TY - JOUR
T1 - Application of infrared thermography for in-situ determination of building envelope thermal properties
AU - Lu, Xinrui
AU - Memari, Ali
N1 - Funding Information:
This research was supported by the Pennsylvania Housing Research Center (PHRC).
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/11
Y1 - 2019/11
N2 - Thermal resistance of building envelope systems plays an important role in the building energy evaluation, design, and retrofit efforts; in-situ determination of the thermal resistance is highly desired for obtaining a realistic building energy performance picture. The conventional heat flow meter method for measuring thermal resistance requires a considerable number of sensor installations and also an appropriate definition of the homogeneous wall area. Therefore, a simpler and more practical measurement method is needed. Recent studies indicate that the infrared thermography method has the potential to be used as a quantitative technique for thermal resistance measurement. However, there are limitations in the previously developed infrared thermography method that may lead to difficulties in practical application. In the study reported in this paper, an innovative infrared thermography model is proposed and its effectiveness is validated by comparison with the heat flow meter method. A convective heat transfer coefficient model is also proposed, which can particularly be used for low-rise residential buildings. A recommended testing procedure is then given at the end of the paper for appropriate use of the proposed measurement method.
AB - Thermal resistance of building envelope systems plays an important role in the building energy evaluation, design, and retrofit efforts; in-situ determination of the thermal resistance is highly desired for obtaining a realistic building energy performance picture. The conventional heat flow meter method for measuring thermal resistance requires a considerable number of sensor installations and also an appropriate definition of the homogeneous wall area. Therefore, a simpler and more practical measurement method is needed. Recent studies indicate that the infrared thermography method has the potential to be used as a quantitative technique for thermal resistance measurement. However, there are limitations in the previously developed infrared thermography method that may lead to difficulties in practical application. In the study reported in this paper, an innovative infrared thermography model is proposed and its effectiveness is validated by comparison with the heat flow meter method. A convective heat transfer coefficient model is also proposed, which can particularly be used for low-rise residential buildings. A recommended testing procedure is then given at the end of the paper for appropriate use of the proposed measurement method.
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U2 - 10.1016/j.jobe.2019.100885
DO - 10.1016/j.jobe.2019.100885
M3 - Article
AN - SCOPUS:85069705672
SN - 2352-7102
VL - 26
JO - Journal of Building Engineering
JF - Journal of Building Engineering
M1 - 100885
ER -