Effects of indoor and outdoor heat-transfer coefficients and solar absorptance on heat flow through walls

Antonopoulos, KA; Valsamakis, SP

dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Valsamakis, SP	en
dc.date.accessioned	2014-03-01T01:09:23Z
dc.date.available	2014-03-01T01:09:23Z
dc.date.issued	1993	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10940
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0027556041&partnerID=40&md5=da9fa7e171e0e05c4da3e52d031a520b	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	Approximation theory	en
dc.subject.other	Correlation methods	en
dc.subject.other	Differential equations	en
dc.subject.other	Energy absorption	en
dc.subject.other	Finite difference method	en
dc.subject.other	Heat conduction	en
dc.subject.other	Heat losses	en
dc.subject.other	Mathematical models	en
dc.subject.other	Solar radiation	en
dc.subject.other	Space heating	en
dc.subject.other	Temperature	en
dc.subject.other	Wall flow	en
dc.subject.other	Indoor and outdoor heat transfer coefficients	en
dc.subject.other	One dimensional heat conduction differential equations	en
dc.subject.other	Solar absorptance	en
dc.subject.other	Heat transfer	en
dc.title	Effects of indoor and outdoor heat-transfer coefficients and solar absorptance on heat flow through walls	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	In the calculation of space heat gain or loss through walls, it is customary to use standard values of the indoor and outdoor heat-transfer coefficients and solar absorptance h(int), h(out) and alpha, respectively. This practice may lead to considerable errors. In the present study, the effects of these parameters are examined by solving the transient one-dimensional heat-conduction differential equation using the finite-difference method within typical wall constructions of various orientations with per-iodic outdoor boundary conditions, during typical winter and summer days. Using the results obtained, correlations are developed which express the daily maximum indoor heat flow for various orientations during the typical winter and summer days and the time at which this maximum value occurs in terms of h(int), h(out) and alpha. Although these correlations were developed for a typical wall construction, location and indoor air temperature, they may be used as approximations for different wall constructions, locations and indoor air temperatures after making suggested corrections.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy	en
dc.identifier.isi	ISI:A1993KN10400004	en
dc.identifier.volume	18	en
dc.identifier.issue	3	en
dc.identifier.spage	259	en
dc.identifier.epage	271	en