CN218915450U - Combined cooling heating and power system based on absorption type ground source heat pump - Google Patents
Combined cooling heating and power system based on absorption type ground source heat pump Download PDFInfo
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- CN218915450U CN218915450U CN202223198573.9U CN202223198573U CN218915450U CN 218915450 U CN218915450 U CN 218915450U CN 202223198573 U CN202223198573 U CN 202223198573U CN 218915450 U CN218915450 U CN 218915450U
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Abstract
The utility model discloses a combined cooling heating and power system based on an absorption type ground source heat pump, which relates to the technical field of energy conservation and environmental protection, and particularly comprises a generator set, an absorption type lithium bromide unit, a cooling tower, a heating and refrigerating terminal and a natural gas valve, wherein the generator set is connected with the natural gas valve. According to the combined cooling heating and power system based on the absorption type ground source heat pump, the absorption type ground source heat pump is used as cold-heat-power waste heat utilization equipment, so that the problem of low cold-heat-power combined heating efficiency is effectively solved; and geothermal heat or industrial waste heat resources are fully utilized, the energy-saving and environment-friendly effects are achieved, the generator smoke is recycled to serve as a heat source of the lithium bromide absorption refrigerating unit to perform refrigeration during refrigeration, new equipment is not required to be added when heating is required, and the cooling tower of the original lithium bromide absorption refrigerating unit is partially shielded through a switching valve to perform heating for the absorption heat pump equipment.
Description
Technical Field
The utility model relates to the technical field of energy conservation and environmental protection, in particular to a combined cooling heating and power system based on an absorption type ground source heat pump.
Background
The cold-hot electric system takes natural gas as main fuel to drive gas turbine, micro-combustion engine or internal combustion engine generator and other gas power generation equipment to operate, the generated power supplies the power demand of users, and the waste heat discharged after the system generates power comprises flue gas waste heat and cylinder liner water waste heat and supplies heat and cold to the users through waste heat recycling equipment. By the mode, the primary energy utilization rate of the whole system is greatly improved, and the cascade utilization of energy is realized. And the grid-connected power energy complementation can be provided, so that the economic benefit and the efficiency of the whole system are increased.
The traditional cold and hot electricity waste heat recycling is usually carried out by adopting a lithium bromide absorption refrigerator as refrigeration equipment, heating is usually carried out by exchanging heat between heat of flue gas and cylinder liner water and a heating circulating water loop through heat exchange equipment, heating efficiency is low, and the utilization rate of energy sources is low.
Disclosure of Invention
The utility model provides a combined cooling heating and power system based on an absorption type ground source heat pump, which solves the problems of the background technology.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the combined cooling, heating and power system based on the absorption type ground source heat pump comprises a generator set, an absorption type lithium bromide set, a cooling tower, heating and refrigerating terminals and a natural gas valve, wherein the generator set is connected with the natural gas valve, the generator set is connected with the absorption type lithium bromide set through a smoke circulation loop, the absorption type lithium bromide set can output smoke in the smoke circulation loop, meanwhile, forward and reverse cylinder sleeve water circulation is realized between the generator set and the absorption type lithium bromide set through two cylinder sleeve water circulation loops, the output end of the absorption type lithium bromide set is connected with a heating water circulation loop for forward and reverse water delivery, the two heating water circulation loops are respectively communicated with the heating and refrigerating terminals, a fourth electric three-way valve is directly communicated between the heating water circulation loop for forward water delivery, a bypass of the fourth electric three-way valve is communicated with the cooling tower, a second water pump and a third electric three-way valve are communicated between the heating water circulation loop for reverse water delivery, and the output end of the cooling tower is connected with the bypass of the third electric three-way valve;
and a cold water circulating water loop for forward and reverse water delivery is communicated between the absorption lithium bromide unit and the heating and refrigerating tail end, the cold water circulating water loop for forward water delivery is communicated with a bypass of the first electric three-way valve, a second electric three-way valve and a first water pump are connected to the cold water circulating water loop for reverse water delivery, and the straight ends of the first electric three-way valve and the second electric three-way valve are connected with a ground source water circulating loop for ground source water circulation.
