CN110617651A - Experiment table with coupling ground source heat pump and absorption type refrigeration functions and application thereof - Google Patents
Experiment table with coupling ground source heat pump and absorption type refrigeration functions and application thereof Download PDFInfo
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- CN110617651A CN110617651A CN201910864873.XA CN201910864873A CN110617651A CN 110617651 A CN110617651 A CN 110617651A CN 201910864873 A CN201910864873 A CN 201910864873A CN 110617651 A CN110617651 A CN 110617651A
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- water tank
- heat pump
- ground source
- source heat
- absorption refrigeration
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 64
- 238000005057 refrigeration Methods 0.000 title claims abstract description 64
- 238000002474 experimental method Methods 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 title claims abstract description 20
- 238000010168 coupling process Methods 0.000 title claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 222
- 239000003507 refrigerant Substances 0.000 claims abstract description 22
- 239000006096 absorbing agent Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 16
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 24
- 239000000498 cooling water Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 10
- 239000002440 industrial waste Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- IPLONMMJNGTUAI-UHFFFAOYSA-M lithium;bromide;hydrate Chemical group [Li+].O.[Br-] IPLONMMJNGTUAI-UHFFFAOYSA-M 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- 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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
- F25B25/02—Compression-sorption machines, plants, or systems
-
- 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
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention belongs to the field of teaching experiment platforms, and particularly discloses an experiment table with coupling of a ground source heat pump and an absorption type refrigeration function and application thereof. This test bench includes sharing water tank, ground source heat pump system and absorption refrigeration system, wherein: the common water tank comprises a first water tank and a second water tank; a first heat exchanger in the ground source heat pump system is connected with a first water tank, a second heat exchanger is connected with a second water tank, a compressor is connected with a gas-liquid separator to form internal circulation, and the flowing direction of liquid is controlled by a four-way valve, so that a medium is provided for heat exchange of the first heat exchanger and the second heat exchanger; the absorption refrigeration system comprises a generator, a condenser, an evaporator and an absorber which are sequentially connected along the flowing direction of refrigerant, and a generator side water tank connected with the generator. The ground source heat pump and the absorption refrigeration can be coupled to a test bench, so that the equipment investment and the field occupation in the teaching experiment are effectively reduced, and the teaching effect is not influenced.
Description
Technical Field
The invention belongs to the field of teaching experiment platforms, and particularly relates to an experiment table with coupling of a ground source heat pump and an absorption refrigeration function and application thereof.
Background
The ground source heat pump is a heating and refrigerating system which utilizes underground shallow geothermal resources as cold and heat sources to carry out energy conversion, and a heat exchange medium between the heat pump and the geothermal energy mainly takes a water medium, so that the system is efficient and energy-saving. The soil is used as a heat source or a heat sink, the soil heat exchanger is arranged underground, low-level geothermal energy of the underground is taken out in winter, and the heat pump is used for increasing the temperature to realize heating and hot water supply for the building and storing cold energy for summer; the residual heat in the building is taken out in summer, the building is cooled by being discharged to the underground through the heat pump, and meanwhile, the heat is stored for standby use in winter. The surface shallow layer is a huge energy storage body which can store the energy transferred by the heat pump and realize the alternation and reutilization of cold and heat sources. In recent years, with the shortage of energy, many residential buildings and commercial buildings in China are applied to ground source heat pump systems, which gradually replace the traditional air conditioning systems and are widely applied to the lives of people.
The absorption refrigerating system heats the solution in the generator with heat source to evaporate the low boiling point component part, and the evaporated solution is condensated in the condensator to become liquid, stepped down to evaporating pressure with the throttle valve and evaporated in the evaporator. The evaporated refrigerant vapor is absorbed by the concentrated solution after the generation process is completed, so that the solution is restored to the original concentration again, and then the solution is pumped into the generator to form a complete cycle. The absorption refrigeration system is widely concerned due to the characteristic of directly utilizing low-grade energy sources such as solar energy, geothermal energy, industrial waste heat and the like, and has small noise and small vibration in the operation process. The most widely used absorption refrigerator at present is a water-lithium bromide absorption refrigerator, which uses water as refrigerant and lithium bromide as absorbent to refrigerate by utilizing the phase change process of water.
