CN110173924B - Steam type lithium bromide absorption heat pump unit for single-effect heating double-effect refrigeration - Google Patents
Steam type lithium bromide absorption heat pump unit for single-effect heating double-effect refrigeration Download PDFInfo
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- CN110173924B CN110173924B CN201910526861.6A CN201910526861A CN110173924B CN 110173924 B CN110173924 B CN 110173924B CN 201910526861 A CN201910526861 A CN 201910526861A CN 110173924 B CN110173924 B CN 110173924B
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 46
- 238000005057 refrigeration Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000006096 absorbing agent Substances 0.000 claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000000498 cooling water Substances 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims 1
- 239000012808 vapor phase Substances 0.000 claims 1
- 239000002918 waste heat Substances 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000011084 recovery Methods 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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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to a single-effect heating double-effect refrigeration steam type lithium bromide absorption heat pump unit, belonging to the technical field of refrigeration equipment. The unit comprises a steam generator I, a condenser I, a steam generator II, a low-pressure generator, a condenser II, an evaporator, an absorber, a heat exchanger I, a heat exchanger II, a solution pump I, a solution pump II, a refrigerant pump, a stop valve A, a stop valve B, a refrigerant steam communicating pipe and a low-pressure generator refrigerant water pipe. According to the steam type lithium bromide absorption heat pump unit for single-effect heating and double-effect refrigeration, through valve switching, when a heating working condition is operated in winter, the unit operates according to the principle of two parallel single-effect heat pumps; and when the refrigerating working condition is operated in summer, the unit operates according to the steam double-effect solution parallel refrigerating principle. Because of double-effect refrigeration, the refrigeration performance coefficient is greatly improved, the steam consumption is saved, the machine is dual-purpose, the equipment initial investment is reduced, and the equipment occupied space is saved.
Description
Technical Field
The invention relates to a single-effect heating double-effect refrigeration steam type lithium bromide absorption heat pump unit, belonging to the technical field of refrigeration equipment.
Background
In the production process and the area with low-temperature waste heat, the first lithium bromide absorption heat pump unit is used for extracting the low-temperature waste heat, so that a medium-temperature heat source which is higher than the low-temperature heat source by more than 40 ℃ is prepared, a large amount (more than 40%) of medium-pressure steam consumption can be saved, the comprehensive utilization of energy is realized, better economic and social benefits are obtained, and a large amount of applications are obtained in recent years. In some occasions, heat supply is needed in winter and refrigeration is needed in summer, so that one machine can be used for two purposes, initial investment is saved, a steam type first-class lithium bromide absorption heat pump unit with a refrigeration function (as shown in figure 1) appears in the last two years, and the heating performance coefficient of the unit is about 1.7, and the refrigerating performance coefficient of the unit is about 0.75 due to the fact that the unit is a single-effect unit. The refrigeration performance coefficient of the steam double-effect lithium bromide absorption chiller is about 1.45, and obviously, the single-effect chiller has a great quantity of steam which is consumed by the unit cold quantity of the double-effect chiller compared with the double-effect chiller, and how to realize double-effect refrigeration on the single-effect heat pump improves the refrigeration performance coefficient, saves steam and has simple operation, thus becoming one of the important subjects of the current research.
Disclosure of Invention
The invention aims to solve the background problem and provide a single-effect heating double-effect refrigerating steam type lithium bromide absorption heat pump unit, which is characterized by dual purposes of single-effect heat pump recovery waste heat heating in winter and double-effect refrigerating in summer operation, improved refrigerating performance coefficient, energy saving, initial investment reduction, compact structure and simple operation.
