Gas-electricity complementary cold and heat combined supply system

Abstract

The utility model discloses a gas-electric complementary cold and heat combined supply system which comprises a first heat pump mechanism, a second heat pump mechanism, a first water flow pipeline and a second water flow pipeline. The first water flow pipeline is connected with the first heat pump mechanism and the second heat pump mechanism, and the second heat pump mechanism is further connected with the second water flow pipeline. The first water flow pipeline is used for absorbing heat of the first heat pump mechanism and heating the second heat pump mechanism, and the second water flow pipeline is used for absorbing heat of the second heat pump mechanism. According to the scheme, the first heat pump mechanism and the second heat pump mechanism achieve effective utilization of energy in a heat exchange mode, the working efficiency of the first heat pump mechanism and the second heat pump mechanism is improved, meanwhile, use of a cooling tower is reduced, the occupied area of cooling tower equipment and the equipment cost are reduced, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy equipment, in particular to a gas-electricity complementary cooling and heating combined supply system. Background Art

[0002] Meat processing plants, slaughterhouses, dairy processing plants, and other food production and processing enterprises require cold storage and high-temperature hot water. They are typically equipped with both refrigeration and air conditioning systems and high-temperature heat pumps to meet these demands. Despite the dual use of refrigeration and air conditioning systems, existing refrigeration and air conditioning systems cannot achieve sufficient cooling temperatures for some specialized production processes, while the hot water provided by the high-temperature heat pump is not sufficiently hot. Furthermore, the refrigeration and air conditioning systems require a separate cooling tower to cool the condenser, increasing the equipment footprint and production costs.

[0003] Therefore existing technology still needs to be improved and improved. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a gas-electricity complementary cooling and heating system to solve the problem in the prior art that there is no equipment that occupies a small area, is low in cost and can simultaneously provide cooling and high-temperature hot water.

[0005] The technical solution of the utility model is as follows:

[0006] a first heat pump mechanism, a second heat pump mechanism, a first water flow pipeline, and a second water flow pipeline;

[0007] The first water flow pipeline is connected to the first heat pump mechanism and the second heat pump mechanism respectively, and the second heat pump mechanism is also connected to the second water flow pipeline;

[0008] The first water flow pipeline is used to absorb heat from the first heat pump mechanism and heat the second heat pump mechanism, and the second water flow pipeline is used to absorb heat from the second heat pump mechanism.

[0009] In the above scheme, the first heat pump mechanism and the second heat pump mechanism provide the excess heat generated by the first heat pump mechanism to the second heat pump mechanism that needs heat through heat exchange, and provide the excess cold air generated by the second heat pump mechanism to the first heat pump mechanism through heat exchange.

[0010] Furthermore, the gas-electricity complementary cooling and heating system further comprises: a gas mechanism;

[0011] The gas mechanism and the second heat pump mechanism are connected via the second water flow pipeline, and the cold water in the second water flow pipeline is heated by the second heat pump mechanism and the gas mechanism in sequence and then discharged.

[0012] In the above scheme, the cold water entering the water inlet pipe first absorbs heat in the high-temperature working area and is elevated to medium-temperature hot water. It is then heated by the gas mechanism, and the gas mechanism is used to further raise the water temperature to 95 degrees. Finally, the hot water is discharged through the outlet pipe.

[0013] Furthermore, the gas-electricity complementary cooling and heating system further includes a heat exchange mechanism, and the first water flow pipeline is further connected to the heat exchange mechanism;

[0014] The gas mechanism further includes a flue gas pipe, which is connected to the heat exchange mechanism;

[0015] The first water flow pipeline absorbs heat in the flue gas pipe at the heat exchange mechanism.

[0016] In the above solution, the flue gas pipe is connected to the exhaust port of the gas mechanism, and heat exchange is performed between the heat exchange mechanism and the first water flow pipeline to recycle the waste heat of the flue gas generated by the gas mechanism.

[0017] Furthermore, the first heat pump mechanism includes: a first compressor, a first throttle valve, a first condenser and a first refrigerant pipeline;

[0018] The first refrigerant pipeline is sequentially connected to the first compressor, the first condenser, the first throttle valve and the air cooler to form a first refrigerant circuit.

