CN108895710B - Refrigerating and heating system with coupling fuel gas heating function - Google Patents
Refrigerating and heating system with coupling fuel gas heating function Download PDFInfo
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- CN108895710B CN108895710B CN201810908069.2A CN201810908069A CN108895710B CN 108895710 B CN108895710 B CN 108895710B CN 201810908069 A CN201810908069 A CN 201810908069A CN 108895710 B CN108895710 B CN 108895710B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 114
- 239000002737 fuel gas Substances 0.000 title claims abstract description 11
- 230000008878 coupling Effects 0.000 title description 4
- 238000010168 coupling process Methods 0.000 title description 4
- 238000005859 coupling reaction Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 385
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000000498 cooling water Substances 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 239000003345 natural gas Substances 0.000 claims abstract description 61
- 239000008236 heating water Substances 0.000 claims abstract description 31
- 230000001502 supplementing effect Effects 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 20
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000009423 ventilation Methods 0.000 claims description 13
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 description 39
- 239000003570 air Substances 0.000 description 37
- 239000007788 liquid Substances 0.000 description 21
- 238000010586 diagram Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000012080 ambient air Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- 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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
Abstract
The invention discloses a refrigerating and heating system with a coupled fuel gas heating function, which relates to the field of centralized refrigerating and heating systems and comprises a water source heat pump cold and hot water unit I, a cold water circulating pump unit II, a hot water circulating pump unit III, a cooling and heating water circulating pump unit IV, a heat exchanger unit V, at least two water supplementing constant pressure exhaust units VI, a natural gas heating unit VII, a switching valve group VIII, a low-temperature industrial circulating cooling water system IX, an air conditioner tail end device X, a water separator XI and a water collector XII. The invention has the beneficial effects that based on the principle of the water source heat pump cold and hot water unit and combining the energy transfer characteristics of the natural gas heating and air conditioning system refrigerating and heating process, the water source heat pump cold and hot water unit I can be used as a tie, the low-temperature industrial circulating cooling water system IX, the air conditioning terminal device X and the natural gas heating unit VII are integrated together, a small amount of electric energy is consumed, and the heat is mutually transferred in the building, circulating water and natural gas.
Description
Technical Field
The invention relates to the field of centralized refrigeration and heating systems, in particular to a refrigeration and heating system with a coupling fuel gas heating function.
Background
A gas-steam combined cycle power plant uses natural gas as fuel. The gas-steam combined cycle unit generally has certain requirements on the temperature of the inlet natural gas, but the ambient temperature is lower in winter, and the natural gas temperature is further reduced through the decompression process of the pressure regulating station, so that the requirements of the unit on the temperature of the inlet natural gas cannot be met. Therefore, the natural gas entering the unit needs to be heated, and conventional heating schemes include electric heating, water bath furnace heating and the like, and all the heating schemes need to consume a certain amount of energy additionally.
Similar to a wet cooling generator set of a coal-fired power plant, a set of circulating cooling water system for serving a steam turbine and other auxiliary machines also exists in the gas-steam combined cycle power plant, and exhaust steam and some auxiliary mechanical equipment after the steam turbine generates power through circulating water cooling are discharged into ambient air through a heat mass exchange process of the circulating cooling water and air by utilizing the principle of evaporative cooling of water.
In order to maintain normal production or provide comfortable working and living environments for staff, the gas turbine power plant needs to supply cold and/or heat for process buildings and production auxiliary buildings or staff living rest buildings in the production factory according to outdoor weather conditions and production process requirements.
When only the cooling requirement exists in the gas turbine power plant, an air-cooled or cooled tower-type water chiller and an end device applied in association with the air-cooled or cooled tower-type water chiller can be used for cooling building or process equipment. For the air-cooled water chilling unit, the outdoor ambient air temperature is higher in summer, and the condensing temperature is increased, so that the efficiency of the unit is reduced. For the cooling tower type water chilling unit, a corresponding cooling tower and related systems are required to be arranged, so that the investment is increased, and the building space is occupied.
When the fuel gas power plant has the requirements of cooling and heating respectively according to the seasonal characteristics, an air source heat pump cold and hot water unit and an end device applied in association with the air source heat pump cold and hot water unit can be generally selected to supply cold and heat for building or process equipment. However, the outdoor ambient air temperature is lower in winter, the evaporation temperature is reduced, the energy efficiency ratio is also reduced, and the phenomenon of frosting of the evaporator even occurs in certain areas, so that the heating effect is seriously affected; the outdoor ambient air temperature is higher in summer, and the condensing temperature is increased, so that the energy efficiency of the unit is reduced. When the heating medium produced by the boiler is selected for heating, the energy-saving effect is far inferior to that of a heat pump heating system due to the low energy utilization rate of the boiler.
Both the cooling and heating conditions consume certain energy, wherein the energy used for driving the refrigeration or heating equipment is indispensable, and certain waste heat is discharged to the outside for the refrigeration condition, and the part of waste heat belongs to low-quality heat energy which is difficult to reuse.
Disclosure of Invention
The invention aims to reduce energy consumption and designs a refrigeration and heating system with a coupling fuel gas heating function.
The technical scheme includes that the refrigeration heating system with the coupled gas heating function comprises a water source heat pump cold and hot water unit I, a cold water circulating pump unit II, a hot water circulating pump unit III, a cooling and heating water circulating pump unit IV, a heat exchanger unit V, at least two water supplementing constant-pressure exhaust units VI, a natural gas heating unit VII, a switching valve group VIII, a low-temperature industrial circulating cooling water system IX, an air conditioner tail end device X, a water separator XI and a water collector XII, wherein the switching valve group VIII comprises a valve group A, a valve group VIII B, a valve group VIII C, a valve group VIII D, a valve group VIII E, a valve group VIII F, a valve group VIII G, a valve group VIII H, a valve group VIII I, a valve group VIII J, a valve group VIII K, a valve group VIII M and a valve group VIII N; the water source heat pump cold and hot water unit I comprises an outlet IA, an outlet IB, an inlet IA and an inlet IB, wherein the outlet IA is connected with a branch IA, a branch IA and a branch IA, the outlet IB is connected with a branch IB and a branch IB in parallel, the branch IA is communicated with the water separator XI through a valve group VIII D, the branch IA is communicated with the natural gas heating unit VII through a valve group VIII C, the branch IA is communicated with the heat exchanger unit V through a valve group VIII F, the branch IB is communicated with the water separator XI through a valve group VIII A, and the branch IB is communicated with the heat exchanger unit V through a valve group VIII G; the natural gas heating unit VII is characterized in that the outlet end of the natural gas heating unit VII is communicated with the hot water circulating pump unit III, one of the water supplementing constant-pressure exhaust units VI is communicated with the hot water circulating pump unit III, the outlet end of the heat exchanger unit V is communicated with the hot water circulating pump unit III through a valve group VIII and is communicated with the cold water circulating pump unit II through a valve group VIII H, the outlet end of the hot water circulating pump unit III is communicated with the inlet IA, the outlet end of the cold water circulating pump unit II is communicated with the inlet IB, the outlet end of the water separator XI is sequentially communicated with the air conditioner tail end device X and the water collector XII, the outlet end of the water collector XII is communicated with the hot water circulating pump unit III through a valve group VIII, the outlet end of the water collector XII is communicated with the cold water circulating pump unit II through a valve group VIII, the other water supplementing constant-pressure exhaust unit VI is communicated with the cold water circulating pump unit II, and the heat exchanger unit V, the cooling and the low-temperature industrial circulating cooling water system IX form a closed loop.