The invention aims at realizing the following steps: the steam type lithium bromide absorption heat pump unit comprises a steam generator I, a condenser I, a steam generator II, a condenser II, an evaporator, an absorber, a heat exchanger I, a heat exchanger II, a solution pump I, a solution pump II and a refrigerant pump;
the generator condenser shell of the unit comprises a cavity A and a cavity B;
The steam generator I and the condenser I are both arranged in the cavity A;
The steam generator II and the condenser II are arranged in the cavity B;
A low-pressure generator is additionally arranged in the cavity B;
A refrigerant vapor communicating pipe is arranged between the side gas phase region of the vapor generator I and the tube side inlet of the low-pressure generator;
a low-pressure generator refrigerant water pipe is arranged between the low-pressure generator tube side outlet and the U-shaped pipe I refrigerant water inlet;
a stop valve B is arranged on a hot water pipeline from the condenser II to the condenser I;
And a cooling water outlet pipe is arranged on a hot water pipeline between the condenser II and the stop valve B, and the stop valve A is arranged on the cooling water outlet pipe.
The low-pressure generator is arranged above the steam generator II.
A second steam inlet of the cavity A is also provided with a steam electric regulating valve A; and a steam electric regulating valve B is also arranged on the first steam inlet of the cavity B.
And a U-shaped pipe II is further arranged between the condenser II and the evaporator, and the refrigerant steam generated by concentrating the dilute solution by the low-pressure generator enters the condenser II to be condensed, and the condensed refrigerant water enters the U-shaped pipe II to further enter the evaporator to be flashed.
On the basis of the above-mentioned unit, the low-pressure generator can also be arranged below the steam generator II in the cavity B.
When the heat pump supplies heat in winter, the low-pressure generator stops working, the stop valve A is closed, the stop valve B is opened, the solution refrigerant circulation in the unit is two parallel single-effect heat pump circulation, and one single-effect heat pump circulation is composed of a steam generator I, a condenser I, an evaporator, an absorber, a heat exchanger I, a solution pump I and a refrigerant pump; the other single-effect heat pump cycle consists of a steam generator II, a condenser II, an evaporator, an absorber, a heat exchanger II, a solution pump II and a refrigerant pump. Wherein the evaporator, absorber and refrigerant pump are common parts of the two cycles. The low temperature of the refrigerant vapor in the tube side of the low-pressure generator does not concentrate the solution, which is equivalent to stopping the operation. Steam of an external system respectively enters a steam generator I and a steam generator II through a steam electric regulating valve A and a steam electric regulating valve B, condensed into water and flows out of a unit after being concentrated into a thin solution, waste heat water enters an evaporator tube Cheng Jiangwen, heat is utilized and flows out of the unit, hot water is firstly heated in series by an absorber and then enters a condenser II for heating, and then enters a condenser I for heating after being heated in a tube pass for a user;
When the double-effect refrigeration working condition is operated in summer, the stop valve A is opened, the stop valve B is closed, the steam electric regulating valve B is closed, the condenser I and the steam generator II stop working, the steam generator I becomes a high-pressure generator of the double-effect refrigeration unit, the high-pressure generator, the low-pressure generator, the condenser II, the evaporator, the absorber, the heat exchanger I, the heat exchanger II, the solution pump I and the refrigerant pump form the steam double-effect refrigeration unit, and the unit operates according to a steam double-effect solution parallel refrigeration flow. Steam of an external system enters a tube side concentrated dilute solution of a steam generator I through a steam electric regulating valve A to be condensed into water which flows out of the unit; the cooling water firstly enters the absorber in series and then enters the tube pass of the condenser II to carry heat out of the unit; cold water enters the evaporator tube to cool down to become a cold user for supplying the prepared cold water.
The beneficial effects of the invention are as follows:
Through the brand new two single-effect heat pump cycles, the double-effect refrigeration cycle and the valve switching adjustment, the two completely different thermal fields and flow fields of single-effect heating and double-effect refrigeration are realized on the same unit. Because of double-effect refrigeration, the refrigeration performance coefficient is greatly improved, the steam consumption is saved, the machine is dual-purpose, the equipment initial investment is reduced, and the equipment occupied space is saved. Therefore, the heat pump unit can save energy and reduce emission when heating in winter, realize comprehensive utilization of energy, and can realize double-effect refrigeration in summer to meet the requirements of air conditioning and production process use, thereby improving annual operation utilization rate of the unit and having very good economic and social benefits.
