Refrigeration house condenser waste heat recovery energy-saving system and method

Abstract

The refrigeration house condenser waste heat recovery energy-saving system comprises a refrigeration module, the refrigeration module is connected with a first heat energy recovery module, and the first heat energy recovery module is connected with a user side; the refrigeration module comprises a compressor, a first condenser, a first expansion valve and a first evaporator, the compressor is communicated with the first condenser, the first condenser is communicated with the first expansion valve, the first expansion valve is communicated with the first evaporator, and the first evaporator is communicated with the compressor; the first heat energy recovery module comprises a first water pump and a first adjusting valve connected with the first water pump in parallel, and the first adjusting valve and the first water pump are connected with a water supply source and communicate with the first condenser. The first condenser is connected with a second regulating valve, the second regulating valve is respectively communicated with one end port of a third regulating valve and one end port of a fourth regulating valve, the third regulating valve is communicated with the first condenser, and the fourth regulating valve is connected with a user side. The system improves the utilization rate of primary energy in the operation process of the refrigeration house.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of condenser waste heat recovery, and particularly relates to a cold storage condenser waste heat recovery energy-saving system and method. BACKGROUND

[0002] At present, a cold storage is built by using a refrigeration device to form a refrigeration system to complete refrigeration. The refrigeration coefficient of a current large cold storage is only about 2.5, which consumes a large amount of electricity and discharges 1.4 kW / h of condensation heat to the environment. Part of the heat accounts for 30% to 40% of the total energy consumption. The condensation heat is directly discharged to the environment through an air-cooled condenser or an open cooling tower. This not only causes heat radiation to the surrounding environment, but also leads to waste of primary energy due to the non-reuse of the condensation heat, resulting in low utilization rate of primary energy. In addition, an office area is provided around the cold storage. The heat energy in the office area is converted and transported by other energy, which increases the energy consumption of the cold storage and increases the operation cost of the cold storage. SUMMARY

[0003] In order to solve the problem of energy waste and large environmental side effects caused by direct discharge of condenser waste heat in the existing cold storage, the application provides a cold storage condenser waste heat recovery energy-saving system and method.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: The application provides a cold storage condenser waste heat recovery energy-saving system, which comprises a refrigeration module, a first heat energy recovery module connected to the refrigeration module, and a user end connected to the first heat energy recovery module. The refrigeration module comprises a compressor, a first condenser, a first expansion valve, and a first evaporator installed in the cold storage. The exhaust port of the compressor is in communication with the inlet of the first condenser. The outlet of the first condenser is in communication with the inlet of the first expansion valve. The outlet of the first expansion valve is in communication with the inlet of the first evaporator. The outlet of the first evaporator is in communication with the suction port of the compressor. The first heat energy recovery module comprises a first water pump and a first regulating valve connected in parallel to the first water pump. The inlet of the first regulating valve and the inlet of the first water pump are both connected to a water supply source. The outlet of the first regulating valve and the outlet of the first water pump are both in communication with the liquid inlet of the first condenser. A second regulating valve is connected to the liquid outlet of the first condenser. The outlet of the second regulating valve is in communication with one end port of a third regulating valve and one end port of a fourth regulating valve, respectively. The other end port of the third regulating valve is in communication with the liquid inlet of the first condenser. The other end port of the fourth regulating valve is connected to the user end.

[0005] Preferably, a second heat energy recovery module is connected between the outlet of the second regulating valve and the inlet of the third regulating valve. The second heat energy recovery module comprises a generator, a first inlet of the generator is communicated with the outlet of the second regulating valve, a first outlet of the generator is connected with one end of the fifth regulating valve and the sixth regulating valve in parallel, the other end of the fifth regulating valve is communicated with the inlet of the third regulating valve, and the other end of the sixth regulating valve is connected with a user end. The steam outlet of the generator is communicated with the inlet of a second condenser, the outlet of the second condenser is communicated with the inlet of a second expansion valve, the outlet of the second expansion valve is communicated with the first inlet of a second evaporator, the first outlet of the second evaporator is communicated with the steam inlet of an absorber, the liquid outlet of the absorber is communicated with the first inlet of a solution heat exchanger, the first outlet of the solution heat exchanger is communicated with the second inlet of the generator, the second outlet of the generator is communicated with the inlet of a seventh regulating valve, the outlet of the seventh regulating valve is communicated with the inlet of a second water pump, and the outlet of the second water pump is communicated with the second inlet of the solution heat exchanger.

[0006] Preferably, the first expansion valve and the second expansion valve are electronic expansion valves, thermal expansion valves or capillary tubes.

