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Sustainability 2018, 10(8), 2835; https://doi.org/10.3390/su10082835

Impact of Insulation Type and Thickness on the Dynamic Thermal Characteristics of an External Wall Structure

Department of Architectural Engineering, Graduate School of Engineering, Osaka University, Suita 5650871, Japan
Received: 13 July 2018 / Revised: 1 August 2018 / Accepted: 7 August 2018 / Published: 9 August 2018
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Abstract

The dynamic thermal characteristics of external wall structures are directly related to indoor thermal comfort and energy savings in buildings; they are also complicated and worth investigating. Thermal insulation in external wall structures has become a popular topic of investigation in the domain of building energy efficiency. This study aims to find the impact of insulation type and thickness on the dynamic thermal characteristics of external wall structures using a homogeneous multi-layer building external wall structure and three types of insulation materials that are widely used in Japan. The impact of insulation type and thickness on seven thermal characteristics of external walls, including thermal transmittance, decrement factor or amplitude attenuation, time lag, thermal admittance, time lead for thermal admittance, surface factor, and thermal capacity, was evaluated by numerical methods in this study. It was shown that insulation type and thickness would have a significant effect on thermal transmittance, decrement factor and time lag, but yield no significant change in thermal admittance, time lead for thermal admittance, surface factor, and the thermal capacity of external wall structures. View Full-Text
Keywords: external wall structure; thermal characteristics; insulation type; insulation thickness; numerical analysis external wall structure; thermal characteristics; insulation type; insulation thickness; numerical analysis
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Yuan, J. Impact of Insulation Type and Thickness on the Dynamic Thermal Characteristics of an External Wall Structure. Sustainability 2018, 10, 2835.

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