In addition, other auxiliary pipes, valves, accessories, etc. required for the operation of the system are not described herein. It mainly includes pipes for connecting the various units, various manual and electric valves for regulating and shutting down the system, thermometers and pressure gauges for displaying temperature and pressure, balancing valves for achieving hydraulic balancing of the various end devices and process equipment loops, etc.
Furthermore, the water source heat pump cold and hot water unit I is provided with an outlet IA, an outlet IB, an inlet IA and an inlet IB; each water source heat pump cold and hot water unit connected in parallel in the water source heat pump cold and hot water unit I comprises an evaporator I, a compressor I, a condenser I and an expansion valve I, wherein the evaporator I, the compressor I, the condenser I and the expansion valve I are sequentially communicated in sequence to form a closed loop of refrigerant, the condenser I is further connected with an outlet IA and an inlet IA respectively, and the evaporator I is further connected with an outlet IB and an inlet IB respectively. The type I of the water source heat pump cold and hot water unit is determined by comprehensively comparing the performance price according to the refrigerating and heating quantity range, and the capacity of the total assembly machine is determined according to the calculation load. The machine unit is usually of a vortex type, a piston type, a screw type and a centrifugal type, belongs to complete equipment and can be purchased directly.
Further, the cold water circulating pump unit II is formed by connecting a plurality of sets of cold water circulating pump sets in parallel, and the cold water circulating pump set II comprises a water pump II, a flexible soft connection II, a filter II, a check valve II and a shutoff valve II which are communicated to form a single passage. The main function of the cold water circulating pump unit II is to realize the water circulation between the evaporator I and the air conditioner terminal device X (the summer and spring and autumn partial time periods) and/or the water-water heat exchanger V (spring and autumn and winter). The number and the flow rate of the water pump II are preferably corresponding to those of the water source heat pump cold and hot water unit I, and the lift is determined according to the resistance of the system. The shutoff valve II can be a butterfly valve, a stop valve and the like.
Furthermore, the hot water circulating pump unit III is formed by connecting a plurality of hot water circulating pump sets in parallel, and the hot water circulating pump set III comprises a water pump III, a filter III, a flexible soft connection III, a check valve III and a shutoff valve III which are communicated to form a single passage. The main function of the hot water circulating pump unit III is to realize the water circulation between the condenser I and the natural gas heating device (whole year) or the water separator XI and the water collector XII (winter air conditioner heating). The number and the flow rate of the water pump III are preferably corresponding to those of the water source heat pump cold and hot water unit I, and the lift is determined according to the resistance of the system. The shut-off valve III can be a butterfly valve, a stop valve and the like.
Further, the cooling and heating water circulating pump unit IV comprises a cooling water circulating pump unit IV and a heating water circulating pump unit IV; the cooling water circulating pump unit IV is communicated with the heat exchanger unit V through a valve group VIII J, and the heating water circulating pump unit IV is communicated with the heat exchanger unit V through a valve group VIII K; the cooling water circulating pump unit IV at least comprises two sets of cooling water circulating pump groups IV, the heating water circulating pump unit IV at least comprises two sets of heating water circulating pump groups IV, and the cooling water circulating pump groups IV and the heating water circulating pump groups IV all comprise a water pump IV, a filter IV, a flexible soft connection IV, a check valve IV and a shutoff valve IV which are communicated to form a single passage. The cooling and heating water circulating pump unit IV is divided into two types, one type is the cooling water circulating pump unit IV, the cooling and heating water circulating pump unit IV has the functions of taking water from a circulating water front pool IX, filtering the water, then entering a water-water heat exchanger V to cool hot water, and finally discharging the hot water into a return pipe of the hydraulic professional circulating water through a pipeline; the other type is a heating water circulating pump unit IV, which has the function of taking water from a water return pipe of circulating water, filtering the water, then entering a water-water heat exchanger V to heat cold water, and finally discharging the cold water into a circulating water forehearth IX of a water engineering specialty through a pipeline. The flow of the water pump IV is determined according to the calculated cooling quantity and heating quantity, and the lift is determined according to the resistance of the system. The shutoff valve IV can be a butterfly valve, a stop valve and the like.
Further, the heat exchanger unit V is formed by connecting a plurality of sets of heat exchanger groups V in parallel, and the heat exchanger groups V comprise a water-water heat exchanger V, a shut-off valve V, a thermometer and a pressure gauge. The heat exchanger unit V has the main functions of isolating circulating water in the hydraulic engineering industry from circulating water of other systems, so that heat among the systems is fully exchanged, and the water quality of other closed systems is ensured not to be polluted. The unit can be formed by connecting a plurality of sets of water-water heat exchangers V and shut-off valves V in parallel, the number of the parallel connection is determined according to the heat exchange quantity, and meanwhile, the water-water heat exchangers V are reserved for a certain standby in consideration of the safe operation angle.
Further, the water supplementing constant-pressure exhaust unit VI comprises a normal pressure diaphragm tank VI, a water supplementing pump VI, a water supplementing tank VI, a control unit VI and a desalted water supplementing pipe VI. The water supplementing and constant pressure exhaust unit VI has the main functions of supplementing water, stabilizing pressure, exhausting air and receiving expansion water of a water system. The constant pressure point is arranged at the inlets of the cold water circulating pump unit II and the hot water circulating pump unit III, the constant pressure is determined according to the height of the system, a certain margin is reserved, the water supplementing quantity is usually considered according to the 2% of the circulating water quantity of the system, and the water supplementing source is from a desalted water supplementing pipe provided by a chemical specialty. The device belongs to complete equipment, can be purchased directly, and can also be assembled and connected by each component.