[0007] Preferably, a constant temperature regulating module is connected on the second condenser and the absorber, and the constant temperature regulating module is connected with a user heating end.

[0008] Preferably, the constant temperature regulating module comprises a water mixer, a first inlet of the water mixer is respectively communicated with the outlet of the second condenser and the second outlet of the absorber, a first outlet of the water mixer is respectively communicated with the inlet of the second condenser and the second inlet of the absorber, a second outlet of the water mixer is communicated with the inlet of the user heating end, and a second inlet of the water mixer is communicated with the outlet of the user heating end.

[0009] Preferably, a third water pump is installed on the pipeline connected between the first outlet of the water mixer and the inlet of the second condenser, and an eighth regulating valve is connected in parallel between the inlet and the outlet of the third water pump. A fourth water pump is installed on the pipeline connected between the first outlet of the water mixer and the second inlet of the absorber, and a ninth regulating valve is connected in parallel between the inlet and the outlet of the fourth water pump.

[0010] Preferably, the second outlet of the second evaporator is communicated with the first inlet of the three-way converging valve and the inlet of the tenth regulating valve respectively, the second inlet of the second evaporator is communicated with the outlet of the twelfth regulating valve, the inlet of the twelfth regulating valve is communicated with the outlet of the fifth water pump, the first outlet of the three-way converging valve is communicated with the first inlet of the radiant plate, and the outlet of the radiant plate is communicated with the inlet of the buffer tank and the inlet of the second stop valve respectively; The outlet of the buffer tank is communicated with the inlet of the first stop valve, and the outlet of the first stop valve is communicated with the second inlet of the three-way converging valve. The outlet of the second stop valve and the outlet of the tenth regulating valve are communicated with the inlet of the fifth water pump respectively, and the fifth water pump is connected with the eleventh regulating valve in parallel between the inlet and the outlet.

[0011] Preferably, the first turbine flow meter is installed on the second outlet of the second evaporator, and the second turbine flow meter is installed on the inlet of the tenth regulating valve. An exhaust valve is installed on the pipeline connected between the inlet of the twelfth regulating valve and the outlet of the fifth water pump, and an expansion tank is installed on the pipeline connected between the outlet of the second stop valve and the outlet of the tenth regulating valve and the inlet of the fifth water pump.

[0012] Preferably, the outlet of the second regulating valve is communicated with the inlet of the thirteenth regulating valve, the outlet of the thirteenth regulating valve is communicated with the first inlet of the plate heat exchanger, the first outlet of the plate heat exchanger is communicated with the inlet of the sixth water pump, the second inlet of the plate heat exchanger is connected with a water supply device, the second outlet of the plate heat exchanger is communicated with the inlet of the fourteenth regulating valve, and the outlet of the fourteenth regulating valve is communicated with the inlet of the sixth water pump. The fifteenth regulating valve is connected in parallel between the outlet and the inlet of the sixth water pump, the outlet of the sixth water pump is communicated with the inlet of the sixteenth regulating valve, and the outlet of the sixteenth regulating valve is connected with a spray head located above the first evaporator.

[0013] The application provides a cold storage condenser waste heat recovery energy-saving method, which is realized based on the above-mentioned cold storage condenser waste heat recovery energy-saving system and comprises the following steps. The first evaporator in the refrigeration module is started to deliver steam into the compressor, the steam is compressed by the compressor to form high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters the first condenser to be condensed, and condensation heat is generated. The first water pump draws water from a water supply source, cooperates with the first regulating valve to stabilize the flow, and then delivers the water into the first condenser to absorb the condensation heat for heat exchange, part of the water after heat exchange is supplied to users through the second regulating valve and the fourth regulating valve, and the other part of the water after heat exchange is mixed with the water drawn from the water supply source by the first water pump and then input into the first condenser again for heat exchange.

[0014] Compared with the prior art, the present application has the following beneficial technical effects: The present application provides a cold storage condenser waste heat recovery energy-saving system, which connects a heat energy recovery module to the refrigeration module, inputs heat exchange medium into the condenser in the refrigeration module through the water pump in the heat energy recovery module, absorbs the condensation heat in the condenser through the heat exchange medium, and then transmits it to the user end for use. The system can absorb the condensation heat generated during the operation of the cold storage and supply it to the user end around the cold storage for use, thereby improving the utilization rate of primary energy, reducing the supply of external energy to the user end, and reducing the operating cost of the cold storage. At the same time, the emission of condensation heat can avoid causing thermal pollution to the environment around the cold storage.