As a combined cooling heating power system based on an absorption type ground source heat pump, the absorption type lithium bromide unit comprises a generator, a condenser, an absorber, an evaporator, a heat exchanger, a solution pump, a refrigerant pump and a throttle valve; the generator and the condenser are mutually communicated through a pipeline, the condenser and the evaporator are connected with a throttle valve through a pipeline, meanwhile, the evaporator is connected with the absorber through a refrigerant pump and a pipeline to form a loop of refrigerant, the absorber is connected with the absorber through a pipeline to form a loop, the absorber is connected with the heat exchanger through a pipeline to form a loop, a solution pump is arranged between the absorber and the heat exchanger, and meanwhile, the absorber is in unidirectional communication with the condenser.
The combined cooling heating and power system based on the absorption type ground source heat pump is further characterized in that the generator is communicated with the smoke circulation loop, and the generator is connected with the forward and reverse cylinder liner water circulation ends of the two cylinder liner water circulation loops.
As a further cooling, heating and power combined supply system based on the absorption type ground source heat pump, the condenser is connected with the output end of the cooling water circulation loop, and the absorber is connected with the input end of the cooling water circulation loop.
As a further cooling heating power combined supply system based on the absorption type ground source heat pump, the evaporator is respectively connected with the input end and the output end of the ground source water circulation loop.
As a cooling-heating-power combined supply system based on the absorption type ground source heat pump, a fan is arranged on the cooling tower for cooling the cooling tower.
As a combined cooling heating power system based on the absorption type ground source heat pump, the electric three-way valve and the water pump are automatically controlled through the PLC control system, and the circulating waterway is automatically switched.
The utility model has the following beneficial effects:
1. according to the combined cooling heating and power system based on the absorption type ground source heat pump, the absorption type ground source heat pump is used as cold-heat-power waste heat utilization equipment, so that the problem of low cold-heat-power combined heating efficiency is effectively solved; and geothermal heat or industrial waste heat resources are fully utilized, the energy-saving and environment-friendly effects are achieved, the generator smoke is recycled to serve as a heat source of the lithium bromide absorption refrigerating unit to perform refrigeration during refrigeration, new equipment is not required to be added when heating is required, and the cooling tower of the original lithium bromide absorption refrigerating unit is partially shielded through a switching valve to perform heating for the absorption heat pump equipment.
Drawings
FIG. 1 is a schematic diagram of a system of the present utility model;
FIG. 2 is a schematic diagram of an absorption lithium bromide unit system according to the present utility model;
FIG. 3 is a schematic diagram of the control box structure of the present utility model;
fig. 4 is a layout of electrical components inside the control box.
In the figure: 1. a generator set; 2. an absorption lithium bromide unit; 2-1, a generator; 2-2, a condenser; 2-3, absorber; 2-4, an evaporator; 2-5, heat exchanger; 2-6, a solution pump; 2-7, a refrigerant pump; 2-8, a throttle valve; 3. a cooling tower; 4. heating and cooling ends; 5. a natural gas valve; 6. a first electric three-way valve; 7. the second electric three-way valve; 8. a first water pump; 9. a second water pump; 10. a third electric three-way valve; 11. a fourth electric three-way valve; 12. a ground source water circulation loop; 13. a cold water circulation water loop; 14. a heating water circulation loop; 15. a cooling water circulation circuit; 16. a flue gas circulation loop; 17. a cylinder liner water circulation loop; 18. a blower.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 2, the present utility model provides a technical solution: the combined cooling, heating and power system based on the absorption type ground source heat pump comprises a generator set 1, an absorption type lithium bromide unit 2, a cooling tower 3, a heating and refrigerating terminal 4 and a natural gas valve 5, wherein the generator set 1 is connected with the natural gas valve 5, the generator set 1 is connected with the absorption type lithium bromide unit 2 through a flue gas circulation loop 16, the absorption type lithium bromide unit 2 can output flue gas in the flue gas circulation loop 16, meanwhile, the generator set 1 and the absorption type lithium bromide unit 2 are also connected with a forward cylinder liner water circulation loop and a reverse cylinder liner water circulation loop through two cylinder liner water circulation loops 17, the output end of the absorption type lithium bromide unit 2 is connected with a heating water circulation loop 14 for forward and reverse water delivery, the two heating water circulation loops 14 are respectively communicated with the heating and refrigerating terminal 4, a fourth electric three-way valve 11 is directly communicated between the heating water circulation loop 14 for forward water delivery, a bypass of the fourth electric three-way valve 11 is communicated with the cooling tower 3, and a second water pump 9 and a third electric three-way valve 10 are communicated between the heating water circulation loop 14 for reverse water delivery, and the output end of the cooling tower 3 is connected with a bypass of the third electric three-way valve 10; a cold water circulating water loop 13 for forward and reverse water delivery is communicated between the absorption lithium bromide unit 2 and the heating and refrigerating tail end 4, the cold water circulating water loop 13 for forward water delivery is communicated with a bypass of the first electric three-way valve 6, a second electric three-way valve 7 and a first water pump 8 are connected to the cold water circulating water loop 13 for reverse water delivery, and the straight ends of the first electric three-way valve 6 and the second electric three-way valve 7 are connected with a ground source water circulating loop 12 for ground source water circulation.
