Comparison of heat gain values obtained for building structures with real and constant properties

Authors : Hasan OKTAY, Zeki ARGUNHAN, Recep YUMRUTAŞ

Pages : 1518-1532

Doi:10.17798/bitlisfen.645016

View : 21 | Download : 12

Publication Date : 2019-12-24

Article Type : Research Paper

Abstract :The magnitude of energy consumption due to heating and cooling of buildings has led to the demand for increasing the thermal performance of building structures. Many investigations are presented in literature arguing to find the effect of each thermophysical property on the thermal characteristics of building components, while the properties have been assumed as independent of each other. In this context, this paper focuses on the effect of each property on heat gain value utilizing relationships between the measurement values of thermophysical properties of building structures. In previous study, 102 new wall samples were produced, their thermophysical properties were tested and expressions among these properties are obtained. In this study, the heat gain values through the structures are computed using solution of transient heat transfer problem by using both the obtained expressions between the thermophysical properties and assumptions proposed from the literature. Results obtained for varying and constant thermophysical properties have been compared with those values presented in literature. The results show that the assumptions are not realistic in a significant number of cases. Moreover, if one of the thermophysical properties of a material is known, heat gain values can be calculated easily for the selected wall or roof types.
Keywords : Building structure, thermophysical properties, heat gain, CFFT