Multi-connected supply temperature control system based on cold storage waste heat and geothermal source

Abstract

This utility model discloses a multi-generation temperature control system based on waste heat and cold storage and geothermal sources. It includes a cold storage waste heat recovery and utilization unit, a geothermal source unit, and a waste heat recovery and utilization unit. The cold storage waste heat recovery and utilization unit includes a first pipe, a second pipe, and multiple ventilation branch pipes connected to the first and second pipes, all buried beneath the cold storage. The first pipe, second pipe, and ventilation branch pipes absorb the cold energy from the cold storage floor. The geothermal source unit utilizes the soil and passing air for heat exchange. The combination of the geothermal source unit and the cold storage waste heat recovery and utilization unit provides cooling for the passageway and ambient temperature logistics center. During summer operation, it can lower the temperature of the ambient temperature logistics center and also cool the passageway, ensuring its temperature remains within the required range. In winter, the waste heat from the cold storage refrigeration system and geothermal energy are used to heat the air in the pipes, providing high-temperature hot air to the ambient temperature logistics center, achieving temperature control and waste heat utilization, thus saving energy and reducing emissions.

Description

Technical Field

[0001] This utility model relates to the field of temperature control in ambient temperature logistics centers within comprehensive logistics parks, and in particular to a multi-source temperature control system based on residual cold and heat from cold storage and geothermal sources. Background Technology

[0002] With the expansion of my country's logistics scale, and to meet the diverse storage environment requirements of different goods and improve logistics efficiency and service quality, investment in and construction of comprehensive logistics parks is gradually increasing. Comprehensive logistics parks mainly consist of buildings with varying temperature requirements, such as cold storage facilities, ambient temperature logistics centers, and office areas. Among these, the cold storage floor is a crucial component. Due to the significant temperature difference between the inside and outside of the cold storage floor, heat is exchanged between the floor and the underground soil. When the low temperature is conducted to the soil beneath the floor, the moisture within it freezes. Ice expands by approximately 9% compared to liquid water, generating a powerful frost heave force that exerts a significant lifting impact on the floor structure, resulting in uneven bulging, cracks, and other frost heave phenomena. To address this, existing cold storage facilities often use ventilated floors to remove the cold air from the floor, but this cold air is generally directly discharged into the external environment, leading to wasted cooling capacity. Furthermore, the freezing area of ​​a cold storage facility maintains a constant temperature year-round, and its refrigeration system operates continuously, generating considerable heat from its compressor during operation.

[0003] Ambient temperature logistics centers typically have large building areas and densely packed cargo storage areas, while the personnel-intensive work areas are relatively small. Installing a comprehensive air conditioning system would not only require a huge initial investment but also result in high daily energy consumption. Therefore, ambient temperature logistics centers generally do not have air conditioning systems. In summer, to prevent excessively high temperatures, localized temperature control measures are usually adopted. However, considering the difficulty in isolating the work area from the storage area with protective structures, effective temperature control is challenging, leading to high energy consumption for localized temperature control.

[0004] In summary, it is of great significance to utilize the residual cold and heat from cold storage facilities for ambient temperature logistics centers in order to achieve temperature control in these centers. Summary of the Invention

[0005] In view of this, this utility model proposes a multi-generation temperature control system based on the waste heat and cold storage and geothermal source. This system combines the geothermal source, the waste heat from the cold storage floor and the waste heat from the cold storage refrigeration system to achieve temperature control in the normal temperature logistics center and the passageway, realizing the full utilization of waste heat and waste heat, energy saving and emission reduction, and low carbon and environmental protection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The present invention describes a multi-generation temperature control system based on cold storage waste heat and geothermal source, comprising a cold storage waste heat recovery and utilization unit, a geothermal source unit, and a waste heat recovery and utilization unit for recovering waste heat from the refrigeration system. The cold storage waste heat recovery and utilization unit includes a first pipe, a second pipe, and multiple ventilation branch pipes for connecting the first pipe and the second pipe buried below the cold storage. The first pipe and the multiple ventilation branch pipes are located below the freezing area of ​​the cold storage. Each end of the first pipe is provided with a first fresh air inlet, and each first fresh air inlet is provided with a first electric air valve.

[0008] The second pipe is located below the passageway of the cold storage. A first fan and a second electric air valve are installed at the air outlet of one end of the second pipe, and a fifth electric air valve is installed at the other end. The passageway has multiple first air supply pipes and multiple first air return pipes. The first air return pipe is connected to the first pipe through a connecting pipe and a fourth electric air valve is installed at its air return outlet. The first air supply pipe is connected to the second pipe, and a second fan and a third electric air valve are installed at the air supply outlet of the first air supply pipe.