Further, the natural gas heating unit VII is a water-natural gas heat exchange device. The natural gas heating unit VII is a annual heating device, realizes the function of improving the temperature of natural gas, and can adopt a water-natural gas heat exchange device, such as a coil surface heater. According to different seasons, the heating capacity of the heating device is different, the temperature in summer is higher, the temperature of the natural gas is increased along with the temperature, and the heating capacity required for reaching the inlet temperature is minimum; the temperature of the natural gas is reduced along with the lower temperature in winter, and the heating capacity required for reaching the inlet temperature requirement is maximum; the heating quantity required in spring and autumn is centered.
Further, the switching valve group VIII is distributed on pipelines at all positions in the system and mainly comprises a shutoff valve and an electric two-way valve, and part of valve groups further comprise electric regulating valves, and different opening and closing combinations of the valve groups can enable the system to achieve different functions and meet different operation requirements of power plants in different seasons. The valve group comprising the electric regulating valve also has the function of regulating the water quantity.
Further, the low-temperature industrial circulating cooling water system IX comprises a first natural ventilation cooling tower IX, two circulating water tanks IX, a circulating water front tank IX, two circulating water pumps IX, two condensers IX, a second natural ventilation cooling tower IX, a first interlocking valve group IX and a second interlocking valve group IX, wherein the first natural ventilation cooling tower IX and the second natural ventilation cooling tower IX respectively correspond to the circulating water tanks IX, a circulating cooling water supply pipe of the first natural ventilation cooling tower IX is connected with the valve group VIII M and the heating water circulating pump unit IV through the first interlocking valve group IX, and a circulating cooling water supply pipe of the second natural ventilation cooling tower IX is connected with the valve group VIII M and the heating water circulating pump unit IV through the second interlocking valve group IX; each circulating water pond IX is communicated with a circulating water forepond IX; the circulating water front pool IX is sequentially connected with a circulating water pump IX and a condenser IX, and is also communicated with the heat exchanger unit V through a valve group VIII N, and is communicated with the cooling and heating water circulating pump unit IV. The IX main function of the low-temperature industrial circulating cooling water system is to condense the exhaust steam of the steam turbine into water for reuse by the boiler and provide a certain vacuum degree at the exhaust steam of the steam turbine.
Further, the air conditioning terminal device x generally refers to an air conditioning apparatus that uses cold and hot water as a cooling and heating medium, such as a combined air conditioner, a fan coil, a fresh air handling unit, and an air handling unit.
Furthermore, the water separator and the water collector XII are used for distributing and collecting the cold and hot media used by the air conditioner terminal device and play a role in certain pressure balance. The water separator XI and the water collector XII are preferably connected by a pipe and a differential pressure control valve is provided.
Furthermore, the cold water circulating pump unit II is connected with a set of bypass comprehensive water treatment device II in parallel. The device has the functions of treating cold water, maintaining the quality of the cold water, ensuring that the cold water entering the water heat exchanger V and the evaporator I meets the requirement of a unit and equipment on the quality of the water, and protecting the water heat exchanger V and the water source heat pump cold and hot water unit I.
Furthermore, the hot water circulating pump unit III is connected with a set of bypass comprehensive water treatment device III in parallel. The natural gas heating unit VII and the water source heat pump cold and hot water unit I are protected.
The beneficial effects of the invention are as follows:
the water source heat pump cold and hot water unit transfers one part of waste heat in a building or process equipment to the other part of water source for heating natural gas in summer, and heat can be efficiently taken away due to low water source temperature and large specific heat of water; in winter, the water source heat pump cold and hot water unit extracts energy from the water source, and the energy is sent to a building or process equipment and a natural gas heating device after the temperature is raised by the secondary refrigerant according to the heat pump principle. Typically, the water source heat pump cold and hot water unit consumes 1kW of energy, and the air conditioning end device x and/or the natural gas heating device can obtain more than 4kW of heat or cold.
In a fuel gas-steam combined cycle power plant, due to the characteristics of a production process, low-temperature industrial circulating cooling water often exists, and a water source heat pump cold and hot water unit can be selected to utilize the low-temperature industrial circulating cooling water to supply cold or heat for a plant area. The low-temperature industrial circulating cooling water in winter is higher than the ambient air temperature, so that the evaporation temperature is increased, and the energy efficiency ratio is improved; the temperature of the low-temperature industrial circulating cooling water in summer is lower than that of the ambient air, so that the condensing temperature is reduced, and the efficiency of the unit is improved; the water source heat pump supplies heat by using low-temperature industrial circulating cooling water and waste heat in the building, waste heat which is difficult to utilize is recycled to a certain extent, the energy utilization efficiency is improved, and the effects of high efficiency and energy conservation are achieved. Meanwhile, the water source heat pump unit can be used for multiple purposes, can be used for refrigerating and supplying heat, and omits other heat supply systems in specific environments. And moreover, the temperature of the low-temperature industrial circulating cooling water is relatively stable, the heat capacity is huge, the high efficiency and the economy of the system are ensured, and the problems of defrosting in winter and severe working environment of a host machine at high temperature in summer are avoided.
Based on the principle of a water source heat pump cold and hot water unit and combining the energy transfer characteristics of the refrigerating and heating process of a natural gas heating and air conditioning system, the water source heat pump cold and hot water unit I can be used as a tie, the low-temperature industrial circulating cooling water system IX, the air conditioning terminal device X and the natural gas heating unit VII are integrated together, a small amount of electric energy is consumed, heat is transferred to each other in a building, circulating water and natural gas, and compared with the independent conventional systems, energy conservation and consumption reduction can be remarkably realized. By using the system, the heat obtained by the natural gas and the refrigerating and heating quantity of the air conditioner terminal device are several times of the electric energy consumed by the system.
Drawings
FIG. 1 is a schematic diagram of a connection of a refrigeration and heating system coupled with a gas heating function of the present invention;
FIG. 2 is a complete flow diagram of a refrigeration and heating system coupled with a gas heating function in accordance with the present invention;
FIG. 3 is a schematic diagram showing the connection of the water source heat pump hot and cold water unit I in FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of the connection of the cold water circulation pump unit II of FIG. 2 according to the present invention;
FIG. 5 is a schematic diagram showing the connection of the hot water circulation pump unit III of FIG. 2 according to the present invention;
FIG. 6 is a schematic diagram showing the connection of the cooling and heating water circulation pump unit IV in FIG. 2 according to the present invention;
Fig. 7 is a schematic diagram of the connection of the heat exchanger unit v of fig. 2 according to the invention;
FIG. 8 is a schematic diagram showing the connection of the water replenishing constant pressure exhaust unit VI in FIG. 2 according to the present invention;
FIG. 9 is a schematic diagram showing the connection of the natural gas heating unit VII of FIG. 2 according to the present invention;
FIG. 10 is a schematic diagram showing the connection of the low temperature industrial circulating cooling water system IX of FIG. 2 according to the present invention;
FIG. 11 is a schematic diagram showing the connection of the hollow terminal device X, the water distributor XI and the water collector XII in FIG. 2 according to the present invention;
FIG. 12 is a schematic diagram of the connection of the gas heating and air conditioning cooling conditions in summer according to the invention;
FIG. 13 is a schematic diagram showing the connection of the heating and cooling conditions of the air conditioner in spring and autumn according to the invention;
FIG. 14 is a schematic diagram of the connection of the heating conditions of the fuel gas in spring and autumn of the invention;
FIG. 15 is a schematic diagram of the winter gas heating and air conditioning heating conditions connection of the present invention;
FIG. 16 is a schematic diagram of the connection of the cold supply conditions of the air conditioner and the shutdown of the gas turbine according to the invention;
FIG. 17 is a schematic diagram of the connection of the heat supply conditions of the air conditioner and the shutdown of the gas turbine according to the invention.
