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

Year 2019, , 1518 - 1532, 24.12.2019

Hasan Oktay , Zeki Argunhan Recep Yumrutaş

https://doi.org/10.17798/bitlisfen.645016

Cited By: 2

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

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