[0019] In the above solution, the first water flow pipeline plays the role of a cooling tower, saving the equipment floor space and use cost of the cooling tower. At the same time, the first water flow pipeline can also recycle the heat released by the first condenser, avoiding energy waste.

[0020] Furthermore, the second heat pump mechanism includes: a second refrigerant pipeline and a second compressor, a second condenser, a second throttle valve and an evaporator connected in sequence through the second refrigerant pipeline, forming a second refrigerant circuit.

[0021] In the above solution, the evaporator further increases the temperature of the refrigerant by absorbing the heat released by the first condenser and the waste heat of the flue gas, thereby improving the compression efficiency of the compressor and reducing the energy consumption in the high-temperature working area.

[0022] Furthermore, the first condenser, the evaporator and the heat exchange mechanism are connected via the first water flow pipeline to form a first water flow loop, and the first water flow loop performs heat exchange with the first condenser, the evaporator and the heat exchange mechanism respectively.

[0023] In the above scheme, the first water flow circuit absorbs the heat dissipation of the first condenser and the heat of the flue gas, and provides the absorbed heat to the second refrigerant circuit at the evaporator, thereby reducing the energy consumption of the second refrigerant circuit. At the same time, the first water flow circuit lowers the temperature at the evaporator and flows back to the first condenser to absorb the heat released by the first refrigerant circuit, thereby reducing the energy consumption of the first refrigerant circuit.

[0024] Furthermore, the second water flow pipeline is connected to the second condenser and the gas mechanism in sequence, and the cold water in the second water flow pipeline is heated by the second condenser and the gas mechanism in sequence and then discharged.

[0025] In the above scheme, the second condenser first raises the cold water in the second water flow pipe to medium-temperature hot water, and then uses the gas mechanism to further raise the water temperature to 95 degrees high-temperature hot water to meet the user's demand for high-temperature hot water.

[0026] Furthermore, the first compressor is a screw compressor.

[0027] Furthermore, the second compressor is a screw compressor.

[0028] In the above scheme, the screw compressor has high reliability, is easy to operate and maintain, and is small in size, light in weight, and occupies a small area, which facilitates the operation of the combined power supply system.

[0029] Furthermore, the gas-electricity complementary cooling and heating system further includes: a skid frame, which is used to install the gas mechanism, the heat pump mechanism and the heat exchange mechanism.

[0030] In the above solution, the skid facilitates the transportation and installation of the cogeneration system, enabling it to be deployed and used more efficiently.

[0031] Compared with the existing technology, this solution proposes a gas-electricity complementary combined heat and cold supply system. The first heat pump mechanism and the second heat pump mechanism provide the excess heat generated by the first heat pump mechanism to the second heat pump mechanism that needs heat through heat exchange, and provide the excess cold air generated by the second heat pump mechanism to the first heat pump mechanism through heat exchange, thereby realizing effective energy utilization, improving the working efficiency of the first heat pump mechanism and the second heat pump mechanism, and saving the use of cooling towers, saving the floor space and equipment cost of cooling tower equipment, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of a gas-electricity complementary cooling and heating system of the utility model. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of an embodiment of a gas-electricity complementary cooling and heating system of the utility model. Figure 2 ;

[0034] Figure 3 for Figure 1 The working principle diagram of the gas-electricity complementary cooling and heating system shown;

[0035] The numbers in the figure are: 1. heat pump mechanism; 11. first compressor; 12. first condenser; 13. first throttle valve; 2. second heat pump mechanism; 21. second compressor; 22. second condenser; 23. second throttle valve; 24. evaporator; 3. heat exchange mechanism; 4. gas mechanism; 41. flue gas pipe; 5. first water flow pipeline; 6. second water flow pipeline. DETAILED DESCRIPTION

[0036] The present invention provides a gas-electricity complementary cooling and heating system and a gas-electricity complementary cooling and heating system. To make the purpose, technical solution, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] Users who need both deep cooling (-18°C) and high-temperature hot water (95°C) need to be equipped with both refrigeration and air conditioning and heat pump heating. However, the cooling and heating effects of the air conditioner and heat pump cannot meet the usage requirements. The refrigeration and air conditioning also need to be equipped with a separate cooling tower for cooling, which increases the equipment's footprint and the company's production costs.

