Cold energy and heat energy recovery and utilization system

Abstract

The present invention provides a device for recovering and utilizing cold energy and heat energy, which includes a low-temperature storage tank, a cooler, an accumulator, a heater, and an energy utilization device. The energy-carrying agent in the cooler can exchange heat with a low-temperature medium to cool down and obtain cold energy, and the energy-carrying agent in the heater can exchange heat with a high-temperature medium to increase the temperature and obtain heat. The energy-carrying agent with cold energy or heat energy enters the accumulator and can exchange energy with the accumulator to store energy in the accumulator or absorb the energy stored in the accumulator. At the same time, the energy-carrying agent can evenly and continuously transmit cold energy or heat energy to the energy utilization device, so that the energy utilization device can utilize the cold energy or heat energy. The energy-carrying agent circulates throughout the entire operating system, which can realize the simultaneous recovery, storage and supply of cold energy and heat energy, so that cold energy and heat energy can be effectively recovered and utilized, and is conducive to improving the efficiency of energy recovery and utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery and utilization, and in particular to a cold energy and heat energy recovery and utilization system. Background Art

[0002] Before being supplied to end users, liquefied natural gas (-162°C) must be vaporized and heated to room temperature. During vaporization, liquefied natural gas releases a significant amount of cold energy, approximately 220 kW·h / t. Recycling this cold energy can achieve energy conservation and environmental protection, as well as expand the natural gas industry chain.

[0003] At present, most of the above-mentioned energy release processes are characterized by volatility and discontinuity. For example, the cold-using locations such as air separation, rubber crushing, dry ice manufacturing, and cold storage are often not in the same place as the liquefied natural gas vaporization locations. Power plants and solid waste treatment plants are also not in the same place as cement kilns and civilian heating locations. It is the spatial and temporal misalignment of cold supply points and cold-using points, and hot supply points and hot-using points that makes it impossible to efficiently recycle and utilize most of the energy. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problem in the prior art that during the supply process of low-temperature liquefied gas, most of the energy cannot be efficiently recovered and utilized due to the spatial and temporal misalignment of cold supply points with cold points and hot supply points with hot points.

[0005] In order to solve the above technical problems, the present invention provides a cold energy and heat energy recovery and utilization system, including a low-temperature storage tank, a cooler, an accumulator, a heater and an energy utilization device, wherein a low-temperature medium is contained in the low-temperature storage tank; the cooler includes a first channel for circulating the low-temperature medium and a second channel for circulating an energy-carrying agent, and the first channel and the second channel are independent of each other; the low-temperature storage tank is connected with the inlet of the first channel through a pipeline, and the low-temperature medium enters the first channel and can exchange energy with the energy-carrying agent circulating in the second channel; the accumulator contains an energy-carrying agent for storing energy, and the accumulator includes a high-temperature port and a low-temperature port; the low-temperature port of the accumulator is connected with the outlet of the second channel through a pipeline, so that the energy-carrying agent enters the accumulator from the second channel and exchanges energy with the energy-carrying agent; the heater includes a third channel for circulating the high-temperature medium and a third channel for circulating the energy-carrying agent Four channels, the third channel and the fourth channel are independent of each other; the inlet of the third channel is connected to the heat source through a pipeline, so that the high-temperature medium enters the third channel and can exchange energy with the energy-carrying agent flowing in the fourth channel; the outlet of the fourth channel is connected to the high-temperature port of the accumulator through a pipeline, so that the energy-carrying agent enters the accumulator from the fourth channel and exchanges energy with the energy-carrying agent; the outlet of the fourth channel is connected to the inlet of the second channel of the cooler through a pipeline, so that the energy-carrying agent enters the cooler after flowing through the fourth channel and exchanges energy with the low-temperature medium in the first channel; the inlet of the energy utilization equipment is connected to the high-temperature port and the low-temperature port of the accumulator through a pipeline; the outlet of the energy utilization equipment is connected to the inlet of the fourth channel through a pipeline, so that the energy-carrying agent that completes the energy exchange in the energy utilization equipment enters the heater or the cooler.

[0006] Optionally, the outlet of the energy utilization device is connected to the inlet of the fourth channel of the heater through a pipeline, and is connected to the inlet of the second channel of the cooler and the high-temperature port of the accumulator via the fourth channel.

[0007] Optionally, the cold energy and heat energy recovery and utilization system further includes an energy-carrying pump, which is arranged on a pipeline connecting the outlet of the energy utilization device and the inlet of the fourth channel.

[0008] Optionally, the cold energy and heat energy recovery and utilization system further includes a shunt pump, which is provided on a pipeline connecting the fourth channel and the inlet of the second channel.

[0009] Optionally, the cold energy and heat energy recovery and utilization system includes a connecting main pipe and a first connecting branch pipe and a second connecting branch pipe respectively connected to the outlet of the connecting main pipe; the inlet of the connecting main pipe is connected to the outlet of the fourth channel, the outlet of the first connecting branch pipe is connected to the inlet of the second channel, and the outlet of the second connecting branch pipe is connected to the high-temperature port of the accumulator; the first connecting branch pipe is provided with a fourth control valve and the diversion pump.

[0010] Optionally, the cold energy and heat energy recovery and utilization system also includes a transfer main pipe and a first transfer branch pipe and a second transfer branch pipe connected to the inlet of the transfer main pipe; the outlet of the transfer main pipe is connected to the inlet of the energy utilization equipment, the inlet of the first transfer branch pipe is connected to the second connection branch pipe, and the inlet of the second transfer branch pipe is connected to the low-temperature port of the accumulator; the first transfer branch pipe is provided with a seventh control valve, and the second transfer branch pipe is provided with a third control valve.

