CN110542240A - Single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit - Google Patents
Single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit Download PDFInfo
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- CN110542240A CN110542240A CN201910883847.1A CN201910883847A CN110542240A CN 110542240 A CN110542240 A CN 110542240A CN 201910883847 A CN201910883847 A CN 201910883847A CN 110542240 A CN110542240 A CN 110542240A
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 34
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000003507 refrigerant Substances 0.000 claims abstract description 50
- 239000006096 absorbing agent Substances 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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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
- F25B33/00—Boilers; Analysers; Rectifiers
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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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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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
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
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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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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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)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to a single-effect and double-effect composite steam type first-class lithium bromide absorption heat pump unit, belonging to the technical field of refrigeration equipment. The solution in the unit circulates according to the inverse series flow, and a single-effect heat pump circulation is formed by a steam high-pressure generator (1), a high-pressure condenser (2), an evaporator (6) and an absorber (5); a double-effect heat pump cycle is formed by a steam high generator (1), a low-pressure generator (3), a low-pressure condenser (4), an evaporator (6) and an absorber (5). The high-temperature heat exchanger (11), the low-temperature heat exchanger (9), the dilute solution pump (8), the intermediate solution pump (10) and the refrigerant pump (7) are common components of single-effect heat pump circulation and double-effect heat pump circulation, and the single-effect heat pump circulation and the double-effect heat pump circulation are combined together to operate. The unit can recover low-temperature waste heat, has large temperature rise of heating medium water, high temperature and high performance coefficient, can realize high-efficiency energy conservation and emission reduction to realize comprehensive utilization of energy, and has very good economic and social benefits.
Description
Technical Field
The invention relates to a single-effect and double-effect composite steam type first-class lithium bromide absorption heat pump unit, belonging to the technical field of refrigeration equipment.
background
In the areas which need heat sources and have low-temperature waste heat in production process and life, the first-class lithium bromide absorption heat pump unit is adopted to extract the low-temperature waste heat to prepare medium-temperature heat medium water, so that the consumption of high-grade heat sources can be saved, and a large amount of applications are obtained in recent years.
In practical application, the unit can select a single-effect heat pump or a double-effect heat pump according to parameter conditions, for example, a driving heat source is steam with the pressure of 0.6-0.8 MPa.G, when the return water temperature of the heat medium water is lower, such as about 40 ℃, and the outlet water temperature of the heat medium water is lower, such as below 60 ℃, in order to improve efficiency, a steam double-effect heat pump unit is generally adopted, more waste heat can be recovered, energy can be saved, and the performance coefficient of the steam double-effect heat pump is about 2.3;
when the temperature of the outlet water of the heating medium water is required to be higher than 60 ℃, a single-effect heat pump is needed to improve the temperature of the prepared heating medium water, and the performance coefficient of the steam single-effect heat pump is about 1.7. It can be seen that the single-effect type has lower coefficient of performance than the double-effect type, when the same heating quantity is prepared, the single-effect type recovers less waste heat and consumes more high-grade heat sources, and the single-effect type heat pump has the advantage of being capable of preparing hot water with higher temperature.
Under the condition, how the heat pump unit can take out higher-temperature heat medium water, and simultaneously can recover more waste heat, reduce the consumption of high-grade heat sources, improve the comprehensive performance coefficient of the heat pump unit, save energy and become one of the important subjects of the current research.
Disclosure of Invention
the invention aims to solve the problems in the background problem and provides a single-effect and double-effect composite steam type first-class lithium bromide absorption heat pump unit which can recover low-temperature waste heat, has large temperature rise of heating medium water, high temperature and performance coefficient, saves energy and is simple to operate.
the purpose of the invention is realized as follows: a single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit comprises a steam high-pressure generator, a high-pressure condenser, a low-pressure generator, a low-pressure condenser, an evaporator, an absorber, a high-temperature heat exchanger, a low-temperature heat exchanger, a dilute solution pump, an intermediate solution pump, a refrigerant pump and a hot water three-way valve;
The unit is provided with four cavities: the steam high-pressure generator is arranged in the first cavity; the high-pressure condenser is arranged in the second cavity; the low-pressure generator and the low-pressure condenser are arranged in the third cavity; the evaporator and the absorber are arranged in the fourth cavity;
the pressure in the cavity of the steam high-pressure generator, the cavity of the high-pressure condenser and the tube pass of the low-pressure generator are high-generation pressure, and the pressure is highest;
the pressure in the cavity where the low-pressure generator and the low-pressure condenser are located is the condensing pressure, and the pressure is higher;
The pressure in the cavity where the evaporator and the absorber are located is the pressure corresponding to the evaporation temperature, and the pressure is the lowest.