[0038] In order to solve the above technical problems, the present invention provides a structure and technical solution for a gas-electricity complementary cooling and heating system, as shown in the following embodiments.

[0039] like Figure 1 As shown, the gas-electricity complementary cooling and heating system mentioned in this solution specifically includes: a first heat pump mechanism 1, a second heat pump mechanism 2, a first water flow pipeline 5 and a second water flow pipeline 6;

[0040] The first water flow pipeline 5 is connected to the first heat pump mechanism 1 and the second heat pump mechanism 2 respectively, and the second heat pump mechanism 2 is also connected to the second water flow pipeline 6;

[0041] The first water flow pipeline 5 is used to absorb heat from the first heat pump mechanism 1 and heat the second heat pump mechanism 2 , and the second water flow pipeline 6 is used to absorb heat from the second heat pump mechanism 2 .

[0042] like Figure 3As shown, the first heat pump mechanism 1 is the low-temperature working area, and the second heat pump mechanism 2 is the high-temperature working area. The low-temperature working area generates cold air, and the high-temperature working area releases heat to heat the cold water in the second water flow pipeline. Heat exchange is then performed between the low-temperature and high-temperature working areas via the heat exchange mechanism 3. The first heat pump mechanism 1 and the second heat pump mechanism 2 are connected by a first water flow pipeline 5 to form a first water flow loop. When the first water flow loop passes through the low-temperature working area, it absorbs excess heat generated in the low-temperature working area, acting as a cooling tower. When the first water flow loop passes through the high-temperature working area, it provides the absorbed excess heat to the high-temperature working area for operation, while absorbing the cold air released by the high-temperature working area, recooling the hot water in the first water flow loop, and then flows through the low-temperature working area again to absorb heat. The first heat pump mechanism 1 and the second heat pump mechanism 2 provide the excess heat generated by the first heat pump mechanism 1 to the second heat pump mechanism 2 that needs heat through heat exchange, and provide the excess cold air generated by the second heat pump mechanism 2 to the first heat pump mechanism 1 through heat exchange, thereby realizing effective energy utilization, improving the working efficiency of the first heat pump mechanism 1 and the second heat pump mechanism 2, and saving the use of cooling towers, saving the floor space and equipment cost of cooling tower equipment, thereby reducing production costs.

[0043] The gas-electricity complementary cooling and heating system also includes: a gas mechanism 4; the gas mechanism 4 and the second heat pump mechanism 2 are connected through the second water flow pipeline 6, and the cold water in the second water flow pipeline 6 is heated in turn by the second heat pump mechanism 2 and the gas mechanism 4 and then discharged.

[0044] like Figure 2 As shown, the cold water entering the water inlet pipe first absorbs heat in the high-temperature working area and is elevated to medium-temperature hot water. It is then heated by the gas mechanism 4, and the gas mechanism 4 is used to further raise the water temperature to 95 degrees. Finally, the hot water is discharged through the water outlet pipe.

[0045] Optionally, the fuel of the gas mechanism 4 includes but is not limited to natural gas, liquefied gas, biogas, etc.

[0046] The gas-electricity complementary cooling and heating system further includes a heat exchange mechanism 3, and the first water flow pipeline 5 is also connected to the heat exchange mechanism 3;

[0047] The gas mechanism further includes a flue gas pipe 41, which is connected to the heat exchange mechanism 3;

[0048] The first water flow pipeline 5 absorbs heat in the flue gas pipe 41 at the heat exchange mechanism.

[0049] like Figure 3 As shown, the flue gas pipe 41 is connected to the exhaust port of the gas mechanism 4, and performs heat exchange with the first water flow pipeline 5 in the heat exchange mechanism 3 to recycle the waste heat of the flue gas generated by the gas mechanism 4.

[0050] It can be understood that the direction of water flow in the first water flow pipeline is the first condenser 12, the heat exchange mechanism 3 and the evaporator 24 in sequence, and then returns to the first condenser 12.

[0051] The first heat pump mechanism 1 includes: a first compressor 11, a first throttle valve 13, a first condenser 12 and a first refrigerant pipeline; the first refrigerant pipeline sequentially connects the first compressor 11, the first condenser 12, the first throttle valve 13 and the air cooler to form a first refrigerant circuit.

