CN215002381U - High-efficient absorption heat pump - Google Patents
High-efficient absorption heat pump Download PDFInfo
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- CN215002381U CN215002381U CN202121058371.7U CN202121058371U CN215002381U CN 215002381 U CN215002381 U CN 215002381U CN 202121058371 U CN202121058371 U CN 202121058371U CN 215002381 U CN215002381 U CN 215002381U
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Abstract
The utility model discloses a high-efficient absorption heat pump, including cooling tower, condenser, evaporimeter, absorber, solution heat exchanger, high pressure generator, vapour and liquid separator, low pressure generator, subcooler and reservoir, evaporimeter and subcooler are connected with the reservoir, and the reservoir is connected with evaporimeter and subcooler respectively, and the absorber is connected with low pressure generator, and high pressure generator forms gas-liquid separation structure and liquid circulation structure with heat exchanger and vapour and liquid separator. The utility model realizes the advantages of the traditional absorption type refrigerant in the aspect of energy utilization efficiency, and combines the parallel operation of the water pipelines of the evaporator and the subcooler; the internal energy cascade cooling is realized through the heat exchanger, the unit refrigerating capacity is improved through the subcooler, and finally, the heat recovery is utilized, so that the overall energy efficiency and the utilization rate of the system are improved. The heat of the concentrated solution can be transferred to the dilute solution through the three groups of heat exchangers, so that the equipment investment required by cooling is reduced, and the heat consumption for heating the dilute solution is reduced.
Description
Technical Field
The utility model relates to a heat utilization equipment technical field especially relates to an absorption heat pump.
Background
The absorption heat pump is a circulating system which utilizes a low-grade heat source to pump heat from a low-temperature heat source to a high-temperature heat source, and is an effective device for recycling low-temperature heat energy.
An absorption heat pump, also called a heat-increasing heat pump, generates a large amount of medium-temperature heat energy by using a small amount of high-temperature heat source (such as steam, high-temperature hot water, combustion heat of combustible gas, etc.) as a driving heat source. Namely, the high-temperature heat energy is used for driving, the heat energy of the low-temperature heat source is increased to the medium temperature, and therefore the utilization efficiency of the heat energy is improved.
At present, an absorption heat pump uses a lithium bromide unit as a first type of absorption heat pump to complete refrigeration, and comprises a cooling tower, a condenser, a generator, an evaporator, an absorber, a solution heat exchanger, an air conditioner heat exchanger and other parts. However, due to the defects of the refrigeration efficiency and the energy utilization rate, most of the refrigeration efficiency and the energy utilization rate can only be applied to occasions of generating industrial waste heat, utilizing waste heat and the like. The single function makes the utilization ratio of the lithium bromide unit lower, causes the investment cost and the operating cost to rise, and is in obvious disadvantage in comparison with the compression heat pump.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to the defect that prior art exists, provide a structural design more reasonable, can come the high-efficient absorption heat pump of thermal efficiency through means such as gas-liquid separation, heat exchange, subcooling, energy step utilization.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a high-efficient absorption heat pump, is including cooling tower, condenser, evaporimeter, absorber and solution heat exchanger, and the evaporimeter is connected with user side heat exchanger, and the condenser is connected its characterized in that with absorber and cooling tower: the evaporator and the subcooler are respectively connected with an inlet of the liquid storage device, and a liquid outlet of the liquid storage device is respectively connected with a water collecting tray of the evaporator and the subcooler, so that a liquid circulation structure is formed among the evaporator, the subcooler and the liquid storage device; the liquid outlet pipe of the absorber is connected with the low-pressure generator, and the high-pressure generator, the heat exchanger and the gas-liquid separator form a gas-liquid separation structure and a liquid circulation structure.
Furthermore, the solution heat exchanger comprises a first heat exchanger, a second heat exchanger and a third heat exchanger, a concentrated solution outlet of the high-pressure generator is connected with the gas-liquid separator through the second heat exchanger, an air outlet pipe of the gas-liquid separator is connected back to the high-pressure generator, a liquid outlet pipe of the gas-liquid separator is connected with the absorber through the first heat exchanger, and the second heat exchanger is also connected with the high-pressure generator through the third heat exchanger.
Furthermore, the condenser further comprises a supercooling device, a refrigerant outlet pipeline of the condenser is connected with the supercooling device, an outlet of the supercooling device is connected with an inlet of the liquid storage device, and a liquid outlet of the liquid storage device is connected with a water collecting tray of the evaporator, the subcooler and the supercooling device through a refrigerant circulating pump, so that the supercooling pipeline forms a closed loop through the supercooling device, the liquid storage device and the subcooler.
