Cooling system driven by low-temperature heat source

Abstract

The invention provides a heat dissipation system driven by a low-temperature heat source, and the system comprises a low-temperature fluid channel which is used for conveying a low-temperature heat source fluid; the organic working medium storage tank is used for storing an organic working medium; the organic working medium pump is connected with the organic working medium storage tank and is used for pumping an organic working medium; the organic working medium evaporator is connected with the low-temperature fluid channel and the organic working medium pump and is used for transferring heat of a low-temperature heat source to an organic working medium to evaporate the organic working medium; the piston expander power device is connected with the organic working medium evaporator and used for absorbing heat of the organic working medium and converting the heat into mechanical power; and the heat dissipation device is connected with the piston expander power device and receives mechanical power output by the piston expander power device so as to carry out vibration heat dissipation. According to the heat dissipation system driven by the low-temperature heat source, direct and efficient utilization of low-temperature waste heat can be achieved, the low-temperature waste heat does not need to be converted into electric energy or does not need to rotate at a high speed, and efficiency loss and system complexity caused by energy form conversion are avoided.

Description

Technical Field

[0001] This application relates to the field of heat conversion technology, and more specifically, to a heat dissipation system driven by a low-temperature heat source. Background Technology

[0002] Although low-temperature heat sources (such as geothermal energy at 40-60℃ and industrial waste heat) are enormous in volume, their conversion into electrical or mechanical energy is inefficient and uneconomical due to the constraints of the second law of thermodynamics. Meanwhile, many industrial processes (such as power plant condensate cooling and supercritical CO2 cycles) require additional energy (e.g., to drive fans and pumps) to dissipate this low-temperature heat, resulting in energy waste.

[0003] Piston expanders are a feasible solution for recovering low-temperature waste heat, but they have low power output and low rotational speed. Converting this low power into the high-speed rotational motion required to drive a fan or water pump via gears or other mechanisms is not only inefficient but also increases system complexity and cost. Therefore, how to directly and efficiently utilize this low-speed, low-power output has become a key challenge for its widespread application in the field of low-temperature heat source recovery. Summary of the Invention

[0004] This application provides at least one heat dissipation system driven by a low-temperature heat source. This system can achieve direct and efficient utilization of low-temperature waste heat without converting it into electrical energy or high-speed rotational motion, thus avoiding efficiency loss and system complexity caused by energy form conversion.

[0005] This application provides a heat dissipation system driven by a low-temperature heat source, comprising: Cryogenic fluid channel, used to transport cryogenic heat source fluid; Organic working fluid storage tanks are used to store organic working fluids. An organic working fluid pump, connected to the organic working fluid storage tank, is used to pump organic working fluid; An organic working fluid evaporator, connected to the low-temperature fluid channel and the organic working fluid pump, is used to transfer heat from the low-temperature heat source to the organic working fluid, causing it to evaporate; The piston expander power unit is connected to the organic working fluid evaporator and is used to absorb the heat of the organic working fluid and convert it into mechanical power. A heat dissipation device is connected to the power unit of the piston expander and receives the mechanical power output by it for vibration heat dissipation.

[0006] In one optional embodiment, the organic working fluid pump is a variable frequency pump.

[0007] In one optional embodiment, the piston expander power unit adopts a multi-cylinder parallel output form.

[0008] In one optional embodiment, the piston expander power unit is a flexible piston expander.

[0009] In one optional embodiment, the heat dissipation device includes: The chassis is equipped with positioning grooves; The tray is adjustable and mounted on the chassis. A heat dissipation coil is installed on the tray, which can achieve vibration heat dissipation when the tray is raised and lowered; A push rod passes through the positioning groove and is connected to the tray, and can move axially back and forth in the positioning groove to drive the tray to rise and fall; A connecting assembly connects the push rod to the output shaft of the piston expander power unit, and is capable of rotating around the output shaft of the piston expander power unit and driving the push rod to reciprocate axially.

[0010] In one optional embodiment, the heat dissipation coil has an overall hyperbolic spiral shape.

