Heat recovery system of water chilling unit
By setting up heat exchange and power conversion mechanisms in the chiller unit, the heat from the condenser tubes is absorbed by the low-boiling-point cooling medium and generated electricity. Combined with the circulation pump for secondary heat recovery, the problem of direct heat discharge from the condenser is solved, achieving efficient heat recovery and energy saving.
Patent Information
- Application Number
- CN202520443576.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-13
AI Technical Summary
During operation, existing chiller units release heat directly into the environment from the condenser, resulting in energy waste and thermal pollution, and failing to effectively recover and utilize the energy.
A heat recovery system for a chiller unit was designed. By setting up first and second heat exchange mechanisms, the system utilizes a low-boiling-point cooling medium to absorb heat from the condenser tubes, which then evaporates into a gaseous state to drive a steam turbine to generate electricity, thus achieving the initial heat energy conversion. Then, a circulating pump injects chilled water into the surface of the condenser tubes for secondary heat recovery. After liquefying the cooling medium, it re-enters the first heat exchange mechanism, thus achieving dual heat recovery.
It achieves efficient heat recovery of the chiller unit, converting it into electrical energy for the unit's operation, while improving energy utilization and reducing environmental thermal pollution.
Smart Images
Figure CN223826610U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat recovery technical field, concretely relates to a heat recovery system of water chiller unit. BACKGROUND
[0002] Water chiller unit is a kind of common refrigeration equipment, it passes through a series of refrigeration cycle process, and heat is transferred from low temperature environment to high temperature environment, to produce low temperature cold water, provides refrigeration demand for different places.
[0003] In the operation process of existing water chiller unit, condenser will release a large amount of heat, and the traditional processing mode is to discharge these heat directly to the environment by cooling tower and other equipment, which not only causes energy waste, but also can produce heat pollution to the surrounding environment, and therefore a heat recovery system of water chiller unit is proposed. UTILITY MODEL CONTENT
[0004] The utility model provides a heat recovery system of water chiller unit to solve the problems in the background art.
[0005] To solve the above technical problems, the technical scheme adopted by the utility model is:
[0006] A heat recovery system of water chiller unit, comprising
[0007] First heat exchange mechanism, the first heat exchange mechanism includes cooling medium shunt bin, the bottom of cooling medium shunt bin is fixedly connected with condenser pipe, and the bottom of condenser pipe is provided with cooling medium collection bin;
[0008] Electric energy conversion mechanism, the electric energy conversion mechanism includes mounting bracket, and the top of mounting bracket is fixedly connected with conversion bin;
[0009] Heat energy recovery mechanism, the heat energy recovery mechanism includes water storage tank and heat exchange assembly, and one side of water storage tank is provided with third communicating pipe;
[0010] Second heat exchange mechanism between heat energy recovery mechanism and electric energy recovery mechanism, the structure of second heat exchange mechanism is same with first heat exchange mechanism.
[0011] The further improvement of the technical scheme of the utility model is that the top of cooling medium collection bin and the bottom of cooling medium shunt bin are fixedly connected with heat exchange bin, and the surface of heat exchange bin is provided with liquid distributor.
[0012] The further improvement of the technical scheme of the utility model is that one side of the inner cavity of liquid distributor is provided with spray pipe, the surface of liquid distributor is provided with heat exchange medium return pipe, and the inside of heat exchange medium return pipe is provided with return pump.
[0013] A further improvement of this utility model is that: a generator is fixedly connected to one side of the conversion chamber, a steam turbine is fixedly connected to the surface of the generator shaft, and the steam turbine is located inside the conversion chamber.
[0014] A further improvement of this utility model is that: the inner cavity of the conversion chamber is connected to the upper end of the inner cavity of the heat exchange chamber through a first connecting pipe, and a second connecting pipe is provided at the end of the inner cavity of the conversion chamber away from the first connecting pipe.
[0015] A further improvement of this utility model is that a fourth connecting pipe is provided on the other side of the water storage tank, and a circulation pump is provided inside the fourth connecting pipe.
[0016] A further improvement of this utility model is that one end of the third connecting pipe is connected to the lower end of the left heat exchange chamber, and one end of the fourth connecting pipe is connected to the interior of the left liquid distributor.
[0017] A further improvement of this utility model is that: the interior of the cooling medium collection chamber on the left is connected to one end of the heat exchange medium return pipe, and the interior of the cooling medium distribution chamber on the left is connected to one end of the second connecting pipe.