Drawings
FIG. 1 is a flow chart of a conventional vapor type first-class lithium bromide absorption heat pump unit with a refrigeration function;
FIG. 2 is a flow chart of a single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit;
Fig. 3 is a flow chart of another embodiment of a single-effect heating and double-effect refrigeration vapor type lithium bromide absorption heat pump unit according to the invention.
Wherein:
the device comprises a generator 1, a condenser 2, an evaporator 4, an absorber 5, a heat exchanger 3, a solution pump 6, a refrigerant pump 7, a steam electric regulating valve 8, a cooling water bypass valve 9 and a U-shaped pipe 10;
The system comprises a stop valve A11, a steam electric regulating valve A12, a cavity A13, a condenser I14, a stop valve B15, a steam generator I16, a refrigerant steam communicating pipe 17, a low-pressure generator 18, a steam generator II19, a condenser II20, a cavity B21, a steam electric regulating valve B22, a heat exchanger II23, a U-shaped pipe II24, a solution pump II25, a solution pump I26, a U-shaped pipe I27, a low-pressure generator refrigerant water pipe 28 and a heat exchanger I29;
A first steam inlet 30, a first condensate outlet 31, a cooling water outlet 32, a heating hot water outlet 33, a cold water outlet 34, a waste heat water outlet 35, a cold water inlet 36, a waste heat water inlet 37, a cooling water inlet 38, a heating hot water inlet 39, a second steam inlet 40, and a second condensate outlet 41.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 2, a single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit comprises a steam generator I16, a condenser I14, a steam generator II19, a condenser II20, an evaporator 4, an absorber 5, a heat exchanger I29, a heat exchanger II23, a solution pump I26, a solution pump II25 and a refrigerant pump 7;
the generator condenser shell of the unit comprises a cavity A13 and a cavity B21;
The steam generator I16 and the condenser I14 are arranged in the cavity A13;
the steam generator II19 and the condenser II20 are arranged in the cavity B21;
A low-pressure generator 18 is additionally arranged in the cavity B21;
The low-pressure generator 18 is arranged above the steam generator II 19;
a refrigerant vapor communication pipe 17 is arranged between the side gas phase region of the vapor generator I16 and the tube side inlet of the low pressure generator 18;
A low-pressure generator refrigerant water pipe 28 is arranged between the tube side outlet of the low-pressure generator 18 and the refrigerant water inlet of the U-shaped pipe I27;
A stop valve B15 is arranged on a hot water pipeline from the condenser II20 to the condenser I14;
a cooling water outlet pipe is arranged on the hot water pipeline between the condenser II20 and the stop valve B15, and a stop valve A11 is arranged on the cooling water outlet pipe.
A steam electric regulating valve A12 is also arranged on a second steam inlet 40 pipeline of the cavity A13; the first steam inlet 30 pipeline of the cavity B21 is also provided with a steam electric regulating valve B22.
A U-shaped pipe II24 is also arranged between the condenser II20 and the evaporator 4.
When the heat pump supplies heat in winter, the low-pressure generator 18 stops working, the stop valve A11 is closed, the stop valve B15 is opened, the solution refrigerant circulation in the unit is two parallel single-effect heat pump circulation, and one single-effect heat pump circulation is composed of a steam generator I16, a condenser I14, an evaporator 4, an absorber 5, a heat exchanger I29, a solution pump I26 and a refrigerant pump 7; the other single-effect heat pump cycle is composed of a steam generator II19, a condenser II20, an evaporator 4, an absorber 5, a heat exchanger II23, a solution pump II25 and a refrigerant pump 7. Wherein the evaporator 4, the absorber 5 and the refrigerant pump 7 are common parts of two cycles. The low temperature of the refrigerant vapor in the tube side of the low pressure generator 18 does not concentrate the solution, which corresponds to a shutdown. Steam of an external system respectively enters a steam generator I16 and a steam generator II19 through a steam electric regulating valve A12 and a steam electric regulating valve B22 to concentrate dilute solution in tube passes and then condense the dilute solution into a water outflow unit, waste heat water enters an evaporator 4 tube pass cooling heat to be utilized and then flows out of the unit, and hot water firstly enters an absorber 5 for heating, then enters a condenser II20 for heating and then enters a condenser I14 for heating, and then supplies heat for a user.