In the above-mentioned figures of the drawing,
1. a water source heat pump cold and hot water unit I; 101. an evaporator I; 102. a compressor I; 103. a condenser I; 104. an expansion valve I;
2. a cold water circulating pump unit II; 201. a water pump II; 202. a filter II; 203. flexible connection II; 204. a check valve II; 205. closing the valve II; 206. a side-stream integrated water treatment device II;
3. A hot water circulation pump unit III; 301. a water pump III; 302. a filter III; 303. flexible connection III; 304. a check valve III; 305. closing the valve III; 306. a side-stream integrated water treatment unit III;
4. cooling and heating the water circulation pump unit IV; 41. a cooling water circulating pump unit IV; 42. heating a water circulation pump unit IV; 401. a water pump IV; 402. a filter IV; 403. flexible connection IV; 404. a check valve IV; 405. closing the valve IV;
5. a heat exchanger unit V; 501. a water-water heat exchanger V; 502. closing the valve V; 503. a thermometer V; 504. a pressure gauge V;
6. a water supplementing constant pressure exhaust unit VI; 601. a normal pressure diaphragm tank; 602. a water supplementing pump; 603. a water supplementing tank; 604. a control unit;
7. a natural gas heating unit VII;
8. switching a valve group VIII; 801. a valve group VIII A; 802. a valve group VIIIB; 803. a valve group VIII C; 804. a valve group VIII D; 805. a valve group VIII E; 806. a valve group VIII F; 807. a valve group VIII G; 808. valve group VIII H; 809. valve group VIII I; 810. a valve group VIII J; 811. a valve group VIII K; 812. a valve group VIII M; 813. a valve group VIII N;
9. a low temperature industrial circulating cooling water system IX; 901. a first natural draft cooling tower IX; 902. a circulating water tank IX; 903. a circulating water front pool IX; 904. a circulating water pump IX; 905. a condenser IX; 906. a second natural draft cooling tower IX; 907. a first interlock valve group IX; 908. a second interlock valve group IX;
10. An air-conditioning end device X;
11. a water separator XI;
12. a water collector XII.
And (3) pipeline marking: LG-cold water supply pipe, LH-cold water return pipe, RG-hot water supply pipe, RH-hot water return pipe, LQG-cooling water supply pipe, LQH-cooling water return pipe, RYG-heat source water supply pipe, RYH-heat source water return pipe, M-water supplementing pipe.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the accompanying drawings and preferred embodiments:
a refrigerating and heating system coupled with a fuel gas heating function is shown in fig. 1 and 2, and comprises a water source heat pump cold and hot water unit I1, a cold water circulating pump unit II 2, a hot water circulating pump unit III 3, a cooling and heating water circulating pump unit IV 4, a heat exchanger unit V5, at least two water supplementing and constant pressure exhaust units VI 6, a natural gas heating unit VII 7, a switching valve group VIII 8, a low-temperature industrial circulating cooling water system IX 9, an air conditioner tail end device X10, a water separator XI 11 and a water collector XII 12, wherein the switching valve group VIII 8 comprises a valve group VIII A801, a valve group VIII B802, a valve group VIII C803, a valve group VIII D804, a valve group VIII E805, a valve group VIII F806, a valve group VIII G807, a valve group VIII H808, a valve group VIII I809, a valve group VIII J810, a valve group VIII K811, a valve group VIII M812 and a valve group VIII N813; the water source heat pump cold and hot water unit I1 comprises an outlet IA, an outlet IB, an inlet IA and an inlet IB, an outlet IA, a parallel branch IA, a branch IA and a branch IA, an outlet IB, a parallel branch IA and a branch IB, the branch IA is communicated with the water separator XI 11 through a valve group VIII D804, the branch IA is communicated with the natural gas heating unit VII 7 through a valve group VIII C803, the branch IAC is communicated with the heat exchanger unit V5 through a valve group VIII F806, the branch IA is communicated with the water separator XI 11 through a valve group VIII A801, and the branch IB is communicated with the heat exchanger unit V5 through a valve group VIII G807; the outlet end of the natural gas heating unit VII 7 is communicated with the hot water circulating pump unit III 3, the water supplementing constant-pressure exhaust unit VI 6 is communicated with the hot water circulating pump unit III 3, the outlet end of the heat exchanger unit V5 is communicated with the hot water circulating pump unit III 3 through the valve group VIII I809 and is communicated with the cold water circulating pump unit II 2 through the valve group VIII H808, the outlet end of the hot water circulating pump unit III 3 is communicated with the inlet IA, the outlet end of the cold water circulating pump unit II 2 is communicated with the inlet IB, the outlet end of the water separator XI 11 is sequentially communicated with the air conditioner end device X10 and the water collector XII 12, the outlet end of the water collector XII 12 is communicated with the hot water circulating pump unit III 3 through the valve group VIII E805, the outlet end of the water collector XII 12 is communicated with the cold water circulating pump unit II 2 through the valve group VIII B802, the other water supplementing constant-pressure exhaust unit VI 6 is communicated with the cold water circulating pump unit II 2, and the heat exchanger unit V5, the cooling water circulating pump unit IV 4 and the low-temperature industrial circulating cooling water system IX 9 form a closed loop. The specific connection schematic diagrams of the water source heat pump cold and hot water unit I1, the cold water circulating pump unit II 2, the hot water circulating pump unit III 3, the cooling and heating water circulating pump unit IV 4, the heat exchanger unit V5, the water supplementing constant-pressure exhaust unit VI 6, the natural gas heating unit VII 7, the switching valve group VIII 8, the low-temperature industrial circulating cooling water system IX 9, the air conditioner tail end device X10, the water separator XI 11 and the water collector XII 12 are shown in fig. 2 to 11.
