A pre-fabricated heat exchange plate system

Abstract

The utility model relates to building energy -conserving and geothermal energy application technical field, concretely discloses a prefabricated heat exchange plate system, including heat exchange plate monomer, fluid circulation module and circulating medium source, the heat exchange plate monomer is provided with a plurality, the heat exchange plate monomer is attached to the pipe gallery inner wall surface through self -adhesive layer, the fluid circulation module is connected the heat exchange plate monomer and circulating medium source through the pipeline, to form the closed circulation passageway. The utility model's purpose lies in solved the problem that the traditional ground -buried pipe heat exchanger occupies the space is bigger and the construction cost is higher, avoids using cooling tower simultaneously, solves the problem that the cooling tower brings when using, arranges the land, noise, drifts water, city landscape etc.

Description

Technical Field

[0001] This utility model relates to the field of building energy conservation and geothermal energy application technology, specifically to a prefabricated heat exchange plate system. Background Technology

[0002] Ground source heat pumps are one of the most promising refrigeration and air conditioning technologies of the 21st century, with energy-saving and environmentally friendly benefits. The principle of using ground source heat pumps for air conditioning temperature regulation is as follows: the ground source heat pump unit extracts heat from the buried pipes and exchanges heat with the air conditioning system, utilizing the energy storage function of the earth. It has significant environmental benefits, high efficiency and energy saving, low operating costs, and safe, stable operation with high reliability.

[0003] Ground source heat pump systems are energy-saving and environmentally friendly technologies that utilize renewable geothermal energy to provide heating and cooling to indoor spaces. They achieve the transfer of heat from low-grade to high-grade energy by inputting a small amount of high-grade energy. Buried pipe heat exchangers are crucial devices in ground source heat pump systems for extracting heat from the soil; their heat exchange performance and arrangement significantly impact the overall system reliability and applicability.

[0004] Currently, underground cooling systems typically employ a combination of chiller units and surface cooling towers. With the increasing development of urban underground spaces, these buildings are often located in the city's core areas, and the placement of surface cooling towers often faces several challenges: These areas have high building density, making it difficult to find suitable locations for cooling towers. In addition, cooling towers are prone to complaints from nearby residents due to issues such as water drift, Legionella, and noise. Furthermore, conventional vertical buried pipe ground source heat pumps require a large site for drilling and pipe installation, which is costly and time-consuming, making it difficult to meet the energy supply needs of high-load underground buildings. Utility Model Content

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of this utility model is to solve the problems of large space occupation and high construction cost of traditional buried pipe heat exchangers, while avoiding the use of cooling towers and solving the problems of land use, noise, water drift and urban landscape caused by the use of cooling towers; and can replace some traditional high carbon emission cold and heat sources, and improve the utilization level of renewable energy and energy efficiency of centralized energy stations.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A prefabricated heat exchange plate system includes heat exchange plate units, a fluid circulation module, and a circulation medium source. Multiple heat exchange plate units are provided. The heat exchange plate units are attached to the surface of the enclosure structure by a self-adhesive layer. The fluid circulation module is connected to the heat exchange plate units and the circulation medium source through pipelines. The fluid circulation module includes a circulation pump, a water distributor, and a water collector. The heat exchange plate unit is connected to the water collector via a pipeline. The other end of the water collector is connected to the circulation pump via a pipeline. The outlet of the circulation pump is connected to the inlet of the circulation medium source. The outlet of the circulation medium source is connected to the water distributor. The other end of the water distributor is connected to the heat exchange plate unit, forming a complete circulation loop.

[0007] As a further embodiment of this utility model, the heat exchange plate unit includes a rectangular flat tube, which is arranged in a serpentine pattern, and the rectangular flat tube is made of aluminum alloy with a wall thickness of 0.8-1.2mm.

[0008] As a further embodiment of this utility model, the dimensions of the heat exchange plate unit are 600mm×1200mm×30mm.

[0009] As a further embodiment of this utility model, the distance between adjacent heat exchanger plates is 80mm, forming a vertical air convection channel.

[0010] As a further embodiment of this utility model, a constant pressure module is also provided. The constant pressure module includes a constant pressure pipeline, which is connected to the circulation loop. The connection point is the low-pressure area of ​​the circulation pump inlet. The other end of the constant pressure pipeline is externally connected to a medium storage device.

[0011] As a further embodiment of this utility model, a pressure-regulating water tank and a water replenishment pump are sequentially arranged on the pressure-regulating pipeline, and an elastic diaphragm is provided inside the pressure-regulating water tank.

[0012] As a further embodiment of this utility model, an electronic water treatment device is provided between the constant pressure pipeline and the inlet of the circulating pump.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The prefabricated heat exchange plate system of this utility model is attached to the surface of the underground building envelope by self-adhesive heat exchange plate, which solves the problems of large space occupation and high construction cost of traditional buried pipe heat exchangers. At the same time, it avoids the use of cooling towers and solves the problems of land use, noise, water drift and urban landscape caused by the use of cooling towers. It can also replace some traditional high carbon emission cold and heat sources and improve the renewable energy utilization level and energy efficiency level of centralized energy stations.

