CN211977305U - Multi-source coupling cooling and heating system - Google Patents
Multi-source coupling cooling and heating system Download PDFInfo
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- CN211977305U CN211977305U CN201922260742.9U CN201922260742U CN211977305U CN 211977305 U CN211977305 U CN 211977305U CN 201922260742 U CN201922260742 U CN 201922260742U CN 211977305 U CN211977305 U CN 211977305U
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Abstract
The utility model provides a multi-source coupling cooling and heating system, which is used for cooling or heating a cooling and heating unit at a user end and comprises a shallow geothermal utilization unit, a reclaimed water waste heat utilization unit and an industrial waste heat utilization unit; when heating, the shallow geothermal utilization unit is used for exchanging heat with a user side cooling and heating unit firstly; heat exchange is sequentially carried out between the user side cooling and heating unit and the reclaimed water waste heat utilization unit and the industrial waste heat utilization unit; during cooling, the user side cooling and heating unit only sequentially passes through the shallow geothermal utilization unit and the intermediate water waste heat utilization unit to exchange heat, and the industrial waste heat utilization unit only exchanges heat with the intermediate water waste heat utilization unit, so that the recovery and utilization of various low-grade waste heat resources such as the waste heat of an air compressor and the like, shallow geothermal heat, intermediate water waste heat and the like are realized.
Description
Technical Field
The utility model relates to a waste heat comprehensive utilization, concretely relates to take multisource coupling cooling heating system of self-cooling.
Background
The air compressor, the heat pump air conditioning unit and the water treatment unit are common public and auxiliary facilities for each enterprise in an industrial park, and play an important role in ensuring production and life. The internal screw machine of the air compressor and the heat pump air conditioning unit can convert partial mechanical energy into internal energy in the process of compressing a refrigerant or air in the operation process, a large amount of heat is generated, and in order to ensure the normal operation of the unit, circulating cooling water is generally adopted to cool the system.
In order to solve the cooling problem, the conventional scheme is to provide cooling towers for the air compressor and the heat pump air conditioning unit, the circulating cooling water exchanges heat with air under the action of the fan through the cooling towers, and heat carried in the cooling water is discharged to the atmosphere to realize the purpose of cooling. The main drawbacks are the following: the equipment investment of the cooling tower needs to be increased; meanwhile, the electric energy consumption is increased in the operation process of the cooling tower, and the noise is generated by the operation of a cooling fan, so that the environment is influenced; the heat is directly discharged to the atmosphere, so that a great deal of low-grade energy is wasted; cooling towers, especially open cooling towers, consume large amounts of water by evaporation during their operation.
Disclosure of Invention
To the deficiency that prior art exists, the utility model aims to: the utility model provides a multisource coupling cooling heating system of taking self-cooling, mainly solves current public subsidiary facilities such as air compressor machine, heat pump air conditioning unit waste heat rate of utilization low, the problem that the heat extraction of water treatment unit and heat extraction resource are not effectively utilized.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a multi-source coupling cooling and heating system with self-cooling is used for cooling or heating a cooling and heating unit at a user end and comprises a shallow geothermal utilization unit, a reclaimed water waste heat utilization unit and an industrial waste heat utilization unit;
when heating, the shallow geothermal utilization unit is used for exchanging heat with a user side cooling and heating unit firstly; heat exchange is sequentially carried out between the user side cooling and heating unit and the reclaimed water waste heat utilization unit and the industrial waste heat utilization unit;
during cooling, the user side cooling and heating unit only sequentially passes through the shallow geothermal utilization unit and the intermediate water waste heat utilization unit to exchange heat, and the industrial waste heat utilization unit only exchanges heat with the intermediate water waste heat utilization unit.
Specifically, the shallow geothermal heat utilization unit comprises a heat pump water source circulating pump, the intermediate water waste heat utilization unit comprises a regenerated water source heat exchanger, and the industrial waste heat utilization unit comprises an industrial waste heat recovery heat exchanger and a water-cooling heat exchanger;
when the user side cooling and heating unit needs to heat, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger, and exchanges heat with the industrial waste heat utilization unit through the industrial waste heat recovery heat exchanger;
when the user side cooling and heating unit needs cooling, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, and finally exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger; the industrial waste heat utilization unit exchanges heat with the reclaimed water waste heat utilization unit through the water-cooling heat exchanger.