When the double-effect refrigeration working condition is operated in summer, the stop valve A11 is opened, the stop valve B15 is closed, the steam electric regulating valve B22 is closed, the condenser I14 and the steam generator II19 stop working, the steam generator I16 becomes a high-pressure generator of the double-effect refrigeration unit, and the steam double-effect refrigeration unit is formed by the high-pressure generator, the low-pressure generator 18, the condenser II20, the evaporator 4, the absorber 5, the heat exchanger I29, the heat exchanger II23, the solution pump II25, the solution pump I26 and the refrigerant pump 7 and operates according to a steam double-effect solution parallel refrigeration flow. Steam of an external system enters a tube side concentrated dilute solution of the high-pressure generator through a steam electric regulating valve A12 to be condensed into water which flows out of the unit; the cooling water is connected in series, firstly enters the absorber 5 and then enters the tube side of the condenser II20 to carry heat out of the unit; the cold water enters the tube side of the evaporator 4 to be cooled to be a cold user for supplying the cold water to be prepared.
The working principle of the solution parallel double-effect refrigeration cycle is as follows: the solution pump I26 pumps the dilute solution into the high-pressure generator to concentrate the dilute solution into the concentrated solution, the generated high-temperature refrigerant steam enters the heat transfer pipe of the low-pressure generator 18 through the refrigerant steam communicating pipe 17, the dilute solution pumped into the low-pressure generator 18 by the solution pump II25 is heated to become the concentrated solution, the refrigerant steam in the heat transfer pipe of the low-pressure generator 18 is condensed into refrigerant water, the refrigerant water enters the U-shaped pipe I through the low-pressure generator refrigerant water pipe 28 and then enters the evaporator 4 to flash, the refrigerant steam generated by concentrating the dilute solution by the low-pressure generator 18 enters the condenser II20 to condense, the condensed refrigerant water enters the U-shaped pipe II24 and then enters the evaporator 4 to flash, the non-flash refrigerant water completely enters the bottom of the evaporator 4, the refrigerant water is pumped into the surface of the heat transfer pipe of the evaporator 4 to absorb heat and evaporate, the evaporated refrigerant steam enters the absorber 5 to be absorbed by the concentrated solution from the high-pressure generator and the low-pressure generator 18 and sprayed on the surface of the heat transfer pipe of the absorber 5, and the heat is discharged from the cooling water set. The needed cold water is produced by continuous circulation for users.
In another embodiment, as shown in fig. 3, a single-effect heating and double-effect refrigeration steam type lithium bromide absorption heat pump unit is based on fig. 2, and a low-pressure generator 18 is arranged below a steam generator II19 in a cavity B21.
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 (7)
1. The utility model provides a single-effect heats double-effect refrigerated steam type lithium bromide absorption heat pump unit, the unit includes steam generator I (16), condenser I (14), steam generator II (19), condenser II (20), evaporimeter (4), absorber (5), heat exchanger I (29), heat exchanger II (23), solution pump I (26), solution pump II (25) and refrigerant pump (7), its characterized in that:
The generator condenser shell of the unit comprises a cavity A (13) and a cavity B (21);
the steam generator I (16) and the condenser I (14) are both arranged in the cavity A (13);
the steam generator II (19) and the condenser II (20) are arranged in the cavity B (21);
A low-pressure generator (18) is additionally arranged in the cavity B (21);
A refrigerant vapor communicating pipe (17) is arranged between the vapor phase area at the side of the vapor generator I (16) and the tube side inlet of the low-pressure generator (18);
a low-pressure generator refrigerant water pipe (28) is arranged between the tube side outlet of the low-pressure generator (18) and the refrigerant water inlet of the U-shaped pipe I (27);
A stop valve B (15) is arranged on a hot water pipeline of the condenser II (20) entering the condenser I (14);
a cooling water outlet pipe is arranged on a hot water pipeline between the condenser II (20) and the stop valve B (15), and a stop valve A (11) is arranged on the cooling water outlet pipe.
2. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit as claimed in claim 1, wherein: the low-pressure generator (18) is arranged above the steam generator II (19).
3. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit as claimed in claim 1, wherein: the low-pressure generator (18) is also arranged below the steam generator II (19) in the cavity B.
4. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit as claimed in claim 1, wherein: a second steam inlet (40) of the cavity A (13) is also provided with a steam electric regulating valve A (12); a steam electric regulating valve B (22) is also arranged on the first steam inlet (30) pipeline of the cavity B (21).
5. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit as claimed in claim 1, wherein: a U-shaped pipe II (24) is arranged between the condenser II (20) and the evaporator (4).
6. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit as claimed in claim 1, wherein: when the heat pump supplies heat in winter, the low-pressure generator (18) stops working, the stop valve A (11) is closed, the stop valve B (15) is opened, the solution cooling agent circulation in the unit is two parallel single-effect heat pump circulation, and one single-effect heat pump circulation is composed of a steam generator I (16), a condenser I (14), an evaporator (4), an absorber (5), a heat exchanger I (29), a solution pump I (26) and a refrigerant pump (7); the other single-effect heat pump cycle consists of a steam generator II (19), a condenser II (20), an evaporator (4), an absorber (5), a heat exchanger II (23), a solution pump II (25) and a refrigerant pump (7), wherein the evaporator (4), the absorber (5) and the refrigerant pump (7) are common parts of two cycles.
7. The single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit according to claim 4, wherein the single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit is characterized in that: when the double-effect refrigeration working condition is operated in summer, the stop valve A (11) is opened, the stop valve B (15) is closed, the steam electric regulating valve B (22) is closed, the condenser I (14) and the steam generator II (19) stop working, the steam generator I (16) becomes a high-pressure generator of the double-effect refrigeration unit, and the steam double-effect refrigeration unit is formed by the high-pressure generator, the low-pressure generator (18), the condenser II (20), the evaporator (4), the absorber (5), the heat exchanger I (29), the heat exchanger II (23), the solution pump II (25), the solution pump I (26) and the refrigerant pump (7) and operates according to a steam double-effect solution parallel refrigeration flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526861.6A CN110173924B (en) | 2019-06-18 | 2019-06-18 | Steam type lithium bromide absorption heat pump unit for single-effect heating double-effect refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526861.6A CN110173924B (en) | 2019-06-18 | 2019-06-18 | Steam type lithium bromide absorption heat pump unit for single-effect heating double-effect refrigeration |
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| Publication Number | Publication Date |
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| CN110173924A CN110173924A (en) | 2019-08-27 |
| CN110173924B true CN110173924B (en) | 2024-04-26 |
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| CN110542241B (en) * | 2019-09-19 | 2024-03-08 | 双良节能系统股份有限公司 | Single-double effect composite steam-absorption two-section type first lithium bromide absorption heat pump unit |
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| CN106989536A (en) * | 2017-04-14 | 2017-07-28 | 双良节能系统股份有限公司 | Multifunctional steam type first class lithium bromide absorptive heat pump unit |
| CN206695433U (en) * | 2017-04-14 | 2017-12-01 | 双良节能系统股份有限公司 | Multisection type first class lithium bromide absorptive heat pump unit with condensate recuperation of heat |
| CN211233437U (en) * | 2019-06-18 | 2020-08-11 | 双良节能系统股份有限公司 | Single-effect heating and double-effect refrigerating steam type lithium bromide absorption heat pump unit |
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