The ground source heat pump technology and the absorption refrigeration technology are important technologies applied to the refrigeration principle and are important knowledge for professional production teaching of heat energy and power engineering. According to the principles of the ground source heat pump technology and the absorption refrigeration technology, the water tanks required in the two technologies are coupled and shared to form a ground source heat pump technology and absorption refrigeration technology coupling experiment teaching platform, so that the teaching and research requirements of the two technologies are met, and the method plays an important role in deepening the understanding of students on the refrigeration principle and the refrigeration technology. In addition, how to popularize the method into indoor or industrial practical application is also an important research direction and has great research significance.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides the experiment table with the coupling of the ground source heat pump and the absorption type refrigeration function and the application thereof, wherein the ground source heat pump and the absorption type refrigeration water tank are shared, so that the occupied space of the experiment table can be effectively reduced, and the experiment table is particularly suitable for application occasions of production teaching.
To achieve the above object, according to one aspect of the present invention, a laboratory bench for coupling ground source heat pump and absorption refrigeration functions is provided, the laboratory bench comprising a common water tank, a ground source heat pump system and an absorption refrigeration system, wherein:
the shared water tank comprises a first water tank and a second water tank, the first water tank is used as a heat source side water tank of the ground source heat pump system or a cooling water tank of the absorption refrigeration system, and the second water tank is used as a use side water tank of the ground source heat pump system or a use side water tank of the absorption refrigeration system;
the ground source heat pump system comprises a first heat exchanger, a second heat exchanger, a compressor, a gas-liquid separator and a four-way valve, wherein the first heat exchanger is connected with the first water tank, the second heat exchanger is connected with the second water tank, the compressor is connected with the gas-liquid separator to form internal circulation, and the flow direction of liquid is controlled through the four-way valve, so that a medium is provided for heat exchange of the first heat exchanger and the second heat exchanger;
absorption refrigerating system includes along generator, condenser, evaporimeter and the absorber that refrigerant flow direction connected gradually, and with generator side water tank that the generator is connected, be provided with absorbent solution transfer passage between generator and the absorber, and to carrying through the third heat exchanger absorbent solution carries out the heat transfer, the inside pipeline of absorber and condenser with first water tank is connected for carry the cooling water, the inside pipeline of evaporimeter with the second water tank is connected, is used for reducing the temperature of second water tank, thereby realizes refrigeration function.
As a further preferred, the common water tank further comprises a first electric heater disposed inside the first water tank and a second electric heater disposed inside the second water tank for controlling the water temperatures of the first and second water tanks, respectively.
As a further preferred feature, the absorption refrigeration system further includes a third electric heater provided inside the generator-side water tank for controlling the temperature of water in the generator-side water tank.
As a further preferred feature, the common water tank further comprises a first fan coil connected to the first water tank for adjusting the temperature of the water in the first water tank.
Further preferably, the common water tank further includes a second fan coil connected to the second water tank for supplying air to the room to convert the water temperature into the room temperature.
As a further preferred, the absorption refrigeration system uses water as refrigerant and lithium bromide as absorbent.
According to another aspect of the invention, a method for performing an experiment by using the experiment table coupling the ground source heat pump and the absorption refrigeration function is provided, wherein when the ground source heat pump function is realized, the temperature of the buried pipe is simulated by using the first water tank, and the indoor application temperature is simulated by using the second water tank; when the absorption type refrigeration function is realized, the first water tank is used for simulating the temperature of cooling water, the second water tank is used for simulating the indoor temperature, and the generator side water tank is used for simulating the temperature of a heat source.
According to another aspect of the invention, a method for industrial application by using the experiment table for coupling the ground source heat pump and the absorption refrigeration function is provided, wherein when the ground source heat pump function is realized, the first water tank exchanges heat with a buried pipe, heat is provided by using water in the buried pipe, and meanwhile, air is supplied to the indoor by using a second fan coil connected with the second water tank; when the absorption type refrigeration function is realized, solar energy, geothermal energy or industrial waste heat is utilized to supply energy to the generator side water tank, the first water tank is utilized to provide cooling water, and meanwhile, the second fan coil connected with the second water tank is utilized to supply air to the indoor space.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the heat source side water tank and the use side water tank of the ground source heat pump are shared with the absorption type refrigeration cooling water tank and the use side water tank, so that the two systems can be coupled to a laboratory bench, and huge space required by a buried pipe is saved, so that equipment investment and field occupation in teaching experiments are effectively reduced, and the teaching effect is not influenced;
2. in addition, the electric heaters are arranged on the first water tank, the second water tank and the third water tank, so that the experimental conditions can be accurately controlled, and the teaching experimental requirements can be met;
3. particularly, the fan coil is connected with the second water tank, so that the experiment table can be popularized to industrial application, low-grade energy sources such as solar energy, geothermal energy and industrial waste heat are fully utilized, and energy consumption is reduced.
