (the heat released when absorbing the refrigerant steam is taken away by cooling water flowing through the heat transfer pipe of the high-pressure absorber 4); the concentration of the second-stage lithium bromide solution in the high-pressure absorber 4 becomes thin after absorbing the refrigerant steam, the second-stage lithium bromide solution is pumped by the third solution pump 12, enters the two-stage high-pressure generator 5 after being heated and concentrated by a low-temperature heat source in the second-stage high-pressure generator, the concentrated second-stage lithium bromide solution returns to the high-pressure absorber 4 after being cooled by the second heat exchanger 8, and the concentrated refrigerant steam enters the condenser 6 and returns to the evaporator 1 after being cooled and condensed by cooling water.
The two-stage type unit can utilize a low-temperature heat source with very low temperature to refrigerate, thereby realizing energy conservation. However, such low temperature heat sources for users are often not stable, thus resulting in unstable refrigeration, thereby limiting their use. If a unit can utilize low-temperature heat sources to perform two-stage absorption two-stage refrigeration, energy is saved, and high-grade heat sources can be supplemented to perform double-effect refrigeration when the low-temperature heat sources are insufficient so as to maintain the stability of refrigeration, the application of the unit for refrigerating by utilizing low-temperature waste heat is greatly improved.
Disclosure of Invention
The invention aims to solve the problem of unstable refrigeration caused by unstable low-temperature waste heat source and ensure the stable refrigeration capacity of the water chilling unit.
The purpose of the invention is realized in the following way:
The purpose of the invention is realized in the following way: a double-effect and two-stage composite lithium bromide absorption chiller (hereinafter referred to as composite chiller), comprising: the device comprises an evaporator, an absorber, a two-stage low-pressure generator, a high-pressure absorber, a two-stage high-pressure generator, a condenser, a first heat exchanger, a second heat exchanger, a refrigerant pump, a first solution pump, a second solution pump, a third solution pump, a fourth solution pump, a third heat exchanger, a double-effect low-temperature heat exchanger, a double-effect high-pressure generator and a double-effect low-pressure generator. The composite unit is characterized in that a fourth solution pump, a third heat exchanger, a double-effect low-temperature heat exchanger, a double-effect high-pressure generator and a double-effect low-pressure generator are added on the existing two-stage unit, and the newly added components are a double-effect refrigerating solution concentration flow which is connected in series in the process of the first-stage solution concentration flow of the existing two-stage unit from the two-stage low-pressure generator to the absorber, namely, double-effect refrigerating by using a high-temperature heat source is realized through the newly added components. When refrigeration occurs only by two-stage absorption and two-stage absorption of the low-temperature heat source driving unit, the newly added part is not put into operation, and the concentrated first-stage lithium bromide solution in the two-stage low-pressure generator directly returns to the absorber through the first heat exchanger; when a high-temperature heat source is used for driving the unit to perform double-effect refrigeration, the second solution pump is stopped, the newly added fourth solution pump is started, and the first lithium bromide solution enters a series double-effect refrigeration solution concentration process, namely: the fourth solution pump pumps out the first-stage lithium bromide solution in the two-stage low-pressure generator, and sends the solution into the double-effect high-pressure generator and the double-effect low-pressure generator through the double-effect low-temperature heat exchanger and the double-effect high-temperature heat exchanger, the high-temperature heat source heats and concentrates the lithium bromide solution in the double-effect high-pressure generator, the concentrated high-temperature refrigerant steam enters the lithium bromide solution in the double-effect low-pressure generator, the concentrated lithium bromide solution in the double-effect high-pressure generator and the double-effect low-pressure generator returns to the absorber through the double-effect low-temperature heat exchanger and the double-effect high-temperature heat exchanger, the high-temperature refrigerant steam concentrated by the lithium bromide solution in the double-effect high-pressure generator heats the solution in the double-effect low-pressure generator, releases heat and condenses and then enters the condenser, the refrigerant steam concentrated by the double-effect low-pressure generator also enters the condenser, and the two paths of refrigerant steam (refrigerant water) is cooled and condensed in the condenser and returns to the evaporator.
