Using Orthogonal Expansion of Functions Over Multilayer Walls for Calculating the Layer Thermal Properties

Antonopoulos, KA; Tzivanidis, C; Vrachopoulos, M

dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Tzivanidis, C	en
dc.contributor.author	Vrachopoulos, M	en
dc.date.accessioned	2014-03-01T01:13:29Z
dc.date.available	2014-03-01T01:13:29Z
dc.date.issued	1997	en
dc.identifier.issn	1359-4311	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12507
dc.subject	Heat capacity	en
dc.subject	Multilayer walls	en
dc.subject	Property estimation	en
dc.subject	Thermal conductivity	en
dc.subject	Transient heat conduction	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Building materials	en
dc.subject.other	Estimation	en
dc.subject.other	Heat conduction	en
dc.subject.other	Heat transfer	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Numerical methods	en
dc.subject.other	Specific heat	en
dc.subject.other	Structural design	en
dc.subject.other	Temperature measurement	en
dc.subject.other	Thermal conductivity	en
dc.subject.other	Thermodynamic properties	en
dc.subject.other	Walls (structural partitions)	en
dc.subject.other	Multilayer walls	en
dc.subject.other	Orthogonal expansion of functions	en
dc.subject.other	Property estimation	en
dc.subject.other	Multilayers	en
dc.title	Using Orthogonal Expansion of Functions Over Multilayer Walls for Calculating the Layer Thermal Properties	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1359-4311(96)00015-4	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1359-4311(96)00015-4	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	An analytical method is presented for on-site estimation of the layer thermal properties of multilayer walls, based on separation of time and space variables, and on orthogonal expansion of functions over the multilayer walls. The advantage of the present method over previous analytical and numerical ones is that it requires temperature measurements on the outdoor and/or indoor wall surfaces, and not necessarily at locations within the wall, as previous procedures for multilayer walls do. The proposed method was tested theoretically and experimentally by applying it to multilayer walls of known properties. The agreement between calculated and known values was very good in all tests. The proposed method may be used for ex-post examination of structural materials used by a constructor, in analogous applications concerning archaeological monuments, and in the estimation of heating and cooling loads in old buildings with multilayer walls of unknown materials. The method may also be used in the design of special purpose buildings for selecting structural materials, which should meet certain temperature specifications. Copyright (C) 1996 Elsevier Science Ltd.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Applied Thermal Engineering	en
dc.identifier.doi	10.1016/S1359-4311(96)00015-4	en
dc.identifier.isi	ISI:A1997VY20400007	en
dc.identifier.volume	17	en
dc.identifier.issue	2	en
dc.identifier.spage	193	en
dc.identifier.epage	201	en