Heat storage device suitable for heat pump system and operation method

Abstract

The invention provides a heat storage device suitable for a heat pump system and an operation method. The heat storage device is composed of micro heat pipe arrays, porous flat aluminum channels, flat straight fins, flat water pipes and phase change materials. Flat water pipes are attached to the two sides of an evaporation section of the micro heat pipe array, porous flat aluminum channels are attached to the two sides of a condensation section of the micro heat pipe array, then the porous flat aluminum channels are attached to flat straight fins, the flat straight fins make direct contact with the phase change material, and then a heat storage component of the heat storage device is formed. According to the heat storage device, the micro heat pipe and the heat exchanger serve as core components, the phase change material is combined, the heat absorption rate of the heat storage device can be effectively increased, the heat exchange amount is increased, the comprehensive performance of a heat pump system is improved, and better economic benefits are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical fields of energy storage and heat pump, and particularly relates to a heat storage device applicable to a heat pump system and an operation method thereof. Background Art

[0002] Heat storage and energy storage is an energy storage technology, the principle of which is to store heat energy and release it in the form of heat energy or other energy forms when needed. It has great potential in improving energy utilization efficiency and energy conservation, and has great application value. The heat storage technology will play a more important role in the energy field. However, there are a series of problems in the heat storage devices of traditional heat pump systems, such as low utilization efficiency and serious energy loss. Therefore, improving the energy utilization efficiency of the heat storage device and thus the overall performance of the heat pump system is an important problem currently faced. Summary of the Invention

[0003] To overcome the deficiencies of the above-mentioned prior art, the present invention provides a heat storage device applicable to a heat pump system and an operation method thereof. The heat storage device takes a heat exchanger with micro heat pipes as the core component and combines with a phase change material. This device can effectively improve the heat absorption rate of the heat storage device, increase the heat transfer amount, improve the overall performance of the heat pump system, and has better economic benefits.

[0004] To achieve the above technical features, the object of the present invention is realized as follows: A heat storage device applicable to a heat pump system, the heat storage device is composed of a micro heat pipe array, a porous flat aluminum channel, flat plate straight fins, flat water pipes, and a phase change material; the evaporation sections of the micro heat pipe array are attached to both sides of the flat water pipes, the condensation sections of the micro heat pipe array are attached to both sides of the porous flat aluminum channel, the porous flat aluminum channel is then attached to the flat plate straight fins, and the flat plate straight fins are in direct contact with the phase change material, thereby forming the heat storage component of the heat storage device.

[0005] Preferably, the micro heat pipe array consists of two parts: an evaporation section and a condensation section; R141b with a filling ratio of 20% is introduced into the microchannels of the micro heat pipe array as the working fluid.

[0006] Preferably, the porous flat aluminum channel is formed by extruding multiple holes made of aluminum alloy in parallel, and multiple capillary microgroove structures are arranged in the holes to enhance heat transfer; a refrigerant is introduced into the porous flat aluminum channel as a refrigerant channel.

[0007] Preferably, when the heat pump system operates in the heat storage mode, the heat of the hot water in the flat water pipes is stored in the phase change material through the micro heat pipe array and the flat plate straight fins in sequence to achieve heat storage.

[0008] Preferably, when the heat pump system operates in the heat release mode, the heat stored in the phase change material is sequentially exchanged with the refrigerant through the flat straight fin and the porous flat aluminum channel, and the refrigerant that obtains the heat will enter the system through the refrigerant pipeline to release heat.

[0009] Preferably, the entire heat storage device is arranged inside a stainless steel box body and filled with the phase change material.

[0010] Preferably, a refrigerant inlet channel and a refrigerant outlet channel are respectively arranged at both ends of the porous flat aluminum channel.

[0011] On the other hand, the present invention provides an operation method for a heat storage device applicable to a heat pump system, including: When the heat pump system operates in the heat storage mode, the evaporation section of the micro heat pipe array transfers the heat of the hot water in the flat water pipe to the condensation section of the micro heat pipe array, and the heat is sequentially transferred from the condensation section to the flat straight fin and the phase change material, and finally the heat is stored in the phase change material to achieve heat storage; When the heat pump system operates in the heat release mode, the heat stored in the phase change material is sequentially exchanged with the refrigerant through the flat straight fin and the porous flat aluminum channel, and the refrigerant absorbs heat and evaporates into superheated steam, and flows out through the refrigerant outlet channel.