The control system mainly comprises a water source heat pump cold and hot water unit I self-contained unit control system, a water supplementing constant-pressure exhaust unit VI self-contained control system, an air conditioner tail end device X self-contained control system and other complete equipment self-contained control systems and a control system for connecting the water source heat pump cold and hot water unit I self-contained control system and the air conditioner tail end device X self-contained control system to perform centralized control, and the centralized control system also receives signals fed back by measuring instruments such as temperature, flow and pressure in a wired or wireless connection mode and controls various water pumps, electric valves, complete equipment and the like to perform relevant actions according to the signals so as to achieve the purpose of automatic control system operation, and reduces manual operation workload.
There are several modes of operation according to seasons.
And (3) a step of: summer gas heating and air conditioner cooling working condition
As shown in fig. 12, in summer, the air conditioning terminal device x 10 has no heat supply requirement and the cooling requirement reaches the maximum design value, and meanwhile, the heat supply required by the natural gas heating unit vii 7 is minimum, at this time, the waste heat discharged by the air conditioning system is insufficient to be fully utilized by the natural gas heating unit vii 7, and the rest of the waste heat is absorbed and discharged by the low-temperature industrial circulating cooling water system ix 9. The system mainly comprises four loops.
Cold water circulation: the cold water prepared by the evaporator I101 is sent to the air conditioner end device X10 through the water separator XI 11 and a pipeline to refrigerate a room and process equipment, the temperature of the cold water after absorbing the residual heat is increased, the cold water returns to the evaporator I101 through the pipeline and the water collector XII 12 cold water circulating pump unit II 2, the absorbed residual heat is released to the refrigerant to reduce the temperature, and the cold water enters the water separator XI 11 again to start a new circulation.
Refrigerant cycle: the low-temperature low-pressure gas-liquid two-phase refrigerant absorbs the waste heat brought by cold water in the evaporator I101 to be changed into low-pressure refrigerant vapor, the low-pressure refrigerant vapor enters the compressor I102, the compressed refrigerant is changed into high-temperature high-pressure vapor, the high-pressure vapor enters the condenser I103, the waste heat and the compressor I102 do work are transferred to hot water through the cooling of the hot water, the high-pressure liquid is condensed by the waste heat and the compressor I102, and the low-temperature low-pressure gas-liquid two-phase state is changed into the low-temperature low-pressure gas-liquid two-phase state after the low-pressure gas-liquid two-phase state is throttled by the expansion valve I104, and the low-pressure gas-liquid two-phase state is reentered into the evaporator I101 to start a new cycle.
Hot water circulation: part of hot water prepared by the condenser I103 enters the natural gas heating unit VII 7 through a pipeline to transfer the waste heat and the work done by the compressor I102 to the natural gas to raise the temperature, the temperature of the hot water is lowered after losing heat, the hot water returns to the condenser I103 through the pipeline and the hot water circulating pump unit III 3, and a new cycle is started by absorbing the waste heat released by the refrigerant and the work done by the compressor I102. The other part of the water enters a heat exchanger unit V5 through a pipeline, the waste heat and the work done by a compressor I102 are transmitted to a low-temperature industrial circulating cooling water system IX 9, the temperature is reduced, the water returns to a condenser I103 through a pipeline and a hot water circulating pump unit III, the waste heat released by the refrigerant is absorbed, the work done by the compressor I102 is increased, a new circulation is started, and the water quantity of the part can be regulated through a valve group VIII I809. The two parts of hot water are separated after exiting the condenser I103 and are combined before entering the hot water circulating pump unit III 3.
Low temperature industrial circulating cooling water circulation: after the heat exchanger unit V5 absorbs the waste heat and the compressor I102 does work, the cooling water is heated, returns to the natural draft cooling tower 901 or (and) 906 to be cooled, and enters the heat exchanger unit V5 to start new circulation through the circulating water tank 902, the circulating water foretank 903 and the cooling and heating water circulating pump unit 4 after the temperature is reduced.
The operation mode does not comprise the shutdown condition of the gas turbine power generation and heat supply unit, and the switching valve group is opened and closed as follows: the opening valve comprises a valve group VIII A801, a valve group VIII B802, a valve group VIII C803, a valve group VIII F806, a valve group VIII I809, a valve group VIII J810 and a valve group VIII M812; the valve groups VIII G807, VIII H808, VIII D804, VIII E805, VIII K811 and VIII N813 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are opened and closed corresponding to the operation or not of the corresponding first natural draft cooling tower IX 901 and second natural draft cooling tower IX 906.
2. Spring and autumn gas heating and air conditioner cooling working condition
As shown in fig. 13, in spring and autumn, the air conditioner terminal device x 10 has no heat supply requirement, only has partial heat supply requirement, and meanwhile, the heat supply required by the natural gas heating unit vii 7 is centered, at this time, the waste heat discharged by the air conditioner system can not meet the heat required by the natural gas heating unit vii 7, and the insufficient heat required for heating the natural gas can be extracted from the low-temperature industrial circulating cooling water system ix 9. The system mainly comprises four loops.
Cold water circulation: part of cold water prepared by the evaporator I101 is sent to an air conditioner terminal device X10 through a water separator XI 11 and a pipeline to refrigerate a room and process equipment, the temperature of the cold water after absorbing waste heat is increased, the cold water returns to the evaporator I101 through the pipeline, a water collector XII 12 and a cold water circulating pump unit II 2, the absorbed waste heat is released to the refrigerant to reduce the temperature, and the cold water enters the water separator XI 11 again to start a new cycle. The other part of the waste heat enters the heat exchanger unit V5 through a pipeline, the temperature of the waste heat of the condenser IX 905 in the low-temperature industrial circulating cooling water is increased, the waste heat is returned to the evaporator I101 through the pipeline and the cold water circulating pump unit II 2, the absorbed waste heat is released to the refrigerant to reduce the temperature and restart the new circulation, and the water quantity of the part can be regulated through the switching valve group 808. The two parts of cold water are separated after exiting the evaporator I101 and are combined before entering the cold water circulating pump unit II 2.
Refrigerant cycle: the low-temperature low-pressure gas-liquid two-phase refrigerant absorbs two waste heat brought by cold water in the evaporator I101 to be changed into low-pressure refrigerant vapor, the low-pressure refrigerant vapor enters the compressor I102, the compressed refrigerant is changed into high-temperature high-pressure vapor, the high-pressure vapor enters the condenser I103, the two waste heat and the compressor I102 do work to be transferred to hot water by being cooled by hot water, the two waste heat and the compressor I102 are condensed into high-pressure liquid, and the high-pressure liquid is throttled by the expansion valve I104 and then becomes a low-temperature low-pressure gas-liquid two-phase state to be reentered into the evaporator I101 to start a new cycle.