[0015] Further, the second heat energy recovery module is connected between the outlet of the second regulating valve and the inlet of the third regulating valve in the system, and the generator in the second heat energy recovery module heats the lithium bromide dilute solution with the waste heat of the cold storage condenser. Based on the thermal properties of the lithium bromide aqueous solution, the water in the dilute solution evaporates to form water vapor after being heated, and then the directly discharged waste heat is converted into the latent heat of phase change of water vapor, realizing the energy level improvement and effective capture of the waste heat. At the same time, the lithium bromide dilute solution is converted into a concentrated solution due to dehydration, and the dilute solution is subjected to cascade heat exchange with the dilute solution flowing back from the absorber through the solution heat exchanger, which not only preheats the dilute solution to be entered into the generator and reduces the heating energy consumption, but also cools the concentrated solution and improves the quality of the absorption process, greatly improving the energy utilization efficiency and reducing the primary energy consumption.

[0016] Further, the constant temperature regulating module is connected to the second condenser and the absorber in the system, and the high-temperature water of the second condenser and the absorber is mixed with the return water of the user heating end through the water mixer in the constant temperature regulating module, realizing temperature balance, guaranteeing the constant water temperature of the user heating end, meeting the heating demand, and reducing heat loss and working medium loss.

[0017] Further, the system couples the low-temperature cold water and the high-temperature return water of the radiant panel through the three-way combined valve to accurately control the water supply temperature to a certain temperature, which not only meets the indoor cooling demand, but also avoids the air dew point temperature to eliminate the condensation risk of the radiant panel and avoid the condensation of traditional radiant cooling; at the same time, the buffer tank can store the water outlet of the radiant panel to adjust the water supply amount when the load fluctuates, avoid the frequent start and stop of the evaporator, and reduce the energy consumption; and the exhaust valve is arranged on the water outlet of the water pump to prevent air blockage from affecting the heat exchange efficiency. The system also has an expansion tank to balance the system pressure and guarantee the stable operation of the water pump and the valve.

[0018] Further, the spray defrosting module in the system builds a waste heat recovery circuit through the plate heat exchanger, the idle waste heat working medium at the outlet of the second adjusting valve is in series heat exchange with the tap water input by the water supply device, the originally lost waste heat is converted into defrosting water preheating energy, the additional heating energy consumption is greatly reduced, the preheated tap water can be directly led out from the second outlet of the plate heat exchanger for reuse, and a cascade energy utilization mode is formed; meanwhile, the sixteenth adjusting valve precisely controls the spray pressure, the spray head fully covers the evaporator heat exchange surface in the form of uniform liquid film, the contact area of the frost and the defrosting water is maximized, defrosting is ensured to be complete and residue-free, frost blocking heat exchange is avoided, and the defrosting time is shortened to reduce the influence on the refrigeration efficiency of the cold storage. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A system connection schematic diagram of an embodiment of the cold storage condenser waste heat recovery energy-saving system provided by the application; Figure 2 A system connection schematic diagram of another embodiment of the cold storage condenser waste heat recovery energy-saving system provided by the application; Figure 3 A system connection schematic diagram of another embodiment of the cold storage condenser waste heat recovery energy-saving system provided by the application; Figure 4 A system connection schematic diagram of another embodiment of the cold storage condenser waste heat recovery energy-saving system provided by the application; Figure 5 A system connection schematic diagram of another embodiment of the cold storage condenser waste heat recovery energy-saving system based on the self-circulation of the cold chain logistics park provided by the application; In the drawings: 1, compressor; 2, first condenser; 3, first expansion valve; 4, first evaporator; 5, first water pump; 6, first adjusting valve; 7, second adjusting valve; 8, third adjusting valve; 9, generator; 10, second condenser; 11, second expansion valve; 12, second evaporator; 13, absorber; 14, solution heat exchanger; 15, seventh adjusting valve; 16, second water pump; 17, fifth adjusting valve; 18, sixth adjusting valve; 19, water mixer; 20, user heat supply end; 21, third water pump; 22, eighth adjusting valve; 23, fourth water pump; 24, ninth adjusting valve; 25, first turbine flowmeter; 26, second turbine flowmeter; 27, three-way combined flow valve; 28, first stop valve; 29, radiant plate; 30, buffer tank; 31, tenth adjusting valve; 32, second stop valve; 33, expansion tank; 34, fifth water pump; 35, eleventh adjusting valve; 36, exhaust valve; 37, twelfth adjusting valve; 38, thirteenth adjusting valve; 39, plate heat exchanger; 40, fourteenth adjusting valve; 41, sixth water pump; 42, fifteenth adjusting valve; 43, sixteenth adjusting valve; 44, fourth adjusting valve. DETAILED DESCRIPTION

[0020] In the following, certain example embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are to be regarded as illustrative in nature rather than restrictive.