[0012] The present invention has the following beneficial effects: 1. In the heat storage device of the present invention, the micro heat pipe type heat exchanger is used as the core component, and its components adopt the form of combination of a micro heat pipe array, a porous flat aluminum channel and a flat fin. The micro heat pipe heat exchanger has a large heat transfer coefficient, can meet the current high energy efficiency standard, and has excellent pressure resistance performance, which can effectively improve the heat exchange efficiency of the heat storage device.

[0013] 2. On the basis of the micro heat pipe type heat exchanger, the present invention is combined with the phase change material to realize rapid heat transfer, improve the heat absorption efficiency of the refrigerant pipe, reduce the energy consumption of the evaporator, and improve the economy and operation efficiency of the heat storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 It is a heat storage device diagram of the heat pump system of the present invention.

[0016] Figure 2 It is a side view of the heat storage device of the heat pump system.

[0017] Figure 3 It is a diagram of the porous flat aluminum channel.

[0018] In the figure: 1 micro heat pipe array, 2 evaporation section, 3 condensation section, 4 porous flat tube aluminum channel, 5 flat plate straight fin, 6 flat water pipe, 7 phase change material, 8 refrigerant inlet channel; 9 refrigerant outlet channel; 10 stainless steel box. Specific embodiments

[0019] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0020] Example 1: Referring to Figures 1-3 , a heat storage device applicable to a heat pump system, the heat storage device is composed of a micro heat pipe array 1, a porous flat aluminum channel 4, a flat plate straight fin 5, a flat water pipe 6 and a phase change material 7; the flat water pipes 6 are attached to both sides of the evaporation section 2 of the micro heat pipe array 1, the porous flat aluminum channels 4 are attached to both sides of the condensation section 3 of the micro heat pipe array 1, the porous flat aluminum channels 4 are then attached to the flat plate straight fins 5, and the flat plate straight fins 5 are in direct contact with the phase change material 7, thereby forming a heat storage component of the heat storage device. Through the above heat storage device with a micro heat pipe heat exchanger as the core component, its components adopt the form of a combination of a micro heat pipe array, a porous flat aluminum channel and a flat plate fin. The micro heat pipe heat exchanger has a large heat transfer coefficient, can meet the current high energy efficiency standard, and has excellent pressure resistance performance, which can effectively improve the heat exchange efficiency of the heat storage device.

[0021] Furthermore, the micro heat pipe array 1 is composed of two parts: an evaporation section 2 and a condensation section 3; R141b with a filling ratio of 20% is introduced into the microchannels of the micro heat pipe array 1 as the working medium. By using the above R141b as the working medium, it is convenient to achieve subsequent rapid heat transfer, improve the heat absorption efficiency of the refrigerant pipe, reduce the energy consumption of the evaporator, and improve the economy and operation efficiency of the heat storage device.

[0022] Furthermore, the porous flat aluminum channel 4 is formed by extruding a plurality of holes made of aluminum alloy in parallel, and a plurality of capillary microgroove structures are arranged in the holes to enhance heat transfer; a refrigerant is introduced into the porous flat aluminum channel 4 as a refrigerant channel. Through the above porous flat aluminum channel 4, the heat transfer coefficient of the micro heat pipe array 1 can be effectively increased, thereby improving the heat exchange efficiency of the heat storage device.

[0023] Furthermore, when the heat pump system operates in the heat storage mode, the heat of the hot water in the flat water pipe 6 is stored in the phase change material 7 through the micro heat pipe array 1 and the flat plate straight fin 5 in sequence to achieve heat storage. Through the above operation method, the purpose of heat storage can be achieved.

[0024] Further, when the heat pump system operates in the heat release mode, the heat stored in the phase change material 7 is sequentially exchanged with the refrigerant through the flat plate fin 5 and the porous flat aluminum channel 4. The refrigerant that obtains the heat will enter the system through the refrigerant pipeline to achieve heat release. The purpose of heat release can be achieved through the above operation method.