More specifically, when the user side cooling and heating unit does not need heating or cooling, the user side cooling and heating unit does not work, and the industrial waste heat utilization unit exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger or exchanges heat with the shallow geothermal heat utilization unit through the heat pump water source circulating pump.
The user side cooling and heating unit is connected with a heat pump unit, and the heat pump unit is communicated with the shallow geothermal utilization unit or the intermediate water waste heat utilization unit through a main loop valve; the heat pump unit is communicated with the shallow geothermal utilization unit and the intermediate water waste heat utilization unit through a bypass valve.
Specifically, a first cooling return water temperature detector is arranged on the user side cooling and heating unit and used for monitoring the return water temperature of the user side cooling and heating unit and controlling the heat exchange of the regenerated water source heat exchanger through the return water temperature of the user side cooling and heating unit.
The reclaimed water waste heat utilization unit comprises a regenerated water source circulating pump, and the running frequency of the regenerated water source circulating pump is controlled through the backwater temperature of the user side cooling and heating unit.
And a second cooling return water temperature detector is arranged on the industrial waste heat utilization unit and used for monitoring the return water temperature of the industrial waste heat utilization unit and controlling the heat exchange of the reclaimed water waste heat utilization unit or the shallow geothermal utilization unit through the return water temperature of the industrial waste heat utilization unit.
The industrial waste heat utilization unit is provided with a three-way valve which is communicated with an industrial waste heat recovery heat exchanger or a water-cooling heat exchanger.
Optionally, the industrial waste heat utilization unit comprises an air compressor set.
Compared with the prior art, the utility model, following technological effect has:
the utility model discloses a multisource coupling cooling heating system of area self-cooling, realized the industry waste heat such as air compressor machine waste heat, shallow geothermal, the recovery and the utilization of multiple low-grade waste heat resources such as well water waste heat, the heating has been improved, the refrigeration area, the mode that adopts heat pump recovery and well water heat transfer simultaneously has realized the self-cooling between the system, the heat that the air compressor machine discharged is as the heat required heat of heat pump heat supply, if adopt the ground source heat pump simultaneously, if the water yield in main pipe or the pond is great, then can also reduce the quantity of ground buried pipe well, reduce the investment.
The utility model provides an integration solution, multiple functions such as collection process equipment waste heat recovery, system cooling, heat supply refrigeration have replaced the cooling tower through the self-cooling scheme between the system simultaneously, have realized that equipment is intensive, practice thrift the investment and the energy consumption of cooling tower.
Drawings
Fig. 1 is a schematic diagram of the principle of the multi-source coupled cooling and heating system with self-cooling of the present invention.
The meaning of each reference number in the figures is:
the system comprises 1 air conditioner terminal equipment, 2 heat pump units, 3 regeneration water source heat exchangers, 4 heat pump water source circulating pumps, 5 buried pipe systems, 6 reclaimed water pool/main pipe, 7 regeneration water source circulating pumps, 8 water cooling heat exchangers, 9 air compressor units, 10 air compressor cooling water circulating pumps, 11 three-way valves, 12 second cooling return water temperature detectors, 13 industrial waste heat recovery heat exchangers, 14 first cooling return water temperature detectors, 15 bypass valves and 16 main loop valves.
The following detailed description of the present invention will be made with reference to the accompanying drawings.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
In the utility model, the user side cooling and heating unit mainly refers to a unit such as a resident air conditioning unit in life which needs cooling and heating; the shallow geothermal utilization unit is also a shallow geothermal energy utilization unit, and refers to utilization of heat energy resources in the earth with development and utilization values under the current technical and economic conditions within a certain depth range below the earth surface and at the temperature lower than 25 ℃; the reclaimed water waste heat utilization unit is used for reusing reclaimed water waste heat, reclaimed water is reclaimed water, and is called by japan, tap water is generally called as 'upper water', sewage is generally called as 'lower water', and quality of reclaimed water is between the upper water and the lower water, so that the reclaimed water is called as reclaimed water. The industrial waste heat utilization unit is used for utilizing heat energy of industrial waste heat production equipment, waste heat of the air compressor is the most common, and the industrial waste heat utilization unit is used for recovering waste heat of the air compressor to heat cold water.