Further, the liquid outlet pipe of the absorber is connected with the low-pressure generator through a refrigerant circulating pump.
Furthermore, a liquid outlet pipeline of the high-pressure generator and a liquid outlet pipeline of the gas-liquid separator are respectively connected with a second heat exchanger and a first heat exchanger.
Furthermore, a first valve is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid reservoir and the evaporator, and two ends of the first valve are connected in parallel with a solution pump; and a second valve is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid reservoir and the subcooler, and two ends of the second valve are connected in parallel with a solution pump.
Furthermore, a third valve and a solution pump are arranged between the concentrated solution outlet of the high-pressure generator and the absorber.
Furthermore, a fourth valve is arranged in a connecting pipeline between a cooling water outlet pipeline of the cooling tower and an inlet of the absorber, and an eighth valve is arranged in a connecting pipeline between a dilute solution outlet pipeline of the absorber and an inlet of the gas-liquid separator.
Further, the inlet of the absorber is provided with a fifth valve, and the outlet of the condenser is provided with a sixth valve, so as to form a switching structure for realizing heat recovery.
Furthermore, a seventh valve is arranged in a connecting pipeline between the refrigerant outlet pipeline of the liquid accumulator and the supercooling device.
The utility model realizes the advantages of the traditional absorption type refrigerant in the aspect of energy utilization efficiency, and combines the parallel operation of the water pipelines of the evaporator and the subcooler; the internal energy cascade cooling is realized through the heat exchanger, the unit refrigerating capacity is improved through the subcooler, and finally, the heat recovery is utilized, so that the overall energy efficiency is improved.
The medium temperature heat is supplied to the absorber and the condenser, the temperature of the absorber can be raised by about 20 ℃, and then the medium temperature heat is supplied to the heat exchanger of the air conditioner of a user for heat supply, so that the utilization rate of the system is greatly improved.
In the unit, the heat of the concentrated solution can be transferred to the dilute solution through the three groups of heat exchangers, so that the equipment investment required by cooling is reduced, and the heat consumption for heating the dilute solution is also reduced. Therefore, compared with the traditional lithium bromide unit, the energy utilization efficiency of refrigeration in summer can be improved by energy cascade utilization.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, a is a high pressure generator, B is a gas-liquid separator, C is a user side heat exchanger, D is a low pressure generator, E is a condenser, F is an evaporator, G is a subcooler, H is an absorber, I is a subcooling device, J is a cooling tower, K is a reservoir, L is a first heat exchanger, M is a second heat exchanger, and N is a third heat exchanger;
1 is the first valve, 2 is the second valve, 3 is the third valve, 4 is the fourth valve, 5 is the fifth valve, 6 is the sixth valve, 7 is the seventh valve, 8 is the eighth valve.
Detailed Description
The invention will be further explained by means of specific embodiments with reference to the accompanying drawings:
in this embodiment, referring to fig. 1, the high-efficiency absorption heat pump includes a cooling tower J, a condenser E, an evaporator F, an absorber H, and a solution heat exchanger, where the evaporator F is connected to a user-side heat exchanger C, and the condenser E is connected to the absorber H and the cooling tower J; the evaporator F, the subcooler G and the subcooler K are respectively connected with an inlet of the liquid storage device H, and a liquid outlet of the liquid storage device H is respectively connected with a water collecting tray of the evaporator F and the subcooler G, so that a liquid circulation structure is formed among the evaporator F, the subcooler G and the liquid storage device K; the liquid outlet pipe of the absorber H is connected with the low-pressure generator D, and the high-pressure generator A, the heat exchanger and the gas-liquid separator B form a gas-liquid separation structure and a liquid circulation structure.
The solution heat exchanger comprises a first heat exchanger L, a second heat exchanger M and a third heat exchanger N, a concentrated solution outlet of the high-pressure generator A is connected with a gas-liquid separator B through the second heat exchanger M, an air outlet pipe of the gas-liquid separator B is connected back to the high-pressure generator A, a liquid outlet pipe of the gas-liquid separator B is connected with the absorber H through the first heat exchanger L, and the second heat exchanger M is further connected with the high-pressure generator A through the third heat exchanger N.
The condenser is characterized by further comprising a supercooling device I, a refrigerant outlet pipeline of the condenser E is connected with the supercooling device I, an outlet of the supercooling device I is connected with an inlet of a liquid storage device K, a liquid outlet of the liquid storage device K is connected with a water collecting tray of the evaporator F, a subcooler G and the supercooling device I through a refrigerant circulating pump, and the supercooling pipeline forms a closed loop through the supercooling device I, the liquid storage device K and the subcooler G.