a steam inlet pipeline is arranged on the steam high-pressure generator inlet pipe box, a steam inlet adjusting valve is arranged on the steam high-pressure generator inlet pipe box, and a steam condensate outlet pipe is arranged at the bottom of the steam high-pressure generator outlet pipe box; the middle solution inlet of the steam high-pressure generator is connected with the middle solution outlet of the high-temperature heat exchanger through a pipeline, and the concentrated solution outlet of the steam high-pressure generator is connected with the concentrated solution inlet of the high-temperature heat exchanger through a pipeline;
the high-temperature refrigerant steam main pipe is led out from the steam high-pressure generator and is divided into two branches, wherein one branch is a pipeline for high-temperature refrigerant steam to enter a high-pressure condenser, and the other branch is a pipeline for high-temperature refrigerant steam to enter a low-pressure generator;
A high-temperature refrigerant water outlet pipe of the high-pressure condenser and a low-pressure generator tube pass high-temperature refrigerant water outlet pipe are connected together and then connected into a U-shaped pipe II, and the U-shaped pipe II is communicated with a low-pressure condenser flash pipe;
And a refrigerant water outlet pipe of the low-pressure condenser is connected into a U-shaped pipe I, and the U-shaped pipe I is communicated with the flash pipe of the evaporator.
The hot water system is also provided with a hot water three-way valve on a pipeline of the hot water outlet absorber, a first interface of the hot water three-way valve is communicated with a hot water outlet pipeline of the absorber, a second interface is communicated with a hot water inlet pipeline of the high-pressure condenser, and a third interface is communicated with a hot water bypass pipeline connected to a hot water main outlet pipe.
The steam high-pressure generator, the high-pressure condenser, the evaporator and the absorber form a single-effect heat pump cycle;
the steam high generator, the low-pressure condenser, the evaporator and the absorber form a double-effect heat pump cycle;
the high-temperature heat exchanger, the low-temperature heat exchanger, the dilute solution pump, the intermediate solution pump and the refrigerant pump are shared components of the single-effect heat pump cycle and the double-effect heat pump cycle;
the single-effect heat pump cycle and the double-effect heat pump cycle are combined and operated together, and the solution cycle in the unit is circulated according to an inverted series-connection process.
Steam of an external system enters a steam high-pressure generator tube bundle for condensation, and steam condensate flows out through a steam condensate outlet pipe; the residual heat water enters an evaporator to be cooled; the hot water firstly enters the low-pressure condenser, then enters the absorber and finally enters the high-pressure condenser to complete the whole temperature rise process.
Preferably, on the basis of the unit, a high-temperature refrigerant water heat exchanger is additionally arranged in the single-effect heat pump circulation, so that the high-temperature refrigerant water in the U-shaped pipe II exchanges heat with part of dilute solution separated from the outlet of the dilute solution pump, the dilute solution enters the low-pressure generator together with the dilute solution discharged from the low-temperature heat exchanger after being heated, the heat of the high-temperature refrigerant water is recovered by the dilute solution, and the performance coefficient of the unit is improved.
Compared with the prior art, the invention has the following advantages:
The single-effect and double-effect composite steam type first-class lithium bromide absorption heat pump unit realizes the composition of single-effect circulation and double-effect circulation on the same unit through the brand new structure and flow, and the hot water three-way valve adjusts the flow of hot water entering the high-pressure condenser according to the high generation pressure so as to ensure that the temperature of a hot water outlet of the high-pressure condenser is high and stable, thereby ensuring the high generation pressure to be stable and ensuring the normal operation of the double-effect circulation. The single-effect circulation increases the temperature rise of the heating medium water and improves the temperature, the double-effect circulation improves the performance coefficient, more waste heat can be recovered, and the steam is saved. The added refrigerant water heat exchanger enables the heat of high-temperature refrigerant water to be transferred to dilute solution entering the low-pressure generator, and the performance coefficient of the unit is further improved. The invention can recover low-temperature waste heat, has large temperature rise of the heating medium water, high temperature and high performance coefficient, can save energy, reduce emission, realize comprehensive utilization of energy and has very good economic and social benefits.