[0011] Optionally, the pipeline between the outlet of the second channel and the low-temperature port of the accumulator is a first pipeline, and a first temperature sensor is provided on the first pipeline for measuring the temperature value of the energy-carrying agent at the outlet of the second channel; the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the shunt pump, and the controller is electrically connected to the first temperature sensor to control the number of revolutions of the shunt pump according to the temperature value signal of the energy-carrying agent at the outlet of the second channel measured by the first temperature sensor; a second temperature sensor is provided on the connecting main pipe for measuring the temperature value of the energy-carrying agent at the inlet of the energy utilization equipment; the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the seventh control valve and the third control valve, and the controller is electrically connected to the second temperature sensor to control the opening of the seventh control valve and the third control valve according to the temperature value signal of the energy-carrying agent at the inlet of the energy utilization equipment measured by the second temperature sensor.

[0012] Optionally, a third temperature sensor is provided on the connecting main pipe for measuring the temperature of the energy-carrying agent at the outlet of the fourth channel of the heater; a sixth control valve is provided on the pipeline between the inlet of the third channel and the heat source, and the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the sixth control valve, and the controller is electrically connected to the third temperature sensor to control the opening of the sixth control valve according to the temperature value signal of the energy-carrying agent at the outlet of the fourth channel of the heater measured by the third temperature sensor.

[0013] Optionally, the cold energy and heat energy recovery and utilization system further includes a vaporizer, and the inlet of the vaporizer is connected to the outlet of the first channel through a pipeline.

[0014] Optionally, the cold energy and heat energy recovery and utilization system also includes a second pipeline and a second control valve, one end of the second pipeline is connected to the pipeline between the outlet of the low-temperature storage tank and the inlet of the first channel, and the other end of the second pipeline is connected to the pipeline between the outlet of the first channel and the inlet of the vaporizer; the second control valve is arranged on the second pipeline.

[0015] Optionally, the cold energy and heat energy recovery and utilization system also includes a mobile energy supply device, the outlet of the mobile energy supply device is connected to the low-temperature port of the accumulator through a pipeline, and the inlet of the mobile energy supply device is connected to the high-temperature port of the accumulator through a pipeline.

[0016] Optionally, the pipeline between the outlet of the mobile energy supply device and the low-temperature port of the accumulator includes a first transition pipe and a first external pipe connected to each other, the free end of the first transition pipe is connected to the low-temperature port of the accumulator, the free end of the first external pipe is connected to the outlet of the mobile energy supply device, and the first transition pipe and the first external pipe are connected via a quick-connect connector; the pipeline between the inlet of the mobile energy supply device and the high-temperature port of the accumulator includes a second transition pipe and a second external pipe connected to each other, the free end of the second transition pipe is connected to the high-temperature port of the accumulator, the free end of the second external pipe is connected to the inlet of the mobile energy supply device, and the second transition pipe and the second external pipe are connected via a quick-connect connector.

[0017] Optionally, the cold energy and heat energy recovery and utilization system further includes an expansion tank, which is arranged on the pipeline between the outlet of the energy utilization equipment and the inlet of the energy-carrying pump.

[0018] It can be seen from the above technical solution that the beneficial effects of the present invention are as follows: in the cold energy and heat energy recovery and utilization equipment of the present invention, the energy carrier can exchange heat with the low-temperature medium through the cooler to cool down and obtain cold energy, and the energy carrier can exchange heat with the high-temperature medium through the heater to increase the temperature and obtain heat. The energy carrier with cold energy or heat energy enters the accumulator and can exchange energy with the energy accumulator to store energy in the accumulator or absorb the energy stored in the energy accumulator. At the same time, the energy carrier can transmit cold energy or heat energy evenly and continuously to the energy utilization equipment, so that the energy utilization equipment can utilize the cold energy or heat energy. The energy carrier circulates in the entire operating system, which can realize the simultaneous recovery, storage and supply of cold energy and heat energy, so that cold energy and heat energy can be effectively recovered and utilized, and is conducive to improving the efficiency of energy recovery and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an embodiment of a cold energy and heat energy recovery and utilization system of the present invention.

[0020] The accompanying drawings are described as follows: 100, cold energy and heat energy recovery and utilization system; 10, low temperature storage tank; 20, cooler; 21, first channel; 22, second channel; 30, accumulator; 31, high temperature port; 32, low temperature port; 40, heater; 41, third channel; 42, fourth channel; 50, energy utilization equipment; 61, energy-carrying pump; 62, vaporizer; 63, mobile energy supply equipment; 631, mobile accumulator; 632, mobile energy-carrying pump; 64, quick connector; 65, expansion tank; 67, diverter pump; 71, first control valve; 72, second control valve; 73, second control valve; 74, second control valve; 75, second control valve; 76, second control valve; 77, second control valve; 78, second control valve; 79, first control valve; 80, first control valve; 81, first control valve; 82, second control valve; 83, second control valve; 84, second control valve; 85, first control valve; 86, second control valve; 87, second control valve; 88, second control valve; 89, first control valve; 90, first control valve; 91, first control valve; 92, second control valve; 93, second control valve; 94, second control valve; 95, first control valve; 96, second control valve; 97, second control valve; 98, first control valve; 99, first control valve; 100, first control valve; 101, first control valve; 102, second control valve; 103, first control valve; 104, first control valve; 105, first control valve; 106, first control valve; 107, first control valve; 108, first control valve 3. Third control valve; 74. Fourth control valve; 76. Sixth control valve; 77. Seventh control valve; 78. Eighth control valve; 79. Ninth control valve; 81. First pipeline; 82. Second pipeline; 83. Connecting main pipe; 84. First connecting branch pipe; 85. Second connecting branch pipe; 86. Transfer main pipe; 87. First transfer branch pipe; 88. Second transfer branch pipe; 891. First transition pipe; 892. First external pipe; 893. Second transition pipe; 894. Second external pipe; 91. First temperature sensor; 92. Second temperature sensor; 93. Third temperature sensor. DETAILED DESCRIPTION

[0021] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0022] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] See Figure 1 An embodiment of the present application provides a cold energy and heat energy recovery and utilization system 100, which can realize the recovery and utilization of cold energy and heat energy.