Example 1:
according to the above technical solution, as shown in fig. 1, the embodiment provides a multi-source coupled cooling and heating system with self-cooling, which is used for cooling or heating a user-side cooling and heating unit, and includes a shallow geothermal utilization unit, a reclaimed water waste heat utilization unit and an industrial waste heat utilization unit;
when heating, the shallow geothermal utilization unit is used for exchanging heat with a user side cooling and heating unit firstly; heat exchange is sequentially carried out between the user side cooling and heating unit and the reclaimed water waste heat utilization unit and the industrial waste heat utilization unit;
during cooling, the user side cooling and heating unit only sequentially passes through the shallow geothermal utilization unit and the intermediate water waste heat utilization unit to exchange heat, and the industrial waste heat utilization unit only exchanges heat with the intermediate water waste heat utilization unit.
Specifically, the shallow geothermal heat utilization unit comprises a heat pump water source circulating pump, the intermediate water waste heat utilization unit comprises a regenerated water source heat exchanger, and the industrial waste heat utilization unit comprises an industrial waste heat recovery heat exchanger and a water-cooling heat exchanger;
when the user side cooling and heating unit needs to heat, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger, and exchanges heat with the industrial waste heat utilization unit through the industrial waste heat recovery heat exchanger;
when the user side cooling and heating unit needs cooling, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, and finally exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger; the industrial waste heat utilization unit exchanges heat with the reclaimed water waste heat utilization unit through the water-cooling heat exchanger.
More specifically, when the user side cooling and heating unit does not need heating or cooling, the user side cooling and heating unit does not work, and the industrial waste heat utilization unit exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger or exchanges heat with the shallow geothermal heat utilization unit through the heat pump water source circulating pump.
The user side cooling and heating unit is connected with a heat pump unit, and the heat pump unit is communicated with the shallow geothermal utilization unit or the intermediate water waste heat utilization unit through a main loop valve; the heat pump unit is communicated with the shallow geothermal utilization unit and the intermediate water waste heat utilization unit through a bypass valve.
Specifically, a first cooling return water temperature detector is arranged on the user side cooling and heating unit and used for monitoring the return water temperature of the user side cooling and heating unit and controlling the heat exchange of the regenerated water source heat exchanger through the return water temperature of the user side cooling and heating unit.
The reclaimed water waste heat utilization unit comprises a regenerated water source circulating pump, and the running frequency of the regenerated water source circulating pump is controlled through the backwater temperature of the user side cooling and heating unit.
And a second cooling return water temperature detector is arranged on the industrial waste heat utilization unit and used for monitoring the return water temperature of the industrial waste heat utilization unit and controlling the heat exchange of the reclaimed water waste heat utilization unit or the shallow geothermal utilization unit through the return water temperature of the industrial waste heat utilization unit.
The industrial waste heat utilization unit is provided with a three-way valve which is communicated with an industrial waste heat recovery heat exchanger or a water-cooling heat exchanger.
Optionally, the industrial waste heat utilization unit comprises an air compressor set.