drawings
FIG. 1 is a flow chart of the operation of a single-effect and double-effect combined steam type first-type lithium bromide absorption heat pump unit of the present invention;
fig. 2 is a flow chart of the operation of another single-double effect composite steam type first type lithium bromide absorption heat pump unit of the present invention.
in the figure: a high-pressure steam generator 1, a high-pressure condenser 2, a low-pressure generator 3, a low-pressure condenser 4, an evaporator 6, an absorber 5, a high-temperature heat exchanger 11, a low-temperature heat exchanger 9, a dilute solution pump 8, a refrigerant pump 7, an intermediate solution pump 10, a U-shaped pipe I12, a U-shaped pipe II 13, a low-pressure generator tube side high-temperature refrigerant water outlet pipe 17, a high-temperature refrigerant water outlet pipe 18 of the high-pressure condenser, a steam condensate water outlet pipe 14, the system comprises a steam inlet adjusting valve 15, a high-temperature refrigerant steam header pipe 16, a hot water header pipe 19, a hot water three-way valve 20, a hot water bypass pipeline 21, a high-temperature refrigerant steam inlet high-pressure condenser pipeline 22, a high-temperature refrigerant steam inlet low-pressure generator pipeline 23, a hot water inlet pipe 24, a residual hot water outlet pipe 25, a residual hot water inlet pipe 26, a high-temperature refrigerant water heat exchanger 27, a first cavity 28, a second cavity 29, a third cavity 30 and a fourth cavity 31.
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, a single-double effect composite steam type first type lithium bromide absorption heat pump unit comprises a steam high pressure generator 1, a high pressure condenser 2, a low pressure generator 3, a low pressure condenser 4, an evaporator 6, an absorber 5, a high temperature heat exchanger 11, a low temperature heat exchanger 9, a dilute solution pump 8, an intermediate solution pump 10, a refrigerant pump 7, a hot water three-way valve 20 and pipelines for connecting all the components;
The unit is provided with four cavities: the steam high-pressure generator 1 is arranged in the first cavity 28; the high-pressure condenser 2 is arranged in the second cavity 29; the low pressure generator 3 and the low pressure condenser 4 are arranged in the third chamber 30; the evaporator 6 and the absorber 5 are arranged in the fourth cavity 31;
The pressure in the cavity of the steam high-pressure generator 1, the cavity of the high-pressure condenser 2 and the tube pass of the low-pressure generator 3 is the high generation pressure, and the pressure is highest; the pressure in the cavity where the low-pressure generator 3 and the low-pressure condenser 4 are located is the condensing pressure, and the pressure is higher; the pressure in the cavity where the evaporator 6 and the absorber 5 are located is the pressure corresponding to the evaporation temperature, and the pressure is the lowest.
a steam inlet pipeline is arranged on an inlet pipe box of the steam high-pressure generator 1, a steam inlet adjusting valve 15 is arranged on the steam inlet pipeline, and a steam condensate outlet pipe 14 is arranged at the bottom of an outlet pipe box of the steam high-pressure generator 1; the middle solution inlet of the steam high-pressure generator 1 is connected with the middle solution outlet of the high-temperature heat exchanger 11 through a pipeline, and the concentrated solution outlet of the steam high-pressure generator 1 is connected with the concentrated solution inlet of the high-temperature heat exchanger 11 through a pipeline;
the high-temperature refrigerant steam main pipe 16 led out from the steam high-pressure generator 1 is divided into two branches, wherein one branch is used for leading high-temperature refrigerant steam into a high-pressure condenser pipeline 22, and the other branch is used for leading the high-temperature refrigerant steam into a low-pressure generator tube pass pipeline 23;
a high-temperature refrigerant water outlet pipe 18 of the high-pressure condenser and a low-pressure generator tube pass high-temperature refrigerant water outlet pipe 17 are connected together and then are connected into a U-shaped pipe II 13, and the U-shaped pipe II 13 is communicated with a flash pipe of the low-pressure condenser 4; a total refrigerant water outlet pipe of the low-pressure condenser 4 is connected into a U-shaped pipe I12, and the U-shaped pipe I12 is communicated with a flash pipe of the evaporator 6.
the hot water system is also provided with a hot water three-way valve 20 on a pipeline of the hot water outlet absorber 5, a first interface of the hot water three-way valve 20 is communicated with a hot water outlet pipeline of the absorber 5, a second interface is communicated with a hot water inlet pipeline of the high-pressure condenser 2, and a third interface is communicated with a hot water bypass pipeline 21 connected to a hot water main outlet pipe 19.