[0021] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0022] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be direct connection, or indirect connection through intermediate medium; can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. "Below", "under" and "under" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] The present application provides a cold storage condenser waste heat recovery energy-saving system, which comprises a refrigeration module, a first heat energy recovery module connected to the refrigeration module, and a user end connected to the first heat energy recovery module.

[0027] The present application provides an embodiment of a cold storage condenser waste heat recovery energy-saving system, as shown in the figure. Figure 1 The working medium of the refrigeration module is refrigerant, which can be R134a or R22. The refrigeration module comprises a compressor 1, a first condenser 2, a first expansion valve 3, and a first evaporator 4 installed in the cold storage. The exhaust port of the compressor 1 is in communication with the inlet of the first condenser 2, which is used to generate high-temperature and high-pressure steam into the condensing side. The outlet of the first condenser 2 is in communication with the inlet of the first expansion valve 3, which is used to throttle and depressurize the high-temperature liquid refrigerant. The outlet of the first expansion valve 3 is in communication with the inlet of the first evaporator 4 to generate low-temperature and low-pressure two-phase flow. The outlet of the first evaporator 4 is in communication with the suction port of the compressor 1 to form a closed cycle and realize continuous refrigeration. The working medium of the first heat energy recovery module is water. The first heat energy recovery module comprises a first water pump 5 and a first regulating valve 6 connected in parallel with the first water pump 5. The first regulating valve 6 is used for continuous adjustment of the water flow in the pipeline. The inlet of the first regulating valve 6 and the inlet of the first water pump 5 are both connected to a water supply source. The outlet of the first regulating valve 6 and the outlet of the first water pump 5 are both connected to the liquid inlet of the first condenser 2. The water from the water supply source enters the first condenser 2 through the first water pump 5 to absorb the condensation heat and become hot water. The liquid outlet of the first condenser 2 is connected to a second regulating valve 7. The hot water after heat exchange is first adjusted by the second regulating valve 7. The outlet of the second regulating valve 7 is in communication with one end port of a third regulating valve 8 and one end port of a fourth regulating valve 44, respectively. The other end port of the third regulating valve 8 is in communication with the liquid inlet of the first condenser 2. The other end port of the fourth regulating valve 44 is connected to the user end. One part of the hot water adjusted by the second regulating valve 7 is mixed with the cold water input by the first water pump 5 after being adjusted by the third regulating valve 8 and then re-input into the first condenser 2 to improve the heat exchange efficiency of the first condenser 2. The other part of the hot water adjusted by the second regulating valve 7 is sent to the user end for use after being adjusted by the fourth regulating valve 44, thereby realizing efficient collection and use of the condensation heat in the refrigeration process of the cold storage, improving the utilization rate of resources, and reducing the operating cost of the cold storage.

[0028] In the embodiment, the first expansion valve 3 is an electronic expansion valve, a thermal expansion valve or a capillary tube; the first regulating valve 6, the second regulating valve 7, the third regulating valve 8 and the fourth regulating valve 44 are all provided with scales, so that the adjustment is more accurate. The application provides another embodiment of the cold storage condenser waste heat recovery energy-saving system. Figure 2 As shown in the figure, a second heat energy recovery module is connected between the outlet of the second regulating valve 7 and the inlet of the third regulating valve 8, thereby providing flow distribution, and the working medium pair of the second heat energy recovery module is lithium bromide-water solution.

[0029] The second heat energy recovery module comprises a generator 9, a first inlet of the generator 9 is communicated with the outlet of the second regulating valve 7, one end ports of a fifth regulating valve 17 and a sixth regulating valve 18 are connected in parallel on a first outlet of the generator 9, the other end port of the fifth regulating valve 17 is communicated with the inlet of the third regulating valve 8, and the other end port of the sixth regulating valve 18 is connected with a user end. A steam outlet of the generator 9 is communicated with an inlet of a second condenser 10, an outlet of the second condenser 10 is communicated with an inlet of a second expansion valve 11, an outlet of the second expansion valve 11 is communicated with a first inlet of a second evaporator 12, a first outlet of the second evaporator 12 is communicated with a steam inlet of an absorber 13, a liquid outlet of the absorber 13 is communicated with a first inlet of a solution heat exchanger 14, a first outlet of the solution heat exchanger 14 is communicated with a second inlet of the generator 9, a second outlet of the generator 9 is communicated with an inlet of a seventh regulating valve 15, an outlet of the seventh regulating valve 15 is communicated with an inlet of a second water pump 16, and an outlet of the second water pump 16 is communicated with a second inlet of the solution heat exchanger 14; after the lithium bromide dilute solution in the generator 9 is heated, water in the solution evaporates to form water vapor and enters the second condenser 10 to be condensed and released heat, at the same time, the lithium bromide dilute solution in the generator 9 is converted into lithium bromide concentrated solution due to the reduction of water, and then is transported to the solution heat exchanger 14 through the seventh regulating valve 15 and the second water pump 16, is cooled, enters the absorber 13, and the lithium bromide concentrated solution in the absorber 13 absorbs water vapor from the second evaporator 12 and is diluted into lithium bromide dilute solution, and then is preheated by the solution heat exchanger 14 and returns to the generator 9, so that the closed cycle of the solution is realized.