[0024] The cold energy and heat energy recovery and utilization system 100 of this embodiment includes a low-temperature storage tank 10 , a cooler 20 , an accumulator 30 , a heater 40 , and an energy utilization device 50 .

[0025] The cryogenic storage tank 10 contains a cryogenic medium. The cooler 20 includes a first channel 21 for circulating the cryogenic medium and a second channel 22 for circulating an energy carrier. The first channel 21 and the second channel 22 are independent of each other. The cryogenic storage tank 10 is connected to the inlet of the first channel 21 via a pipeline. The cryogenic medium enters the first channel 21 and can exchange energy with the energy carrier flowing in the second channel 22.

[0026] The accumulator 30 contains an energy-storing agent for storing energy. The accumulator 30 includes a high-temperature port 31 and a low-temperature port 32. The low-temperature port 32 of the accumulator 30 is connected to the outlet of the second channel 22 via a pipeline, allowing the energy-carrying agent to enter the accumulator 30 through the second channel 22 and exchange energy with the energy-carrying agent.

[0027] The heater 40 includes a third channel 41 for circulating a high-temperature medium and a fourth channel 42 for circulating an energy-carrying agent. The third channel 41 and the fourth channel 42 are independent of each other. The inlet of the third channel 41 is connected to the heat source through a pipeline, so that the high-temperature medium enters the third channel 41 and can exchange energy with the energy-carrying agent circulating in the fourth channel 42. The outlet of the fourth channel 42 is connected to the high-temperature port 31 of the accumulator 30 through a pipeline, so that the energy-carrying agent enters the accumulator 30 from the fourth channel 42 and exchanges energy with the energy-carrying agent. The outlet of the fourth channel 42 is connected to the inlet of the second channel 22 of the cooler 20 through a pipeline, so that the energy-carrying agent enters the cooler 20 from the fourth channel 42 and exchanges energy with the low-temperature medium in the first channel 21.

[0028] The inlet of the energy utilization device 50 is connected to the high-temperature port 31 and the low-temperature port 32 of the accumulator 30 through a pipeline, and the outlet of the energy utilization device 50 is connected to the inlet of the fourth channel 42 and the inlet of the second channel 22 through a pipeline, so that the energy carrier that completes the energy exchange in the energy utilization device 50 enters the heater 40 or the cooler 20.

[0029] Furthermore, the cryogenic medium in this embodiment is LNG. LNG releases a large amount of cold energy when vaporized, with each ton of LNG releasing approximately 220 kW·h of cold energy. In addition to LNG, the cryogenic medium can also be liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen, liquid helium, liquid ethane, liquid ethylene, etc.

[0030] The cryogenic medium is stored in a cryogenic storage tank 10. This can be a large LNG tank at an LNG receiving terminal, a small or medium-sized LNG tank located at a satellite vaporization station, or a liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen, or liquid helium tank used by industrial gas customers. There are no specific limitations on the cryogenic storage tank 10; any tank capable of accommodating the cryogenic medium will suffice.

[0031] In this embodiment, the cooler 20 is used for energy exchange between the cryogenic medium and the energy carrier. The liquid cryogenic medium vaporizes and heats up, so that the energy carrier absorbs the cold energy released by the cryogenic medium and cools down.

[0032] The cooler 20 of this embodiment includes a first channel 21 and a second channel 22, each independent of the other. The first channel 21 is used to circulate a cryogenic medium, while the second channel 22 is used to circulate an energy-carrying agent. The inlet of the first channel 21 is connected to the cryogenic storage tank 10 via a pipeline. The cryogenic medium enters the first channel 21 and exchanges energy with the energy-carrying agent flowing through the second channel 22, causing the energy-carrying agent to absorb cold energy and cool down.

[0033] A first control valve 71 is provided on the pipeline between the inlet of the first channel 21 and the cryogenic storage tank 10. The first control valve 71 is used to control the flow of the cryogenic medium in the cooler 20 by controlling the flow of the cryogenic medium between the cryogenic storage tank 10 and the inlet of the first channel 21.

[0034] The cold and heat energy recovery and utilization system 100 of this embodiment further includes a vaporizer 62, which is used to heat the cryogenic medium to meet the required supply temperature. The vaporizer 62 can be a large-scale LNG seawater heating vaporizer at an LNG receiving terminal, a small or medium-sized LNG air-temperature vaporizer or water-bath vaporizer located at various satellite vaporization stations, an air-temperature vaporizer or water-bath vaporizer for liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen, or liquid helium used by various industrial gas customers, a vehicle-mounted LNG vaporizer, or a ship-mounted LNG vaporizer.

[0035] The inlet of the vaporizer 62 is connected to the outlet of the first channel 21 in the cooler 20 through a pipeline. The liquid low-temperature medium enters the vaporizer 62 and is vaporized, and then enters the natural gas pipeline network or subsequent gas-using equipment through the pipeline.

