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, applied in heat pumps, heat storage equipment, indirect heat exchangers, etc. The effect of high heat transfer efficiency and high thermal conductivity

Active Publication Date: 2004-11-17
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, p

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

Example Embodiment

[0018] Example 1:

[0019] Use paraffin wax 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 placed in a muffle furnace at a temperature of 800° C. and expanded for 20 seconds to prepare expanded graphite. Put 3g of the above phase change heat storage material and 7g of expanded graphite in an oven at 60°C for blending and adsorption for 1 hour, then filter and dry to prepare a paraffin / graphite composite phase change heat storage material. The phase change temperature of the paraffin wax / graphite composite phase change heat storage material is 45° C., the phase change latent heat is 56 kJ / kg, the thermal conductivity is 4.32 W / m.K, and the weight percentage Wt% of the paraffin wax is 30%.

[0021] Use φ8×1mm smooth red copper tube to be processed into petal-shaped finned tube, coiled into a spiral coil heat exchanger structure with pe...

Example Embodiment

[0022] Example 2:

[0023] Use paraffin wax 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 placed in a muffle furnace at a temperature of 900° C. and expanded for 30 seconds to prepare expanded graphite. 6g of the above phase change heat storage material and 4g of expanded graphite are placed in an oven at 60°C for blending and adsorption for 2 hours, then filtered and dried to prepare a paraffin / graphite composite phase change heat storage material. The phase change temperature of the paraffin wax / graphite composite phase change heat storage material is 45° C., the phase change latent heat is 115 kJ / kg, the thermal conductivity is 2.14 W / m.K, and the weight percentage Wt% of the paraffin wax is 60%.

[0025] Use φ8×1mm smooth red copper tube to be processed into petal-shaped finned tube, coiled into a spiral coil heat exchanger stru...

Example Embodiment

[0026] Example 3:

[0027] Use paraffin wax 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 placed in a muffle furnace at a temperature of 1000° C. and expanded for 40 seconds to prepare expanded graphite. 9g of the above-mentioned phase change heat storage material and 1g of expanded graphite are placed in an oven at 60°C for blending and adsorption for 3.5 hours, 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 phase change latent heat is 180kJ / kg, the thermal conductivity is 1.02W / m.K, and the weight percentage Wt% of the paraffin wax is 90%.

[0029] Use φ8×1mm smooth red copper tube to be processed into petal-shaped finned tube, coiled into a spiral coil heat exchanger...

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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, it relates to a heat storage device of a heat storage type heat pump air conditioning device and a preparation method of its heat storage material. Background technique [0002] Heat pump air-conditioning systems are popular because they can achieve cooling in summer and heating in winter. The heat pump air conditioning system is mainly composed of an evaporator, a condenser, a compressor, an expansion valve, a four-way valve, and some connecting pipes and control components. When running under cooling conditions in summer, the indoor unit is an evaporator and the outdoor unit is a condenser; when running under heating conditions in winter, the indoor unit is a condenser and the outdoor unit is an evaporator. However, due to changes in winter weather, the outdoor temperature fluctuates greatly, which has a great impact on the performance ...

Claims

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Application Information

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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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