The beneficial effects of the invention are as follows:
Compared with the existing two-stage unit, the double-effect refrigeration solution concentration process is connected in series in the first-stage lithium bromide solution concentration process by the new component. When the newly added component is not added for operation, the newly added component can drive the compound unit to perform two-stage absorption and two-stage refrigeration by using low-temperature waste heat alone, so that energy conservation is realized; when the newly added components are added for operation, the double-effect refrigeration device can independently drive the compound unit by using a high-temperature heat source, and can simultaneously drive the compound unit by using two energy sources for refrigeration, thereby realizing energy conservation and simultaneously ensuring the stability of refrigeration.
Drawings
Fig. 1 is a working schematic diagram of a conventional two-stage absorption two-stage generation type lithium bromide absorption water chilling unit.
Fig. 2 shows a first application example of the double-effect and two-stage composite lithium bromide absorption chiller according to the present invention.
Fig. 3 shows a second application example of the double-effect and two-stage composite lithium bromide absorption chiller according to the present invention.
Fig. 4 shows a third application example of the double-effect and two-stage composite lithium bromide absorption chiller according to the present invention.
Fig. 5 shows a fourth application example of the double-effect and two-stage composite lithium bromide absorption chiller according to the present invention.
Reference numerals in the drawings:
The evaporator 1, the absorber 2, the two-stage low-pressure generator 3, the high-pressure absorber 4, the two-stage high-pressure generator 5, the condenser 6, the first heat exchanger 7, the second heat exchanger 8, the refrigerant pump 9, the first solution pump 10, the second solution pump 11, the third solution pump 12, the fourth solution pump 13, the third heat exchanger 14, the double-effect low-temperature heat exchanger 15, the double-effect high-temperature heat exchanger 16, the double-effect high-pressure generator 17, the double-effect low-pressure generator 18, the cold water inlet A1, the cold water outlet A2, the cooling water inlet B1, the cooling water outlet B2, the low-temperature heat source inlet C1, the low-temperature heat source outlet C2, the high-temperature heat source inlet D1 and the high-temperature heat source outlet D2.
Detailed Description
Fig. 2 is a diagram showing an application example of a double-effect and two-stage composite lithium bromide absorption chiller (hereinafter referred to as a chiller) according to the present invention, which is composed of an evaporator 1, an absorber 2, a two-stage low-pressure generator 3, a high-pressure absorber 4, a two-stage high-pressure generator 5, a condenser 6, a first heat exchanger 7, a second heat exchanger 8, a refrigerant pump 9, a first solution pump 10, a second solution pump 11, a third solution pump 12, a fourth solution pump 13, a third heat exchanger 14, a double-effect low-temperature heat exchanger 15, a double-effect high-temperature heat exchanger 16, a double-effect high-pressure generator 17, a double-effect low-pressure generator 18, and a control system (not shown in the figure), and pipes and valves connecting the respective components.
