Title: The Experimental Study on Paraffin Wax Phase Change Heat Transfer Enhancement with Copper Nano-particles
Abstract: Based on paraffin wax(octadecane) as a kind of solid-liquid phase change materials(PCMs) having the disadvantages of low thermal conductivity and bad heat transfer performance,octadecane/copper nano-particles composite PCMs were prepared by two steps and their thermal properties were measured.The mass fraction of copper nano-particles in PCMs is 0.1%,0.2%,0.5%,1% and 2%,respectively.Transient hot probe method was used to measure the thermal conductivity of PCMs.The results show that copper nano-particles can effectively improve the thermal conductivity of octadecane.Thermoanalysis measurement was finished by differential scanning calorimetry(DSC) analysis techniques.The results show that the phase-transition temperature of octadecane which is added with copper nano-particles changes little,while the latent heat of the composite PCMs gradually decrease with the increa-sing mass fraction of copper nano-particles,but decrease slightly.Therefore copper nano-particles have less influence on the heat storage capacity of octadecane.Finally,the heat stability of octadecane/copper nano-particles composite PCMs which contain 1% copper nano-particles was studied by DSC analysis techniques.The results show that latent heat and phase-transition temperature of composite PCMs do not obviously decrease with the increasing number of thermal cycles,demonstrating that composite PCMs have good thermal stability.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 3
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