Heat reservoir of heat storage type heat pump air conditioning unit and preparation method for heat storage material thereof

A technology for heat pump air conditioners and heat storage materials, which is applied in heat pumps, heat storage equipment, indirect heat exchangers, etc., can solve the problems of poor heat transfer performance, flammability, leakage, etc. The effect of high thermal conductivity and high heat transfer efficiency

Active Publication Date: 2006-03-29
武汉长盈通热控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of the heat storage of this structure is the poor heat transfer performance of the heat storage due to the low thermal conductivity of paraffin
In addition, paraffin is a solid-liquid phase change heat storage material, which has the problem of liquid leakage when the phase change occurs, and it also has the problem of flammability

Method used

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  • Heat reservoir of heat storage type heat pump air conditioning unit and preparation method for heat storage material thereof
  • Heat reservoir of heat storage type heat pump air conditioning unit and preparation method for heat storage material thereof
  • Heat reservoir of heat storage type heat pump air conditioning unit and preparation method for heat storage material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Paraffin C 20 h 42 It is a phase change material with a phase change temperature of 40°C, a phase change latent heat of 186kJ / kg, and a thermal conductivity of 0.24W / m.K.

[0020] The acidified graphite is expanded in a muffle furnace at a temperature of 800° C. for 20 seconds to prepare expanded graphite. 3g of the above phase change heat storage material and 7g of expanded graphite were placed in a 60°C oven for blending and adsorption for 1 hour, then filtered and dried to prepare a paraffin / graphite composite phase change heat storage material. The phase change temperature of the paraffin / graphite composite phase change heat storage material is 45°C, the latent heat of phase change is 56kJ / kg, the thermal conductivity is 4.32W / m.K, and the weight percent Wt% of its paraffin is 30%.

[0021] The smooth copper tube of φ8×1mm is processed into a petal-shaped finned tube, and it is coiled into a spiral coil heat exchanger structure with petal-shaped fins on the outer ...

Embodiment 2

[0023] Paraffin C 23 h 48 It is a phase change material with a phase change temperature of 45°C, a phase change latent heat of 192kJ / kg, and a thermal conductivity of 0.24W / m.K.

[0024] The acidified graphite is expanded in a muffle furnace at a temperature of 900° C. for 30 seconds to prepare expanded graphite. 6g of the above-mentioned phase-change heat storage material and 4g of expanded graphite were placed in an oven at 60°C for 2 hours of blending and adsorption, then filtered and dried to prepare a paraffin / graphite composite phase-change heat storage material. The phase change temperature of the paraffin / graphite composite phase change heat storage material is 45°C, the latent heat of phase change is 115kJ / kg, the thermal conductivity is 2.14W / m.K, and the weight percentage Wt% of its paraffin is 60%.

[0025] The smooth copper tube of φ8×1mm is processed into a petal-shaped finned tube, and it is coiled into a spiral coil heat exchanger structure with petal-shaped ...

Embodiment 3

[0027] Paraffin C 25 h 52 It is a phase change material with a phase change temperature of 50°C, a phase change latent heat of 200kJ / kg, and a thermal conductivity of 0.24W / m.K.

[0028] The acidified graphite is expanded in a muffle furnace at a temperature of 1000° C. for 40 seconds to prepare expanded graphite. 9g of the above-mentioned phase-change heat storage material and 1g of expanded graphite were placed in a 60°C oven for 3.5 hours, blended and adsorbed, then filtered and dried to prepare a paraffin / graphite composite phase-change heat storage material. The phase change temperature of the paraffin / graphite composite phase change heat storage material is 45°C, the latent heat of phase change is 180kJ / kg, the thermal conductivity is 1.02W / m.K, and the weight percentage Wt% of its paraffin is 90%.

[0029] The smooth copper tube of φ8×1mm is processed into a petal-shaped finned tube, and the outer surface is a spiral coil heat exchanger with a petal-shaped fin with an...

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Abstract

The invention is a kind of heat reservoir of heat storage pump air conditioner device, which is made up of bleak lead and olefin compound phase change heat storage material, a spiral plate pipe heat exchanger whose surface has petal fins and cylinder container. The spiral plate heat exchanger is set in the cylinder container, the black lead and the olefin compound phase change material are filled in the container space out of the spiral plate heat exchanger, the cooling media flows in the pipes of the exchanger, and carries on heat exchanging with compound phase change heat storage material through the pipe walls and the fins, it realizes the storage and the release of the heat quantity. The black lead and the olefin compound phase change heat storage material are the standard phase change material; it maintains solid state when carrying on phase change, it has no liquid leakage problem. The heat conducting efficiency is high.

Description

technical field [0001] The invention belongs to the field of heat pump air conditioning systems, and more specifically relates to a heat storage device of a heat storage heat pump air conditioning device and a method for preparing the heat storage material thereof. Background technique [0002] Heat pump air conditioning systems are popular because they can cool in summer and heat in winter. The heat pump air conditioning system is mainly composed of evaporator, condenser, compressor, expansion valve, four-way valve and some connecting pipes and control components. In summer, the indoor unit is an evaporator, and the outdoor unit is a condenser; when it is operated in winter, the indoor unit is a condenser, and the outdoor unit is an evaporator. However, due to changes in winter weather, outdoor temperature fluctuations are relatively large, which has a great impact on the performance of heat pump units, especially air-cooled heat pump units. Espec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B30/02F28D20/02
CPCY02E60/145Y02E60/14
Inventor 张正国方晓明王世平
Owner 武汉长盈通热控技术有限公司
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