[0030] In the embodiment, the first expansion valve 3, the second expansion valve 11 are electronic expansion valves, thermal expansion valves or capillary tubes; the first regulating valve 6, the second regulating valve 7, the third regulating valve 8, the seventh regulating valve 15, the fifth regulating valve 17 and the sixth regulating valve 18 are all provided with scales, so that the adjustment is more accurate.

[0031] The application provides another embodiment of the cold storage condenser waste heat recovery energy-saving system. Figure 3 and Figure 5As shown, the second condenser 10 and the absorber 13 are connected with a thermostatic regulating module, and the thermostatic regulating module is connected with a user heating end 20. The working medium of the thermostatic regulating module is water.

[0032] The thermostatic regulating module comprises a water mixer 19, the first inlet of the water mixer 19 is communicated with the outlet of the second condenser 10 and the second outlet of the absorber 13 respectively, the first outlet of the water mixer 19 is communicated with the inlet of the second condenser 10 and the second inlet of the absorber 13 respectively, the second outlet of the water mixer 19 is communicated with the inlet of the user heating end 20, the second inlet of the water mixer 19 is communicated with the outlet of the user heating end 20, and a third water pump 21 is installed on the pipeline connected between the first outlet of the water mixer 19 and the inlet of the second condenser 10, and an eighth regulating valve 22 is connected in parallel between the inlet and the outlet of the third water pump 21; a fourth water pump 23 is installed on the pipeline connected between the first outlet of the water mixer 19 and the second inlet of the absorber 13, and a ninth regulating valve 24 is connected in parallel between the inlet and the outlet of the fourth water pump 23. In the system circuit, the high-temperature water from the outlets of the second condenser 10 and the absorber 13 is mixed into the water mixer 19, and the return water of the user heating end 20 is also connected to the water mixer 19 for temperature regulation, and two routes of mixed water with different temperatures are output after the thermostatic regulation, the first route is pressurized by the third water pump 21 and the fourth water pump 23 and sent to the second condenser 10 and the absorber 13, and the second route enters the user heating end 20, so that closed circulation and grading are realized.

[0033] As shown in Figure 3 and Figure 5 the second outlet of the second evaporator 12 is communicated with the first inlet of a three-way converging valve 27 and the outlet of a tenth regulating valve 31 respectively, the second inlet of the second evaporator 12 is communicated with the outlet of a twelfth regulating valve 37, the inlet of the twelfth regulating valve 37 is communicated with the outlet of a fifth water pump 34, the first outlet of the three-way converging valve 27 is communicated with the first inlet of a radiant panel 29, the outlet of the radiant panel 29 is communicated with the inlet of a buffer tank 30 and the inlet of a second stop valve 32 respectively; the outlet of the buffer tank 30 is communicated with the inlet of a first stop valve 28, the outlet of the first stop valve 28 is communicated with the second inlet of the three-way converging valve 27; the outlet of the second stop valve 32 and the outlet of the tenth regulating valve 31 are communicated with the inlet of the fifth water pump 34 respectively; the inlet and the outlet of the fifth water pump 34 are connected in parallel with an eleventh regulating valve 35; a first turbine flowmeter 25 is installed on the second outlet of the second evaporator 12, and a second turbine flowmeter 26 is installed on the inlet of the tenth regulating valve 31; an exhaust valve 36 is installed on the pipeline connected between the inlet of the twelfth regulating valve 37 and the outlet of the fifth water pump 34, and an expansion water tank 33 is installed on the pipeline connected between the outlet of the second stop valve 32 and the outlet of the tenth regulating valve 31 and the inlet of the fifth water pump 34.