[0009] The geothermal source unit includes a third pipe, two sets of buried air ducts buried in the soil outside the ambient temperature logistics area, two fourth pipes, and two fifth pipes. One end of each set of buried air ducts is connected to one of the fourth pipes and the other end is connected to one of the fifth pipes. Both fourth pipes are connected to the third pipe. Multiple second air supply pipes are connected to the third pipe. Each second air supply pipe has multiple second air outlets located within the ambient temperature logistics area. Each second air outlet is equipped with a third fan and a ninth electric air valve. Each fifth pipe is connected to a second return air pipe. The return air outlet of the second return air pipe is located within the ambient temperature logistics area and is equipped with a tenth electric air valve. Each fifth pipe is also connected to multiple second fresh air outlets equipped with eleventh electric air valves.

[0010] The other end of the second pipe is connected to the third pipe. An eighth electric air valve is connected between one of the fourth pipes and the third pipe, and a seventh electric air valve is installed between the other fourth pipe and the third pipe.

[0011] The beneficial effects are: This utility model, based on waste cooling, waste heat, and geothermal energy, can achieve summer cooling and winter heating of a normal-temperature logistics center, and can also supplement cooling capacity to the cold storage passageway, saving energy, reducing emissions, and being environmentally friendly. Specifically: This utility model has a first pipe, a second pipe, and ventilation branch pipes buried under the cold storage, which can cool the air inside the pipes to a certain temperature; in addition, in summer, the soil temperature is lower than the ambient temperature, and the geothermal source unit can cool the air to a certain temperature. The geothermal source unit and the cold storage waste cooling recovery unit combine to provide cooling capacity to the passageway and the normal-temperature logistics center, keeping the temperature of the normal-temperature logistics center low during summer operation; it can also cool the passageway, ensuring that the temperature in the passageway is within the required range. In winter, this utility model uses the waste heat from the cold storage refrigeration system and geothermal energy to heat the air inside the pipes, providing hot air of a certain temperature to the normal-temperature logistics center.

[0012] Preferably, the waste heat recovery and utilization unit includes a heat exchanger, the heat source side of which is connected to the waste heat recovery pipeline of the refrigeration system to form a waste heat recovery circulation loop, and a circulation pump and an electrically controlled valve are provided on the waste heat recovery circulation loop; the second pipeline and the third pipeline are both connected to the heat use channel of the heat exchanger.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This invention utilizes the waste heat and residual cooling generated by the cold storage and geothermal energy sources to achieve temperature control in a normal-temperature logistics center. It also provides cooling for the passageways of the cold storage, enabling waste heat reuse, energy conservation, emission reduction, and low-carbon environmental protection. Specifically, this invention features a first pipe, a second pipe, and ventilation branch pipes buried beneath the cold storage. These pipes cool the air within the pipes to a certain temperature. Additionally, in summer, when the soil temperature is lower than the ambient temperature, the geothermal energy source unit cools the air to a certain temperature. The geothermal energy source unit, combined with the cold storage waste heat recovery unit, provides cooling to the passageways and the normal-temperature logistics center, keeping the logistics center cool during summer operation and ensuring the passageway temperature remains within the required range. In winter, this invention uses the waste heat from the cold storage refrigeration system and geothermal energy to heat the air within the pipes, providing hot air to the normal-temperature logistics center. This invention, based on waste heat, residual cooling, and geothermal energy, can achieve summer cooling and winter heating in a normal-temperature logistics center, and can also supplement cooling to the passageways of the cold storage, achieving energy conservation, emission reduction, and environmental protection. Attached Figure Description

[0015] Figure 1 This is a frontal view of the present invention.

[0016] Figure 2 This is a top view of the present invention. Detailed Implementation

[0017] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0018] It should be noted that in the description of this utility model, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1-2 As shown, this utility model proposes a multi-generation temperature control system based on cold storage waste heat and geothermal sources. It includes a cold storage waste heat recovery and utilization unit, a geothermal source unit, and a waste heat recovery and utilization unit for recovering waste heat from the refrigeration system. The cold storage waste heat recovery and utilization unit includes a first pipe 101, a second pipe 102 buried below the cold storage, and multiple ventilation branch pipes 103 connecting the first pipe 101 and the second pipe 102. The first pipe 101 and the multiple ventilation branch pipes 103 are located below the freezing zone of the cold storage, the second pipe 102 is located below the passageway, and the ventilation branch pipes 103 are located between the first pipe 101 and the second pipe 102. Their diameter is controlled between 600 mm and 800 mm, and the spacing between the ventilation branch pipes 103 can be controlled between 2m and 3m. For areas with lower freezing temperatures, the corresponding ground temperature is also relatively low, and the spacing of the ventilation branch pipes 103 in this location can be appropriately smaller, such as controlling the center-to-center spacing of the ventilation branch pipes 103 at 2m.