By using the absorption type ground source heat pump as cold-heat-electricity waste heat utilization equipment, the problem of low cold-heat-electricity triple supply heating efficiency is effectively solved; and geothermal heat or industrial waste heat resources are fully utilized, the energy-saving and environment-friendly effects are achieved, the generator smoke is recycled to serve as a heat source of the lithium bromide absorption refrigerating unit to perform refrigeration during refrigeration, new equipment is not required to be added when heating is required, and the cooling tower of the original lithium bromide absorption refrigerating unit is partially shielded through a switching valve to perform heating for the absorption heat pump equipment.
Referring to fig. 1 to 2, an absorption lithium bromide unit 2 includes a generator 2-1, a condenser 2-2, an absorber 2-3, an evaporator 2-4, a heat exchanger 2-5, a solution pump 2-6, a refrigerant pump 2-7, and a throttle valve 2-8; the generator 2-1 and the condenser 2-2 are communicated with each other through a pipeline, the condenser 2-2 and the evaporator 2-4 are connected with a throttle valve 2-8 through a pipeline, meanwhile, the evaporator 2-4 is connected with the absorber 2-3 through a refrigerant pump 2-7 and a pipeline to form a loop of refrigerant, the absorber 2-3 is connected with the absorber 2-5 through a pipeline to form a loop, the absorber 2-3 is connected with the generator 2-1 through a pipeline to form a loop, a solution pump 2-6 is arranged between the absorber 2-3 and the heat exchanger 2-5, and meanwhile, the absorber 2-3 is in unidirectional communication with the condenser 2-2.
Compared with the traditional heating equipment of the combined cooling, heating and power system, the system has the advantages that the smoke-water heat exchanger is directly adopted, the heating efficiency is low, the efficiency can reach 1.7 by taking the absorption type ground source heat pump as the cooling, heating and power heating equipment, and the heating efficiency is improved. The absorption heat pump utilizes the ground source or industrial waste heat, and the heat can be taken out infinitely, so that the absorption heat pump is convenient to popularize and apply. Meanwhile, the waste heat of the generator smoke and the cylinder sleeve water is fully utilized, the purposes of energy conservation and emission reduction are truly achieved, and the efficiency of the unit is improved. The absorption heat pump is operated in a single-effect and double-effect mode, the high-temperature flue gas is discharged from one side of the double effect and releases heat in the high-pressure generator, part of the flue gas enters the low-pressure generator to continuously release heat, in addition, cylinder sleeve water and one side of the low-temperature flue gas are discharged from one side of the single effect and are subjected to heat exchange in the low-pressure generator, the flue gas discharged from the low-temperature heat source can be continuously heated by the heat exchanger, the waste heat of power generation is fully utilized, when heating is needed, the cooling tower of the original lithium bromide absorption refrigerator is partially shielded by the switching valve, new equipment is not needed to be added, the cost is saved, the PLC control system is used for controlling the electric three-way valve, the circulating waterway is automatically switched, the automatic switching between heating and refrigerating is convenient, and the automatic control is realized. Annotate PLC control system for prior art, mainly in order to realize controlling electronic three way valve and water pump, this application does not relate to the technological improvement of washing system.