[0036] The cold and heat energy recovery and utilization system 100 of this embodiment further includes a second pipeline 82 and a second control valve 72. One end of the second pipeline 82 communicates with the pipeline between the outlet of the cryogenic storage tank 10 and the inlet of the first passage 21, and the other end communicates with the pipeline between the outlet of the first passage 21 and the inlet of the vaporizer 62. The connection point between the second pipeline 82 and the pipeline between the outlet of the cryogenic storage tank 10 and the inlet of the first passage 21 is located upstream of the first control valve 71. The second control valve 72 is disposed on the second pipeline 82 to control the opening and closing of the second pipeline 82.

[0037] In this embodiment, the accumulator 30 contains an energy storage agent for storing energy. The energy storage agent can absorb the cold energy of the energy carrier agent to store cold, or absorb the heat of the energy carrier agent to store heat. The cold storage capacity of the cold storage agent is generally composed of three components: A. solid sensible heat from the energy carrier agent inlet temperature to the energy storage agent's phase transition temperature; B. latent heat from the energy storage agent's phase transition temperature; and C. liquid sensible heat from the energy storage agent's phase transition temperature to the inlet temperature of the energy utilization device 50.

[0038] Furthermore, the outlet of the energy utilization device 50 of this embodiment is connected to the inlet of the fourth channel 42 in the heater 40 through a pipeline, and is connected to the inlet of the second channel 22 of the cooler 20 and the high-temperature port 31 of the accumulator 30 via the fourth channel 42.

[0039] In this embodiment, the cold and heat energy recovery and utilization system 100 further includes an energy-carrying pump 61 and a shunt pump 67. The energy-carrying pump 61 is disposed in a pipeline connecting the outlet of the energy utilization device 50 and the inlet of the fourth channel 42. The shunt pump 67 is disposed in a pipeline connecting the fourth channel 42 and the inlet of the second channel 22.

[0040] In this embodiment, the low-temperature port 32 of the accumulator 30 is connected to the outlet of the second channel 22 via the first pipe 81, so that the energy-carrying agent that has absorbed cold energy in the cooler 20 enters the accumulator 30 for cold storage. The energy-carrying agent in the accumulator 30 exchanges energy with the energy-carrying agent, so that cold energy is stored in the accumulator 30.

[0041] In this embodiment, a first temperature sensor 91 is provided on the first pipeline 81 , and the first temperature sensor 91 is used to measure the temperature of the energy-carrying agent at the outlet of the second channel 22 .

[0042] Furthermore, the heater 40 of this embodiment includes a third channel 41 and a fourth channel 42 that are independent of each other. The third channel 41 is used for circulating the high-temperature medium, and the fourth channel 42 is used for circulating the energy carrier.

[0043] The inlet of the third channel 41 is connected to the outlet of the engine jacket water system or other heat source through a pipeline, so that the high-temperature medium enters the third channel 41. The outlet of the third channel 41 is connected to the inlet of the engine jacket water system or other heat source to achieve backflow.

[0044] In this embodiment, a sixth control valve 76 is provided on the pipeline between the inlet of the third channel 41 and the heat source. The sixth control valve 76 is used to control the on-off of the pipeline between the inlet of the third channel 41 and the heat source.

[0045] The high-temperature medium enters the third channel 41 and exchanges energy with the energy-carrying agent flowing in the fourth channel 42 , causing the energy-carrying agent to absorb heat energy and increase in temperature.

[0046] In this embodiment, the outlet of the energy utilization device 50 is connected to the inlet of the fourth channel 42 of the heater 40 via a pipeline, and is further connected to the inlet of the second channel 22 of the cooler 20 and the high-temperature port 31 of the accumulator 30 via the fourth channel 42. An energy-carrying pump 61 is provided in the pipeline between the outlet of the energy utilization device 50 and the inlet of the fourth channel 42 of the heater 40.

[0047] The energy utilization equipment 50 can be an air separation device, a low-temperature rubber crushing device, a cold storage, a seafood quick-freezing device, an ice-making device, a building air-conditioning device, a refrigerated truck, a refrigerated ship, etc. It can also be a mobile cold storage vehicle or a mobile heat storage vehicle for mobile cold charging of refrigerated trucks or fixed cold spots.

[0048] The cold and heat energy recovery and utilization system 100 of this embodiment further includes a connecting main pipe 83 and a first connecting branch pipe 84 and a second connecting branch pipe 85, respectively connected to the outlet of the connecting main pipe 83. The inlet of the connecting main pipe 83 is connected to the outlet of the fourth channel 42. The outlet of the first connecting branch pipe 84 is connected to the inlet of the second channel 22, and the outlet of the second connecting branch pipe 85 is connected to the high-temperature port 31 of the accumulator 30.

[0049] The first connecting branch pipe 84 is provided with a fourth control valve 74 for controlling the opening and closing of the first connecting branch pipe 84. The diversion pump 67 is provided on the first connecting branch pipe 84 for controlling the flow of the energy carrier in the first connecting branch pipe 84.

[0050] After exchanging energy with the high-temperature medium, the energy-carrying agent exits the heater 40, passes through the connecting main pipe 83 and the second connecting branch pipe 85, and then enters the accumulator 30 through the high-temperature port 31 of the accumulator 30, where it accumulates heat. The energy-carrying agent in the accumulator 30 absorbs the thermal energy of the energy-carrying agent, thereby storing heat. In this embodiment, a third temperature sensor 93 is provided on the connecting main pipe 83. This third temperature sensor 93 is used to measure the temperature of the energy-carrying agent at the outlet of the fourth channel 42 of the heater 40.

[0051] The cold and heat energy recovery and utilization system 100 of this embodiment further includes a transfer main pipe 86, a first transfer branch pipe 87, and a second transfer branch pipe 88 connected to the inlet of the transfer main pipe 86. The outlet of the transfer main pipe 86 is connected to the inlet of the energy utilization device 50. The inlet of the first transfer branch pipe 87 is connected to the second connecting branch pipe 85, and the inlet of the second transfer branch pipe 88 is connected to the low-temperature port 32 of the accumulator 30.

