Thermoplastic resin phase change material box body heat exchange equipment

Abstract

The invention discloses thermoplastic resin phase change material box heat exchange equipment, belongs to the field of heat exchangers, and solves the problems of low energy storage capacity, low temperature stability of cold and hot fluids and low heating heat flux density of the cold and hot fluids in the prior art. The heat exchange box body is filled with a self-packaging phase change energy storage material; the two ends of the fluid channel penetrate through the side wall of the heat exchange box body and form a pipe opening, and the middle of the fluid channel penetrates through the self-packaging phase change energy storage material; the self-packaging phase-change energy storage material comprises a phase-change energy storage material and thermoplastic resin, and the self-packaging phase-change energy storage material is formed by embedding the phase-change energy storage material as a dispersed phase in a continuous phase of the thermoplastic resin. The thermoplastic resin phase change material box body heat exchange equipment is large in unit volume phase change latent heat storage amount, can stabilize the cold / hot fluid temperature and buffer the heating heat flux density, and has high practical value.

Description

Technical Field

[0001] The invention relates to a thermoplastic resin phase change material box heat exchange equipment, belonging to the field of heat exchangers. Background Art

[0002] Energy storage technology is a technology that absorbs heat through energy storage materials when there is too much heat, and releases energy when there is a demand for heat supply. This technology has the characteristics of storing heat and releasing the stored heat at the same time. It can be widely used in ground source heat pump systems and air source heat pump systems. It can effectively reduce the thermal energy consumption of buildings and industries. It is an ideal environmentally friendly energy supply equipment.

[0003] In existing energy storage heat exchange equipment, the energy storage capacity of energy storage materials is low, and the amount of energy storage is greatly affected. When the temperature difference between the hot and cold fluids flowing through the energy storage heat exchanger is large, the temperature stability of the hot and cold fluids is low. When the energy storage heat exchanger is used in scenarios with high requirements for hot and cold output stability, it is difficult to meet the use requirements. In addition, the existing energy storage heat exchange equipment has a low stability in heat energy transfer, which affects the stability of the heating heat flux density of the hot and cold fluids, causing fluctuations. Summary of the invention

[0004] The invention provides a thermoplastic resin phase change material box heat exchange equipment, which has a large unit volume phase change latent heat storage capacity, can stabilize the temperature of cold / hot fluids and buffer the heating heat flux density, and has high practical value.

[0005] The technical solution adopted by the present invention is a thermoplastic resin phase change material box heat exchange device, comprising a heat exchange box (1), wherein the heat exchange box has a fluid channel;

[0006] The heat exchange box is filled with a self-encapsulated phase-change energy storage material; both ends of the fluid channel pass through the side wall of the heat exchange box to form a pipe opening, and the middle of the fluid channel passes through the self-encapsulated phase-change energy storage material;

[0007] The self-encapsulated phase-change energy storage material comprises a phase-change energy storage material and a thermoplastic resin. The self-encapsulated phase-change energy storage material is formed by embedding the phase-change energy storage material as a dispersed phase in a continuous phase of the thermoplastic resin.

[0008] Optimally, in the above-mentioned thermoplastic resin phase change material box heat exchange device, the fluid channel includes a first fluid channel and a second fluid channel;

[0009] The heat exchange box is provided with a plurality of stacked heat exchange plate groups; the heat exchange plate groups include a first plate, a second plate, a third plate, and a fourth plate;

[0010] A first fluid channel is formed between the first plate and the second plate; a second fluid channel is formed between the third plate and the fourth plate; an energy storage material chamber is formed between the second plate and the third plate, and a self-encapsulated phase change energy storage material is formed in the energy storage material chamber.

[0011] Optimally, in the above-mentioned thermoplastic resin phase change material box heat exchange device, the flow direction of the fluid in the first fluid channel is the same as or opposite to the flow direction of the fluid in the second fluid channel;

[0012] The first fluid channels of all the heat exchange fin groups are connected to form a heat flow channel, and both ends of the heat flow channel pass through the side wall of the heat exchange box to form a heat flow pipe opening;

[0013] The second fluid channels of all the heat exchange plate groups are connected to form a cold flow channel, and both ends of the cold flow channel pass through the side wall of the heat exchange box body to form a cold flow pipe opening.