The single-effect heat pump cycle is formed by the steam high-pressure generator 1, the high-pressure condenser 2, the evaporator 6 and the absorber 5; the double-effect heat pump cycle is formed by a steam high-pressure generator 1, a low-pressure generator 3, a low-pressure condenser 4, an evaporator 6 and an absorber 5; the high-temperature heat exchanger 11, the low-temperature heat exchanger 9, the dilute solution pump 8, the intermediate solution pump 10 and the refrigerant pump 7 are common components of single-effect heat pump circulation and double-effect heat pump circulation, the single-effect heat pump circulation and the double-effect heat pump circulation are combined together to operate, and solution circulation in the unit circulates according to an inverted series flow.
In the embodiment, the working process and the principle of the single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit are as follows:
The driving steam of the external system enters the steam high-pressure generator 1 to be condensed; the residual heat water enters the evaporator 6 for cooling; the hot water enters the low-pressure condenser 4, then enters the absorber 5 and finally enters the high-pressure condenser 2 to complete the whole temperature rise process.
High-temperature refrigerant steam generated by concentrating the intermediate solution by the steam high-pressure generator 1 is divided into two paths, one path of high-temperature refrigerant steam enters the high-pressure condenser 2 to heat hot water and then is condensed into high-temperature refrigerant water, the other path of high-temperature refrigerant steam enters the low-pressure generator 3 to heat a dilute solution and then is condensed into high-temperature refrigerant water, and the two paths of high-temperature refrigerant water are converged together after coming out and enter the low-pressure condenser 4 for flash vaporization through the throttling of the U-shaped pipe II 13; refrigerant steam generated by concentrating the dilute solution by the low-pressure generator 2 enters the low-pressure condenser 4 to heat hot water and then is condensed into low-temperature refrigerant water, and the low-temperature refrigerant water enters the evaporator 6 for flash evaporation through throttling of the U-shaped pipe I12; the concentrated solution from the steam high-pressure generator 1 is cooled by a high-temperature heat exchanger 11 and a low-temperature heat exchanger 9 and enters an absorber 5 for spraying, the concentrated solution absorbs refrigerant steam generated by an evaporator 6 and then becomes a dilute solution, and the dilute solution is lifted by a dilute solution pump 8, heated by the low-temperature heat exchanger 9 and enters a low-pressure generator 3 for concentration into an intermediate solution; the intermediate solution from the low pressure generator 3 is lifted by an intermediate solution pump 10, heated by a high temperature heat exchanger 11, and enters the steam high pressure generator 1 to be concentrated into a concentrated solution. The circulation is continued so that the required hot water is produced.
In another embodiment, as shown in fig. 2, a high-temperature refrigerant water heat exchanger 27 is additionally arranged in a single-effect heat pump cycle of the single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit, so that the high-temperature refrigerant water in the U-shaped pipe ii 13 exchanges heat with a part of dilute solution separated from the outlet of the dilute solution pump 8, the part of dilute solution is heated and then is merged with the dilute solution discharged from the low-temperature heat exchanger 9 to enter the low-pressure generator 3, the heat of the high-temperature refrigerant water is recovered by the dilute solution, and the coefficient of performance of the unit can be improved.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a first type lithium bromide absorption heat pump unit of single or double effect compound steam type, includes steam high pressure generator (1), high pressure condenser (2), low pressure generator (3), low pressure condenser (4), evaporimeter (6), absorber (5), high temperature heat exchanger (11), low temperature heat exchanger (9), weak solution pump (8), intermediate solution pump (10) and cryogen pump (7), its characterized in that:
the unit is provided with four cavities: the steam high-pressure generator (1) is arranged in the first cavity (28); the high-pressure condenser (2) is arranged in the second cavity (29); the low-pressure generator (3) and the low-pressure condenser (4) are arranged in the third cavity (30); the evaporator (6) and the absorber (5) are arranged in the fourth cavity (31);
A steam inlet pipeline is arranged on an inlet pipe box of the steam high-pressure generator (1), a steam inlet adjusting valve (15) is arranged on the steam inlet pipeline, and a steam condensate outlet pipe (14) is arranged at the bottom of an outlet pipe box of the steam high-pressure generator (1); the middle solution inlet of the steam high-pressure generator (1) is connected with the middle solution outlet of the high-temperature heat exchanger (11) through a pipeline, and the concentrated solution outlet of the steam high-pressure generator (1) is connected with the concentrated solution inlet of the high-temperature heat exchanger (11) through a pipeline;
The high-temperature refrigerant steam main pipe (16) is led out of the steam high-pressure generator (1) and is divided into two branches, wherein one branch is used for leading high-temperature refrigerant steam into a high-pressure condenser pipeline (22), and the other branch is used for leading the high-temperature refrigerant steam into a low-pressure generator pipeline (23);
A high-temperature refrigerant water outlet pipe (18) of the high-pressure condenser and a low-pressure generator tube pass high-temperature refrigerant water outlet pipe (17) are connected together and then connected into a U-shaped pipe II (13), and the U-shaped pipe II (13) is communicated with a flash tube of the low-pressure condenser (4);
A refrigerant water outlet pipe of the low-pressure condenser is connected into a U-shaped pipe I (12), and the U-shaped pipe I (12) is communicated with a flash pipe of the evaporator (6).
