Ground temperature estimations using simplified analytical and semi-empirical approaches

dc.contributor.author	Droulia, F	en
dc.contributor.author	Lykoudis, S	en
dc.contributor.author	Tsiros, I	en
dc.contributor.author	Alvertos, N	en
dc.contributor.author	Akylas, E	en
dc.contributor.author	Garofalakis, I	en
dc.date.accessioned	2014-06-06T06:49:25Z
dc.date.available	2014-06-06T06:49:25Z
dc.date.issued	2009	en
dc.identifier.issn	0038092X	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.solener.2008.07.013	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/4586
dc.subject	Energy conservation	en
dc.subject	Ground temperature	en
dc.subject	Heat conduction equation	en
dc.subject	Heat transfer	en
dc.subject	Modeling	en
dc.subject	Temperature distribution	en
dc.subject.other	Computer simulation	en
dc.subject.other	Dielectric properties	en
dc.subject.other	Energy conservation	en
dc.subject.other	Energy management	en
dc.subject.other	Estimation	en
dc.subject.other	Gas turbines	en
dc.subject.other	Heat conduction	en
dc.subject.other	Heat exchangers	en
dc.subject.other	Heat transfer	en
dc.subject.other	Image coding	en
dc.subject.other	Mathematical models	en
dc.subject.other	Soils	en
dc.subject.other	Temperature	en
dc.subject.other	Temperature distribution	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Analytical models	en
dc.subject.other	Average temperatures	en
dc.subject.other	Data requirements	en
dc.subject.other	Empirical approaches	en
dc.subject.other	Empirical models	en
dc.subject.other	Energy applications	en
dc.subject.other	Ground temperature	en
dc.subject.other	Heat conduction equation	en
dc.subject.other	Model developments	en
dc.subject.other	Model results	en
dc.subject.other	Modeling	en
dc.subject.other	Observational datums	en
dc.subject.other	Soil temperatures	en
dc.subject.other	Steady states	en
dc.subject.other	Geologic models	en
dc.subject.other	comparative study	en
dc.subject.other	empirical analysis	en
dc.subject.other	energy conservation	en
dc.subject.other	heat transfer	en
dc.subject.other	modeling	en
dc.subject.other	soil temperature	en
dc.subject.other	temperature profile	en
dc.subject.other	thermal conductivity	en
dc.title	Ground temperature estimations using simplified analytical and semi-empirical approaches	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.solener.2008.07.013	en
heal.publicationDate	2009	en
heal.abstract	In this work, subsurface ground temperature profiles are estimated by exploiting two different approaches. In the first one, an analytical model is examined which, considering a quasi steady state system, implements the superposition of annual and daily sinusoidal fluctuations. In the second one, semi-empirical models are developed based on the general formula of the preceding, by replacing the steady state soil temperature with easily obtained daily average temperatures. Various subsets of soil temperature were used for model development, in order to explore the possibility of minimizing data requirements. Comparison of observational data with model results reveals that the observational patterns of hourly soil temperature are fairly well approximated by both by the analytical and the semi-empirical models. All models seem to capture the main characteristics of the annual course of soil temperature, with the results obtained from the semi-empirical models fluctuating in a much more realistic way than those of the analytical model. It is concluded that the proposed models may serve as useful tools for estimating and predicting soil temperatures to be used as practical reference in various environmental and energy applications. © 2008 Elsevier Ltd. All rights reserved.	en
heal.journalName	Solar Energy	en
dc.identifier.issue	2	en
dc.identifier.volume	83	en
dc.identifier.doi	10.1016/j.solener.2008.07.013	en
dc.identifier.spage	211	en
dc.identifier.epage	219	en