[0014] (2) The prefabricated heat exchange plate system of this utility model improves the heat accumulation phenomenon of buried tube heat exchanger heat pump by utilizing the shallow burial depth, horizontal and vertical combination of the enclosure structure in underground buildings.

[0015] (3) The prefabricated heat exchange plate system of this utility model can make full use of renewable natural resources by obtaining energy from shallow geothermal energy. At the same time, it can effectively recover and utilize the waste heat generated by underground building equipment. The system is reliable in operation, has obvious energy-saving effect and improves environmental benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the diagram: 1. Heat exchanger plate unit; 2. Fluid circulation module; 3. Circulation medium source; 4. Constant pressure module; 5. Electronic water treatment device; 101. Rectangular flat tube; 201. Circulation pump; 202. Water distributor; 203. Water collector; 401. Constant pressure water tank; 402. Make-up water pump. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0021] Underground space enclosure structures have extensive surfaces in direct contact with internal heat sources, and there is continuous waste heat emission of 40-60°C in equipment concentration areas, providing excellent conditions for recovering low-grade heat energy. Therefore, based on heat pump technology, combining prefabricated heat exchange plates with the enclosure structure surface can achieve high power density heat exchange while reducing equipment installation costs.

[0022] Please see the appendix Figure 1 A prefabricated heat exchange plate system includes a heat exchange plate unit 1, a fluid circulation module 2, and a circulation medium source 3. Multiple heat exchange plate units 1 are provided. The heat exchange plate units 1 are attached to the surface of the enclosure structure by a self-adhesive layer. The fluid circulation module 2 is connected to the heat exchange plate units 1 and the circulation medium source 3 by pipelines. The fluid circulation module 2 includes a circulation pump 201, a water distributor 202, and a water collector 203. The heat exchange plate unit 1 is connected to the water collector 203 via a pipeline. The other end of the water collector 203 is connected to the circulation pump 201 via a pipeline. The outlet of the circulation pump 201 is connected to the inlet of the circulation medium source 3, and the outlet of the circulation medium source 3 is connected to the water distributor 202. The other end of the water distributor 202 is connected to the heat exchange plate unit 1, forming a complete circulation loop. This allows the heat transfer fluid to circulate within the system, achieving heat extraction and transfer.

[0023] The heat exchanger unit 1 includes rectangular flat tubes 101 arranged in a serpentine pattern. The rectangular flat tubes 101 are made of aluminum alloy with a wall thickness of 0.8-1.2 mm. The dimensions of the heat exchanger unit 1 are 600 mm × 1200 mm × 30 mm. The aluminum alloy tube has a cross-sectional dimension of 15 mm × 3 mm (length to width ratio 5:1) and is filled with phase change material. Multiple heat exchanger units 1 are connected in parallel or series to form a plate group, and multiple plate groups are then connected to the fluid circulation module 2.

[0024] The distance between adjacent heat exchanger units 1 is 80mm, forming a vertical natural air convection channel. When the temperature of heat exchanger unit 1 rises due to absorbing waste heat from the equipment inside the enclosure structure, hot air rises along the channel, and cold air is replenished from the bottom, forming a continuous airflow that effectively carries away the heat and stabilizes the surface temperature of heat exchanger unit 1 within a controllable range, avoiding efficiency degradation caused by heat accumulation.

[0025] A pressure-regulating module 4 is also provided, which is used to maintain the stability of the heat transfer fluid circulation pressure. The pressure-regulating module 4 includes a pressure-regulating pipeline connected to the circulation loop at the low-pressure area of ​​the circulation pump 201 inlet. The other end of the pressure-regulating pipeline is externally connected to a medium storage device. The medium storage device is used to replenish the heat transfer fluid; it is commercially available and is existing technology, therefore it will not be described in detail here.

[0026] A constant-pressure water tank 401 and a water replenishment pump 402 are sequentially installed on the constant-pressure pipeline. An elastic diaphragm is installed inside the constant-pressure water tank 401. When the pressure in the circulation pipeline exceeds the set value (0.2 MPa) due to temperature rise, some heat transfer fluid is forced into the constant-pressure water tank 401, compressing the elastic diaphragm and causing the pipeline pressure to drop. When the pipeline temperature decreases and the pressure drops, the elastic diaphragm expands, pushing the stored liquid back into the pipeline. A pressure sensor is externally installed on the water replenishment pump 402. This pressure sensor is existing technology and can be purchased commercially; it will not be described in detail here. The water replenishment pump 402 replenishes liquid from the medium storage device into the constant-pressure water tank 401 based on the signal from the pressure sensor, maintaining stable pressure inside the tank.

[0027] It should be noted that a pressure sensor is installed at the inlet of the circulating pump 201. When the pressure is detected to be continuously lower than the set lower limit, the water replenishment pump 402 will be automatically started to replenish the liquid, effectively dealing with abnormal situations such as system leakage.