2. The single-double effect composite steam type first-type lithium bromide absorption heat pump unit according to claim 1, characterized in that: the hot water system of the unit is also provided with a hot water three-way valve (20) on a pipeline of a hot water outlet absorber (5), a first interface of the hot water three-way valve (20) is communicated with a hot water outlet pipeline of the absorber (5), a second interface is communicated with a hot water inlet pipeline of the high-pressure condenser (2), and a third interface is communicated with a hot water bypass pipeline (21) connected to a hot water main outlet pipe (19).
3. the single-double effect composite steam type first-type lithium bromide absorption heat pump unit according to claim 1 or 2, characterized in that: a steam high-pressure generator (1), a high-pressure condenser (2), an evaporator (6) and an absorber (5) in the unit form a single-effect heat pump cycle;
a steam high generator (1), a low-pressure generator (3), a low-pressure condenser (4), an evaporator (6) and an absorber (5) in the unit form a double-effect heat pump cycle;
a high-temperature heat exchanger (11), a low-temperature heat exchanger (9), a dilute solution pump (8), an intermediate solution pump (10) and a refrigerant pump (7) in the unit are shared components of the single-effect heat pump cycle and the double-effect heat pump cycle;
the single-effect heat pump circulation and the double-effect heat pump circulation are combined and operated together, and the solution circulation in the unit is circulated according to the inverted serial flow.
4. The single-double effect composite steam type first-type lithium bromide absorption heat pump unit according to claim 3, characterized in that: and a high-temperature refrigerant water heat exchanger (27) is additionally arranged in the single-effect heat pump cycle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883847.1A CN110542240A (en) | 2019-09-19 | 2019-09-19 | Single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883847.1A CN110542240A (en) | 2019-09-19 | 2019-09-19 | Single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit |
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| CN110542240A true CN110542240A (en) | 2019-12-06 |
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| CN201910883847.1A Pending CN110542240A (en) | 2019-09-19 | 2019-09-19 | Single-effect and double-effect composite steam type first-type lithium bromide absorption heat pump unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271894A (en) * | 2020-03-18 | 2020-06-12 | 双良节能系统股份有限公司 | Super-large two-stage steam type first-class lithium bromide absorption heat pump unit |
| CN111271897A (en) * | 2020-03-18 | 2020-06-12 | 双良节能系统股份有限公司 | Steam type first-class lithium bromide absorption heat pump unit arranged up, middle and down in cooling section |
| CN115638485A (en) * | 2022-09-23 | 2023-01-24 | 东南大学 | Air conditioning system based on double-evaporation-temperature absorption type water chilling unit |
Citations (5)
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| CN111271894A (en) * | 2020-03-18 | 2020-06-12 | 双良节能系统股份有限公司 | Super-large two-stage steam type first-class lithium bromide absorption heat pump unit |
| CN111271897A (en) * | 2020-03-18 | 2020-06-12 | 双良节能系统股份有限公司 | Steam type first-class lithium bromide absorption heat pump unit arranged up, middle and down in cooling section |
| CN115638485A (en) * | 2022-09-23 | 2023-01-24 | 东南大学 | Air conditioning system based on double-evaporation-temperature absorption type water chilling unit |
| CN115638485B (en) * | 2022-09-23 | 2024-04-26 | 东南大学 | Air conditioning system based on double-evaporation temperature absorption type water chilling unit |
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