[0018] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0019] This invention provides a heat recovery system for a chiller unit. Through the setting of an electrical energy conversion mechanism, a low-boiling-point cooling medium directly contacts the condenser tubes within the chiller unit, absorbing heat from the condenser tubes and causing the cooling medium to evaporate into a gaseous state. This gaseous cooling medium drives a turbine, which in turn drives a generator shaft to generate electricity, achieving the initial conversion and recovery of heat energy. Subsequently, the partially liquefied cooling medium enters a second heat exchange mechanism. While flowing through the condenser tubes in the second heat exchange mechanism, a circulating pump continuously injects cold water into the heat exchange chamber, causing the cold water to absorb heat and become hot water, achieving a secondary heat recovery. Simultaneously, the cooling medium is completely liquefied and can then re-enter the first heat recovery mechanism under the action of a return pump for further evaporation. This dual heat recovery setup not only increases heat recovery efficiency but also allows the converted electrical energy to be used for chiller unit operation, making it more energy-efficient and easier to use. Attached Figure Description
[0020] Fig. 1 This is a schematic diagram of the main structure of this utility model;
[0021] Fig. 2 This is a schematic diagram of the rear structure of the present invention;
[0022] Fig. 3This is a schematic diagram of the heat exchange mechanism of this utility model;
[0023] Fig. 4 This is an exploded view of the heat exchange mechanism of this utility model;
[0024] Fig. 5 This is an exploded view of the heat exchange mechanism of this utility model;
[0025] Fig. 6 This is a schematic diagram of the electrical energy conversion mechanism of this utility model.
[0026] In the diagram: 11. Cooling medium distribution chamber; 12. Condenser pipe; 13. Cooling medium collection chamber; 14. Heat exchange chamber; 15. Liquid distributor; 16. Spray pipe; 17. Heat exchange medium return pipe; 18. Return pump; 21. Mounting frame; 22. Conversion chamber; 23. Generator; 24. Steam turbine; 25. First connecting pipe; 26. Second connecting pipe; 31. Water tank; 32. Third connecting pipe; 33. Fourth connecting pipe; 34. Circulation pump. Detailed Implementation
[0027] The present invention will be further described in detail below with reference to embodiments:
[0028] Example 1
[0029] like Figs. 1-6 As shown, this utility model provides a heat recovery system for a chiller unit, including a first heat exchange mechanism, which includes a cooling medium distribution chamber 11, a condenser pipe 12 fixedly connected to the bottom of the cooling medium distribution chamber 11, and a cooling medium collection chamber 13 at the bottom of the condenser pipe 12; an electrical energy conversion mechanism, which includes a mounting frame 21, and a conversion chamber 22 fixedly connected to the top of the mounting frame 21; and a heat energy recovery mechanism, which includes a water storage tank 31 and a heat exchange assembly, a third connecting pipe 32 on one side of the water storage tank 31, and a second heat exchange mechanism between the heat energy recovery mechanism and the electrical energy recovery mechanism, the structure of which is the same as that of the first heat exchange mechanism.
[0030] In this embodiment, during use, the cooling medium distribution chamber 11 and the cooling medium collection chamber 13 are connected to other components inside the chiller unit. When the refrigerant water vapor in the chiller unit enters the condenser tube 12, the return pump 18 is started to inject a low-boiling-point cooling medium, such as pentafluoropropane, into the distributor 15 along the heat exchange medium return pipe 17. Subsequently, it is sprayed onto the surface of the condenser tube 12 along multiple spray pipes 16 to absorb the heat from the refrigerant water in the condenser tube 12. After absorbing a large amount of heat, it evaporates into high-pressure gas.
[0031] Example 2
[0032] likeFigs. 1-6 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a heat exchange chamber 14 is fixedly connected to the top of the cooling medium collection chamber 13 and the bottom of the cooling medium distribution chamber 11. A liquid distributor 15 is provided on the surface of the heat exchange chamber 14, a spray pipe 16 is provided on one side of the inner cavity of the liquid distributor 15, a heat exchange medium return pipe 17 is provided on the surface of the liquid distributor 15, a return pump 18 is provided inside the heat exchange medium return pipe 17, a generator 23 is fixedly connected to one side of the conversion chamber 22, a steam turbine 24 is fixedly connected to the surface of the generator 23 shaft, the steam turbine 24 is located inside the conversion chamber 22, the inner cavity of the conversion chamber 22 is connected to the upper end of the inner cavity of the heat exchange chamber 14 through a first connecting pipe 25, and a second connecting pipe 26 is provided at the end of the inner cavity of the conversion chamber 22 away from the first connecting pipe 25.
[0033] In this embodiment, high-pressure gas enters the conversion chamber 22 through the first connecting pipe 25, driving the turbine 24 to rotate, which in turn causes the generator 23 shaft to rotate, generating electricity and converting thermal energy into electrical energy for the operation of the chiller unit. Subsequently, the gaseous cooling medium enters the cooling medium distribution chamber in the second heat exchange mechanism, i.e., the left cooling medium distribution chamber, through the second connecting pipe 26.
[0034] Example 3
[0035] like Figs. 1-6 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a fourth connecting pipe 33 is provided on the other side of the water storage tank 31, a circulation pump 34 is provided inside the fourth connecting pipe 33, one end of the third connecting pipe 32 is connected to the lower end of the left heat exchange chamber 14, one end of the fourth connecting pipe 33 is connected to the inside of the left liquid distributor, the inside of the left cooling medium collection chamber 13 is connected to one end of the heat exchange medium return pipe 17, and the inside of the left cooling medium distribution chamber 11 is connected to one end of the second connecting pipe 26.