Cold water flows through the evaporator 1, cooling water flows through the absorber 2, the high-pressure absorber 4 and the condenser 6 in parallel, the low-temperature heat source flows through the two-stage low-pressure generator 3 and the two-stage high-pressure generator 5, and the high-temperature heat source flows through the double-effect high-pressure generator 17. When the unit operates, the refrigerant water pumped by the refrigerant pump 9 and sprayed from the top of the evaporator 1 absorbs heat of cold water flowing through the heat transfer pipe of the evaporator 1, and the heat is vaporized into refrigerant steam and then enters the absorber 2 to be absorbed by the first-stage lithium bromide solution (the heat released when absorbing the refrigerant steam is taken away by the cooling water flowing through the heat transfer pipe of the absorber 2); the concentration of the first-stage lithium bromide solution in the absorber 2 becomes thin after absorbing the refrigerant steam, the solution is pumped out by the first solution pump 10, enters the two-stage low-pressure generator 3 after heat exchange and temperature rise through the first heat exchanger 7 and the third heat exchanger 14, is heated and concentrated by a low-temperature heat source, and the concentrated solution is pumped out by the second solution pump 11 or the fourth solution pump 13. When two-stage absorption and two-stage refrigeration of the single low-temperature heat source driving unit occurs, the concentrated first-stage lithium bromide solution is pumped out by the second solution pump 11 and returns to the absorber 2 after heat exchange and temperature reduction by the first heat exchanger 7; when the high-temperature heat source driving unit double-effect refrigeration exists, the second solution pump 11 is stopped, the concentrated first-stage lithium bromide solution is pumped out by the fourth solution pump 13, and enters the double-effect high-pressure generator 17 and the double-effect low-pressure generator 18 after being subjected to heat exchange and temperature rise through the double-effect high-temperature heat exchanger 16 and the double-effect low-temperature heat exchanger 15 respectively, the concentrated high-temperature refrigerant steam enters the lithium bromide solution in the double-effect low-pressure generator 18 again after being heated and concentrated by the high-temperature heat source, the concentrated lithium bromide solution in the double-effect high-pressure generator 17 returns to the absorber 2 through the double-effect high-temperature heat exchanger 16 and the third heat exchanger 14, and the concentrated lithium bromide solution in the double-effect low-pressure generator 18 returns to the absorber 2 through the double-effect low-temperature heat exchanger 15 and the third heat exchanger 14. The high-temperature refrigerant steam concentrated by the lithium bromide solution in the double-effect high-pressure generator 17 heats the solution in the double-effect low-pressure generator 18, releases heat and condenses, and then enters the condenser 6, the refrigerant steam concentrated in the double-effect low-pressure generator 18 also enters the condenser 6, and the two paths of refrigerant steam (refrigerant water) are cooled and condensed by cooling water in the condenser 6 and then return to the evaporator 1. The refrigerant vapor concentrated by the first-stage lithium bromide solution in the two-stage low-pressure generator 3 enters the high-pressure absorber 4 and is absorbed by the second-stage lithium bromide solution (the heat released when absorbing the refrigerant vapor is taken away by cooling water flowing through the heat transfer pipe of the high-pressure absorber 4); the concentration of the lithium bromide solution in the high-pressure absorber 4 becomes thin after absorbing the refrigerant steam, the lithium bromide solution is pumped out by the third solution pump 12, enters the two-stage high-pressure generator 5 after being heated by the second heat exchanger 8, is heated and concentrated by the low-temperature heat source, the concentrated lithium bromide solution returns to the high-pressure absorber 4 after being cooled by the second heat exchanger 8, and the concentrated refrigerant steam enters the condenser 6 and also returns to the evaporator 1 after being cooled and condensed by the cooling water; without the cryogenic heat source, the third solution pump 12 is stopped and the unit is only double-effect cooled.
In the double-effect and two-stage composite lithium bromide absorption chiller shown in fig. 2, the first-stage lithium bromide solution pumped by the fourth solution pump 13 is divided into two paths, one path of solution enters the double-effect high-temperature heat exchanger 16 into the double-effect high-pressure generator 17, and after being concentrated, the solution returns to the absorber 2 through the double-effect high-temperature heat exchanger 16 and the third heat exchanger 14; the other path enters the double-effect low-pressure generator 18 through the double-effect low-temperature heat exchanger 15, and returns to the absorber 2 through the double-effect low-temperature heat exchanger 15 and the third heat exchanger 14 after being concentrated.
As shown in fig. 3, the first-stage lithium bromide solution pumped by the fourth solution pump 13 may flow through the third heat exchanger 14, then flow through the double-effect high-temperature heat exchanger 16 and the double-effect low-temperature heat exchanger 15, enter the double-effect high-pressure generator 17 and the double-effect low-pressure generator 18, and flow back to the absorber 2 through the double-effect high-temperature heat exchanger 16 and the double-effect low-temperature heat exchanger 15 after being concentrated.