[0052] In the first refrigerant circuit, the air cooler acts as the evaporator 24, utilizing the evaporation of the refrigerant to absorb heat and lower its temperature. The evaporated refrigerant is compressed by the first compressor 11, increasing its temperature and pressure before entering the condenser for liquefaction. During liquefaction, the refrigerant releases heat to the cold water in the first water flow line 5. The liquid refrigerant is then throttled and depressurized by the first throttle valve 13 before reentering the air cooler for the next cycle. The first water flow line 5 acts as a cooling tower, saving both the equipment footprint and operating costs of the cooling tower. Furthermore, the first water flow line 5 can recycle the heat released by the first condenser 12, avoiding energy waste.

[0053] The second heat pump mechanism 2 includes a second refrigerant pipeline and a second compressor 21 , a second condenser 22 , a second throttle valve 23 and an evaporator 24 sequentially connected through the second refrigerant pipeline, forming a second refrigerant circuit.

[0054] In the second refrigerant circuit, evaporator 24 absorbs heat from the first water flow line 5, causing the refrigerant to evaporate. The evaporated refrigerant is compressed by the second compressor 21, increasing its temperature and pressure. It then enters the condenser and liquefies, releasing heat to the cold water in the second water flow line. After throttling and reducing its pressure through the second throttle valve 23, the liquid refrigerant re-enters evaporator 24 for the next cycle. The heat in the first water flow line 5 includes heat released by the first condenser 12 and waste heat from the flue gas of the gas generator 4. By absorbing this heat and waste heat from the first condenser 12, evaporator 24 further raises the refrigerant temperature, thereby improving the compressor's compression efficiency and reducing energy consumption in the high-temperature operating area. Simultaneously, evaporator 24 removes heat from the first water flow line 5, cooling the hot water again and supplying it to the first condenser 12 for cooling, thus reducing energy consumption in the first heat pump mechanism 1.

[0055] The first compressor 11 and the second compressor 21 are connected to an external power source, which includes but is not limited to mains electricity.

[0056] The first condenser 12, the evaporator 24 and the heat exchange mechanism 3 are connected via the first water flow pipeline 5 to form a first water flow loop. The first water flow loop performs heat exchange with the first condenser 12, the evaporator 24 and the heat exchange mechanism 3 respectively.

[0057] The first water flow loop absorbs the heat dissipated by the first condenser 12 and the flue gas heat, and provides the absorbed heat to the second refrigerant loop for absorption at the evaporator 24, thereby reducing the energy consumption of the second refrigerant loop. Simultaneously, the first water flow loop lowers its temperature at the evaporator 24 and flows back to the first condenser 12 to absorb the heat released by the first refrigerant loop, thereby reducing the energy consumption of the first refrigerant loop. Through the first water flow loop, the combined power supply system reduces both the cooling energy consumption of the low-temperature working area and the heating energy consumption of the high-temperature working area. At the same time, the waste heat from the flue gas of the gas unit 4 is recycled and utilized, achieving energy matching and coupling within the system, thereby reducing user costs.

[0058] The second water flow pipeline is connected to the second condenser 22 and the gas mechanism 4 in sequence. The cold water in the second water flow pipeline is heated by the second condenser 22 and the gas mechanism 4 in sequence and then discharged.

[0059] Specifically, the water inlet of the second condenser 22 is connected to the water inlet pipe, and the water outlet of the second condenser 22 is connected to the water inlet of the gas mechanism 4. The water outlet of the gas mechanism 4 is connected to the water outlet pipe to discharge hot water. The second condenser 22 first heats the cold water in the second water flow pipe to medium-temperature hot water, and then uses the gas mechanism 4 to further heat the water to 95 degrees Celsius to meet the user's demand for high-temperature hot water.

[0060] The first compressor 11 and the second compressor 21 are screw compressors.

[0061] Screw compressors are highly reliable, easy to operate and maintain, and are small in size, light in weight, and take up little space, making them convenient for operation in combined power supply systems.