[0011] In one optional embodiment, the connecting assembly includes a rocker arm and a connecting rod. One end of the rocker arm is connected to the output shaft of the piston expander power unit and can rotate with the output shaft. One end of the connecting rod is rotatably connected to the rocker arm, and the other end is rotatably connected to the push rod.

[0012] In one optional embodiment, the heat dissipation device further includes: The inlet hose and outlet hose are connected to the inlet and outlet ends of the heat dissipation coil, respectively, and can deform to fit the heat dissipation coil when it vibrates.

[0013] In one optional embodiment, the heat dissipation device further includes: The guide post is disposed on the chassis and slides in cooperation with the pallet to guide the pallet.

[0014] The above-mentioned technical solution of this application has the following beneficial technical effects: The heat dissipation system driven by the low-temperature heat source in this application embodiment drives the circulation of organic working fluid by the heat from the low-temperature heat source, and uses a piston expander to directly convert the thermal energy of the working fluid into mechanical energy to drive the heat dissipation device. This achieves direct and efficient utilization of low-temperature waste heat without converting it into electrical energy or high-speed rotation. It avoids efficiency loss and system complexity caused by energy form conversion, and uses vibration to enhance the heat dissipation process, thereby significantly improving the economy and practicality of low-temperature heat source recovery.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this application and, together with the specification, serve to explain the technical solutions of this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a heat dissipation system driven by a low-temperature heat source is shown in an embodiment of this application. Figure 2 This invention provides an assembly diagram of the piston expander power unit and cooling device according to an embodiment of the present application. Figure 3 It shows Figure 2 Exploded view; Figure 4 It shows Figure 3 A schematic diagram of the chassis structure; Figure 5 It shows Figure 3 A schematic diagram of the tray structure in the image; Figure 6 It shows Figure 3 A schematic diagram of the pallet lifting process; In the diagram: 1. Low-temperature fluid channel; 2. Organic working fluid storage tank; 3. Organic working fluid pump; 4. Organic working fluid evaporator; 5. Piston expander power unit; 6. Heat dissipation device; 61. Chassis; 611. Positioning slide; 62. Tray; 621. Through hole; 63. Heat dissipation coil; 64. Push rod; 65. Rocker arm; 66. Connecting rod; 67. Inlet hose; 68. Outlet hose; 69. Guide column. Detailed Implementation

[0018] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0019] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] refer to Figures 1 to 6This application provides a heat dissipation system driven by a low-temperature heat source, including a low-temperature fluid channel 1, an organic working fluid storage tank 2, an organic working fluid pump 3, an organic working fluid evaporator 4, a piston expander power unit 5, and a heat dissipation device 6. The low-temperature fluid channel 1 is used to transport the low-temperature heat source fluid. The organic working fluid storage tank 2 is used to store the organic working fluid. The organic working fluid pump 3 is connected to the organic working fluid storage tank 2 and is used to pump the organic working fluid. The organic working fluid evaporator 4 is connected to the low-temperature fluid channel 1 and the organic working fluid pump 3, and is used to transfer the heat from the low-temperature heat source to the organic working fluid, causing it to evaporate. The piston expander power unit 5 is connected to the organic working fluid evaporator 4 and is used to absorb the heat from the organic working fluid and convert it into mechanical power. The heat dissipation device 6 is connected to the piston expander power unit 5 and receives its output mechanical power for vibration-based heat dissipation. By using the heat from a low-temperature heat source to drive the circulation of an organic working fluid, and employing a piston expander to directly convert the working fluid's thermal energy into mechanical energy to drive the heat dissipation device 6, direct and efficient utilization of low-temperature waste heat can be achieved without converting it into electrical energy or high-speed rotational motion. This avoids efficiency losses and system complexity caused by energy conversion, and the vibration enhances the convective heat exchange coefficient between the radiator and the air, improving the heat exchange effect and reducing the power consumption of the fan or the consumption of cooling water during system cooling. This significantly improves the economy and practicality of low-temperature heat source recovery. In this embodiment, there are two piston expander power units 5 and two heat dissipation devices 6, connected in parallel.