[0036] In this embodiment, after the gaseous cooling medium enters the left condenser 12, the circulation pump 34 is started, and the cold water in the water tank 31 is injected into the left distributor 15 along the fourth connecting pipe 33. The cold water is then sprayed onto the surface of the left condenser 12 along the left spray pipe 16, absorbing the heat in the gaseous cooling medium and condensing it into a liquid state. This liquid state can then be drawn back into the heat exchange medium return pipe 17. Subsequently, the hot water returns to the water tank 31 along the third connecting pipe 32, circulating and causing the cold water to absorb heat and gradually heat up, thus performing secondary heat recovery and making it easier to use.
[0037] The working principle of the heat recovery system of this chiller unit will be explained in detail below.
[0038] like Figs. 1-6As shown, during operation, the cooling medium distribution chamber 11 and the cooling medium collection chamber 13 are connected to other components inside the chiller unit. When the refrigerant water vapor in the chiller unit enters the condenser tube 12, the return pump 18 is started, injecting a low-boiling-point cooling medium, such as pentafluoropropane, into the distributor 15 along the heat exchange medium return pipe 17. Subsequently, it is sprayed onto the surface of the condenser tube 12 along multiple spray pipes 16, absorbing heat from the refrigerant water in the condenser tube 12. After absorbing a significant amount of heat, it evaporates into high-pressure gas, which enters the conversion chamber 22 along the first connecting pipe 25, driving the turbine 24 to rotate, which in turn causes the generator 23 shaft to rotate, generating electricity and converting thermal energy into electrical energy to supply the chiller. When the unit is in operation, the gaseous cooling medium enters the cooling medium distribution chamber in the second heat exchange mechanism, i.e., the left cooling medium distribution chamber, along the second connecting pipe 26. After entering the left condenser 12, the circulation pump 34 is started, and the cold water in the water storage tank 31 is injected into the left liquid distributor 15 along the fourth connecting pipe 33. The cold water is then sprayed onto the surface of the left condenser 12 along the left spray pipe 16, absorbing the heat in the gaseous cooling medium and condensing it into a liquid state, which can then be drawn back into the heat exchange medium return pipe 17. Subsequently, the hot water returns to the water storage tank 31 along the third connecting pipe 32, circulating and causing the cold water to absorb heat and gradually rise in temperature, thus performing secondary heat energy recovery and making it easier to use.
[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A heat recovery system for a chiller unit, characterized in that: include The first heat exchange mechanism includes a cooling medium distribution chamber (11), a condenser pipe (12) is fixedly connected to the bottom of the cooling medium distribution chamber (11), and a cooling medium collection chamber (13) is provided at the bottom of the condenser pipe (12). An energy conversion mechanism, the energy conversion mechanism including a mounting frame (21), the top of which is fixedly connected to a conversion chamber (22); The heat recovery mechanism includes a water storage tank (31) and a heat exchange assembly. A third connecting pipe (32) is provided on one side of the water storage tank (31). A second heat exchange mechanism is provided between the heat energy recovery mechanism and the electricity recovery mechanism. The structure of the second heat exchange mechanism is the same as that of the first heat exchange mechanism.
2. The heat recovery system for a chiller unit according to claim 1, characterized in that: A heat exchange chamber (14) is fixedly connected to the top of the cooling medium collection chamber (13) and the bottom of the cooling medium distribution chamber (11), and a liquid distributor (15) is provided on the surface of the heat exchange chamber (14).
3. The heat recovery system for a chiller unit according to claim 2, characterized in that: A spray pipe (16) is provided on one side of the inner cavity of the liquid distributor (15), a heat exchange medium return pipe (17) is provided on the surface of the liquid distributor (15), and a return pump (18) is provided inside the heat exchange medium return pipe (17).
4. The heat recovery system for a chiller unit according to claim 1, characterized in that: A generator (23) is fixedly connected to one side of the conversion chamber (22), and a steam turbine (24) is fixedly connected to the surface of the rotating shaft of the generator (23). The steam turbine (24) is located inside the conversion chamber (22).
5. The heat recovery system for a chiller unit according to claim 1, characterized in that: The inner cavity of the conversion chamber (22) is connected to the upper end of the inner cavity of the heat exchange chamber (14) through the first connecting pipe (25), and a second connecting pipe (26) is provided at the end of the inner cavity of the conversion chamber (22) away from the first connecting pipe (25).
6. The heat recovery system for a chiller unit according to claim 1, characterized in that: A fourth connecting pipe (33) is provided on the other side of the water storage tank (31), and a circulation pump (34) is provided inside the fourth connecting pipe (33).
7. A heat recovery system for a chiller unit according to claim 6, characterized in that: One end of the third connecting pipe (32) is connected to the lower end of the left heat exchange chamber (14), and one end of the fourth connecting pipe (33) is connected to the interior of the left liquid distributor.
8. The heat recovery system for a chiller unit according to claim 1, characterized in that: The interior of the cooling medium collection chamber (13) on the left is connected to one end of the heat exchange medium return pipe (17), and the interior of the cooling medium distribution chamber (11) on the left is connected to one end of the second connecting pipe (26).