The generator 2-1 is interconnected with the smoke circulation circuit 16, and the generator 2-1 is interconnected with the forward and reverse cylinder liner water circulation ends of the two cylinder liner water circulation circuits 17.
The condenser 2-2 is connected to the output of the cooling water circulation circuit 15, and the absorber 2-3 is connected to the input of the cooling water circulation circuit 15.
The evaporators 2-4 are connected to the input and output ends of the ground source water circulation circuit 12, respectively.
A fan 18 is installed on the cooling tower 3 for cooling it.
The electric three-way valve and the water pump realize automatic control through a PLC control system, and the circulating waterway is automatically switched.
Referring to fig. 4, wherein: QF1, three-phase circuit breaker, QF2, two-phase circuit breaker, PLC, ohm-dragon CP1H-X40DR-A, TS1, temperature acquisition module 1, TS2, temperature acquisition module 2, TS3, temperature acquisition module 3, TR1, solution pump frequency converter, TR2, coolant pump frequency converter, TR3, cooling tower fan frequency converter, KM1, water pump 1 contactor, KM2, water pump 2 contactor, KM3, vacuum pump contactor, KA1, solenoid valve 5 relay, KA2, three-way valve 6 relay, KA3, three-way valve 7 relay, KA4, three-way valve 10 relay, KA4, three-way valve 11 relay, XA, binding post row.
The following is noted: the PLC control system in fig. 4 includes the above features, which belong to a common control manner in the prior art, and are not specifically improved in the present application, which is not repeated herein.
Referring to fig. 1 to 4, the working principle of the present application is as follows:
when the whole system operates, the valve 5 is opened, natural gas enters the generator set to generate electric energy for supplying power to a control box (see fig. 3) of the combined power supply system, and the redundant electric energy can be used for other links to use electricity and charge a storage battery. When the generator works, high-temperature smoke and cylinder liner water are generated, the smoke enters the absorption type lithium bromide unit 2 through the smoke circulation loop 16, and the cylinder liner water enters the absorption type lithium bromide unit 2 through the cylinder liner water circulation loop 17. And carrying out subsequent refrigeration or heating through the absorption unit.
When the whole system operates, the breaker switch is opened, and the electric energy stored in the storage battery is supplied to the electric cabinet. The mode is switched through a touch screen on the control box, when the working mode is a refrigeration mode, a control instruction is sent out through the PLC, so that the first electric three-way valve 6 and the second electric three-way valve 7 are bypassed, a refrigerant water circulation pipeline is formed, and cold water enters the refrigeration tail end; the fourth electric three-way valve 11 and the third electric three-way valve 10 are bypassed and connected to the cooling tower 3 by pipelines to form a cooling water circulation pipeline.
Clicking a start button, opening a natural gas valve 5, enabling natural gas to enter a generator set, enabling the generator to work normally, generating electric energy for supplying power to a control box of the combined power supply system, and enabling redundant electric energy to be used for power utilization in other links and charging a storage battery. When the generator is stable, generating about 50 ℃ of flue gas, and entering a generator 2-1 high-voltage generator of the lithium bromide absorption unit through a flue gas circulation loop 16; the 90 ℃ cylinder sleeve hot water generated by the generator enters a generator 2-1 low-pressure generator of the lithium bromide absorption unit through a cylinder sleeve water circulation loop 17. The bottom of the generator 2-1 is provided with lithium bromide dilute solution, the unit is in a vacuum state, the evaporation temperature is low, and when a heat source enters into heat exchange, water in the solution is continuously evaporated; along with the evaporation of water, the concentration of the lithium bromide solution in the generator 2-1 is continuously increased, the temperature of the concentrated solution is higher at the moment, the heat exchange is finished again through the heat exchanger 2-5 before the concentrated solution enters the absorber 2-3, the heat is transferred to the generator 2-1, and the concentrated solution enters the absorber 2-3. The evaporated refrigerant vapor enters the condenser 2-2 through the gap above the liquid baffle plate, is cooled by the cooling water in the condenser 2-2 and is condensed to become high-pressure low-temperature liquid refrigerant water. The condensation heat generated in the condensation process is taken away by the cooling water in the cooling water circulation line 15, the cooling water temperature rises, and the cooling water is cooled to the outdoor cooling tower by the cooling fan 18.