[0021] Each end of the first duct 101 is provided with a first fresh air inlet (there may be two or more first fresh air inlets). Each first fresh air inlet is provided with a first electric air valve F1 and a filter element (the filter element may be a filter screen or a ventilation louver) to prevent birds and leaves from entering the cold storage waste cold recovery unit.

[0022] The second pipe 102 has a first fan 104 and a second electric air valve F2 installed at one end of its air outlet, and a fifth electric air valve F5 installed at the other end; the passageway has multiple first air supply pipes 105 and multiple first air return pipes 106. The first air return pipe 106 is connected to the first pipe 101 through a connecting pipe 107 and has a fourth electric air valve F4 installed at its air return outlet. The first air supply pipe 105 is connected to the second pipe 102, and the air supply outlet of the first air supply pipe 105 is equipped with a second fan 108 and a third electric air valve F3.

[0023] When significant cold air loss occurs in the passageway, the cold storage waste cold recovery unit can be used to replenish the cold air in the passageway, reducing its overall coldness. The specific working process is as follows: Open the first electric air valve F1, the third electric air valve F3, the fourth electric air valve F4, and the second fan 108. Fresh air from outside enters the first duct 101, then through the ventilation branch duct 103 into the second duct 102, and then through the air outlet of the first air supply duct 105 into the passageway. Return air enters the first duct 101 through the first return air duct 106, and then is diverted from the first duct 101 to the ventilation branch duct 103. The return air and fresh air re-enter the passageway through the ventilation branch duct 103 and the second duct 102, realizing the reuse of waste cold air from the cold storage floor, achieving energy conservation, emission reduction, and low-carbon environmental protection.

[0024] Combination Figure 1-2 It is known that the geothermal source unit includes a third pipe 201, two sets of buried air pipes 202 buried in the soil outside the normal temperature logistics area, two fourth pipes 203 and two fifth pipes 204. The buried air pipes 202 are laid flat and have a diameter of 300 mm to 400 mm. One end of each set of buried air pipes 202 is connected to a fourth pipe 203 and the other end is connected to a fifth pipe 204. Both fourth pipes 203 are connected to the third pipe 201. An eighth electric air valve F8 is connected between one of the fourth pipes 203 and the third pipe 201, and a seventh electric air valve F7 is installed between the other fourth pipe 203 and the third pipe 201.

[0025] The third duct 201 is connected to multiple second air supply ducts 205. Each second air supply duct 205 has multiple vertical air supply branches 206. The air supply branches 206 extend upward to the ambient temperature logistics area. The air supply branches 206 are close to the columns of the ambient temperature logistics area. Each air supply branch 206 is equipped with a third fan and a ninth electric air valve F9 at its second air outlet. Each fifth duct 204 is connected to a second return air duct 207. The second return air duct 207 has multiple vertical return air outlets located at the front and rear ends of the ambient temperature logistics area. Each return air outlet is equipped with a tenth electric air valve F10. Each fifth duct 204 also has multiple second fresh air outlets. Each second fresh air outlet is equipped with a filter and an eleventh electric air valve F11.

[0026] In actual operation, if the temperature of the ambient temperature logistics center is lower than the design requirement, the geothermal source unit can be used to cool the ambient temperature logistics center (usually in summer) to achieve temperature control. The specific process is as follows: Start the third fan, open the seventh electric air valve F7, the eighth electric air valve F8, the ninth electric air valve F9, the tenth electric air valve F10, and the eleventh electric air valve F11. The outside fresh air and the return air of the ambient temperature logistics center enter the buried air duct 202 through the fifth pipe 204, and then enter the third pipe 201 through the buried air duct 202 and the fourth pipe 203. The air is cooled by the geothermal source, and the cooled air enters the ambient temperature logistics center through the second air supply pipe 205 to achieve the cooling of the ambient temperature logistics center.

[0027] In actual installation, the ventilation branch pipe 103 and the buried air duct 202 of this utility model can be arranged in a straight line. Of course, they can also be laid out in an S-shape or C-shape.