Drawings
Fig. 1 is a laboratory bench for coupling ground source heat pump and absorption refrigeration functions constructed in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the flow direction of the liquid in the first water tank and the second water tank when the laboratory bench provided by the invention works.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-a first water tank, 2-a first electric heater, 3-a first heat exchanger, 4-a second water tank, 5-a second electric heater, 6-a second heat exchanger, 7-a first fan coil, 8-a four-way valve, 9-a compressor, 10-a gas-liquid separator, 11-a generator side water tank, 12-a third electric heater, 13-a condenser, 14-a generator, 15-a third heat exchanger, 16-an evaporator and 17-an absorber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, an embodiment of the present invention provides a laboratory bench for coupling ground source heat pumps and absorption refrigeration functions, where the laboratory bench includes a shared water tank, a ground source heat pump system, and an absorption refrigeration system, where:
the common water tank comprises a first water tank 1 and a second water tank 4, the first water tank 1 is used as a heat source side water tank of a ground source heat pump system or a cooling water tank of an absorption refrigeration system, and the second water tank 4 is used as a use side water tank of the ground source heat pump system or a use side water tank of the absorption refrigeration system;
the ground source heat pump system comprises a first heat exchanger 3, a second heat exchanger 6, a compressor 9, a gas-liquid separator 10 and a four-way valve 8, wherein the first heat exchanger 3 is connected with a first water tank 1, the second heat exchanger 6 is connected with a second water tank 4, the compressor 9 is connected with the gas-liquid separator 10 to form internal circulation, and the flow direction of liquid is controlled by the four-way valve 8, so that a medium is provided for heat exchange of the first heat exchanger 3 and the second heat exchanger 6;
the absorption refrigeration system comprises a generator 14, a condenser 13, an evaporator 16, an absorber 17 and a generator side water tank 11 connected with the generator 14, wherein the generator 14, the condenser 13, the evaporator 16 and the absorber 17 are sequentially connected in the flowing direction of refrigerant, an absorbent solution conveying channel is arranged between the generator 14 and the absorber 17, the conveyed absorbent solution is subjected to heat exchange through a third heat exchanger 15, the inner pipelines of the absorber 17 and the condenser 13 are connected with the first water tank 1 and used for providing cooling water, and the inner pipeline of the evaporator 16 is connected with the second water tank 4 and used for reducing the water temperature of the second water tank 4, so that the refrigeration function is realized.
Furthermore, the shared water tank also comprises a first electric heater 2 arranged in the first water tank 1, a second electric heater 5 arranged in the second water tank 4, a third electric heater 12 arranged in the generator side water tank 11 and a first fan coil 7 connected with the first water tank 1, so that the temperature of water in the water tanks is controlled, working medium water with corresponding temperature can be introduced into the first water tank 1, the second water tank 4 and the generator side water tank 11 during operation, and the temperature of the working medium water can reach the water temperature required by an experiment by combining PID control through the first electric heater 2, the second electric heater 5, the third electric heater 12 and the first fan coil 7.
Further, the common water tank is also provided with a second fan coil connected with the second water tank 4 for supplying air to the room, so that the water temperature is converted into the indoor temperature.
According to another aspect of the invention, a method for performing an experiment by using the experiment table coupling the ground source heat pump and the absorption refrigeration function is provided, when the ground source heat pump function is realized, the temperature of a shallow buried pipe is simulated by using the first water tank 1, and the indoor application temperature is simulated by using the second water tank 4; when the absorption refrigeration function is realized, the temperature of cooling water is simulated by the first water tank 1, the indoor temperature is simulated by the second water tank 4, and the temperature of low-grade heat sources such as water or flue gas is simulated by the generator side water tank 11.