In an industrial park, a common air compressor is used in cooperation with production, so that the running time is all the year, and the running time of an air conditioning system is divided into a cooling season refrigeration working condition, a heating season heating working condition and a transition season shutdown working condition. Therefore, the operation mode of the scheme is divided into the following three modes:
under the heating mode in winter, the multi-heat-source coupling cooling and heating system with self-cooling mainly achieves the function of heating after recovering waste heat of an air compressor, waste heat of reclaimed water, shallow geothermal heat and the like. The main operation mode is as follows: 15 by-pass valve is closed, 16 main loop valve is opened, 4 heat pump water source circulating pump (or heat pump ground source/water source side circulating pump) runs, air conditioner cooling water absorbs heat after passing through the buried pipe, and the temperature is raised to 8 ℃ from 5 ℃. After passing through a 3 regenerated water source heat exchanger, the temperature is increased from 8 ℃ to 9.5 ℃, and the temperature of a regenerated water source is decreased from 12 ℃ to 9 ℃. After the heat in the regeneration water is extracted, heat exchange is carried out through a 13-air compressor waste heat recovery heat exchanger, and the temperature is raised to 15 ℃. At the moment, the three-way valve 11 is communicated with the air compressor waste heat recovery heat exchanger 13, the temperature of cooling water of the air compressor is cooled through heat exchange, the temperature is reduced to 18 ℃ from 23 ℃, and the cooling water returns to a unit cooling system. The air conditioner cooling water absorbing heat enters a heat pump unit to improve heat supply.
In a summer cold supply mode, the outlet water temperature of a condenser of the heat pump unit is 35 ℃, the outlet water enters a 5-ground buried pipe system for heat exchange under the action of a 4-heat pump water source circulating pump, the temperature is reduced to 30 ℃ after heat exchange, the outlet water passes through a 3-regeneration water source heat exchanger for heat exchange with regenerated water, and the outlet water is cooled to about 28 ℃ again and returns to the 2-heat pump unit for refrigeration. Because the circulating water temperature of the cooling water of the air compressor is high, the outlet water temperature is about 37 ℃, and the cooling water is not suitable for exchanging heat with the cooling water of the heat pump air conditioning system, in the mode, the 11 three-way valve switches the path, so that the cooling water of the air compressor enters the 8 water-cooling heat exchanger and does not enter the 13 waste heat recovery heat exchanger of the air compressor, the cooling water of the air compressor exchanges heat with the regenerated water through the 8 water-cooling heat exchanger, and the cooling water of the air compressor continuously returns to the air compressor for. 14 the effect of first cooling return water temperature detector is for monitoring air conditioner return water temperature, and when the temperature rose, increase 7 the operating frequency of regeneration water source circulating pump, and then increase the water cooling heat transfer ability of regeneration, guarantees that the return water temperature is normal.
Under the non-cooling/hot mode, there is not cold and hot demand this moment, and the heat pump set need not open, in order to satisfy air compressor machine cooling demand, closes 16 major loop valves, opens 15 bypass valves, keeps apart heat pump air conditioning unit short circuit. And 4, starting a heat pump water source circulating pump or a 7 regeneration water source circulating pump, and performing heat exchange and cooling on the air compressor cooling water system by using an underground pipe system or a middle water system. Preferentially using the cooling with lower power consumption in the 4 and 7, carrying out return water temperature detection by a 12 second cooling water return water temperature detector, and starting and automatically adjusting the other path to carry out combined cooling when the temperature is increased and the cooling capacity is insufficient.
The effect proves that:
1. according to the scale estimation of a Shaandrum distributed energy project (the project is a comprehensive energy supply project for Shaandrum power investment construction and mainly comprises functional modules such as cold and hot and compressed air supply of a park, sewage treatment and recycling of the park, a micro-grid and the like, wherein the project is positioned in a Shaandrum power production base and is built and put into use in 2017 in 6 months), the technical scheme can realize the following benefit analysis:
the investment of 2 cooling towers can be reduced, and about 12 ten thousand yuan is saved;
reducing the water supply of the cooling tower by about 2400t/a according to 5.8 yuan/m3The water charge of the system is calculated, and the annual water replenishing cost is saved by about 1.39 ten thousand yuan;
the waste heat recovery capacity is 150kW, the heat supply capacity is improved, and the heating area can be increased by about 3000 square meters.
According to the recycled water amount, the number of geothermal wells of the ground source heat pump can be reduced, and the investment cost of the ground source heat pump is reduced.
2. Meanwhile, the scheme is tested in the multi-source combined supply demonstration project, the cooling tower is turned off and then the ground source backwater is adopted for heat exchange and cooling, the air compressor can run stably, the 'white elimination' of the cooling tower is realized, and the heat discharged by the cooling tower at ordinary times is recovered to provide the heat supply capacity.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is familiar with the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered in the protection scope of the present invention.