The liquid outlet pipe of the absorber H is connected with the low-pressure generator D through a refrigerant circulating pump.
The liquid outlet pipeline of the high-pressure generator A and the liquid outlet pipeline of the gas-liquid separator B are respectively connected with a second heat exchanger M and a first heat exchanger L.
A first valve 1 is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid storage device K and the evaporator F, and two ends of the first valve 1 are connected in parallel with a solution pump; a second valve 2 is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid accumulator K and the subcooler G, and two ends of the second valve 2 are connected in parallel with a solution pump.
A third valve 3 and a solution pump are arranged between the concentrated solution outlet of the high-pressure generator A and the absorber H.
A fourth valve 4 is arranged in a connecting pipeline between a cooling water outlet pipeline of the cooling tower J and an inlet of the absorber H, and an eighth valve 8 is arranged in a connecting pipeline between a dilute solution outlet pipeline of the absorber H and an inlet of the gas-liquid separator B.
The inlet of the absorber H is provided with a fifth valve 5 and the outlet of the condenser E is provided with a sixth valve 6 to form a switching structure for heat recovery.
And a seventh valve 7 is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid accumulator K and the supercooling device I.
Single refrigeration condition: the first valve 1, the third valve 3, the fourth valve 4 and the eighth valve 8 are opened, and the second valve 2, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are closed.
An external high-temperature heat source is used for supplying heat to the high-pressure generator A to gasify water in the solution, the water enters the condenser E to be cooled, and then flows into the evaporator F through the throttling and pressure reduction of the first valve 1 and is sprayed on a chilled water supply pipe. And then the water is collected by a water containing disc and enters a liquid storage device K, the water is pumped into an evaporator F by a circulating pump, the evaporated water is absorbed by a lithium bromide concentrated solution in an absorber H, and the solution is changed into a dilute solution and then enters a low-pressure generator D by a solution pump through a first heat exchanger L. The high-temperature dilute solution is converted into a high-temperature dilute solution after being heated by the low-pressure generator D, the high-temperature dilute solution enters the high-pressure generator A through the second heat exchanger M and the third heat exchanger N respectively, the concentrated solution further is concentrated after being released with redundant water vapor by the second heat exchanger M and the gas-liquid separator B, and then the concentrated solution enters the absorber H after being cooled by the first heat exchanger L, so that the self-spraying and vertical spraying are realized, and the circulation is completed.
Supercooling refrigeration working condition: the first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the seventh valve 7 and the eighth valve 8 are opened, and the fifth valve 5 and the sixth valve 6 are closed.
An external high-temperature heat source is used for supplying heat to the high-pressure generator A to gasify water in the solution, and the water enters the condenser E to be cooled and then is cooled again through the cooling device I. Then flows into the liquid storage device K through throttling and pressure reduction of the first valve 1, is sprayed on a chilled water supply pipe of the evaporator F and a cold water pipe of the subcooler G through a circulating pump, and is collected by a water containing disc to enter the liquid storage device K. And the gasified solution is absorbed by the lithium bromide concentrated solution in the absorber H and then enters the low-pressure generator D through the solution pump via the heat exchanger L after becoming the dilute solution. The low-pressure generator D is heated and then converted into high-temperature dilute solution, and the high-temperature dilute solution enters the high-pressure generator A through the second heat exchanger M and the third heat exchanger N respectively. The concentrated solution passes through the second heat exchanger M and is further concentrated after the redundant water vapor is released in the gas-liquid separator B, and then enters the absorber H after being cooled by the heat exchanger L, so that the self-spraying and vertical spraying are realized, and the circulation is completed.
And meanwhile, refrigerating and heating conditions are as follows: the first valve 1, the second valve 2, the third valve 3, the fifth valve 5, the sixth valve 6, the seventh valve 7 and the eighth valve 8 are opened, and the fourth valve 4 is closed.
An external high-temperature heat source is used for supplying heat to the high-pressure generator A to enable moisture in the solution to be gasified, the water enters the condenser E to be cooled, then is cooled again through the cooling device, and then flows into the liquid storage device K through throttling and pressure reduction of the first valve 1. The refrigerant is sprayed on a chilled water supply pipe of the evaporator F and a cold water pipe of the subcooler G through a circulating pump, is collected by a water containing disc, enters the liquid storage device K, is pumped into the evaporator F through the circulating pump, and is absorbed by a lithium bromide concentrated solution in the absorber H after being gasified. The diluted solution is heated by the low-pressure generator D and then converted into high-temperature diluted solution, and the high-temperature diluted solution enters the high-pressure generator A through the second heat exchanger M and the third heat exchanger N respectively. The concentrated solution passes through the second heat exchanger M and is further concentrated after redundant water vapor is released in the gas-liquid separator B, and then enters the absorber H after being cooled by the first heat exchanger L, so that the self-spraying and vertical spraying are realized, and the circulation is completed; the cooling water side is heated through the absorber H and the condenser E and is supplied to users.