Hot water circulation: the hot water prepared by the condenser I103 enters the natural gas heating unit VII 7 through a pipeline to transfer the two waste heat and the work done by the compressor I102 to the natural gas to raise the temperature, the temperature of the hot water is lowered after losing heat, the hot water returns to the condenser I103 through the pipeline and the hot water circulating pump unit III 3, the two waste heat released by the absorbing refrigerant and the work done by the compressor I102 are raised, and a new cycle is started.
Low temperature industrial circulating cooling water circulation: the mode low-temperature industrial circulating cooling water is heat source water of the system. The temperature of the heat source water is reduced after the heat exchanger unit V5 releases the waste heat of the condenser, the heat source water returns to the circulating water forehearth IX 903 for cooling the condenser IX 905, the temperature is increased after the waste heat is absorbed in the condenser IX 905, and the heat source water enters the heat exchanger unit V5 through the cooling and heating water circulating pump unit IV 4 to start new circulation.
The operation mode does not comprise the shutdown condition of the gas turbine power generation and heat supply unit, and the switching valve group is opened and closed as follows: the valve group VIII A801, the valve group VIII B802, the valve group VIII G807, the valve group VIII H808, the valve group VIII C803, the valve group VIII K811 and the valve group VIII N813 are opened; the valve groups VIII D804, VIII E805, VIII F806, VIII I809, VIII J810 and VIII M812 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are opened and closed corresponding to the operation or not of the corresponding first natural draft cooling tower IX 901 and second natural draft cooling tower IX 906.
3. Spring and autumn gas heating working condition
As shown in fig. 14, in spring and autumn, the air conditioner end device x 10 has no cooling and heating requirements, and meanwhile, the heating quantity required by the natural gas heating unit vii 7 is centered, and the heat required for heating the natural gas is extracted from low-temperature industrial circulating cooling water. The system mainly comprises four loops.
Cold water circulation: cold water prepared by the evaporator I101 enters the heat exchanger unit V5 through a pipeline, the temperature of the residual heat of the condenser IX 905 in the low-temperature industrial circulating cooling water is increased, the cold water returns to the evaporator I101 through the pipeline and the cold water circulating pump unit II 2, and the absorbed residual heat is released to the refrigerant to reduce the temperature and restart a new cycle.
Refrigerant cycle: the low-temperature low-pressure gas-liquid two-phase refrigerant absorbs the residual heat of the condenser IX 905 brought by cold water in the evaporator I101 to become low-pressure refrigerant vapor, the low-pressure refrigerant vapor enters the compressor I102, the compressed refrigerant becomes high-temperature high-pressure vapor and then enters the condenser I103, the low-temperature low-pressure gas-liquid two-phase refrigerant is cooled by hot water, the residual heat of the condenser IX 905 and the work of the compressor I102 are transferred to the hot water, the low-temperature low-pressure gas-liquid two-phase refrigerant is condensed into high-pressure liquid, and the high-pressure liquid is throttled by the expansion valve I104 and then becomes a low-temperature low-pressure gas-liquid two-phase state to reenter the evaporator I101 to start a new cycle.
Hot water circulation: the hot water prepared by the condenser I103 enters the natural gas heating unit VII 7 through a pipeline to transfer the residual heat of the condenser IX 905 and the work done by the compressor I102 to the natural gas to raise the temperature of the natural gas, the temperature of the hot water is lowered after losing heat, the hot water returns to the condenser I103 through the pipeline and the hot water circulating pump unit III 3, and the residual heat of the condenser IX 9 released by the absorbing refrigerant and the work done by the compressor I102 are raised to start a new cycle.
Low temperature industrial circulating cooling water circulation: the mode low-temperature industrial circulating cooling water is heat source water of the system. The temperature of the heat source water is reduced after the heat exchanger unit V5 releases the residual heat of the condenser IX 9, the heat source water returns to the circulating water front pool IX 903 for cooling the condenser IX 905, the temperature is increased after the residual heat is absorbed in the condenser IX 905, and the heat source water enters the heat exchanger unit V5 through the cooling and heating water circulating pump unit IV 4 to start a new circulation.
The operation mode does not comprise the shutdown condition of the gas turbine power generation and heat supply unit, and the switching valve group is opened and closed as follows: the valve group VIII C803, the valve group VIII G807, the valve group VIII H808, the valve group VIII K811 and the valve group VIII N813 are opened; the valve group VIII A801, the valve group VIII B802, the valve group VIII D804, the valve group VIII E805, the valve group VIII F806, the valve group VIII I809, the valve group VIII J810 and the valve group VIII M812 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are opened and closed corresponding to the operation or not of the corresponding first natural draft cooling tower IX 901 and second natural draft cooling tower IX 906.
4. Winter gas heating and air conditioner heat supply working conditions
As shown in fig. 15, the air conditioner end device x 10 in winter has no cooling demand but has a heating demand, while the natural gas heating unit vii 7 requires the greatest amount of heat, and the heat required for air conditioning heating and heating the natural gas is extracted from the low-temperature industrial circulating cooling water entirely. The system mainly comprises four loops.
Cold water circulation: cold water prepared by the group evaporator I101 enters the heat exchanger unit V5 through a pipeline, the temperature of the residual heat of the condenser IX 905 in the low-temperature industrial circulating cooling water is increased, the cold water returns to the evaporator I101 through the pipeline and the cold water circulating pump unit 2, and the absorbed residual heat of the condenser IX 905 is released to the temperature of the refrigerant to reduce and restart a new cycle.
Refrigerant cycle: the low-temperature low-pressure gas-liquid two-phase refrigerant absorbs condenser waste heat brought by cold water in the evaporator I101 to be changed into low-pressure refrigerant vapor, the low-pressure refrigerant vapor enters the compressor I102, the compressed refrigerant is changed into high-temperature high-pressure vapor, the high-pressure vapor enters the condenser I103, the condenser waste heat and the compressor work are transferred to hot water through cooling of the hot water, the condenser waste heat and the compressor work are condensed into high-pressure liquid, the high-pressure liquid is throttled by the expansion valve I104 and then is changed into a low-temperature low-pressure gas-liquid two-phase state, and the low-pressure gas-liquid two-phase state is re-entered into the evaporator I101 to start a new cycle.