When a ground source heat pump is used for refrigeration, the first heat exchanger 3 is a condenser, the second heat exchanger 6 is an evaporator, the second heat exchanger 6 is used for enabling water in the second water tank 4 to obtain cold energy to cool during working, refrigerant steam in the internal circulation enters the compressor 9 after passing through the gas-liquid separator 10, so that the refrigerant steam is compressed to condensing pressure, heat is transferred to the first water tank 1 through the first heat exchanger 3, the water temperature in the first water tank 1 is increased, and the refrigerant steam is dissipated heat through the first fan coil 7 and is moved to underground water or soil for winter use.
When a ground source heat pump is used for heating, the first heat exchanger 3 is an evaporator, the second heat exchanger 6 is a condenser, the flowing direction of a refrigerant in the internal circulation is reversed through the four-way valve 8 during working, refrigerant steam is condensed in the second heat exchanger 6 to release heat after being compressed by the compressor 9, the heat is absorbed by water in the second water tank 4 to enable the water temperature to rise, the pressure of the refrigerant steam is reduced to evaporation pressure after being throttled by the throttle valve, heat absorption and evaporation are carried out in the first heat exchanger 3 to enable the water temperature in the first water tank 1 to be reduced, and the first electric heater 2 is used for heating the refrigerant.
When the absorption refrigeration function is realized, water is used as a refrigerant, lithium bromide is used as an absorbent, the water is subjected to phase change through the absorption and release of the lithium bromide to the water, simultaneously, along with the heat absorption and heat release processes, the generator side water tank 11 is used as a heat source during the work, high-temperature water is conveyed into the generator 14, so that dilute lithium bromide solution in the generator 14 is heated, the concentrated lithium bromide solution after the evaporation of water vapor is conveyed into the absorber 17, meanwhile, the water vapor is condensed in the condenser 13, the pressure is reduced to evaporation pressure after the throttling of the throttling U pipe and enters the evaporator 16, the evaporation and heat absorption at low pressure reduce the water temperature of the second water tank 4, the refrigeration function is realized, the concentrated lithium bromide solution in the absorber 17 absorbs the water vapor from the evaporator 16 to form dilute lithium bromide solution and conveys the dilute lithium bromide solution into the generator 14, in order to ensure that the absorption process in the absorber 17 is continuously carried out, cooling water is continuously added, and cooling water is also needed by the condenser 13 so as to condense the water vapor from the generator 14, so that the first water tank 1 is connected with the absorber 17 and the condenser 13, and the cooling water flows into the condenser 13 after passing through the absorber 17 and finally returns to the first water tank 1.
According to another aspect of the present invention, there is provided a method for industrial application using the above-mentioned experimental bench for coupling the ground source heat pump and the absorption refrigeration function, when the ground source heat pump function is implemented, the first water tank 1 exchanges heat with the buried pipe, heat is provided by water circulating in the buried pipe, such as water well, lake, river, water in ocean, domestic sewage or industrial wastewater, and simultaneously air is supplied to the indoor by the second fan coil connected to the second water tank 4; when the absorption type refrigeration function is realized, solar energy, geothermal energy or industrial waste heat is used for supplying energy to the generator side water tank 11, the first water tank 1 is used for supplying cooling water, and meanwhile, the second fan coil connected with the second water tank 4 is used for supplying air to the indoor space.
The working process of the experimental bench for coupling the ground source heat pump and the absorption refrigeration function provided by the invention is described in detail below.
When the ground source heat pump function is realized, the valves C1, C2, C5, C6 and C7 are valves for adjusting the flow of water on the heat source side, the valves H1, H2, H5, H6 and H7 are valves for adjusting the flow of water on the use side, the valves are in an open state during operation, and the valves C3, C4, H3 and H4 are drain valves and are in a closed state during operation.
In the absorption refrigeration system, valves C3, C4, C5, C6, and C7 are valves for adjusting the flow rate of cooling water side water, valves H3, H4, H5, H6, and H7 are valves for adjusting the flow rate of water on the use side, valves F1, F2, and F3 are valves for adjusting the flow rate of water on the generator side, valve V2 is a valve for adjusting the recycle rate of the lithium bromide absorption refrigerator, the valves are in an open state when operating, valves C1, C2, H1, and H2 are drain valves, valve V1 is a refrigerant vent valve, valve V3 is a solution vent valve, and the valves are in a closed state when operating.
