Reliable one-dimensional approximate solutions for insulated oblate spheroid containers

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Title:	Reliable one-dimensional approximate solutions for insulated oblate spheroid containers
Authors:	謝聰烈 Tsung-Lieh Hsien;King-Leung Wong;Wen-Li Chen;Chao-chuan Siao
Contributors:	電機工程系
Keywords:	Insulation Oblate spheroid RPSWT model Integral method
Date:	2009-12-21
Issue Date:	2010-04-21 16:03:08 (UTC+8)
Abstract:	Since there is no reliable surface-area formula available for the calculation of the heat-transfer characteristics of an insulated oblate spheroid, in this investigation, highly accurate oblate spheroid surface area is obtained by a simple numerical integration method. Based on the accurate oblate spheroid surface area, a reliable one-dimensional approximate solution of an insulated oblate spheroid container can be obtained with a one-dimensional RPSWT model. By comparing with accurate three-dimensional numerical results, it is found that in cases of low external convective coefficient (ho = 8.3Wm2 K1), long–short-axes ratio a=b53, and insulation thickness t=R252, errors are within 3%. In rarer situations with a=b55 and t=R252, the errors are within 5.5%. The above results are almost independent with the internal flow convective coefficient (hi from 30 to 105Wm2 K1) and dimensionless container size (0.5R2ho/Ks from 1.55 to 155).
Relation:	Energy Conversion and Management 50 (2009) 1871–1878
Appears in Collections:	[電機工程系所] 期刊論文

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