Comparison of heat gain values obtained for building structures with real and constant properties
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Date
2019Author
ARGUNHAN, Zeki
OKTAY, Hasan
YUMRUTAŞ, Recep
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The magnitude of energy consumption due to the 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 the thermophysical
properties of building structures. In the 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 the solution of the 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
the 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.
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