A cold-heat combined supply system based on absorption technology

Abstract

This utility model discloses a combined cooling and heating system based on absorption technology, relating to the field of combined cooling and heating technology, including a high-temperature waste gas system, an absorption heating system, and an absorption refrigeration system. By installing an absorption heat exchanger with a large temperature difference, the heat exchange intensity is increased, the recovery temperature of the heating stack is reduced, and the energy transmission capacity of the pipeline network is improved, thereby enhancing the overall performance of the heating system. By installing an absorption refrigeration system, when there is no heating demand or the heating load is low in summer, the generated hot water is used to drive the absorption chiller for cooling, achieving centralized cooling, which can improve efficiency and economic benefits. Since the overall heating and cooling load fluctuates significantly at different times, adding heat storage and cold storage can effectively regulate the system load, alleviate load regulation pressure, and prevent overheating or overcooling, while also improving the system's start-up speed and regulation response capability.

Description

Technical Field

[0001] This utility model relates to the field of combined cooling and heating technology, and in particular to a combined cooling and heating system based on absorption technology. Background Technology

[0002] In recent years, with my country's rapid economic development and continuous urbanization, centralized heating and cooling systems have seen rapid growth. Many factories have been built around cities, generating large amounts of high-temperature exhaust gases that are released into the atmosphere. Meanwhile, heating in northern Chinese cities relies primarily on coal, contributing to severe smog pollution.

[0003] In recent years, my country has vigorously developed clean energy, making full use of waste heat generated in industry. While utilizing high-temperature waste heat in heating and cooling systems solves environmental problems, it also recovers energy such as heat and cold generated. However, most high-temperature waste gas recovery systems only provide heating, and only through simple heat exchangers. In the cooling system, absorption heat pumps are used to heat the circulating water, which is then used for cooling. This approach reduces the overall performance of the system and lacks a heat storage system for system regulation. Utility Model Content

[0004] The purpose of this invention is to provide a combined cooling and heating system based on absorption technology to solve the problems existing in the prior art, improve the overall performance of the system, and facilitate system regulation by setting up a heat storage system.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a combined cooling and heating system based on absorption technology, including a high-temperature waste gas system, an absorption heating system, and an absorption refrigeration system;

[0006] The high-temperature exhaust gas system includes a high-temperature exhaust gas source, a first heat exchanger, and a first circulating fan. The outlet of the high-temperature exhaust gas source is connected to the heat medium side inlet of the first heat exchanger via the first circulating fan, and the heat medium side outlet of the first heat exchanger is connected to the return port of the high-temperature exhaust gas source. The refrigerant side of the first heat exchanger is connected in parallel to the absorption heating system and the absorption refrigeration system. The absorption heating system includes an absorption large temperature difference heat exchanger unit, and the absorption refrigeration system includes an absorption chiller unit.

[0007] In one embodiment, the absorption heating system includes a fifth valve, a sixth valve, an absorption heat exchanger with a large temperature difference, and a first circulating water pump, which are sequentially and serially connected to the refrigerant-side outlet of the first heat exchanger. The first circulating water pump is connected to the refrigerant-side inlet of the first heat exchanger. A fourth valve is connected in parallel between the refrigerant-side outlet of the first heat exchanger and the fifth valve. The fourth valve is connected to a heat storage body. The end of the heat storage body is connected to the fifth valve and then connected in parallel to a ninth valve, an absorption refrigeration system, and the sixth valve. The ninth valve is connected to the first circulating water pump.

[0008] In one embodiment, the absorption heat exchanger unit includes a second heat exchanger and a first generator. The outlet of the first generator, which is connected to the outlet of the sixth valve, is connected to a first circulating water pump. The refrigerant-side outlet of the second heat exchanger is connected to a first evaporator, and the outlet of the first evaporator is connected to the refrigerant-side inlet of the second heat exchanger. External heating and return water pipes are respectively connected to the first absorber. The outlet of the first absorber is connected to the first condenser, and the outlet of the first condenser is connected to an external heating and water supply pipe.

[0009] In one embodiment, the heat medium side inlet of the second heat exchanger is connected to the heat medium side outlet of the first heat exchanger, and the heat medium side outlet of the second heat exchanger is connected to the return port of the high-temperature waste gas source; a second circulating water pump is provided between the refrigerant side outlet of the second heat exchanger and the first evaporator.

[0010] In one embodiment, the absorption refrigeration system includes a fifteenth valve; the end of the heat storage body is connected to the fifth valve and then connected in parallel to a ninth valve, a sixth valve, and a fifteenth valve; the absorption chiller unit includes a second evaporator, a second absorber, a second generator, and a second condenser; the outlet of the fifteenth valve is connected to the second generator, and the outlet of the second generator is connected to the outlet of the first generator and then connected to the inlet of the first circulating water pump; an external refrigeration return water pipe is connected to the inlet of the second evaporator, and the outlet of the second evaporator is connected to an eighteenth valve and a nineteenth valve respectively; the eighteenth valve is connected to a cold storage body, and the outlet of the cold storage body is connected to the outlet of the nineteenth valve and then connected to an external refrigeration water supply pipe.

