Organic mix phase-changing material for air conditioner cold accumulation

A hybrid phase change material and organic technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low phase change temperature and low system operation efficiency

Inactive Publication Date: 2008-07-16
贾代勇 +3
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Problems solved by technology

[0003] In order to overcome the defect of low system operation efficiency caused by the low phase change temperature of the cold storage medium in the current ice storage system, the present invention configures an organic hybrid phase change material used to replace ice as the cold storage medium

Method used

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Embodiment Construction

[0004] The invention utilizes organic aminoethanol as the matrix of the cold storage medium, adds a certain proportion of water to form an organic co-melt, adjusts its phase transition temperature to a suitable temperature range, and adds a compatible high thermal conductivity metal therein Dielectric aluminum to enhance the effective thermal conductivity of the material. The specific embodiment is as follows: fully mix aminoethanol with a mass ratio of 99.4% to 98% and 0.6 to 2% water and stir evenly to make it an organic blend, and mix the mixed medium with a mass ratio of 1 ~5%, aluminum powder with a particle size of 1~4μm is used as an accelerator, and it is fully stirred to make it evenly mixed. The phase transition temperature of the mixed material is 6-9.2° C., the latent heat of phase transition is 155-196 kJ / kg, and the liquid-phase thermal conductivity is 0.27-0.48 W / (m.K).

[0005] Beneficial effect:

[0006] The mixed phase change material obtained by the method...

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Abstract

The invention relates to an organic additive phase-change material used for air conditioning cold storage, and is prepared by forming an organic eutectic body of aminoethanol with mass ratio of 99.4 percent-98 percent and 0.6-2 percent of water, wherein, aluminium powder with a mass ratio of 1-5 percent, and particle size of 1-4Mum is added and mixed into the eutectic body. The phase-change temperature of the material is 6-9.2 DEG C; the phase-change latent heat is 155-196kJ / kg; the liquidus thermal conductivity is 0.27-0.48W / (m.k). The invention has the advantages that the phase-change temperature is proper; the latent heat is high; the condenser depression is low; the chemical stability is good; the thermal conductivity is high; in the application of the invention to the air conditioning cold storage system, a general refrigerating battery can be directly adopted for the cold storage, thus effectively improving the property coefficient of the refrigerating battery and lowering the energy consumption of the system.

Description

Technical field: [0001] The invention relates to an organic mixed phase-change material which can be used for air-conditioning cold storage. Background technique: [0002] At present, in the cold storage technology of air-conditioning systems, ice storage has become the mainstream in the field of cold storage due to its low price, stable performance, and large latent heat. However, there are still two main disadvantages in this technology: first, the phase transition temperature of water is low, so that the evaporation temperature of the refrigerator during ice making and charging is 8-10°C lower than that of conventional non-cooling storage air conditioners. This not only limits the types of refrigerators that can be used, but also reduces the operating efficiency of refrigerators by about 30%, and significantly increases power consumption. Therefore, it is a cost-effective and energy-saving air-conditioning method. Second, due to the addition of cold storage and ice makin...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 贾代勇杜雁霞袁艳平程宝义
Owner 贾代勇
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