Hot water circulation: part of hot water prepared by the condenser I103 enters the natural gas heating unit VII 7 through a pipeline to transfer the work of the condenser waste heat and the compressor to the natural gas to raise the temperature of the natural gas, the temperature of the hot water is lowered after losing heat, the hot water returns to the condenser I103 through the pipeline and the hot water circulating pump unit III 3, and the condenser waste heat released by absorbing refrigerant and the work temperature of the compressor are raised to start a new cycle. The other part is sent to the position of an air conditioner tail end device X10 through a water separator 11 and a pipeline to supply heat for rooms and process equipment, the temperature of hot water after the waste heat of a condenser and the work done by a compressor are released is reduced, the hot water returns to a condenser I103 through a pipeline, a water collector XII 12 and a hot water circulating pump unit III 3, the waste heat of the condenser IX 905 released by absorbing the refrigerant and the working temperature rise of the compressor I102 are re-entered into the water separator XI 11 to start a new circulation, and the water quantity of the part can be regulated through a valve group VIII E805. The two parts of hot water are separated after exiting the condenser I103 and are combined before entering the hot water circulating pump unit III 3.
Low temperature industrial circulating cooling water circulation: the mode low-temperature industrial circulating cooling water is heat source water of the system. The temperature of the heat source water is reduced after the heat exchanger unit V5 releases the waste heat of the condenser, the heat source water returns to the circulating water front pool IX 903 for the condenser IX 905, the temperature is increased after the waste heat is absorbed in the condenser IX 905, and the heat source water enters the heat exchanger unit V5 through the cooling and heating water circulating pump unit IV 4 to start new circulation.
The operation mode does not comprise the shutdown condition of the gas turbine power generation and heat supply unit, and the switching valve group is opened and closed as follows: the valve group VIII C803, the valve group VIII D804, the valve group VIII E805, the valve group VIII G807, the valve group VIII H808, the valve group VIII K811 and the valve group VIII N813 are opened; the valve group VIII A801, the valve group VIII B802, the valve group VIII F806, the valve group VIII I809, the valve group VIII J810 and the valve group VIII M812 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are opened and closed corresponding to the operation or not of the corresponding first natural draft cooling tower IX 901 and second natural draft cooling tower IX 906.
5. Fuel engine stop and air conditioner cold or heat supply working condition
When the gas-steam combined cycle unit is out of operation, no natural gas is required, so that the natural gas is not required to be heated. The air conditioner terminal device X10 has a small amount of duty and life cooling and heating requirements in part of the time periods of winter, summer and spring and autumn; the air-conditioning end device X10 in the rest period has no cooling and heating requirements, and the whole system is shut down.
As shown in fig. 16, during cooling, the water source heat pump chiller-heater unit i supplies cold water to the air conditioner end device x 10 and transfers waste heat to low-temperature industrial circulating cooling water, and the cooling water is taken out and discharged in the circulating water front pool ix 903 due to a temporary measure. The on-off state of the mode switching valve group is as follows: the opening valve comprises a valve group VIIIA 801, a valve group VIIIB 802, a valve group VIIIF 806, a valve VIIII 809, a valve group VIIIJ 810 and a valve group VIIIN 813; the valve groups VIII C803, VIII D804, VIII E805, VIII G807, VIII H808, VIII K811 and VIII M812 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are all closed.
As shown in fig. 17, during heat supply, the water source heat pump hot and cold water unit i extracts heat from the low-temperature industrial circulating cooling water to supply hot water to the air conditioner terminal device x 10, and the low-temperature industrial circulating cooling water is taken and discharged in the circulating water front pool ix 903 due to a temporary measure. The on-off state of the mode switching valve group is as follows: the valve group VIII D804, the valve group VIII E805, the valve group VIII G807, the valve group VIII H808, the valve group VIII J810 and the valve group VIII N813 are opened; the valve group VIII A801, the valve group VIII B802, the valve group VIII C803, the valve group VIII F806, the valve VIII I809, the valve group VIII K811 and the valve group VIII M812 are closed. The first interlock valve group IX 907 and the second interlock valve group IX 908 are all closed.
The system can be applied to a gas turbine power plant, and can be used in industries of petrochemical industry, electric power, steel, metallurgy and the like with low-temperature industrial circulating cooling water availability when the air conditioner cooling and heating requirements and the continuous heating requirements are not higher than 55 ℃; in the non-industrial field, the system can be used when low-temperature heat source water is available, and meanwhile, the air conditioner is required for cooling and heating and the continuous heating is not higher than 55 ℃.
The invention has been described above with reference to preferred embodiments, but the scope of the invention is not limited thereto, various modifications may be made thereto and equivalents may be substituted for elements thereof without structural conflict, technical features mentioned in the various embodiments may be combined in any way, and any reference signs in the claims shall not be construed as limiting the claims concerned, the embodiments shall be construed as exemplary and non-limiting in all respects. Therefore, any and all technical solutions falling within the scope of the claims are within the scope of the present invention.