[0024] In some embodiments, the organic working fluid is a working fluid suitable for evaporation from a low-temperature heat source, selected from at least one of R245fa, R134a, R1234ze, or carbon dioxide. In this embodiment, R245fa is preferred as the organic working fluid.

[0025] In some embodiments, the organic working fluid pump 3 is a variable frequency pump. By setting the organic working fluid pump 3 as a variable frequency pump, it can adjust the working fluid flow rate according to the heat load to ensure heat dissipation effect.

[0026] In some embodiments, the piston expander power unit 5 adopts a multi-cylinder parallel output configuration. By employing a multi-cylinder parallel output configuration, the total output power and torque of the system can be increased, thereby enabling more reliable driving of the vibration radiator. Simultaneously, it avoids the output instability or insufficient power problems that may occur with single-cylinder expanders, helping to improve the system's adaptability to low-temperature heat source fluctuations and different heat dissipation conditions. In this embodiment, the piston expander power unit 5 adopts a four-cylinder parallel output configuration; that is, the piston expander power unit 5 includes four piston expanders, and the output ends of the four piston expanders are connected to the same output shaft.

[0027] In some embodiments, the piston expander power unit 5 employs a flexible piston expander. By using a flexible piston expander, internal leakage and frictional losses can be effectively reduced, the conversion efficiency of the piston expander for low-temperature, low-grade heat sources can be improved, and mechanical wear caused by working fluid phase changes and pressure fluctuations can be reduced, thereby enhancing the reliability and service life of the system.

[0028] refer to Figure 3 and Figure 4 In some embodiments, the heat dissipation device 6 includes a chassis 61, a tray 62, a heat dissipation coil 63, a push rod 64, and a connecting assembly. The chassis 61 is provided with a positioning groove 611. The tray 62 is vertically detachable from the chassis 61. The heat dissipation coil 63 is disposed on the tray 62, enabling vibration heat dissipation when the tray 62 is raised or lowered. The push rod 64 passes through the positioning groove 611 and is connected to the tray 62, allowing it to reciprocate axially within the positioning groove 611 to raise or lower the tray 62. The connecting assembly connects the push rod 64 to the output shaft of the piston expander power unit 5, allowing it to rotate around the output shaft and reciprocate axially. In this embodiment, the connecting assembly includes a rocker arm 65 and a connecting rod 66. One end of the rocker arm 65 is connected to the output shaft of the piston expander power unit 5 and can rotate with the output shaft. One end of the connecting rod 66 is rotatably connected to the rocker arm 65, and the other end is rotatably connected to the push rod 64. During use, the output shaft of the piston expander power unit 5 can drive the rocker arm 65 to rotate. When the rocker arm 65 rotates, it can drive the push rod 64 to move axially back and forth in the positioning slide groove 611. When the positioning slide groove 611 moves, it can drive the tray 62 to rise and fall cyclically (e.g., Figure 6 As shown in the diagram, vibration cooling is achieved. It should be noted that... In some embodiments, the heat dissipation coil 63 has an overall hyperbolic spiral shape. By setting the heat dissipation coil 63 as a hyperbolic spiral shape, natural convection heat transfer can be achieved by utilizing the suction effect of the hyperbolic spiral shape itself, thus making it suitable for operating conditions where the heat dissipation tube stops vibrating.

[0029] refer to Figure 3 In some embodiments, the heat dissipation device 6 further includes an inlet hose 67 and an outlet hose 68, which are connected to the inlet and outlet ends of the heat dissipation coil 63, respectively, and can deform to fit the heat dissipation coil 63 when it vibrates. In this embodiment, both the inlet hose 67 and the outlet hose 68 are spiral hoses (such as rubber hoses), which can extend and retract with the heat dissipation coil 63 when it vibrates to avoid loosening of the joints.

