Improvement of thermal environment and reduction of energy consumption for cooling and heating by retrofitting windows

Mochidome Takashi, Hokoi Shuichi, Ogura Daisuke, Takamura Masahiko, Suzuki Jun

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Front. Archit. Res. ›› 2013, Vol. 2 ›› Issue (1) : 1-10. DOI: 10.1016/j.foar.2012.10.006
RESEARCHARTICLE
RESEARCHARTICLE

Improvement of thermal environment and reduction of energy consumption for cooling and heating by retrofitting windows

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Abstract

Various techniques for creating a comfortable thermal environment and saving energy have been proposed and employed in residential buildings in many countries, including Japan. For these techniques to be introduced, existing houses should be renovated. Among the techniques available, installation of additional inner windows is effective in creating a comfortable and energy-efficient living environment. In the present research, the effect of additional inner windows on the thermal environment and energy saving was investigated by measuring indoor windows on the thermal environment and energy saving was investigated by measuring indoor concrete building. Air temperatures, the humidity, the global solar radiation on horizontal and vertical surfaces, radiant temperatures, and the electricity consumption of air-conditioners were measured. A comparison of these values before and after the installation of inner windows showed that the thermal environment and energy saving had improved. Results obtained from a thermal model agreed well with measured results by changing the value of solar transmittance and heat transmission coefficient of the glazing following renovation. Furthermore, in a questionnaire survey conducted in summer, more than half of the occupants answered ‘‘comfortable’’ to a question on the overall thermal comfort.

Keywords

Double-skin windows / Retrofitting windows / Thermal environment / Energy saving

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Mochidome Takashi, Hokoi Shuichi, Ogura Daisuke, Takamura Masahiko, Suzuki Jun. Improvement of thermal environment and reduction of energy consumption for cooling and heating by retrofitting windows. Front. Archit. Res., 2013, 2(1): 1‒10 https://doi.org/10.1016/j.foar.2012.10.006

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2014 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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