Thus, the evaporator F and the water pipeline of the subcooler G are connected in parallel for operation; the internal energy cascade cooling is realized through each heat exchanger, the unit refrigerating capacity is improved through the subcooler G, and finally, the heat recovery is utilized, so that the overall energy efficiency is improved.
The above detailed description of the present invention is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, i.e. all equivalent changes and modifications made in accordance with the scope of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a high-efficient absorption heat pump, is including cooling tower, condenser, evaporimeter, absorber and solution heat exchanger, and the evaporimeter is connected with user side heat exchanger, and the condenser is connected its characterized in that with absorber and cooling tower: the evaporator and the subcooler are respectively connected with an inlet of the liquid storage device, and a liquid outlet of the liquid storage device is respectively connected with a water collecting tray of the evaporator and the subcooler, so that a liquid circulation structure is formed among the evaporator, the subcooler and the liquid storage device; the liquid outlet pipe of the absorber is connected with the low-pressure generator, and the high-pressure generator, the heat exchanger and the gas-liquid separator form a gas-liquid separation structure and a liquid circulation structure.
2. The high efficiency absorption heat pump of claim 1, wherein: the solution heat exchanger comprises a first heat exchanger, a second heat exchanger and a third heat exchanger, a concentrated solution outlet of the high-pressure generator is connected with the gas-liquid separator through the second heat exchanger, an air outlet pipe of the gas-liquid separator is connected back to the high-pressure generator, a liquid outlet pipe of the gas-liquid separator is connected with the absorber through the first heat exchanger, and the second heat exchanger is also connected with the high-pressure generator through the third heat exchanger.
3. The high efficiency absorption heat pump of claim 2, wherein: the condenser is characterized by further comprising a supercooling device, a refrigerant outlet pipeline of the condenser is connected with the supercooling device, an outlet of the supercooling device is connected with an inlet of the liquid storage device, and a liquid outlet of the liquid storage device is connected with a water collecting tray of the evaporator, the subcooler and the supercooling device through a refrigerant circulating pump, so that the supercooling pipeline forms a closed loop through the supercooling device, the liquid storage device and the subcooler.
4. An efficient absorption heat pump according to claim 3, wherein: the liquid outlet pipe of the absorber is connected with the low-pressure generator through a refrigerant circulating pump.
5. An efficient absorption heat pump according to claim 3, wherein: the liquid outlet pipeline of the high-pressure generator and the liquid outlet pipeline of the gas-liquid separator are respectively connected with a second heat exchanger and a first heat exchanger.
6. An efficient absorption heat pump according to claim 5, wherein: a first valve is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid storage device and the evaporator, and two ends of the first valve are connected in parallel with a solution pump; and a second valve is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid reservoir and the subcooler, and two ends of the second valve are connected in parallel with a solution pump.
7. The high efficiency absorption heat pump of claim 6, wherein: a third valve and a solution pump are arranged between the concentrated solution outlet of the high-pressure generator and the absorber.
8. An efficient absorption heat pump according to claim 7, wherein: a fourth valve is arranged in a connecting pipeline between a cooling water outlet pipeline of the cooling tower and an inlet of the absorber, and an eighth valve is arranged in a connecting pipeline between a dilute solution outlet pipeline of the absorber and an inlet of the gas-liquid separator.
9. An efficient absorption heat pump according to claim 8, wherein: the inlet of the absorber is provided with a fifth valve, and the outlet of the condenser is provided with a sixth valve, so as to form a switching structure for realizing heat recovery.
10. The high efficiency absorption heat pump of claim 9, wherein: and a seventh valve is arranged in a connecting pipeline between a refrigerant outlet pipeline of the liquid accumulator and the supercooling device.
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| CN202121058371.7U CN215002381U (en) | 2021-05-17 | 2021-05-17 | High-efficient absorption heat pump |
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| CN202121058371.7U CN215002381U (en) | 2021-05-17 | 2021-05-17 | High-efficient absorption heat pump |
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| CN215002381U true CN215002381U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091349A (en) * | 2021-05-17 | 2021-07-09 | 中交第四航务工程勘察设计院有限公司 | High-efficient absorption heat pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091349A (en) * | 2021-05-17 | 2021-07-09 | 中交第四航务工程勘察设计院有限公司 | High-efficient absorption heat pump |
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