[0030] refer to Figure 3In some embodiments, the heat dissipation device 6 further includes guide posts 69, which are disposed on the chassis 61 and slide in engagement with the tray 62, thereby guiding the tray 62. By providing guide posts 69 that slide in engagement with the tray 62, precise and stable linear constraints are provided for the tray 62 during lifting and vibration, preventing lateral displacement or rotation. This not only ensures that the heat dissipation coil 63 can vibrate regularly and efficiently according to the designed trajectory to enhance heat dissipation, but also greatly reduces the off-center wear of the connecting components, improving the reliability and durability of the entire vibrating heat sink structure. In this embodiment, there are four guide posts 69, which are fixed at the four corners of the chassis 61 and respectively engage with through holes 621 that penetrate the thickness of the tray 62 (e.g., ...). Figure 5 (As shown) to achieve a sliding fit.

[0031] The heat dissipation system driven by the low-temperature heat source in this application embodiment drives the circulation of organic working fluid by the heat from the low-temperature heat source, and uses a piston expander to directly convert the thermal energy of the working fluid into mechanical energy to drive the heat dissipation device 6. This achieves direct and efficient utilization of low-temperature waste heat without converting it into electrical energy or high-speed rotation. It avoids efficiency loss and system complexity caused by energy form conversion, and uses vibration to enhance the heat dissipation process, thereby significantly improving the economy and practicality of low-temperature heat source recovery.

[0032] One or more embodiments in this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this specification should be included within the protection scope of this application.

[0033] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heat dissipation system driven by a low-temperature heat source, characterized in that, include: Cryogenic fluid channel, used to transport cryogenic heat source fluid; Organic working fluid storage tanks are used to store organic working fluids. An organic working fluid pump, connected to the organic working fluid storage tank, is used to pump organic working fluid; An organic working fluid evaporator, connected to the low-temperature fluid channel and the organic working fluid pump, is used to transfer heat from the low-temperature heat source to the organic working fluid, causing it to evaporate; The piston expander power unit is connected to the organic working fluid evaporator and is used to absorb the heat of the organic working fluid and convert it into mechanical power. A heat dissipation device is connected to the power unit of the piston expander and receives the mechanical power output by it for vibration heat dissipation.

2. The heat dissipation system driven by a low-temperature heat source according to claim 1, characterized in that, The organic working fluid pump is a variable frequency pump.

3. The heat dissipation system driven by a low-temperature heat source according to claim 1, characterized in that, The piston expander power unit adopts a multi-cylinder parallel output form.

4. The heat dissipation system driven by a low-temperature heat source according to claim 1, characterized in that, The piston expander power unit adopts a flexible piston expander.

5. The heat dissipation system driven by a low-temperature heat source according to claim 1, characterized in that, The heat dissipation device includes: The chassis is equipped with positioning grooves; The tray is adjustable and mounted on the chassis. A heat dissipation coil is installed on the tray, which can achieve vibration heat dissipation when the tray is raised and lowered; A push rod passes through the positioning groove and is connected to the tray, and can move axially back and forth in the positioning groove to drive the tray to rise and fall; A connecting assembly connects the push rod to the output shaft of the piston expander power unit, and is capable of rotating around the output shaft of the piston expander power unit and driving the push rod to reciprocate axially.

6. The heat dissipation system driven by a low-temperature heat source according to claim 5, characterized in that, The overall shape of the heat dissipation coil is a hyperbola spiral.

7. The heat dissipation system driven by a low-temperature heat source according to claim 5, characterized in that, The connecting assembly includes a rocker arm and a connecting rod. One end of the rocker arm is connected to the output shaft of the piston expander power unit and can rotate with the output shaft. One end of the connecting rod is rotatably connected to the rocker arm, and the other end is rotatably connected to the push rod.

8. The heat dissipation system driven by a low-temperature heat source according to claim 5, characterized in that, The heat dissipation device also includes: The inlet hose and outlet hose are connected to the inlet and outlet ends of the heat dissipation coil, respectively, and can deform to fit the heat dissipation coil when it vibrates.

9. The heat dissipation system driven by a low-temperature heat source according to claim 5, characterized in that, The heat dissipation device also includes: The guide post is disposed on the chassis and slides in cooperation with the pallet to guide the pallet.

Images