Journal
JOURNAL OF BUILDING ENGINEERING
Volume 21, Issue -, Pages 373-395Publisher
ELSEVIER
DOI: 10.1016/j.jobe.2018.11.002
Keywords
Building materials; Thermal performance; Admittance method; Finite difference method
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The current study investigates the thermal performance parameters of the building wall envelopes. The two wall systems, homogenous and composite wall envelope configurations were considered in this study by adopting conventional and alternative building materials. The study is based on theoretical investigation in evaluating the thermal performance parameters of the building envelope by adopting admittance method and finite difference methods. The effects of various wall configurations on time lag and decrement factor, interior surface instantaneous thermal load and the influence of exterior surface heat transfer coefficient on the time lag and decrement factors have been studied. Even dynamic thermal performance parameters such as thermal admittance, decrement factor, surface factor and its time leads and heat capacitance, effect of thermal conductivity and optimum thickness for maximum energy storage also studied. The study results reveal the impact of various building material thermal properties and its configurations as envelope on the thermal performance parameters.
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