[0028] To meet the cooling needs of the passageway and ambient temperature logistics center, the geothermal source unit and the cold storage waste heat recovery and utilization unit of this utility model are interconnected. Combined with... Figure 1-2 It is known that one end of the second pipe 102 (the end with the fifth electric air valve F5) is connected to the third pipe 201. When the residual cold of the cold storage cannot meet the needs of the passageway, the passageway can be cooled by means of the geothermal source unit: start the second fan 108, open the third electric air valve F3, the fourth electric air valve F4, the fifth electric air valve F5, the eighth electric air valve F8 and the eleventh electric air valve F11, and keep the other valves closed. The return air of the passageway enters the first pipe 101 through the first return air pipe 106, and then enters the passageway through the first pipe 101, the ventilation branch pipe 103 and the second pipe 102. The fresh air from the outside enters the buried air pipe 202 through the fifth pipe 204, and then enters the second pipe 102 through the buried air pipe 202 and the third pipe 201. Finally, it enters the passageway through the first supply air pipe 105. The passageway is cooled by the geothermal source and residual cold.

[0029] In actual operation, since the second pipe 102 and the third pipe 201 are connected, the cold storage waste cooling recovery unit can be used to cool the ambient temperature logistics center. The first fan 104 is started, and the first electric air valve F1, the fifth electric air valve F5, the eighth electric air valve F8, the ninth electric air valve F9 and the tenth electric air valve F10 are opened. Outside fresh air enters the first pipe 101, and then enters the ambient temperature logistics center through the first pipe 101 and the third pipe 201 to cool the ambient temperature logistics center. The return air enters one of the buried air ducts 202, mixes with the low temperature fresh air in the third pipe 201, and enters the ambient temperature logistics center area again to achieve cooling.

[0030] If both the passageway and the ambient temperature logistics center need cooling, the residual cold air from the cold storage is used for cooling first. The second fan 108 and the third fan are started, and the first electric air valve F1, the third electric air valve F3, the fourth electric air valve F4, the fifth electric air valve F5, the eighth electric air valve F8, the ninth electric air valve F9, and the tenth electric air valve F10 are opened to simultaneously cool the passageway and the ambient temperature logistics center using the residual cold air from the cold storage. If the residual cold air from the cold storage is insufficient (temperature sensors can be installed in the ventilation branch pipes or the second pipe 102 for temperature detection), the first electric air valve F1 is closed, and fresh air is supplied by the geothermal source unit to achieve simultaneous cooling of the passageway and the ambient temperature logistics center.

[0031] Combination Figure 1-2 It is understood that the waste heat recovery and utilization unit includes a heat exchanger 301 and a sixth pipe 302. The heat source side of the heat exchanger 301 is connected to the waste heat recovery pipe of the refrigeration system (the compressor of the refrigeration system dissipates heat during operation) to form a waste heat recovery circulation loop. A circulation pump 303 and an electrically controlled valve are installed on the waste heat recovery circulation loop. The heat-using channel of the heat exchanger 301 is connected in series with the sixth pipe 302. The sixth pipe 302 has a third fresh air inlet, the other end of which is connected to the third pipe 201. A sixth electric air valve F6 is installed on the sixth pipe 302. The waste heat generated by the refrigeration system can be exchanged through the heat exchanger 301 to the fresh air passing through the sixth pipe 302 to meet the needs of the ambient temperature logistics center. In winter, the cold storage floor needs ventilation to prevent frost heave, while the ambient temperature logistics center usually needs to be heated. In response, during actual operation, the first fan 104 is activated, and the first electric air valve F1, the second electric air valve F2, the third electric air valve F3, and the fourth electric air valve F4 are opened. Fresh air from the outside is carried away by the cold air through the first pipe 101 and the ventilation branch pipe 103, and is discharged by the first fan 104. The fifth electric air valve F5 is in the closed state. While meeting the ventilation requirements of the cold storage floor, the low-temperature air of the cold chain of the cold storage floor is prevented from entering the third pipe 201.

[0032] In winter, to meet the heating needs of the ambient temperature logistics center, the third fan is activated, and the sixth, seventh, eighth, ninth, and tenth electric air valves F6, F7, F8, F9, and F10 are opened, while ensuring that the eleventh electric air valve F11 is closed. During this process, waste heat exchanges heat with the fresh air passing through the sixth duct 302, turning the fresh air into high-temperature fresh air, which then enters the ambient temperature logistics center through the third duct 201 and the second air supply duct 205. The return air from the ambient temperature logistics center exchanges heat with the soil through the buried air duct 202 before entering the third duct 201. The high-temperature return air and high-temperature fresh air mix in the third duct 201 and re-enter the ambient temperature logistics center until the temperature of the ambient temperature logistics center reaches ambient temperature. This process prioritizes the use of waste heat from the refrigeration system. If the waste heat is insufficient, the sixth electric air valve F6 can be closed and the eleventh electric air valve F11 opened, allowing fresh air to enter the buried duct, be heated, and then enter the ambient temperature logistics center through the third duct 201.