[0052] The first transfer branch pipe 87 is provided with a seventh control valve 77 for controlling the on / off of the first transfer branch pipe 87. The second transfer branch pipe 88 is provided with a third control valve 73 for controlling the on / off of the second transfer branch pipe 88.

[0053] In this embodiment, a second temperature sensor 92 is connected to the main pipe 86 , and the second temperature sensor 92 is used to measure the temperature of the energy-carrying agent at the inlet of the energy utilization device 50 .

[0054] Furthermore, the cold and heat energy recovery and utilization system 100 of this embodiment further includes a mobile energy supply device 63, which can be a mobile energy storage vehicle, including a mobile energy accumulator 631 and a mobile energy-carrying pump 632. The provision of the mobile energy-carrying pump 632 enables the energy storage agent to flow between the energy accumulator 30 and the mobile energy accumulator 631, thereby achieving energy transfer.

[0055] The mobile accumulator 631 contains an accumulator for storing energy. The outlet of the mobile accumulator 631 is connected to the low-temperature port 32 of the accumulator 30 via a pipeline. The inlet of the mobile accumulator 631 is connected to the second connecting branch pipe 85 via a pipeline through the mobile energy-carrying pump 632, thereby connecting to the high-temperature port 31 of the accumulator 30.

[0056] The pipeline between the outlet of the mobile accumulator 631 and the low-temperature port 32 of the accumulator 30 includes a first transition pipe 891 and a first external pipe 892 connected to each other. The free end of the first transition pipe 891 is connected to the low-temperature port 32 of the accumulator 30, and the free end of the first external pipe 892 is connected to the outlet of the mobile accumulator 631 in the mobile energy supply device 63. The first transition pipe 891 and the first external pipe 892 are connected through a quick-release connector 64.

[0057] The pipeline between the inlet of the mobile accumulator 631 and the high-temperature port 31 of the accumulator 30 includes a second transition pipe 893 and a second external pipe 894 connected to each other. The free end of the second transition pipe 893 is connected to the second connecting branch pipe 85 to achieve communication with the high-temperature port 31 of the accumulator 30. The free end of the second external pipe 894 is connected to the inlet of the mobile accumulator 631 via the energy carrying pump 61, and the second transition pipe 893 and the second external pipe 894 are connected through a quick-release connector 64.

[0058] In this embodiment, the second external pipe 894 is provided with an eighth control valve 78 for controlling the on-off of the second external pipe 894. The first external pipe 892 is provided with a ninth control valve 79 for controlling the on-off of the first external pipe 892.

[0059] In addition, the cold and heat energy recovery and utilization system 100 of this embodiment further includes an expansion tank 65, which is disposed in the pipeline between the outlet of the energy utilization device 50 and the inlet of the energy-carrying pump 61. The expansion tank 65 can store the amount of expansion of the energy-carrying agent after heating, thereby preventing damage to the pipeline caused by expansion and ensuring the overall structural stability of the cold and heat energy recovery and utilization system 100.

[0060] The cold and heat energy recovery and utilization system 100 of this embodiment has the following operating conditions during specific use, as follows:

[0061] When the evaporation cooling capacity of the cryogenic medium exceeds the cooling capacity required by the energy utilization device 50, the sixth control valve 76 closes, and the energy carrier flows out of the outlet of the energy carrier pump 61 under the action of the energy carrier pump 61, passing through the fourth channel 42 and the connecting main pipe 83 before being split. The majority of the energy carrier enters the first connecting branch pipe 84, then flows through the fourth control valve 74 and the diversion pump 67 into the second channel 22 of the cooler 20. A small portion of the energy carrier flows out of the connecting main pipe 83 and enters the second connecting branch pipe 85. The energy carrier entering the second channel 22 exchanges energy with the cryogenic medium in the first channel 21, absorbing the cooling capacity of the cryogenic medium. After absorbing the cold energy of the cryogenic medium, the energy-carrying agent flows out of the second channel 22 and is then split through the first pipeline 81. A portion of the energy-carrying agent flows directly into the second transfer branch pipe 88, while the remaining portion of the energy-carrying agent with excess cold energy flows into the accumulator 30 through the low-temperature port 32 of the accumulator 30. The energy-carrying agent exchanges energy with the energy-carrying agent in the accumulator 30. After the energy-carrying agent heats up and flows out of the accumulator 30, it merges with the energy-carrying agent flowing out of the second connecting branch pipe 85 and enters the first transfer branch pipe 87. The energy-carrying agent flowing out of the first transfer branch pipe 87 and the second transfer branch pipe 88 merge through the transfer main pipe 86 and enter the energy utilization device 50, achieving both cold supply and cold storage. The controller of the cold and heat energy recovery and utilization system 100 is electrically connected to the shunt pump 67 and the first temperature sensor 91. The controller controls the speed of the shunt pump based on the temperature of the energy-carrying agent at the outlet of the second channel 22 measured by the first temperature sensor 91 to prevent the energy-carrying agent from freezing in the cooler 20.