[0025] Further, the entire heat storage device is arranged inside the stainless steel box 10 and filled with the phase change material 7. The above overall layout structure facilitates the mobile use of the entire heat storage device.

[0026] Further, a refrigerant inlet channel 8 and a refrigerant outlet channel 9 are respectively arranged at both ends of the porous flat aluminum channel 4. The injection and discharge of the refrigerant can be realized through the refrigerant inlet channel 8 and the refrigerant outlet channel 9.

[0027] Embodiment 2: On the other hand, the present invention provides an operation method for a heat storage device applicable to a heat pump system, including: When the heat pump system operates in the heat storage mode, the evaporation section 2 of the micro heat pipe array 1 transfers the heat of the hot water in the flat water pipe 6 to the condensation section 3 of the micro heat pipe array 1. The heat is sequentially transferred from the condensation section 3 to the flat plate fin 5 and the phase change material 7, and finally the heat is stored in the phase change material 7 to achieve heat storage; When the heat pump system operates in the heat release mode, the heat stored in the phase change material 7 is sequentially exchanged with the refrigerant through the flat plate fin 5 and the porous flat aluminum channel 4. After absorbing the heat, the refrigerant evaporates into superheated steam and flows out through the refrigerant outlet channel 9.

Claims

1. A heat storage device applicable to a heat pump system, characterized in that: The heat storage device is composed of a micro heat pipe array (1), a porous flat aluminum channel (4), flat plate straight fins (5), a flat water pipe (6), and a phase change material (7); on both sides of the evaporation section (2) of the micro heat pipe array (1), the flat water pipe (6) is attached, on both sides of the condensation section (3) of the micro heat pipe array (1), the porous flat aluminum channel (4) is attached, the porous flat aluminum channel (4) is then attached to the flat plate straight fins (5), and the flat plate straight fins (5) are in direct contact with the phase change material (7), thus forming the heat storage component of the heat storage device.

2. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: The micro heat pipe array (1) consists of two parts: an evaporation section (2) and a condensation section (3); R141b with a filling ratio of 20% is introduced into the microchannels of the micro heat pipe array (1) as the working fluid.

3. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: The porous flat aluminum channel (4) is formed by extruding multiple holes made of aluminum alloy in parallel, and multiple capillary microgroove structures are arranged in the holes to enhance heat transfer; a refrigerant is introduced into the porous flat aluminum channel (4) as a refrigerant channel.

4. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: When the heat pump system operates in the heat storage mode, the heat of the hot water in the flat water pipe (6) is sequentially transferred to the phase change material (7) through the micro heat pipe array (1) and the flat plate straight fins (5) to achieve heat storage.

5. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: When the heat pump system operates in the heat release mode, the heat stored in the phase change material (7) is sequentially exchanged with the refrigerant through the flat plate straight fins (5) and the porous flat aluminum channel (4), and the refrigerant that obtains the heat will enter the system through the refrigerant pipeline to achieve heat release.

6. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: The entire heat storage device is arranged inside a stainless steel box (10) and filled with the phase change material (7).

7. The heat storage device applicable to a heat pump system according to claim 1, characterized in that: A refrigerant inlet channel (8) and a refrigerant outlet channel (9) are respectively arranged at both ends of the porous flat aluminum channel (4).

8. The operation method of a heat storage device applicable to a heat pump system according to any one of claims 1-7, characterized in that: When the heat pump system operates in the heat storage mode, the evaporation section (2) of the micro heat pipe array (1) transfers the heat of the hot water in the flat water pipe (6) to the condensation section (3) of the micro heat pipe array (1), and the heat is sequentially transferred from the condensation section (3) to the flat plate straight fins (5) and the phase change material (7), and finally the heat is stored in the phase change material (7) to achieve heat storage; When the heat pump system operates in the heat release mode, the heat stored in the phase change material (7) is sequentially exchanged with the refrigerant through the flat plate straight fins (5) and the porous flat aluminum channel (4), and the refrigerant evaporates into superheated steam after absorbing the heat and flows out through the refrigerant outlet channel (9).

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