When a ground source heat pump function is utilized to carry out a heating test in winter, assuming that the indoor environment temperature is 7 ℃, the water temperatures of the second water tank 4 and the first water tank 1 are 18 ℃, the temperature PID table of the second water tank 4 can be set to be 35-40 ℃, the temperature PID table of the first water tank 1 is set to be 20-25 ℃, the first electric heater 2 and the second electric heater 5 are started to raise the temperatures of the first water tank 1 and the second water tank 4 to the set temperatures, and then the experimental system is started to operate, as shown in figure 1, refrigerant vapor is compressed by the compressor 9 and then condensed in the second heat exchanger 6 to release heat, the heat is absorbed by water in the second water tank 4, the temperature of the using side water is raised to 35-40 ℃, the pressure of the refrigerant vapor is reduced to evaporation pressure after throttling by the throttle valve, the refrigerant vapor absorbs heat in the evaporator and evaporates, and the water temperature of the first water tank 1 is.
When the ground source heat pump function is utilized to carry out refrigeration test in summer, the indoor environment temperature is assumed to be 35 ℃, the water temperatures of the second water tank 4 and the first water tank 1 are both 20 ℃, the PID table of the temperature of the second water tank 4 may be set to 20 to 25 c, the PID table of the temperature of the first water tank 1 may be set to 25 to 30 c, the first electric heater 2 and the second electric heater 5 are turned on to raise the temperatures of the first water tank 1 and the second water tank 4 to the set temperatures, and then the experimental system is started to operate, as shown in fig. 1, the flow direction of the refrigerant is reversed through the four-way valve 8, the refrigerant vapor absorbs heat in the second heat exchanger 6 and evaporates, so that the water in the second water tank 4 obtains cold energy to reduce the temperature, enters the compressor 9 through the gas-liquid separator 10 to be compressed to the condensation pressure, condensed by the circulation of water in the first tank 1 in the first heat exchanger 3, the temperature of the water in the first tank 1 rises and flows to the solid line in fig. 2.
When an absorption refrigeration function is utilized for a refrigeration test, assuming that the indoor ambient temperature is 35 ℃, the water temperatures of the second water tank 4 and the first water tank 1 are 20 ℃, the temperature PID table of the second water tank 4 can be set to be 20-25 ℃, the temperature PID table of the first water tank 1 is set to be 15-20 ℃, the temperature PID table of the generator side water tank 11 is set to be 95 ℃, the first electric heater 2 and the second electric heater 5 are started to raise the temperatures of the first water tank 1 and the second water tank 4 to the set temperatures, then the experimental system is started to operate, as shown in fig. 1, the generator side water tank 11 is used as a heat source, high-temperature water is conveyed to the generator 14 by the generator side water pump, lithium bromide solution is heated in the generator 14 to generate steam, the steam is condensed in the condenser 13 through heat exchange with water in the first water tank 1, the pressure is reduced to evaporation pressure after throttling by the throttling U pipe, and enters the evaporator 16, evaporation at low pressure absorbs heat, producing a cooling effect, flowing to the dotted line in figure 2.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a coupling ground source heat pump and absorption refrigeration function's laboratory bench which characterized in that, this laboratory bench includes sharing water tank, ground source heat pump system and absorption refrigeration system, wherein:
the common water tank comprises a first water tank (1) and a second water tank (4), the first water tank (1) is used as a heat source side water tank of the ground source heat pump system or a cooling water tank of the absorption refrigeration system, and the second water tank (4) is used as a use side water tank of the ground source heat pump system or a use side water tank of the absorption refrigeration system;
the ground source heat pump system comprises a first heat exchanger (3), a second heat exchanger (6), a compressor (9), a gas-liquid separator (10) and a four-way valve (8), wherein the first heat exchanger (3) is connected with the first water tank (1), the second heat exchanger (6) is connected with the second water tank (4), the compressor (9) is connected with the gas-liquid separator (10) to form internal circulation, and the flow direction of liquid is controlled through the four-way valve (8), so that media are provided for heat exchange of the first heat exchanger (3) and the second heat exchanger (6);
the absorption refrigeration system comprises a generator (14), a condenser (13), an evaporator (16) and an absorber (17) which are sequentially connected along the flowing direction of a refrigerant, and a generator side water tank (11) connected with the generator (14), an absorbent solution conveying channel is arranged between the generator (14) and the absorber (17), the absorbent solution is conveyed through a third heat exchanger (15) for heat exchange, internal pipelines of the absorber (17) and the condenser (13) are connected with the first water tank (1) and used for conveying cooling water, and an internal pipeline of the evaporator (16) is connected with the second water tank (4) and used for reducing the water temperature of the second water tank (4), so that the refrigeration function is realized.