[0062] When the cooling capacity of the cryogenic medium is less than the cooling capacity required by the energy utilization device 50, the sixth control valve 76 is closed, and the energy carrier flows out of the outlet of the energy carrier pump 61 under the action of the energy carrier pump 61, enters the connecting main pipe 83 through the fourth channel 42, and the energy carrier flowing out of the connecting main pipe 83 is divided into two paths: one path enters the second channel 22 of the cooler 20 through the first connecting branch pipe 84 to exchange energy with the cryogenic medium, and then enters the first pipe 81; the other path enters the second connecting branch pipe 85 and is divided into two paths again, wherein One path enters the first transfer branch pipe 87, and the other path enters the accumulator 30 through the high-temperature port 31. After absorbing the cold energy of the energy accumulator, it flows out from the low-temperature port 32 and merges with the energy-carrying agent flowing out of the first pipeline 81 to enter the second transfer branch pipe 88. The energy-carrying agent flowing out of the second transfer branch pipe 88 merges with the energy-carrying agent flowing out of the first transfer branch pipe 87. The energy-carrying agent of the two merged paths enters the transfer main pipe 86 and then enters the energy utilization equipment 50 to release cold energy and heat up. The heated energy-carrying agent circulates under the action of the energy-carrying pump 61. The controller of the cold energy and heat energy recovery and utilization system 100 is electrically connected to the seventh control valve 77, the third control valve 73 and the second temperature sensor 92. The controller controls the opening of the seventh control valve 77 and the third control valve 73 according to the temperature of the energy carrier at the entrance of the energy utilization device 50 measured by the second temperature sensor 92, thereby adjusting the flow distribution of the energy carrier entering the high-temperature port 31 of the accumulator 30 and the first transfer branch 87, as well as the flow distribution of the energy carrier entering the low-temperature port 32 of the accumulator 30 and the second transfer branch 88.

[0063] When the supply of low-temperature medium stops, the sixth control valve 76 is closed, and the fourth control valve 74 is closed. The energy-carrying agent flows out from the outlet of the energy-carrying pump 61 under the action of the energy-carrying pump 61, passes through the fourth channel 42 and the connecting main pipe 83, and enters the second connecting branch pipe 85. The energy-carrying agent flowing out of the second connecting branch pipe 85 is divided into two paths: one path of the energy-carrying agent enters the accumulator 30 through the high-temperature port 31, absorbs the cold energy of the energy-carrying agent, and then enters the second transfer branch pipe 88; the other path of the energy-carrying agent passes through the first transfer branch pipe 87, and merges with the energy-carrying agent flowing out of the second transfer branch pipe 88, and enters the energy utilization device 50 through the transfer main pipe 86 to achieve cooling. The heated energy-carrying agent circulates under the action of the energy-carrying pump 61. The controller of the cold energy and heat energy recovery and utilization system 100 is electrically connected to the seventh control valve 77, the third control valve 73 and the second temperature sensor 92. The controller controls the opening of the seventh control valve 77 and the third control valve 73 according to the temperature of the energy carrier at the inlet of the energy utilization device 50 measured by the second temperature sensor 92, thereby adjusting the flow distribution of the energy carrier entering the high-temperature port 31 of the accumulator 30 and entering the first transfer branch pipe 87.

[0064] When energy utilization equipment 50 uses an evaporator with a fan to transfer cooling energy through heat exchange with air, and evaporator frosting seriously affects heat exchange efficiency, third control valve 73 and fourth control valve 74 are closed, and sixth control valve 76 is opened. Under the action of energy pump 61, the energy carrier flows from the outlet of energy pump 61 into fourth channel 42 of heater 40. The energy carrier in fourth channel 42 exchanges energy with the high-temperature medium, absorbing heat. The heat-absorbed and heated energy carrier passes through connecting main pipe 83, second connecting branch pipe 85, first transfer branch pipe 87, and transfer main pipe 86, and enters energy utilization equipment 50, defrosting the evaporator. The cooled energy carrier circulates under the action of energy pump 61. A controller of cold and heat energy recovery and utilization system 100 is electrically connected to sixth control valve 76 and third temperature sensor 93. The controller controls the opening of sixth control valve 76 based on the temperature of the energy carrier at the outlet of fourth channel 42, as measured by third temperature sensor 93, thereby controlling the temperature of the energy carrier to a desired level.

[0065] When the heat energy provided by the heat source exceeds the heat required by the energy utilization device 50, the fourth control valve 74 is closed and the sixth control valve 76 is opened. Under the action of the energy pump 61, the energy carrier flows out of the outlet of the energy pump 61 and into the fourth channel 42 of the heater 40. The energy carrier in the fourth channel 42 exchanges energy with the high-temperature medium, absorbing heat. The heated energy carrier passes through the connecting main pipe 83 and enters the second connecting branch pipe 85. After flowing out of the second connecting branch pipe 85, the energy carrier is divided into two paths: one path enters the first transfer branch pipe 87, and the other path enters the accumulator 30 through the high-temperature port 31, transferring heat energy to the energy accumulator. After the energy exchange, the energy carrier flows out of the low-temperature port 32 and into the second transfer branch pipe 88. The energy carrier in the first transfer branch pipe 87 and the second transfer branch pipe 88 merge, flow into the transfer main pipe 86, and then enter the energy utilization device 50, providing heat energy. The cooled energy carrier is then circulated under the action of the energy pump 61. The controller of the cold and heat energy recovery and utilization system 100 is electrically connected to the sixth control valve 76 and the third temperature sensor 93. The controller controls the opening of the sixth control valve 76 based on the temperature of the energy carrier at the outlet of the fourth channel 42, as measured by the third temperature sensor 93, thereby controlling the energy carrier to reach a rising temperature. The controller of the cold and heat energy recovery and utilization system 100 is electrically connected to the seventh control valve 77, the third control valve 73, and the second temperature sensor 92. The controller controls the openings of the seventh and third control valves 77 and 73 based on the temperature of the energy carrier at the inlet of the energy utilization device 50, as measured by the second temperature sensor 92, thereby regulating the flow distribution of the energy carrier into the high-temperature port 31 of the accumulator 30 and into the first transfer branch pipe 87.