As shown in fig. 4, the first-stage lithium bromide solution pumped by the fourth solution pump 13 flows through the double-effect low-temperature heat exchanger 15 and the double-effect high-temperature heat exchanger 16 in series, then enters the double-effect high-pressure generator 17, is concentrated, then enters the double-effect low-pressure generator 18 through the double-effect high-temperature heat exchanger 16, and finally returns to the absorber 2 through the double-effect low-temperature heat exchanger 15 and the third heat exchanger 14.
As shown in fig. 5, the first-stage lithium bromide solution pumped by the fourth solution pump 13 flows through the third heat exchanger 14, flows through the double-effect low-temperature heat exchanger 15 and the double-effect high-temperature heat exchanger 16 in series, enters the double-effect high-pressure generator 17, flows through the double-effect high-temperature heat exchanger 16 after being concentrated, enters the double-effect low-pressure generator 18 after being concentrated, and returns to the absorber 2 directly through the double-effect low-temperature heat exchanger 15 after being concentrated again.
In the double-effect and two-stage composite lithium bromide absorption chiller shown in fig. 2, 3,4 and 5, the cooling water flows through the absorber 2, the high-pressure absorber 4 and the condenser 6 in parallel, and may also flow through the absorber 2, the high-pressure absorber 4 and the condenser 6 in series or in series-parallel in any order.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.
Claims (3)
1. A double-effect and two-stage composite lithium bromide absorption type water chilling unit is characterized in that: the device comprises an evaporator (1), an absorber (2), a two-stage low-pressure generator (3), a high-pressure absorber (4), a two-stage high-pressure generator (5), a condenser (6), a first heat exchanger (7), a second heat exchanger (8), a refrigerant pump (9), a first solution pump (10), a second solution pump (11), a third solution pump (12), a fourth solution pump (13), a third heat exchanger (14), a double-effect low-temperature heat exchanger (15), a double-effect high-temperature heat exchanger (16), a double-effect high-pressure generator (17) and a double-effect low-pressure generator (18);
the first solution pump (10) pumps out the first-stage lithium bromide solution in the absorber (2), and sends the first-stage lithium bromide solution into the two-stage low-pressure generator (3) through the first heat exchanger (7) and the third heat exchanger (14) for heating and concentrating, and the concentrated solution is pumped out by the second solution pump (11) or the fourth solution pump (13);
The lithium bromide solution extracted by the second solution pump (11) is returned to the absorber (2) through the first heat exchanger (7);
The first-stage lithium bromide solution extracted by the fourth solution pump (13) is divided into two paths, one path enters the double-effect high-pressure generator (17) through the double-effect high-temperature heat exchanger (16), and after being concentrated, the first-stage lithium bromide solution returns to the absorber (2) through the double-effect high-temperature heat exchanger (16) and the third heat exchanger (14); the other path of the concentrated solution enters a double-effect low-pressure generator (18) through a double-effect low-temperature heat exchanger (15), and the concentrated solution returns to the absorber (2) through the double-effect low-temperature heat exchanger (15) and a third heat exchanger (14); or the first-stage lithium bromide solution extracted by the fourth solution pump (13) flows through the third heat exchanger (14) firstly, then enters the double-effect high-pressure generator (17) and the double-effect low-pressure generator (18) through the double-effect high-temperature heat exchanger (16) and the double-effect low-temperature heat exchanger (15) respectively, and returns to the absorber (2) through the double-effect high-temperature heat exchanger (16) and the double-effect low-temperature heat exchanger (15) respectively after being concentrated; or the first-stage lithium bromide solution extracted by the fourth solution pump (13) flows through the double-effect low-temperature heat exchanger (15) and the double-effect high-temperature heat exchanger (16) in series, then enters the double-effect high-pressure generator (17), enters the double-effect low-pressure generator (18) through the double-effect high-temperature heat exchanger (16) after being concentrated, and finally returns to the absorber (2) through the double-effect low-temperature heat exchanger (15) and the third heat exchanger (14); or the waste water flows through the third heat exchanger (14), flows through the double-effect low-temperature heat exchanger (15) and the double-effect high-temperature heat exchanger (16) in series, then enters the double-effect high-pressure generator (17), and enters the double-effect low-pressure generator (18) through the double-effect high-temperature heat exchanger (16) after being concentrated, and then directly returns to the absorber (2) through the double-effect low-temperature heat exchanger (15) after being concentrated again.