2. The experimental bench for coupling ground source heat pump and absorption refrigeration function of claim 1, wherein the common water tank further comprises a first electric heater (2) and a second electric heater (5), the first electric heater (2) is disposed inside the first water tank (1), the second electric heater (5) is disposed inside the second water tank (4) for controlling the water temperature of the first water tank (1) and the second water tank (4), respectively.
3. Laboratory bench with coupled ground source heat pump and absorption refrigeration function according to claim 1 or 2, characterized in that the absorption refrigeration system further comprises a third electric heater (12), the third electric heater (12) being arranged inside the generator side water tank (11) for controlling the water temperature of the generator side water tank (11).
4. Laboratory bench with coupled ground source heat pump and absorption refrigeration function according to claim 1, characterized in that said common water tank further comprises a first fan coil (7) connected to said first water tank (1) for regulating the water temperature of said first water tank (1).
5. The laboratory bench with coupling ground source heat pump and absorption refrigeration function as claimed in claim 1, wherein said common water tank further comprises a second fan coil connected to said second water tank (4) for supplying air to the room, thereby converting the water temperature into the room temperature.
6. The experimental bench for coupling ground source heat pump and absorption refrigeration function of claim 1, wherein said absorption refrigeration system uses water as refrigerant and lithium bromide as absorbent.
7. A method for carrying out experiments by using the experiment table for coupling the ground source heat pump and the absorption refrigeration function according to any one of claims 1 to 6, wherein when the ground source heat pump function is realized, the temperature of a buried pipe is simulated by using the first water tank (1), and the indoor application temperature is simulated by using the second water tank (4); when the absorption refrigeration function is realized, the temperature of cooling water is simulated by using the first water tank (1), the indoor temperature is simulated by using the second water tank (4), and the temperature of a heat source is simulated by using the generator side water tank (11).
8. A method for industrial application by using the experiment table for coupling the ground source heat pump and the absorption refrigeration function according to any one of claims 1-6, characterized in that when the ground source heat pump function is realized, the first water tank (1) exchanges heat with a buried pipe, heat is supplied by using water in the buried pipe, and meanwhile, air is supplied to the indoor by using a second fan coil connected with the second water tank (4); when the absorption type refrigeration function is realized, solar energy, geothermal energy or industrial waste heat is utilized to supply energy to the generator side water tank (11), the first water tank (1) is utilized to provide cooling water, and meanwhile, a second fan coil connected with the second water tank (4) is utilized to supply air to the indoor.
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| US4171619A (en) * | 1978-03-16 | 1979-10-23 | Clark Silas W | Compressor assisted absorption refrigeration system |
| CN201314661Y (en) * | 2008-11-10 | 2009-09-23 | 丁力行 | Solar absorption type refrigeration and earth source heat pump coupling and combined supplying system |
| CN203573558U (en) * | 2013-11-11 | 2014-04-30 | 苏州经贸职业技术学院 | Water source heat pump simulation test bench |
| CN105258398A (en) * | 2015-11-11 | 2016-01-20 | 阜新宏利新能源供热有限公司 | Solar/ground source heat pump coupling system in multi-mode efficient operation |
| CN210663445U (en) * | 2019-09-09 | 2020-06-02 | 华中科技大学 | Experiment table coupling ground source heat pump and absorption type refrigeration function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4171619A (en) * | 1978-03-16 | 1979-10-23 | Clark Silas W | Compressor assisted absorption refrigeration system |
| CN201314661Y (en) * | 2008-11-10 | 2009-09-23 | 丁力行 | Solar absorption type refrigeration and earth source heat pump coupling and combined supplying system |
| CN203573558U (en) * | 2013-11-11 | 2014-04-30 | 苏州经贸职业技术学院 | Water source heat pump simulation test bench |
| CN105258398A (en) * | 2015-11-11 | 2016-01-20 | 阜新宏利新能源供热有限公司 | Solar/ground source heat pump coupling system in multi-mode efficient operation |
| CN210663445U (en) * | 2019-09-09 | 2020-06-02 | 华中科技大学 | Experiment table coupling ground source heat pump and absorption type refrigeration function |
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