[0066] When the heat energy provided by the heat source is less than the heat required by the energy utilization device 50 or the heat source is shut down, the first control valve 71 and the third control valve 73 are closed. Under the action of the energy pump 61, the energy carrier flows out of the outlet of the energy pump 61 and into the fourth channel 42 of the heater 40. From the fourth channel 42, the energy carrier flows through the connecting main pipe 83 and then splits into two paths: one path enters the second connecting branch pipe 85, and the other path enters the first connecting branch pipe 84 and enters the accumulator 30 through the second channel 22 of the cooler 20 through the low-temperature port 32. In the accumulator 30, the energy carrier absorbs the stored heat energy and flows out of the high-temperature port 31, where it merges with the energy carrier flowing out of the second connecting branch pipe 85. The merged energy carrier flows through the first transfer branch pipe 87 and the transfer main pipe 86 into the energy utilization device 50, thus providing heat energy. The cooled energy carrier circulates under the action of the energy pump 61.

[0067] When the supply of low-temperature or high-temperature medium is interrupted, an external mobile energy supply device 63, which is a mobile energy storage vehicle, can be connected. Specifically, the first transition pipe 891 and the first external pipe 892 are connected via the quick-release connector 64, and the second transition pipe 893 and the second external pipe 894 are connected. After closing the fourth control valve 74, the energy carrier enters the low-temperature port 32 of the accumulator 30 under the action of the mobile energy pump 632 and is then divided into two paths: one path of energy carrier enters the accumulator 30, transfers energy to the energy storage agent, and then flows out of the high-temperature port 31; the other path of energy carrier enters the second transfer branch pipe 88, and then enters the energy utilization device 50 through the transfer main pipe 86 to provide cooling or heating. After the energy-carrying agent flows out of the energy utilization device 50, it enters the second connecting branch pipe 85 through the fourth channel 42 and the connecting main pipe 83 under the action of the energy-carrying pump 61. The energy-carrying agent flowing out of the second connecting branch pipe 85 is divided into two paths: one path of the energy-carrying agent enters the first transfer branch pipe 87, and merges with the energy-carrying agent flowing out of the second transfer branch pipe 88 to enter the energy utilization device 50 through the transfer main pipe 86; the other path of the energy-carrying agent merges with the energy-carrying agent flowing out of the high-temperature port 31 and enters the second transition pipe 893 and the second external pipe 894, and enters the mobile energy accumulator 631 under the action of the mobile energy-carrying pump 632 to exchange energy with the energy-carrying agent in the mobile energy accumulator 631, absorb cold or heat, and then enter the first external pipe 892 for circulation to complete mobile cold or hot charging. The controller of the cold and heat energy recovery and utilization system 100 is electrically connected to the seventh control valve 77, the third control valve 73, and the second temperature sensor 92. The controller controls the openings of the seventh and third control valves 77 and 73 based on the temperature of the energy carrier at the inlet of the energy utilization device 50, as measured by the second temperature sensor 92. This controller thereby adjusts the flow distribution of the energy carrier into the second transition pipe 893 and the first transfer branch pipe 87, and also adjusts the flow distribution of the energy carrier into the accumulator 30 and the second transfer branch pipe 88. The cycle ends when the accumulator 30 is fully charged.

[0068] For the cold energy and heat energy recovery and utilization equipment of this embodiment, the energy carrier can exchange heat with the low-temperature medium through the cooler to cool down and obtain cold energy, and the energy carrier can exchange heat with the high-temperature medium through the heater to increase the temperature and obtain heat. The energy carrier with cold energy or heat energy enters the accumulator and can exchange energy with the energy accumulator to store energy in the accumulator or absorb the energy stored in the energy accumulator. At the same time, the energy carrier can transmit cold energy or heat energy to the energy utilization equipment in a balanced and continuous manner, so that the energy utilization equipment can utilize the cold energy or heat energy. The energy carrier circulates throughout the entire operating system, which can realize the simultaneous recovery, storage and supply of cold energy and heat energy, so that cold energy and heat energy can be effectively recovered and utilized, and it is beneficial to improve the efficiency of energy recovery and utilization.

[0069] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A cold energy and heat energy recovery and utilization system, characterized in that: include: A cryogenic storage tank containing a cryogenic medium; The cooler includes a first channel for circulating the cryogenic medium and a second channel for circulating an energy-carrying agent, the first channel and the second channel being independent of each other; the cryogenic storage tank is connected to an inlet of the first channel via a pipeline, the cryogenic medium enters the first channel and is capable of exchanging energy with the energy-carrying agent circulating in the second channel; an accumulator containing an energy-storing agent for storing energy, the accumulator comprising a high-temperature port and a low-temperature port; the low-temperature port of the accumulator being connected to the outlet of the second channel via a pipeline, so that the energy-carrying agent enters the accumulator through the second channel and exchanges energy with the energy-carrying agent; The heater includes a third channel for circulating a high-temperature medium and a fourth channel for circulating the energy-carrying agent, the third channel and the fourth channel being independent of each other; the inlet of the third channel is connected to a heat source via a pipeline, so that the high-temperature medium enters the third channel and can exchange energy with the energy-carrying agent circulating in the fourth channel; the outlet of the fourth channel is connected to a high-temperature port of the accumulator via a pipeline, so that the energy-carrying agent enters the accumulator through the fourth channel and exchanges energy with the energy-carrying agent; the outlet of the fourth channel is connected to the inlet of the second channel of the cooler via a pipeline, so that the energy-carrying agent enters the cooler after flowing through the fourth channel and exchanges energy with the low-temperature medium in the first channel; An energy utilization device, wherein the inlet of the energy utilization device is connected to the high-temperature port and the low-temperature port of the accumulator through a pipeline; the outlet of the energy utilization device is connected to the inlet of the fourth channel and the inlet of the second channel through a pipeline, so that the energy carrier that completes the energy exchange in the energy utilization device enters the heater or the cooler.