[0011] In one embodiment, the second condenser, the second absorber, and the radiator form a closed-loop connection.

[0012] The present invention achieves the following beneficial technical effects compared to the prior art:

[0013] This utility model discloses a combined heating and cooling system based on absorption technology, comprising a high-temperature waste gas system, an absorption heating system, and an absorption refrigeration system. By installing an absorption heat exchanger with a large temperature difference, the heat exchange intensity is increased, the recovery temperature of the heating stack is reduced, and the energy transmission capacity of the pipeline network is improved, thereby enhancing the overall heating performance. By installing an absorption refrigeration system, during summer when there is no heating demand or the heating load is low, the generated hot water drives the absorption chiller for cooling, achieving centralized cooling, which improves efficiency and economic benefits. Since the overall heating and cooling load fluctuates significantly at different times, adding heat and cold storage media effectively regulates the system load, alleviates load regulation pressure, and prevents overheating and overcooling, while also improving the system's start-up speed and regulatory response capability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a combined cooling and heating system based on absorption technology;

[0016] The components are as follows: 1. High-temperature exhaust gas source; 2. First heat exchanger; 3. Second heat exchanger; 4. Fourth valve; 5. Fifth valve; 6. Sixth valve; 7. First circulating fan; 8. First circulating water pump; 9. Ninth valve; 10. Second circulating water pump; 11. First generator; 12. First condenser; 13. First absorber; 14. First evaporator; 15. Fifteenth valve; 16. Second generator; 17. Second evaporator; 18. Eighteenth valve; 19. Nineteenth valve; 20. Cold storage body; 21. Second absorber; 22. Second condenser; 23. Heat storage body; 24. Radiator. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The purpose of this invention is to provide a combined cooling and heating system based on absorption technology to solve the problems existing in the prior art, improve the overall performance of the system, and facilitate system regulation by setting up a heat storage system.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, this utility model provides a combined cooling and heating system based on absorption technology, including a high-temperature waste gas system, an absorption heating system, and an absorption refrigeration system. The high-temperature waste gas system includes a high-temperature waste gas source 1, a first heat exchanger 2, and a first circulating fan 7. The absorption heating system includes a second circulating water pump 10, a fourth valve 4, a fifth valve 5, a sixth valve 6, a ninth valve 9, a heat storage body 23, and an absorption large temperature difference heat exchanger unit. The absorption large temperature difference heat exchanger unit includes a first generator 11, a first condenser 12, a first evaporator 14, a first absorber 13, and a second heat exchanger 3. The absorption refrigeration system includes a fifteenth valve 15, an eighteenth valve 18, a nineteenth valve 19, a radiator 24, a cold storage body 20, and an absorption chiller unit. The absorption chiller unit includes a second generator 16, a second condenser 22, a second evaporator 17, and a second absorber 21.

[0021] In the system, the fourth valve 4 is connected to the inlet of the heat storage body 23, the fifth valve 5 is connected in parallel with the fourth valve 4, and the sixth valve 6 is connected to the inlet of the first generator 11 of the absorption heating system. The fifteenth valve 15 is connected to the inlet of the second generator 16 of the absorption refrigeration system. The eighteenth valve 18 is connected to the inlet of the cold storage body 20, and the nineteenth valve 19 is connected in parallel with the eighteenth valve 18.

[0022] The exhaust outlet at the top of the high-temperature exhaust gas source 1 is connected to the first circulating fan 7. The first circulating fan 7 is connected to the primary water inlet of the first heat exchanger 2. The primary water outlet of the first heat exchanger 2 is connected to the heat medium side inlet of the second heat exchanger 3. The heat medium side outlet of the second heat exchanger 3 is connected to the return gas port of the high-temperature exhaust gas source 1. The first heat exchanger 2 adopts counter-current heat exchange. The first circulating water pump 8 is connected to the refrigerant side inlet of the first heat exchanger 2. The refrigerant side outlet of the first heat exchanger 2 is connected in parallel with the fourth valve 4 and the fifth valve 5. The fourth valve 4 is connected to the inlet of the heat storage body 23. The outlet of the heat storage body 23 is merged with the outlet of the fifth valve 5 and divided into three branches, which are respectively connected to the sixth valve 6, the fifteenth valve 15 and the ninth valve 9. The outlet of the ninth valve 9 is connected to the inlet of the first circulating water pump 8. The outlet of valve 6 is connected to the inlet of the first generator 11. The outlet of the first generator 11 is connected to the first circulating water pump 8. The refrigerant-side outlet of the second heat exchanger 3 is connected to the second circulating water pump 10. The outlet of the second circulating water pump 10 is connected to the inlet of the first evaporator 14. The outlet of the first evaporator 14 is connected to the refrigerant-side return port of the second heat exchanger 3. The heating return water enters the inlet of the first absorber 13 in two separate paths. The outlet of the first absorber 13 is connected to the inlet of the first condenser 12. The outlet of the first condenser 12 is connected to the heating and water supply pipeline. The outlet of valve 15 is connected to the inlet of the second generator 16. The outlet of the second generator 16 is connected to the outlet of the first generator 11 and they converge to lead to the inlet of the first circulating water pump 8. The cooling return water is connected to the inlet of the second evaporator 17. The outlet of the second evaporator 17 is split into two paths, connecting to valves 18 and 19. Valve 18 is connected to the inlet of the cold storage body 20. The outlet of the cold storage body 20 is connected to the outlet of valve 19 and they converge to lead to the cooling water supply pipeline. The second condenser 22, the second absorber 21, and the radiator 24 form a closed loop to dissipate the heat generated by the second absorber 21 and the second condenser 22.