[0033] This invention utilizes the residual heat and cold generated by the cold storage and geothermal energy to achieve temperature control in a normal-temperature logistics center. It also provides cooling for the passageways of the cold storage, enabling waste heat reuse, energy conservation, emission reduction, and low-carbon environmental protection. Specifically, this invention features a first pipe 101, a second pipe 102, and a ventilation branch pipe 103 buried beneath the cold storage. These pipes cool the air within the pipes to a certain temperature. Furthermore, in summer, when the soil temperature is lower than the ambient temperature, the geothermal energy unit cools the air to a certain temperature. The combination of the geothermal energy unit and the cold storage waste heat recovery unit provides cooling for the passageways and the normal-temperature logistics center. During summer operation, this helps maintain the temperature of the normal-temperature logistics center and cools the passageways, ensuring the temperature within the required range. In winter, this invention utilizes the waste heat from the cold storage refrigeration system and soil heat to heat the fresh and return air, providing air at a certain temperature to the normal-temperature logistics center.

[0034] To enhance automation during actual installation, this invention also includes a controller. All the electric air valves in this invention are electric valves. The control input terminal of the electric air valve is connected to the control output terminal of the controller, and the control output terminal of the controller is connected to the control input terminals of the three fans. The controller controls the opening and closing of each electric air valve and each fan to meet the system's operational requirements. The controller can be a PLC (Programmable Logic Controller) or an industrial control computer with important computer attributes and characteristics, such as a CPU, hard disk, memory, peripherals and interfaces, an operating system, control network and protocols, computing power, and a user-friendly human-machine interface. Furthermore, the controller can also be equipped with a wireless communication module to connect to a remote terminal, receive control commands from the remote terminal, and provide feedback on relevant parameters of the real-time operating status.

[0035] Finally, it should be emphasized that the above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi -supply temperature control system based on cold storage waste heat and geothermal source, characterized in that: The system includes a cold storage waste heat recovery and utilization unit, a geothermal source unit, and a waste heat recovery and utilization unit for recovering waste heat from the refrigeration system. The cold storage waste heat recovery and utilization unit includes a first pipe, a second pipe, and multiple ventilation branch pipes for connecting the first pipe and the second pipe buried below the cold storage. The first pipe and the multiple ventilation branch pipes are located below the freezing area of ​​the cold storage. Each end of the first pipe is provided with a first fresh air inlet, and each first fresh air inlet is provided with a first electric air valve. The second pipe is located below the passageway of the cold storage. A first fan and a second electric air valve are installed at the air outlet of one end of the second pipe, and a fifth electric air valve is installed at the other end. The passageway has multiple first air supply pipes and multiple first air return pipes. The first air return pipe is connected to the first pipe through a connecting pipe and a fourth electric air valve is installed at its air return outlet. The first air supply pipe is connected to the second pipe, and a second fan and a third electric air valve are installed at the air supply outlet of the first air supply pipe. The geothermal source unit includes a third pipe, two sets of buried air ducts buried in the soil outside the ambient temperature logistics area, two fourth pipes, and two fifth pipes. One end of each set of buried air ducts is connected to one of the fourth pipes and the other end is connected to one of the fifth pipes. Both fourth pipes are connected to the third pipe. Multiple second air supply pipes are connected to the third pipe. Each second air supply pipe has multiple second air outlets located within the ambient temperature logistics area. Each second air outlet is equipped with a third fan and a ninth electric air valve. Each fifth pipe is connected to a second return air pipe. The return air outlet of the second return air pipe is located within the ambient temperature logistics area and is equipped with a tenth electric air valve. Each fifth pipe is also connected to multiple second fresh air outlets equipped with eleventh electric air valves. The other end of the second pipe is connected to the third pipe. An eighth electric air valve is connected between one of the fourth pipes and the third pipe, and a seventh electric air valve is installed between the other fourth pipe and the third pipe.

2. The multi -supply temperature control system based on cold storage residual heat and geothermal source of claim 1, characterized in that: The waste heat recovery and utilization unit includes a heat exchanger and a sixth pipe. The heat source side of the heat exchanger is connected to the waste heat recovery pipe of the refrigeration system to form a waste heat recovery circulation loop. A circulation pump and an electrically controlled valve are installed on the waste heat recovery circulation loop. The heat-using channel of the heat exchanger is connected in series on the sixth pipe, and the sixth pipe has a third fresh air inlet, the other end of which is connected to the third pipe.

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