[0034] Exemplary, with the evaporator inlet water temperature of 12℃ and outlet water temperature of 7℃, the second evaporator 12 will reduce the total return water from 12℃ to 7℃, at this time, the second stop valve 32 is closed, the first stop valve 28 is opened, the tenth regulating valve 31 is used to regulate the pipeline flow, and the first turbine flow meter 25 and the second turbine flow meter 26 are used to visualize the double measurement values in real time as feedback, and the valve opening is continuously adjusted until the set flow is reached. The low-temperature cold water of 7℃ is divided into two paths, the first path is a bypass branch that directly communicates with the tenth regulating valve 31 inlet; the second path flows into the three-way converging valve 27 and mixes with the return water of the radiant panel 29 in the valve cavity to form 14℃, which is used as the supply water temperature of the radiant panel 29 for heat dissipation; after the 14℃ water enters the radiant panel 29, it absorbs indoor heat (to cool the room), and the water temperature rises, i.e. the inlet water of 14℃ becomes outlet water of 16℃, the temperature difference ΔT = 2K; at this time, the first stop valve 28 is closed, and the second stop valve 32 is opened, the outlet water (16℃) of the radiant panel 29 will be divided into two paths, the first path enters the buffer tank 30 for water storage, and the second path will flow into the suction inlet of the fifth water pump 34 with the cold water of 7℃ in the bypass branch, mix and reduce the total return water temperature to 12℃ which can be handled by the second evaporator 12, the fifth water pump 34 sends the 12℃ total return water to the second evaporator 12 through the eleventh regulating valve 35, the exhaust valve 36 and the twelfth regulating valve 37, and then reduces the water temperature to 7℃, and outputs to the three-way converging valve 27, the whole cycle is repeated to realize efficient and condensation risk-free radiant cooling.

[0035] The present application provides another embodiment of a cold storage condenser waste heat recovery energy-saving system, as shown in Figure 4 and Figure 5As shown, the outlet of the second regulating valve 7 is connected with a spray defrosting module, and the working medium of the spray defrosting module is water. The spray defrosting comprises a thirteenth regulating valve 38, the outlet of the second regulating valve 7 is communicated with the inlet of the thirteenth regulating valve 38, the outlet of the thirteenth regulating valve 38 is communicated with the first inlet of a plate heat exchanger 39, the first outlet of the plate heat exchanger 39 is communicated with the inlet of a sixth water pump 41, the second inlet of the plate heat exchanger 39 is connected with a water supply device, the second outlet of the plate heat exchanger 39 is communicated with the inlet of a fourteenth regulating valve 40, the outlet of the fourteenth regulating valve 40 is communicated with the inlet of the sixth water pump 41, and the outlet and the inlet of the sixth water pump 41 are connected in parallel with a fifteenth regulating valve 42; the outlet of the sixth water pump 41 is communicated with the inlet of a sixteenth regulating valve 43, and the outlet of the sixteenth regulating valve 43 is connected with a spray head located above the first evaporator 4; the inlet of the plate heat exchanger 39 is divided into two routes: one route is from the outlet of the thirteenth regulating valve 38, and the second route is from external tap water; after the heat exchange in sequence, the outlet of the plate heat exchanger 39 is divided into two sides: the first side is directly led out, and the second side is connected with the second regulating valve 7 and the third regulating valve 8 to adjust the flow rate, and then the tap water after the heat exchange in the plate heat exchanger 39 flows into the fourteenth regulating valve 40 to adjust the flow rate, and then is connected in parallel with the first route to flow into the inlet of the sixth water pump 41, so as to form a double-route cooperative water supply circuit; the outlet of the sixth water pump 41 is divided into two routes: the first route is communicated with the inlet of the sixteenth regulating valve 43, and the second route is communicated with the fifteenth regulating valve 42; the outlet of the sixteenth regulating valve 43 sprays to the heat exchange surface of the first evaporator 4 in the form of a spray liquid film, so as to realize the spray defrosting function.

[0036] The application provides a cold storage condenser waste heat recovery energy-saving method, and the method is realized based on the cold storage condenser waste heat recovery energy-saving system. The first evaporator 4 in the refrigeration module is started, steam is transported into the compressor 1, high-temperature and high-pressure steam formed after compression of the compressor 1 enters the first condenser 2 to be condensed, and condensation heat is generated. The first water pump 5 extracts water in a water supply source, and after stable flow is realized by cooperation of the first regulating valve 6, the water is transported into the first condenser 2 to absorb condensation heat for heat exchange; part of the water after heat exchange is supplied to a user after flow rate adjustment of the second regulating valve 7 and the fourth regulating valve 44, and the other part of the water after heat exchange is mixed with the water extracted from the water supply source by the first water pump 5 and then input into the first condenser 2 again for heat exchange after flow rate adjustment of the second regulating valve 7 and the third regulating valve 8.