[0028] An electronic water treatment device 5 is installed between the constant pressure pipeline and the inlet of the circulating pump 201. The electronic water treatment device is existing technology and can be purchased on the market, so it will not be described in detail here. The electronic water treatment device 5 treats the cooling water in the constant pressure pipeline to achieve functions such as scale prevention and removal, sterilization, and corrosion prevention.

[0029] In use, the heat exchanger unit 1 is directly and tightly attached to the inner surface of the underground building's enclosure structure using its own high-strength self-adhesive layer. This integrated installation method does not require additional drilling or bracket fixing. The installation of the heat exchanger unit 1 can be completed in just three steps: positioning, bonding, and compaction, which greatly improves construction efficiency and enables rapid deployment.

[0030] Each heat exchange plate can directly contact the waste heat of equipment in the underground space, such as the 40-60℃ heat continuously generated by fans and water pumps in the pipe gallery. Externally, it indirectly contacts the soil source side through the enclosure structure. The temperature of the shallow underground soil is stable at 10-20℃ throughout the year, making it a natural energy buffer carrier.

[0031] During the heating and cooling seasons, the heat exchange plate unit 1, fluid circulation module 2, and circulation medium source 3 form a complete circulation loop through a closed pipeline system. Relying on the circulation medium as an energy carrier, it can achieve efficient extraction and utilization of low-grade air energy and geothermal energy in underground space, thereby improving the renewable energy utilization level of the cold and heat source system.

[0032] During the heating season, after the circulation loop is started, the medium is distributed by the distributor 202 to the rectangular flat tubes 101 of each heat exchanger unit 1. As the medium flows within the rectangular flat tubes 101, it simultaneously absorbs waste heat from underground equipment and stable heat energy from the soil outside the enclosure structure through the aluminum alloy tube walls. This process heats the medium, which then flows into the collector 203. The medium is then collected by the collector 203 and transported by the circulation pump 201 to the circulating medium source 3, thus serving as a renewable heat source.

[0033] During the cooling season, the circuit operation logic is reversed. After the medium enters the heat exchange plate unit 1, it dissipates heat to the underground space and the surrounding soil. The cooled medium is collected by the water collector 203 and sent to the circulating medium source 3. The released heat is transferred to the soil for storage, replacing the traditional cooling tower to achieve a noiseless and water-free heat dissipation process, perfectly solving the problems of land scarcity and water waste.

[0034] Finally, it should be noted that the water distributor, water collector, circulating pump, constant pressure water tank and other components involved in this utility model are all general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connection between each electrical component is completed in the order of operation. The detailed connection method is a technology known in the art.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A prefabricated heat exchanger plate system, characterized in that, It includes a heat exchange plate unit (1), a fluid circulation module (2) and a circulation medium source (3). Multiple heat exchange plate units (1) are provided. The heat exchange plate units (1) are attached to the surface of the enclosure structure through a self-adhesive layer. The fluid circulation module (2) is connected to the heat exchange plate unit (1) and the circulation medium source (3) through pipelines. The fluid circulation module (2) includes a circulation pump (201), a water distributor (202), and a water collector (203). The heat exchange plate unit (1) is connected to the water collector (203) through a pipeline. The other end of the water collector (203) is connected to the circulation pump (201) through a pipeline. The outlet of the circulation pump (201) is connected to the inlet of the circulation medium source (3). The outlet of the circulation medium source (3) is connected to the water distributor (202). The other end of the water distributor (202) is connected to the heat exchange plate unit (1), forming a complete circulation loop.

2. The prefabricated heat exchanger system according to claim 1, characterized in that, The heat exchange plate unit (1) includes a rectangular flat tube (101), which is arranged in a serpentine pattern. The rectangular flat tube (101) is made of aluminum alloy with a wall thickness of 0.8-1.2mm.

3. The prefabricated heat exchanger system according to claim 1, characterized in that, The dimensions of the heat exchange plate unit (1) are 600mm×1200mm×30mm.

4. The prefabricated heat exchanger system according to claim 1, characterized in that, The distance between adjacent heat exchanger plates (1) is 80 mm, forming a vertical air natural convection channel.

5. A prefabricated heat exchanger system according to claim 1, characterized in that, It is also equipped with a constant pressure module (4), which includes a constant pressure pipeline. The constant pressure pipeline is connected to the circulation loop, and the connection point is the low pressure area of ​​the inlet of the circulation pump (201). The other end of the constant pressure pipeline is externally connected to a medium storage device.

6. A prefabricated heat exchanger system according to claim 5, characterized in that, A pressure-regulating water tank (401) and a water replenishment pump (402) are sequentially installed on the pressure-regulating pipeline, and an elastic diaphragm is installed inside the pressure-regulating water tank (401).

7. A prefabricated heat exchanger system according to claim 5, characterized in that, An electronic water treatment device (5) is installed between the constant pressure pipeline and the inlet of the circulating pump (201).

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