[0014] Optimized, in the above-mentioned thermoplastic resin phase change material box heat exchange equipment, the self-encapsulated phase change energy storage material also includes a granular porous material; the self-encapsulated phase change energy storage material is formed by the phase change energy storage material and the granular porous material as a dispersed phase embedded in the continuous phase of the thermoplastic resin;

[0015] Thermoplastic resin that fills the gaps in phase change energy storage materials and granular porous materials with a continuous phase.

[0016] Optimized, the above thermoplastic resin phase change material box heat exchange equipment, the phase change energy storage material is CaC l2 6H 2 O、NaSO 4 10H 2 O, NaCO 3 10H 2 O、Na 2 HPO 4 12H 2 O、Na 2 S 2 O 3 ·5H 2 O、Na(CH 3 COO)·3H 2 A type of O.

[0017] Optimally, in the above-mentioned thermoplastic resin phase change material box heat exchange equipment, the granular porous material is a mixture of one or more of activated carbon, expanded perlite, expanded graphite, expanded vermiculite or expanded vitrified microspheres.

[0018] Optimally, the thermoplastic resin of the above-mentioned thermoplastic resin phase change material box heat exchange equipment is low-density polyethylene, high-density polyethylene, polyvinyl chloride, polypropylene, polyolefin thermoplastic elastomer, ethylene-vinyl acetate copolymer, polyphenylene sulfide or PC plastic. Optimally, the above-mentioned thermoplastic resin phase change material box heat exchange equipment has an insulation layer wrapped outside the heat exchange box.

[0019] Optimized, the above-mentioned thermoplastic resin phase change material box heat exchange equipment, the self-encapsulated phase change energy storage material and the second plate and the third plate are in seamless contact;

[0020] The self-encapsulated phase-change energy storage material presents a high-viscosity mass-like plastic fluid after being heated, and enters between the second plate and the third plate by extrusion or injection.

[0021] The advantages of this application are: in the technical solution of this application, self-encapsulated phase change energy storage material is used as energy storage material, and the hot fluid in the hot fluid channel heats the cold fluid in the cold fluid channel through the interlayer of the energy storage material chamber. At a certain heat source temperature, when the heating load of the hot fluid is greater than the heating load required by the cold fluid, the heat exchange temperature difference becomes smaller; when the heating load of the hot fluid is less than the heating load required by the cold fluid, the heat exchange temperature difference becomes larger. It can effectively stabilize the temperature of cold / hot fluids and buffer the heating heat flux density. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of this application;

[0023] Figure 2 This is a schematic diagram of the internal structure of the heat exchanger group of the present application;

[0024] Figure 3 A schematic diagram of the self-encapsulated phase change energy storage material of the present application;

[0025] Figure 4 This is a schematic diagram of the combination of the phase change energy storage material and the granular porous material in this application. DETAILED DESCRIPTION

[0026] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] As shown in the figure, the present invention is a thermoplastic resin phase change material box heat exchange equipment, including a heat exchange box 1, and the outside of the heat exchange box 1 is wrapped with a thermal insulation layer.

[0028] The heat exchange box 1 has a fluid channel filled with a self-encapsulated phase-change energy storage material 3, the two ends of the fluid channel pass through the side wall of the heat exchange box 1 to form a pipe opening, and the middle of the fluid channel passes through the self-encapsulated phase-change energy storage material 3.

[0029] The fluid channel includes a first fluid channel 201 and a second fluid channel 202. The heat exchange box 1 has a plurality of stacked heat exchange plate groups 2. The heat exchange plate group 2 includes a first plate 203, a second plate 204, a third plate 205, and a fourth plate 206. A first fluid channel 201 is formed between the first plate 203 and the second plate 204. A second fluid channel 202 is formed between the third plate 205 and the fourth plate (206). The first fluid channels 201 of all heat exchange plate groups 2 are connected to form a hot flow channel, and both ends of the hot flow channel pass through the side wall of the heat exchange box 1 and form a hot flow pipe mouth. The second fluid channels 202 of all heat exchange plate groups 2 are connected to form a cold flow channel, and both ends of the cold flow channel pass through the side wall of the heat exchange box 1 and form a cold flow pipe mouth. The flow direction of the fluid in the first fluid channel 201 can be the same as or opposite to the flow direction of the fluid in the second fluid channel 202, and is adjusted according to the heat exchange energy storage requirements.