[0023] This utility model applies absorption technology to the field of combined cooling and heating, as detailed below:

[0024] High-temperature exhaust gas from high-temperature exhaust gas source 1 enters the first heat exchanger 2 via the first circulating fan 7, where it heats the secondary circulating water. During heating, the first heat exchanger 2 generates hot water to drive the first generator 11, and the waste heat generated by the second heat exchanger 3 goes to the first evaporator 14. During cooling, the heat generated by the first heat exchanger 2 drives the second generator 16 to generate hot water, thus producing cooling.

[0025] The present invention relates to a combined cooling and heating system based on absorption technology, wherein the heat source is high-temperature industrial waste gas, and the high-temperature waste gas is cooled down to low-temperature waste gas, which is then used as waste heat for secondary utilization.

[0026] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A combined cooling and heating system based on absorption technology, characterized in that: This includes high-temperature exhaust gas systems, absorption heating systems, and absorption refrigeration systems; The high-temperature exhaust gas system includes a high-temperature exhaust gas source, a first heat exchanger, and a first circulating fan. The outlet of the high-temperature exhaust gas source is connected to the heat medium side inlet of the first heat exchanger via the first circulating fan, and the heat medium side outlet of the first heat exchanger is connected to the return port of the high-temperature exhaust gas source. The refrigerant side of the first heat exchanger is connected in parallel to the absorption heating system and the absorption refrigeration system. The absorption heating system includes an absorption large temperature difference heat exchanger unit, and the absorption refrigeration system includes an absorption chiller unit.

2. The combined cooling and heating system based on absorption technology according to claim 1, characterized in that: The absorption heating system includes a fifth valve, a sixth valve, an absorption heat exchanger with a large temperature difference, and a first circulating water pump, which are sequentially connected in series with the refrigerant-side outlet of the first heat exchanger. The first circulating water pump is connected to the refrigerant-side inlet of the first heat exchanger. A fourth valve is connected in parallel between the refrigerant-side outlet of the first heat exchanger and the fifth valve. The fourth valve is connected to a heat storage body. The end of the heat storage body is connected to the fifth valve and then connected in parallel with a ninth valve, an absorption refrigeration system, and a sixth valve. The ninth valve is connected to the first circulating water pump.

3. The combined cooling and heating system based on absorption technology according to claim 2, characterized in that: The absorption heat exchanger unit includes a second heat exchanger and a first generator. The outlet of the first generator, which is connected to the outlet of the sixth valve, is connected to a first circulating water pump. The refrigerant-side outlet of the second heat exchanger is connected to a first evaporator, and the outlet of the first evaporator is connected to the refrigerant-side inlet of the second heat exchanger. External heating and return water pipes are respectively connected to the first absorber. The outlet of the first absorber is connected to the first condenser, and the outlet of the first condenser is connected to an external heating and water supply pipe.

4. The combined cooling and heating system based on absorption technology according to claim 3, characterized in that: The heat medium side inlet of the second heat exchanger is connected to the heat medium side outlet of the first heat exchanger, and the heat medium side outlet of the second heat exchanger is connected to the return port of the high-temperature waste gas source; a second circulating water pump is installed between the refrigerant side outlet of the second heat exchanger and the first evaporator.

5. The combined cooling and heating system based on absorption technology according to claim 4, characterized in that: The absorption refrigeration system includes a fifteenth valve. The end of the heat storage body is connected to the fifth valve and then connected in parallel to the ninth, sixth, and fifteenth valves. The absorption chiller unit includes a second evaporator, a second absorber, a second generator, and a second condenser. The outlet of the fifteenth valve is connected to the second generator. The outlet of the second generator is connected to the outlet of the first generator and then connected to the inlet of the first circulating water pump. An external refrigeration return water pipe is connected to the inlet of the second evaporator. The outlet of the second evaporator is connected to the eighteenth and nineteenth valves respectively. The eighteenth valve is connected to a cold storage body. The outlet of the cold storage body is connected to the outlet of the nineteenth valve and then connected to an external refrigeration water supply pipe.

6. The combined cooling and heating system based on absorption technology according to claim 5, characterized in that: The second condenser, the second absorber, and the radiator form a closed-loop connection.

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