[0062] The gas-electricity complementary combined heating and cooling system further includes a skid frame for mounting the first heat pump mechanism 1, the second heat pump mechanism 2, the heat exchange mechanism 3, the first water flow pipeline 5, the second water flow pipeline, and the gas mechanism 4, so as to facilitate the transportation and installation of the combined heating and cooling system and enable it to be more efficiently deployed and used.

[0063] In summary, this technical solution proposes a gas-electricity complementary cooling and heating combined supply system. Through the first water flow loop, it reduces the cooling energy consumption of the first heat pump mechanism 1 and the heating energy consumption of the second heat pump mechanism 2, and recycles the waste heat of the flue gas of the gas mechanism 4, realizing the matching coupling of energy within the system and reducing the user's usage cost. At the same time, the medium-temperature hot water heated by the second heat pump mechanism 2 is further heated by the gas mechanism 4, and the medium-temperature hot water is raised to 95 degrees of high-temperature hot water to meet the user's demand for high-temperature hot water. This gas-electricity complementary cooling and heating combined supply system saves the cooling device of a separate refrigeration and air conditioning, saves the land area and usage cost of the cooling device, and matches the energy within the system to achieve deep energy utilization, save system energy consumption, and simultaneously improve the efficiency of the system's cooling and heating.

[0064] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A gas-electricity complementary cooling and heating system, characterized in that: include: a first heat pump mechanism, a second heat pump mechanism, a first water flow pipeline, and a second water flow pipeline; The first water flow pipeline is connected to the first heat pump mechanism and the second heat pump mechanism respectively, and the second heat pump mechanism is also connected to the second water flow pipeline; The first water flow pipeline is used to absorb heat from the first heat pump mechanism and heat the second heat pump mechanism, and the second water flow pipeline is used to absorb heat from the second heat pump mechanism.

2. The gas-electricity complementary cooling and heating system according to claim 1, characterized in that: The gas-electricity complementary cooling and heating system further includes: a gas mechanism; The gas mechanism and the second heat pump mechanism are connected via the second water flow pipeline, and the cold water in the second water flow pipeline is heated by the second heat pump mechanism and the gas mechanism in sequence and then discharged.

3. The gas-electricity complementary cooling and heating system according to claim 2, characterized in that: The gas-electricity complementary cooling and heating system further includes a heat exchange mechanism, and the first water flow pipeline is also connected to the heat exchange mechanism; The gas mechanism further includes a flue gas pipe, which is connected to the heat exchange mechanism; The first water flow pipeline absorbs heat in the flue gas pipe at the heat exchange mechanism.

4. The gas-electricity complementary cooling and heating system according to claim 3, characterized in that: The first heat pump mechanism includes: a first compressor, a first throttle valve, a first condenser and a first refrigerant pipeline; The first refrigerant pipeline is sequentially connected to the first compressor, the first condenser, the first throttle valve and the air cooler to form a first refrigerant circuit.

5. The gas-electricity complementary cooling and heating system according to claim 4, characterized in that: The second heat pump mechanism includes: a second refrigerant pipeline, and a second compressor, a second condenser, a second throttle valve and an evaporator connected in sequence through the second refrigerant pipeline, forming a second refrigerant circuit.

6. The gas-electricity complementary cooling and heating system according to claim 5, characterized in that: The first condenser, the evaporator and the heat exchange mechanism are connected through the first water flow pipeline to form a first water flow loop. The first water flow loop performs heat exchange with the first condenser, the evaporator and the heat exchange mechanism respectively.

7. The gas-electricity complementary cooling and heating system according to claim 6, characterized in that: The second water flow pipeline is connected to the second condenser and the gas mechanism in sequence, and the cold water in the second water flow pipeline is heated by the second condenser and the gas mechanism in sequence and then discharged.

8. The gas-electricity complementary cooling and heating system according to claim 5, characterized in that: The first compressor is a screw compressor.

9. The gas-electricity complementary cooling and heating system according to claim 5, characterized in that: The second compressor is a screw compressor.

10. The gas-electricity complementary cooling and heating system according to claim 2, characterized in that: The gas-electricity complementary cooling and heating system further includes a skid frame for mounting the first heat pump mechanism, the second heat pump mechanism, the heat exchange mechanism, the first water flow pipeline, the second water flow pipeline and the gas mechanism.

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