[0030] An energy storage material chamber is formed between the second plate 204 and the third plate 205 , and a self-encapsulated phase-change energy storage material 3 is formed in the energy storage material chamber.

[0031] The self-encapsulated phase change energy storage material 3 is a micro-encapsulated polymer with a core-shell structure, with a porous particle-based phase change energy storage material as the core material, a shell wrapped around the core, or the core is directly embedded in a uniform or non-uniform encapsulation material matrix. The shell material acts as a container-like function to prevent the phase change material from contacting the external environment.

[0032] The porous particle-based phase change energy storage material uses a particle-type porous material as a supporting material, and vacuum adsorbs the phase change material into the pores of the particle-type porous material. The phase change energy storage material and the thermoplastic resin are kneaded together through a certain technology to form a thermoplastic resin self-encapsulated fixed inorganic phase change energy storage material. The porous particle-based phase change energy storage material particles are embedded in the thermoplastic resin continuous phase as dispersed phase islands, that is, the porous particle-based phase change energy storage material particles are filled with a continuous phase of thermoplastic resin to form a self-encapsulated structure. During the phase change process, regardless of whether the phase change material is in a solid state or a liquid state, the appearance and shape are solid.

[0033] The self-encapsulated phase-change energy storage material 3 of the present application comprises a phase-change energy storage material 301, a thermoplastic resin 302 and a granular porous material 303. The self-encapsulated phase-change energy storage material 3 is formed by embedding the phase-change energy storage material 301 and the granular porous material 303 as dispersed phases in the continuous phase of the thermoplastic resin 302. The gaps between the phase-change energy storage material 301 and the granular porous material 303 are filled with the continuous phase of the thermoplastic resin 302.

[0034] Phase change energy storage material 301 is CaC l2 6H 2 O、NaSO 410H 2 O, NaCO 3 10H 2 O、Na 2 HPO 4 12H 2 O、Na 2 S 2 O 3 ·5H 2 O、Na(CH 3 COO)·3H 2 A type of O.

[0035] The granular porous material 303 is one or a mixture of multiple of activated carbon, expanded perlite, expanded graphite, expanded vermiculite or expanded vitrified microspheres.

[0036] The thermoplastic resin is low-density polyethylene, high-density polyethylene, polyvinyl chloride, polypropylene, polyolefin thermoplastic elastomer, ethylene-vinyl acetate copolymer, polyphenylene sulfide or PC plastic. In this embodiment, the mass proportion of the phase change energy storage material 301 is 65-70%, the mass proportion of the granular porous material 303 is 9-11%, and the mass proportion of the thermoplastic resin is 20-25%. The self-encapsulated phase change energy storage material 3 is in seamless contact with the second plate 204 and the third plate 205. The self-encapsulated phase change energy storage material 3 presents a highly viscous mass-like plastic fluid at the processing temperature, and can be made into finished products of various shapes such as particles, balls, plates, blocks, etc. through extrusion and injection processes.

[0037] The self-encapsulated phase-change energy storage material 3 of the present application can be formed in the energy storage material chamber in the following manner.

[0038] Step 1: Heat and stir the phase change energy storage material in a reaction tank until it is completely melted.

[0039] Step 2: Add the granular porous material 303 into the kneader, start the kneader, stir at a speed of 100 rpm and gradually increase the temperature to 150° C.

[0040] The internal pressure of the kneader is reduced to -0.09 to -0.095 MPa, and the phase change energy storage material is put into the kneader and stirred for 10 min to 20 min until the phase change energy storage material is adsorbed by the granular porous material 303 to form porous granular-based phase change energy storage material particles.

[0041] Step 3: After the thermoplastic resin 302 is processed into a molten viscous state in a single-screw extruder, it is introduced into a kneader. During the feeding process of the thermoplastic resin, the kneader keeps stirring.

[0042] Step 4: Continue to raise the temperature in the kneading machine to the processing temperature, and continue stirring at a speed of 100 r / min for 10-20 minutes to fully knead the porous particle-based phase change energy storage material particles and the thermoplastic resin 302 to form a highly viscous mass mixture.