2. The cold energy and heat energy recovery and utilization system according to claim 1 is characterized in that: The outlet of the energy utilization device is connected to the inlet of the fourth channel of the warmer through a pipeline, and is connected to the inlet of the second channel of the cooler and the high-temperature port of the accumulator through the fourth channel.

3. The cold energy and heat energy recovery and utilization system according to claim 2, characterized in that: The cold energy and heat energy recovery and utilization system further includes an energy-carrying pump, which is arranged on a pipeline connecting the outlet of the energy utilization device and the inlet of the fourth channel.

4. The cold energy and heat energy recovery and utilization system according to claim 2, characterized in that: The cold energy and heat energy recovery and utilization system further includes a shunt pump, which is arranged on a pipeline connecting the fourth channel and the inlet of the second channel.

5. The cold energy and heat energy recovery and utilization system according to claim 4, characterized in that: The cold energy and heat energy recovery and utilization system includes a connecting main pipe and a first connecting branch pipe and a second connecting branch pipe respectively connected to the outlet of the connecting main pipe; the inlet of the connecting main pipe is connected to the outlet of the fourth channel, the outlet of the first connecting branch pipe is connected to the inlet of the second channel, and the outlet of the second connecting branch pipe is connected to the high-temperature port of the accumulator; the first connecting branch pipe is provided with a fourth control valve and the diversion pump.

6. The cold energy and heat energy recovery and utilization system according to claim 5, characterized in that: The cold energy and heat energy recovery and utilization system also includes a transfer main pipe and a first transfer branch pipe and a second transfer branch pipe connected to the inlet of the transfer main pipe; the outlet of the transfer main pipe is connected to the inlet of the energy utilization equipment, the inlet of the first transfer branch pipe is connected to the second connection branch pipe, and the inlet of the second transfer branch pipe is connected to the low-temperature port of the accumulator; the first transfer branch pipe is provided with a seventh control valve, and the second transfer branch pipe is provided with a third control valve.

7. The cold energy and heat energy recovery and utilization system according to claim 6, characterized in that: The pipeline between the outlet of the second channel and the low-temperature port of the accumulator is a first pipeline, and a first temperature sensor is provided on the first pipeline for measuring the temperature of the energy-carrying agent at the outlet of the second channel; the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the shunt pump, and the controller is electrically connected to the first temperature sensor to control the speed of the shunt pump according to the temperature signal of the energy-carrying agent at the outlet of the second channel measured by the first temperature sensor; A second temperature sensor is provided on the transfer main pipe for measuring the temperature value of the energy-carrying agent at the inlet of the energy utilization equipment; the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the seventh control valve and the third control valve, and the controller is electrically connected to the second temperature sensor to control the opening of the seventh control valve and the third control valve according to the temperature value signal of the energy-carrying agent at the inlet of the energy utilization equipment measured by the second temperature sensor.

8. The cold energy and heat energy recovery and utilization system according to claim 5, characterized in that: A third temperature sensor is provided on the connecting main pipe for measuring the temperature of the energy-carrying agent at the outlet of the fourth channel of the heater; a sixth control valve is provided on the pipeline between the inlet of the third channel and the heat source, and the controller of the cold energy and heat energy recovery and utilization system is electrically connected to the sixth control valve, and the controller is electrically connected to the third temperature sensor to control the opening of the sixth control valve according to the temperature value signal of the energy-carrying agent at the outlet of the fourth channel of the heater measured by the third temperature sensor.

9. The cold energy and heat energy recovery and utilization system according to claim 1, characterized in that: The cold energy and heat energy recovery and utilization system further includes a vaporizer, and the inlet of the vaporizer is connected to the outlet of the first channel through a pipeline.

10. The cold energy and heat energy recovery and utilization system according to claim 9, characterized in that: The cold energy and heat energy recovery and utilization system also includes a second pipeline and a second control valve, one end of the second pipeline is connected to the pipeline between the outlet of the low-temperature storage tank and the inlet of the first channel, and the other end of the second pipeline is connected to the pipeline between the outlet of the first channel and the inlet of the vaporizer; the second control valve is arranged on the second pipeline.

11. The cold energy and heat energy recovery and utilization system according to claim 1, characterized in that: The cold energy and heat energy recovery and utilization system also includes a mobile energy supply device, the outlet of the mobile energy supply device is connected to the low-temperature port of the accumulator through a pipeline, and the inlet of the mobile energy supply device is connected to the high-temperature port of the accumulator through a pipeline.

12. The cold energy and heat energy recovery and utilization system according to claim 11, characterized in that: The pipeline between the outlet of the mobile energy supply device and the low-temperature port of the accumulator includes a first transition pipe and a first external pipe connected to each other, the free end of the first transition pipe being in communication with the low-temperature port of the accumulator, the free end of the first external pipe being in communication with the outlet of the mobile energy supply device, and the first transition pipe and the first external pipe being in communication via a quick-connect connector; The pipeline between the inlet of the mobile energy supply equipment and the high-temperature port of the accumulator includes a second transition pipe and a second external pipe connected to each other, the free end of the second transition pipe is connected to the high-temperature port of the accumulator, the free end of the second external pipe is connected to the inlet of the mobile energy supply equipment, and the second transition pipe and the second external pipe are connected via a quick-connect connector.

13. The cold energy and heat energy recovery and utilization system according to claim 3, characterized in that: The cold energy and heat energy recovery and utilization system further comprises an expansion tank, which is arranged on the pipeline between the outlet of the energy utilization device and the inlet of the energy-carrying pump.

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