Claims (6)
1. The refrigeration heating system is characterized by comprising a water source heat pump cold and hot water unit I (1), a cold and hot water circulating pump unit II (2), a hot water circulating pump unit III (3), a cooling and heating water circulating pump unit IV (4), a heat exchanger unit V (5), at least two water supplementing and constant pressure exhaust units VI (6), a natural gas heating unit VII (7), a switching valve group VIII (8), a low-temperature industrial circulating cooling water system IX (9), an air conditioner tail end device X (10), a water separator XI (11) and a water collector XII (12), wherein the switching valve group VIII (8) comprises a valve group VIII A (801), a valve group VIII B (802), a valve group VIII C (803), a valve group VIII D (804), a valve group VIII E (805), a valve group VIII F (806), a valve group VIII G (807), a valve group VIII H (808), a valve group VIII I (809), a valve group VIII J (810), a valve group VIII K (811) and a valve group VIII (812);
The water source heat pump cold and hot water unit I (1) comprises an outlet IA, an outlet IB, an inlet IA and an inlet IB, wherein the outlet IA is connected with a branch IA, a branch IA and a branch IA, the outlet IB is connected with a branch IB and a branch IB in parallel, the branch IA is communicated with the water separator XI (11) through a valve group VIII D (804), the branch IA is communicated with the natural gas heating unit VII (7) through a valve group VIII C (803), the branch IAC is communicated with the heat exchanger unit V (5) through a valve group VIII F (806), the branch IA is communicated with the water separator XI (11) through a valve group VIII A (801), and the branch IB is communicated with the heat exchanger unit V (5) through a valve group VIII G (807); the heat exchanger unit V (5) is formed by connecting a plurality of sets of heat exchanger groups V in parallel, and the heat exchanger groups V comprise a water-water heat exchanger V (501), a shut-off valve V (502), a thermometer V (503) and a pressure gauge V (504);
the natural gas heating unit VII (7) is a water-natural gas heat exchange device; the natural gas heating unit VII (7) is communicated with the hot water circulating pump unit III (3) at the outlet end, one water supplementing constant-pressure exhaust unit VI (6) is communicated with the hot water circulating pump unit III (3), the outlet end of the heat exchanger unit V (5) is communicated with the hot water circulating pump unit III (3) through a valve group VIII I (809) and is communicated with the cold water circulating pump unit II (2) through a valve group VIII H (808), the outlet end of the hot water circulating pump unit III (3) is communicated with an inlet IA, the outlet end of the cold water circulating pump unit II (2) is communicated with an inlet IB, the outlet end of the water separator XI (11) is sequentially communicated with an air conditioner tail end device X (10) and a water collector XII (12), the outlet end of the water collector XII (12) is communicated with the hot water circulating pump unit III (3) through a valve group VIII (805), the outlet end of the water collector XII (12) is communicated with the cold water circulating pump unit II (2) through a valve group VIII (802), the water supplementing constant-pressure exhaust unit VI (6) is communicated with the cold water circulating pump unit IV (4), and the water circulating system IV (4) is formed by a closed cooling loop cooling system;
The cold water circulating pump unit II (2) is formed by connecting a plurality of sets of cold water circulating pump sets in parallel, and the cold water circulating pump set II comprises a water pump II (201), a flexible soft connection II (203), a filter II (202), a check valve II (204) and a shutoff valve II (205) which are communicated to form a single passage;
the low-temperature industrial circulating cooling water system IX (9) comprises a first natural ventilation cooling tower IX (901), two circulating water pools IX (902), a circulating water forehearth IX (903), two circulating water pumps IX (904), two condensers IX (905), a second natural ventilation cooling tower IX (906), a first interlocking valve group IX (907) and a second interlocking valve group IX (908), wherein the first natural ventilation cooling tower IX (901) and the second natural ventilation cooling tower IX (906) respectively correspond to one circulating water pool IX (902), a circulating cooling water supply pipe of the first natural ventilation cooling tower IX (901) is connected with a valve group VIII M (812) and a heating water circulating pump unit IV (42) through the first interlocking valve group IX (907), a circulating cooling water supply pipe of the second natural ventilation cooling tower IX (906) is connected with the valve group VIII M (812) and the heating water circulating pump unit IV (42) through the second interlocking valve group IX (908), and each circulating cooling water supply pipe of the first natural ventilation cooling tower IX (903) is communicated with the circulating water forehearth (902); the circulating water front pool IX (903) is sequentially connected with the circulating water pump IX (904) and the condenser IX (905), the circulating water front pool IX (903) is also communicated with the heat exchanger unit V (5) through the valve group VIII N (813), and the circulating water front pool IX (903) is communicated with the cooling and heating water circulating pump unit IV (4).
2. A refrigeration and heating system coupled with a fuel gas heating function according to claim 1, wherein the water source heat pump cold and hot water unit i (1) is provided with an outlet ia, an outlet ib, an inlet ia and an inlet ib; each water source heat pump cold and hot water unit connected in parallel in the water source heat pump cold and hot water unit I (1) comprises an evaporator I (101), a compressor I (102), a condenser I (103) and an expansion valve I (104), wherein the evaporator I (101), the compressor I (102), the condenser I (103) and the expansion valve I (104) are sequentially communicated in sequence to form a closed loop of refrigerant, the condenser I (103) is further connected with an outlet IA and an inlet IA respectively, and the evaporator I (101) is further connected with an outlet IB and an inlet IB respectively.
3. A refrigeration and heating system coupled with a fuel gas heating function according to claim 1, wherein the hot water circulating pump unit iii (3) is formed by connecting several sets of hot water circulating pump sets in parallel, and the hot water circulating pump set iii includes a water pump iii (301), a filter iii (302), a flexible connection iii (303), a check valve iii (304) and a shut-off valve iii (305) which are communicated to form a single passage.
4. A refrigeration and heating system coupled with a fuel gas heating function according to claim 1, wherein the cooling and heating water circulating pump unit iv (4) comprises a cooling water circulating pump unit iv (41) and a heating water circulating pump unit iv (42), the cooling water circulating pump unit iv (41) is communicated with the heat exchanger unit v (5) through a valve group viii J (810), and the heating water circulating pump unit iv (42) is communicated with the heat exchanger unit v (5) through a valve group viii K (811);
The cooling water circulating pump unit IV at least comprises two sets of cooling water circulating pump groups IV, the heating water circulating pump unit IV at least comprises two sets of heating water circulating pump groups IV, and the cooling water circulating pump groups IV and the heating water circulating pump groups IV all comprise a water pump IV (401), a filter IV (402), a flexible soft connection IV (403), a check valve IV (404) and a shutoff valve IV (405) which are communicated to form a single passage.
5. A refrigeration and heating system coupled with a gas heating function according to claim 1, wherein the cold water circulating pump unit ii (2) is connected in parallel with a set of bypass integrated water treatment devices ii (206).
6. A refrigeration and heating system coupled with a gas heating function according to claim 1, wherein the hot water circulation pump unit iii (3) is connected in parallel with a set of bypass integrated water treatment devices iii (306).
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| KR101494659B1 (en) * | 2014-09-19 | 2015-02-17 | 주식회사 휴먼에어텍 | Cooling and heating heat pump device having auxiliary heat exchanger |
| CN204705072U (en) * | 2015-05-20 | 2015-10-14 | 中国电力工程顾问集团西南电力设计院有限公司 | The configuration structure of a kind of power plant central refrigerating heating system |
| CN205066232U (en) * | 2015-05-31 | 2016-03-02 | 上海燃气工程设计研究有限公司 | Ground -source heat pump system for natural gas station |
| CN205481920U (en) * | 2016-01-28 | 2016-08-17 | 沈阳环境科学研究院 | Air conditioner heat pump coupling unit |
| CN105783336A (en) * | 2016-04-29 | 2016-07-20 | 威森节能科技（天津）有限公司 | Composite cold and heat source system with air source heat pump |
| DE102016010254A1 (en) * | 2016-08-26 | 2018-03-01 | Stiebel Eltron Gmbh & Co. Kg | heat pump device |
| CN206504427U (en) * | 2017-02-21 | 2017-09-19 | 江苏省地矿地热能有限公司 | A kind of geothermal heat pump air-conditioning system |
| KR101865557B1 (en) * | 2017-08-30 | 2018-06-08 | 김종헌 | Cooling and simultaneous supply of heating and hot water supply heat pump system |
| CN208688027U (en) * | 2018-08-10 | 2019-04-02 | 青岛艳阳天环保科技有限公司 | A kind of refrigeration heating system coupling gas heating function |
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