2. The double-effect and two-stage composite lithium bromide absorption chiller according to claim 1 and characterized in that: the cooling water flows through the absorber (2), the high-pressure absorber (4) and the condenser (6) in parallel, and can also flow through the absorber (2), the high-pressure absorber (4) and the condenser (6) in series or in series-parallel in any order.
3. The double-effect and two-stage composite lithium bromide absorption chiller according to claim 1 and characterized in that: the third solution pump (12) pumps out the second-stage lithium bromide solution in the high-pressure absorber (4), sends the second-stage lithium bromide solution into the two-stage high-pressure generator (5) through the second heat exchanger (8) for heating and concentrating, and returns the concentrated solution to the high-pressure absorber (4) through the second heat exchanger (8); the refrigerant steam generated by concentrating the lithium bromide solution in the two-stage high-pressure generator (5), the double-effect high-pressure generator (17) and the double-effect low-pressure generator (18) enters the condenser (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159622.9A CN112747495B (en) | 2021-02-05 | 2021-02-05 | Double-effect and two-stage composite lithium bromide absorption type water chilling unit |
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| CN202110159622.9A CN112747495B (en) | 2021-02-05 | 2021-02-05 | Double-effect and two-stage composite lithium bromide absorption type water chilling unit |
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| CN112747495B true CN112747495B (en) | 2024-05-14 |
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| CN106440477A (en) * | 2016-11-19 | 2017-02-22 | 双良节能系统股份有限公司 | Overlapping type solution serial-parallel double-effect lithium bromide absorption type refrigerating heat pump unit |
| CN106482384A (en) * | 2016-11-19 | 2017-03-08 | 双良节能系统股份有限公司 | Superposition type solution serial double-effect lithium bromide absorption type refrigeration heat pump unit |
| CN106679224A (en) * | 2016-11-19 | 2017-05-17 | 双良节能系统股份有限公司 | Overlapping type solution serial double-effect lithium bromide absorption refrigeration heat pump unit |
| CN206247687U (en) * | 2016-11-19 | 2017-06-13 | 双良节能系统股份有限公司 | Superposition type solution connection in series-parallel double-effect lithium bromide absorption type refrigerating heat pump unit |
| CN214371048U (en) * | 2021-02-05 | 2021-10-08 | 双良节能系统股份有限公司 | Double-effect and two-stage composite lithium bromide absorption type water chilling unit |
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2021
- 2021-02-05 CN CN202110159622.9A patent/CN112747495B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106440477A (en) * | 2016-11-19 | 2017-02-22 | 双良节能系统股份有限公司 | Overlapping type solution serial-parallel double-effect lithium bromide absorption type refrigerating heat pump unit |
| CN106482384A (en) * | 2016-11-19 | 2017-03-08 | 双良节能系统股份有限公司 | Superposition type solution serial double-effect lithium bromide absorption type refrigeration heat pump unit |
| CN106679224A (en) * | 2016-11-19 | 2017-05-17 | 双良节能系统股份有限公司 | Overlapping type solution serial double-effect lithium bromide absorption refrigeration heat pump unit |
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| CN214371048U (en) * | 2021-02-05 | 2021-10-08 | 双良节能系统股份有限公司 | Double-effect and two-stage composite lithium bromide absorption type water chilling unit |
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| CN112747495A (en) | 2021-05-04 |
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