[0037] The foregoing merely illustrates the principles of the application and application of its leading features. This application is not limited to the exact details shown above and described herein, and obvious modifications will occur to those skilled in the art upon reading the foregoing description. Therefore, the scope of the application is not to be determined by the specific examples shown above, but only by the claims below. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0038] Furthermore, it should be appreciated that although the present specification describes particular embodiments, each of which contain only a single independent technology, the specification makes no implication that the application is limited to such. Rather, the specification using such terms as "in one embodiment" or "in an embodiment" is to establish as many independent embodiments as can be explicitly or implicitly disclosed. The mere inclusion of such terms, however, does not limit those embodiments but rather, the broadest possible interpretation of the specification is intended. The specification is not intended to be limited to the embodiments described herein, but rather the claims should be accorded the full scope consistent with the claims for which the support is recognized in the art. No language in the specification should be construed as indicating any non-claimed element as essential. The foregoing merely illustrates the principles of the application and application of its leading features. This application is not limited to the exact details shown above and described herein, and obvious modifications will occur to those skilled in the art upon reading the foregoing description. Therefore, the scope of the application is not to be determined by the specific examples shown above, but only by the claims below. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0038] Furthermore, it should be appreciated that although the present specification describes particular embodiments, each of which contain only a single independent technology, the specification makes no implication that the application is limited to such. Rather, the specification using such terms as "in one embodiment" or "in an embodiment" is to establish as many independent embodiments as can be explicitly or implicitly disclosed. The mere inclusion of such terms, however, does not limit those embodiments but rather, the broadest possible interpretation of the specification is intended. The specification is not intended to be limited to the embodiments described herein, but rather the claims should be accorded the full scope consistent with the claims for which the support is recognized in the art. No language in the specification should be construed as indicating any non-claimed element as essential.

Claims

1. A cold storage condenser waste heat recovery energy saving system, characterized in that, The application relates to a refrigeration module, a first heat energy recovery module connected to the refrigeration module, and a user end connected to the first heat energy recovery module. The refrigeration module comprises a compressor (1), a first condenser (2), a first expansion valve (3), and a first evaporator (4) installed in a cold storage; the exhaust port of the compressor (1) is communicated with the inlet of the first condenser (2), the outlet of the first condenser (2) is communicated with the inlet of the first expansion valve (3), the outlet of the first expansion valve (3) is communicated with the inlet of the first evaporator (4), and the outlet of the first evaporator (4) is communicated with the suction port of the compressor (1). The first heat energy recovery module comprises a first water pump (5) and a first regulating valve (6) connected in parallel with the first water pump (5); the inlet of the first regulating valve (6) and the inlet of the first water pump (5) are connected with a water supply source; and the outlet of the first regulating valve (6) and the outlet of the first water pump (5) are communicated with the liquid inlet of the first condenser (2). The liquid outlet of the first condenser (2) is connected with a second regulating valve (7); the outlet of the second regulating valve (7) is communicated with one end port of a third regulating valve (8) and one end port of a fourth regulating valve (44) respectively; the other end port of the third regulating valve (8) is communicated with the liquid inlet of the first condenser (2); and the other end port of the fourth regulating valve (44) is connected with the user end.

2. The system according to claim 1, wherein, The outlet of the second regulating valve (7) and the inlet of the third regulating valve (8) are connected with a second heat energy recovery module. The second heat energy recovery module comprises a generator (9); the first inlet of the generator (9) is communicated with the outlet of the second regulating valve (7); one end port of a fifth regulating valve (17) and one end port of a sixth regulating valve (18) are connected in parallel at the first outlet of the generator (9); the other end port of the fifth regulating valve (17) is communicated with the inlet of the third regulating valve (8); and the other end port of the sixth regulating valve (18) is connected with the user end. The steam outlet of the generator (9) is communicated with the inlet of a second condenser (10); the outlet of the second condenser (10) is communicated with the inlet of a second expansion valve (11); the outlet of the second expansion valve (11) is communicated with the first inlet of a second evaporator (12); the first outlet of the second evaporator (12) is communicated with the steam inlet of an absorber (13); the liquid outlet of the absorber (13) is communicated with the first inlet of a solution heat exchanger (14); the first outlet of the solution heat exchanger (14) is communicated with the second inlet of the generator (9); the second outlet of the generator (9) is communicated with the inlet of a seventh regulating valve (15); the outlet of the seventh regulating valve (15) is communicated with the inlet of a second water pump (16); and the outlet of the second water pump (16) is communicated with the second inlet of the solution heat exchanger (14).

3. The energy-saving system for waste heat recovery of a cold storage condenser according to claim 2, characterized in that, The first expansion valve (3) and the second expansion valve (11) are electronic expansion valves, thermal expansion valves or capillary tubes.

