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New Minerals Study Results from J.L. Zeng et al Described (Tetradecanol/expanded graphite composite form-stable phase change material for thermal...

August 15, 2014



New Minerals Study Results from J.L. Zeng et al Described (Tetradecanol/expanded graphite composite form-stable phase change material for thermal energy storage)

By a News Reporter-Staff News Editor at Energy Weekly News -- Researchers detail new data in Minerals. According to news reporting originating in Changsha, People's Republic of China, by VerticalNews journalists, research stated, "Natural flake graphite was chemically intercalated to prepare expandable graphite. The expandable graphite was then expanded by means of microwave irradiation to obtain expanded graphite (EG)."

The news reporters obtained a quote from the research, "Tetradecanol (TD)/EG composite form-stable phase change materials (PCMs) were prepared by mixing TD with EG through an autoclave method. The highest loading of TD in the composite form-stable PCMs with good form-stability was 93 wt%. The composite form-stable PCMs exhibited excellent thermal energy storage capacity. The melting enthalpy (Delta H-m) and crystallization enthalpy (Delta H-c) of the composite form-stable PCM containing 93 wt% TD were 202.6 and 201.2 J/g, respectively. However, the solid-solid phase transition of TD in the composite form-stable PCMs was hindered as TD was strongly absorbed by EG. As a result, the Delta H-m and Delta H-c of the composite form-stable PCMs were slightly lower than the theoretical value. The thermal conductivity of the composite form-stable PCMs was greatly enhanced by EG and was increased with the increasing of EG loading."

According to the news reporters, the research concluded: "The thermal conductivity of the composite form-stable PCM containing 7 wt% EG attained 2.76 W/m K. Besides, effects of the prepared EG on properties of the composite form-stable PCMs were compared with those of EG derived from commercially obtained expandable graphite."

For more information on this research see: Tetradecanol/expanded graphite composite form-stable phase change material for thermal energy storage. Solar Energy Materials and Solar Cells, 2014;127():122-128. Solar Energy Materials and Solar Cells can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Solar Energy Materials and Solar Cells - www.elsevier.com/wps/product/cws_home/505675)

Our news correspondents report that additional information may be obtained by contacting J.L. Zeng, China Tobacco Hunan Ind Corp, Changsha 410007, Hunan, People's Republic of China. Additional authors for this research include J. Gan, F.R. Zhu, S.B. Yu, Z.L. Xiao, W.P. Yan, L. Zhu, Z.Q. Liu, L.X. Sun and Z. Cao.

Keywords for this news article include: Asia, Carbon, Changsha, Graphite, Minerals, Nanotechnology, Emerging Technologies, Phase Change Material, Thermal Energy Storage, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Energy Weekly News


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