Claims (9)
1. A multi-source coupling cooling and heating system is used for cooling or heating a cooling and heating unit at a user side and is characterized by comprising a shallow geothermal utilization unit, a reclaimed water waste heat utilization unit and an industrial waste heat utilization unit;
when heating, the shallow geothermal utilization unit is used for exchanging heat with a user side cooling and heating unit firstly; heat exchange is sequentially carried out between the user side cooling and heating unit and the reclaimed water waste heat utilization unit and the industrial waste heat utilization unit;
during cooling, the user side cooling and heating unit only sequentially passes through the shallow geothermal utilization unit and the intermediate water waste heat utilization unit to exchange heat, and the industrial waste heat utilization unit only exchanges heat with the intermediate water waste heat utilization unit.
2. The multi-source coupled cooling and heating system according to claim 1, wherein the shallow geothermal utilization unit comprises a heat pump water source circulating pump, the intermediate water waste heat utilization unit comprises a regenerated water source heat exchanger, and the industrial waste heat utilization unit comprises an industrial waste heat recovery heat exchanger and a water cooling heat exchanger;
when the user side cooling and heating unit needs to heat, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger, and exchanges heat with the industrial waste heat utilization unit through the industrial waste heat recovery heat exchanger;
when the user side cooling and heating unit needs cooling, the user side cooling and heating unit exchanges heat with the shallow geothermal utilization unit through the heat pump water source circulating pump, and finally exchanges heat with the reclaimed water waste heat utilization unit through the regenerated water source heat exchanger; the industrial waste heat utilization unit exchanges heat with the reclaimed water waste heat utilization unit through the water-cooling heat exchanger.
3. The multi-source coupled cooling and heating system of claim 1, wherein when the user-side cooling and heating unit does not need to heat or cool, the user-side cooling and heating unit does not operate, and the industrial waste heat utilization unit exchanges heat with the recycled water waste heat utilization unit through the regenerated water source heat exchanger or exchanges heat with the shallow geothermal heat utilization unit through the heat pump water source circulating pump.
4. The multi-source coupled cooling and heating system of claim 1, wherein the user side cooling and heating unit is connected to a heat pump unit, and the heat pump unit is connected to a shallow geothermal utilization unit or a middle water waste heat utilization unit through a main loop valve; the heat pump unit is communicated with the shallow geothermal utilization unit and the intermediate water waste heat utilization unit through a bypass valve.
5. The multi-source coupled cooling and heating system according to claim 1, wherein the user side cooling and heating unit is provided with a first cooling return water temperature detector for monitoring the return water temperature of the user side cooling and heating unit, and the heat exchange of the regenerated water source heat exchanger is controlled by the return water temperature of the user side cooling and heating unit.
6. The multi-source coupled cooling and heating system according to claim 5, wherein the recycled water waste heat utilization unit comprises a regenerated water source circulating pump, and the operation frequency of the regenerated water source circulating pump is controlled by the return water temperature of the user-side cooling and heating unit.
7. The multi-source coupled cooling and heating system of claim 1, wherein the industrial waste heat utilization unit is provided with a second cooling return water temperature detector for monitoring the return water temperature of the industrial waste heat utilization unit and controlling the heat exchange of the reclaimed water waste heat utilization unit or the shallow geothermal heat utilization unit according to the return water temperature of the industrial waste heat utilization unit.
8. The multi-source coupled cooling and heating system according to claim 1, wherein the industrial waste heat utilization unit is provided with a three-way valve, and the industrial waste heat recovery heat exchanger or the water-cooled heat exchanger is communicated through the three-way valve.
9. The multi-source coupled cooling and heating system of claim 1, wherein the industrial waste heat utilization unit comprises an air compressor unit.
Priority Applications (1)
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| CN201922260742.9U CN211977305U (en) | 2019-12-16 | 2019-12-16 | Multi-source coupling cooling and heating system |
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| CN201922260742.9U CN211977305U (en) | 2019-12-16 | 2019-12-16 | Multi-source coupling cooling and heating system |
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| CN211977305U true CN211977305U (en) | 2020-11-20 |
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