4. The system according to claim 2, wherein, The second condenser (10) and the absorber (13) are connected with a constant temperature adjustment module, and the constant temperature adjustment module is connected with a user heating end (20).

5. The system according to claim 3, wherein, The constant temperature adjustment module comprises a water mixer (19), a first inlet of the water mixer (19) is communicated with an outlet of the second condenser (10) and a second outlet of the absorber (13) respectively, a first outlet of the water mixer (19) is communicated with an inlet of the second condenser (10) and a second inlet of the absorber (13) respectively, a second outlet of the water mixer (19) is communicated with an inlet of the user heating end (20), and a second inlet of the water mixer (19) is communicated with an outlet of the user heating end (20).

6. The system according to claim 5, wherein, A third water pump (21) is installed on a pipeline connected between the first outlet of the water mixer (19) and the inlet of the second condenser (10), and an eighth adjusting valve (22) is connected in parallel between the inlet and the outlet of the third water pump (21). A fourth water pump (23) is installed on a pipeline connected between the first outlet of the water mixer (19) and the second inlet of the absorber (13), and a ninth adjusting valve (24) is connected in parallel between the inlet and the outlet of the fourth water pump (23).

7. The system according to claim 2, wherein, A second outlet of the second evaporator (12) is communicated with a first inlet of a three-way converging valve (27) and an inlet of a tenth adjusting valve (31) respectively, a second inlet of the second evaporator (12) is communicated with an outlet of a twelfth adjusting valve (37), the inlet of the twelfth adjusting valve (37) is communicated with an outlet of a fifth water pump (34), a first outlet of the three-way converging valve (27) is communicated with a first inlet of a radiant plate (29), and an outlet of the radiant plate (29) is communicated with an inlet of a buffer tank (30) and an inlet of a second stop valve (32) respectively. An outlet of the buffer tank (30) is communicated with an inlet of a first stop valve (28), and an outlet of the first stop valve (28) is communicated with a second inlet of the three-way converging valve (27). An outlet of the second stop valve (32) and an outlet of the tenth adjusting valve (31) are communicated with the inlet of the fifth water pump (34) respectively, and an eleventh adjusting valve (35) is connected in parallel between the inlet and the outlet of the fifth water pump (34).

8. The system according to claim 7, wherein, A first turbine flowmeter (25) is installed on the second outlet of the second evaporator (12), and a second turbine flowmeter (26) is installed on the inlet of the tenth adjusting valve (31). An exhaust valve (36) is installed on a pipeline connected between the inlet of the twelfth adjusting valve (37) and the outlet of the fifth water pump (34), and an expansion water tank (33) is installed on a pipeline connected between the outlet of the second stop valve (32) and the outlet of the tenth adjusting valve (31) and the inlet of the fifth water pump (34).

9. The system according to claim 1, wherein, The outlet of the second regulating valve (7) is communicated with the inlet of a thirteenth regulating valve (38), the outlet of the thirteenth regulating valve (38) is communicated with the first inlet of a plate heat exchanger (39), the first outlet of the plate heat exchanger (39) is communicated with the inlet of a sixth water pump (41), the second inlet of the plate heat exchanger (39) is connected with a water supply device, the second outlet of the plate heat exchanger (39) is communicated with the inlet of a fourteenth regulating valve (40), the outlet of the fourteenth regulating valve (40) is communicated with the inlet of the sixth water pump (41); The outlet and the inlet of the sixth water pump (41) are connected in parallel with a fifteenth regulating valve (42), the outlet of the sixth water pump (41) is communicated with the inlet of a sixteenth regulating valve (43), and the outlet of the sixteenth regulating valve (43) is connected with a spray head located above the first evaporator (4).

10. A method for recovering waste heat from a cold storage condenser, based on the energy-saving system for recovering waste heat from a cold storage condenser according to any one of claims 1-9, characterized in that, The method comprises the following steps: The first evaporator (4) in the refrigeration module is started to send steam into the compressor (1), the steam is compressed by the compressor (1) to form high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters the first condenser (2) to be condensed, and condensation heat is generated; The first water pump (5) extracts water in a water supply source, cooperates with the first regulating valve (6) to stabilize the flow, and then sends the water into the first condenser (2) to absorb the condensation heat for heat exchange, the water after the heat exchange is partly supplied to users through the second regulating valve (7) and the fourth regulating valve (44) to adjust the flow, and the other part is mixed with the water extracted by the first water pump (5) from the water supply source, and then input into the first condenser (2) again to be heat exchanged.

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