After passing through the throttle valve 2-8, the condensed part of the refrigerant water is rapidly expanded and vaporized, and a large amount of heat of the refrigerant water in the evaporator 2-4 is absorbed in the vaporization process, the part of the refrigerant water which is not vaporized flows to the bottom of the evaporator 2-4, and is recycled and sprayed into the evaporator 2-4 through the refrigerant pump 2-7 to continuously absorb the heat of the refrigerant water, so that the purpose of cooling and refrigerating is achieved. The vaporized low-temperature water vapor in the evaporator 2-4 enters the absorber 2-3, is absorbed by the lithium bromide concentrated solution in the absorber 2-3, the concentration of the solution is gradually reduced, and then the solution is sent back to the generator 2-1 by the solution pump 2-6, thus completing the whole cycle.
The touch screen on the control box is switched to a heating mode, and the PLC sends out a control instruction to enable the first electric three-way valve 6 and the second electric three-way valve 7 to be directly connected, so that the first electric three-way valve and the second electric three-way valve are used for being connected with external ground source water and used as an input low-temperature end of the heat pump; the fourth electric three-way valve 11 and the third electric three-way valve 10 are communicated, and the pipeline is not connected with a cooling tower any more, but directly enters the building 4 to form a heating water circulation pipeline which is used as an output high temperature end of the heat pump. And switching the pipeline flow direction through a three-way valve to switch the absorption type lithium bromide refrigerator into an absorption type heat pump.
Under heating working conditions, the generator operates, generated smoke and cylinder liner water enter the lithium bromide absorption unit through the smoke circulation loop 16 and the cylinder liner water circulation loop 17, heat is released in the generator 2-1 of fig. 2, so that dilute solution of the generator 2-1 is heated and concentrated to generate water vapor, the water vapor is sent to the condenser 2-2, the water vapor is condensed after being cooled by low-temperature heating circulating water in the condenser 2-2, a large amount of heat is released in the condensation process, the low-temperature heating circulating water is heated, and the water enters the heating tail end to achieve the heating effect. The condensed liquid water enters the evaporator 2-4 through the throttle valve 2-8, rapidly expands and is vaporized, and a large amount of heat of ground source water or other residual hot water inside and outside the evaporator 2-4 is absorbed in the vaporization process, and the part of the refrigerant water which is not vaporized flows to the bottom of the evaporator 2-4, is recycled and sprayed into the evaporator 2-4 through the refrigerant pump 2-7 to continuously absorb the heat of the ground source water, so that the ground source heat or other residual heat is fully utilized. The liquid water in the evaporator 2-4 absorbs heat and is vaporized into steam which enters the absorber 2-3 to be absorbed, the steam becomes dilute solution after being absorbed by the absorber 2-3, and the dilute solution enters the generator 2-1 through the solution pump 2-6, so that heating circulation is completed.
All the electric valves and the water pumps in the utility model realize automatic control and automatic switching of the circulating waterway through the PLC control system. The PLC adopts an ohm dragon CP1H-X40DR-A model PLC, the temperature module adopts a TS102 four-way temperature acquisition module, a temperature sensor is used for acquiring the temperature of a high-pressure generator, the temperature of a low-pressure generator, the water inlet temperature of an air conditioner, the water outlet temperature of the air conditioner, the temperature of a hot water inlet unit, the temperature of a hot water outlet unit, the flue gas temperature of a generator, the temperature of a flue gas outlet unit, the water inlet temperature of cooling water and the water outlet temperature of cooling water, and the PLC is used for controlling and adjusting the switch of a frequency converter, a shielding pump and a valve to realize an automatic control function. The collected signals are displayed through the touch screen 3-2, so that historical data can be conveniently checked and saved. The PLC and other electrical components are placed within the control box of fig. 4.