[0043] Step 5: The highly viscous mass mixture is introduced into a twin-screw forced feeder for mixing, and then injected under pressure into the energy storage material chamber for natural cooling and shaping.

[0044] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A thermoplastic resin phase change material box heat exchange device, comprising a heat exchange box (1), wherein the heat exchange box (1) has a fluid channel, and is characterized in that: The heat exchange box (1) is filled with a self-encapsulated phase-change energy storage material (3); both ends of the fluid channel pass through the side wall of the heat exchange box (1) to form a pipe opening, and the middle of the fluid channel passes through the self-encapsulated phase-change energy storage material (3); The self-encapsulated phase-change energy storage material (3) comprises a phase-change energy storage material (301) and a thermoplastic resin (302). The self-encapsulated phase-change energy storage material (3) is formed by embedding the phase-change energy storage material (301) as a dispersed phase in a continuous phase of the thermoplastic resin (302).

2. The thermoplastic resin phase change material box heat exchange equipment according to claim 1, characterized in that: The fluid channel comprises a first fluid channel (201) and a second fluid channel (202); A plurality of stacked heat exchange plate groups (2) are provided in the heat exchange box (1); the heat exchange plate group (2) comprises a first plate (203), a second plate (204), a third plate (205), and a fourth plate (206); A first fluid channel (201) is formed between the first plate (203) and the second plate (204); a second fluid channel (202) is formed between the third plate (205) and the fourth plate (206); an energy storage material chamber is formed between the second plate (204) and the third plate (205), and a self-encapsulated phase change energy storage material (3) is formed in the energy storage material chamber.

3. The thermoplastic resin phase change material box heat exchange equipment according to claim 2, characterized in that: The flow direction of the fluid in the first fluid channel (201) is the same as or opposite to the flow direction of the fluid in the second fluid channel (202); The first fluid channels (201) of all the heat exchange fin groups (2) are connected to form a heat flow channel, and both ends of the heat flow channel pass through the side wall of the heat exchange box (1) to form a heat flow pipe opening; The second fluid channels (202) of all the heat exchange plate groups (2) are connected to form a cold flow channel, and both ends of the cold flow channel pass through the side wall of the heat exchange box (1) to form a cold flow pipe opening.

4. The thermoplastic resin phase change material box heat exchange equipment according to claim 1, characterized in that: The self-encapsulated phase-change energy storage material (3) further comprises a granular porous material (303); the self-encapsulated phase-change energy storage material (3) is formed by embedding the phase-change energy storage material (301) and the granular porous material (303) as dispersed phases in the continuous phase of the thermoplastic resin (302); The gaps between the phase-change energy storage material (301) and the particle-type porous material (303) are filled with a continuous phase thermoplastic resin (302).

5. The thermoplastic resin phase change material box heat exchange equipment according to claim 1, characterized in that: The phase change energy storage material (301) is CaC l2 ·6H2O, NaSO4·10H2O, NaCO3·10H2O, Na2HPO4·12H2O, Na2S2O3·5H2O, Na(CH3COO)·3H2O.

6. The thermoplastic resin phase change material box heat exchange equipment according to claim 4, characterized in that: The granular porous material (303) is one or a mixture of multiple of activated carbon, expanded perlite, expanded graphite, expanded vermiculite or expanded vitrified microspheres.

7. The thermoplastic resin phase change material box heat exchange equipment according to claim 1, characterized in that: The thermoplastic resin is low-density polyethylene, high-density polyethylene, polyvinyl chloride, polypropylene, polyolefin thermoplastic elastomer, ethylene-vinyl acetate copolymer, polyphenylene sulfide or PC plastic.

8. The thermoplastic resin phase change material box heat exchange equipment according to claim 1, characterized in that: The outside of the heat exchange box (1) is wrapped with a thermal insulation layer.

9. The thermoplastic resin phase change material box heat exchange equipment according to claim 2, characterized in that: The self-encapsulated phase-change energy storage material (3) is in seamless contact with the second plate (204) and the third plate (205); The self-encapsulated phase-change energy storage material (3) presents a highly viscous mass-like plastic fluid after being heated, and enters between the second plate (204) and the third plate (205) by extrusion or injection.

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