Note that: all adopt the pipeline to connect between each subassembly in this application.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a cogeneration system based on absorption formula ground source heat pump, includes generating set (1), absorption formula lithium bromide unit (2), cooling tower (3), heating refrigeration terminal (4) and natural gas valve (5), its characterized in that: the generator set (1) is connected with a natural gas valve (5), the generator set (1) is connected with the absorption lithium bromide unit (2) through a smoke circulation loop (16), the absorption lithium bromide unit (2) can output smoke in the smoke circulation loop (16), meanwhile, the generator set (1) and the absorption lithium bromide unit (2) are also connected with a forward cylinder liner water circulation loop and a reverse cylinder liner water circulation loop through two cylinder liner water circulation loops (17), the output end of the absorption lithium bromide unit (2) is connected with a heating water circulation loop (14) for forward and reverse water delivery, the two heating water circulation loops (14) are respectively communicated with a heating refrigerating end (4), a fourth electric three-way valve (11) is directly communicated between the heating water circulation loop (14) for forward water delivery, a bypass of the fourth electric three-way valve (11) is communicated with the cooling tower (3), a second water pump (9) and a third electric three-way valve (10) are communicated between the heating water circulation loop (14) for reverse water delivery, and the output end of the cooling tower (3) is connected with the bypass of the third electric three-way valve (10);
a cold water circulating water loop (13) for forward and reverse water delivery is communicated between the absorption lithium bromide unit (2) and the heating and refrigerating tail end (4), the cold water circulating water loop (13) for forward water delivery is communicated with a bypass of the first electric three-way valve (6), a second electric three-way valve (7) and a first water pump (8) are connected to the cold water circulating water loop (13) for reverse water delivery, and the through ends of the first electric three-way valve (6) and the second electric three-way valve (7) are connected with a ground source water circulating loop (12) for ground source water circulation.
2. A cogeneration system based on an absorption ground source heat pump as set forth in claim 1 wherein: the absorption lithium bromide unit (2) comprises a generator (2-1), a condenser (2-2), an absorber (2-3), an evaporator (2-4), a heat exchanger (2-5), a solution pump (2-6), a refrigerant pump (2-7) and a throttle valve (2-8); the generator (2-1) and the condenser (2-2) are mutually communicated through a pipeline, the condenser (2-2) and the evaporator (2-4) are connected with a throttle valve (2-8) through a pipeline, meanwhile, a loop of the refrigerant is formed on the evaporator (2-4) through a refrigerant pump (2-7) and the pipeline, the evaporator (2-4) is connected with the absorber (2-3), the absorber (2-3) and the heat exchanger (2-5) are mutually connected through the pipeline and then are connected with the generator (2-1) to form a loop, and a solution pump (2-6) is arranged between the absorber (2-3) and the heat exchanger (2-5), and meanwhile, the absorber (2-3) is in one-way communication with the condenser (2-2).
3. A cogeneration system based on an absorption ground source heat pump as set forth in claim 2 wherein: the generator (2-1) is communicated with the smoke circulation loop (16), and the generator (2-1) is connected with the forward and reverse cylinder liner water circulation ends of the two cylinder liner water circulation loops (17).
4. A cogeneration system based on an absorption ground source heat pump as set forth in claim 2 wherein: the condenser (2-2) is connected with the output end of the cooling water circulation loop (15), and the absorber (2-3) is connected with the input end of the cooling water circulation loop (15).
5. A cogeneration system based on an absorption ground source heat pump as set forth in claim 2 wherein: the evaporators (2-4) are respectively connected with the input end and the output end of the ground source water circulation loop (12).
6. A cogeneration system based on an absorption ground source heat pump as set forth in claim 1 wherein: a fan (18) is arranged on the cooling tower (3) and used for cooling the cooling tower.
7. A cogeneration system based on an absorption ground source heat pump as set forth in claim 1 wherein: the electric three-way valve and the water pump realize automatic control through a PLC control system, and the circulating waterway is automatically switched.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223198573.9U CN218915450U (en) | 2022-12-01 | 2022-12-01 | Combined cooling heating and power system based on absorption type ground source heat pump |
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| CN202223198573.9U CN218915450U (en) | 2022-12-01 | 2022-12-01 | Combined cooling heating and power system based on absorption type ground source heat pump |
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