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Improvement of thermal environment and reduction of energy consumption for coolin8 and heating by retrofitting windows

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Frontiers of Architectural Research 2013年第1期2卷 1-10页

作者： Mochidome Takashi Hokoi Shuichi Ogura Daisuke Takamura Masahiko Suzuki Jun Kyoto University Kyoto 606-8501 Japan VEC Japan LIXIL Japan

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 climates. windows were renovated in two rooms on the fourth floor of a four-story reinforced 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 vatues 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 forlowing renovation. Furthermore, in a questionnaire survey conducted in summer, more than half of the occupants answered ＂cornfortabte＂ to a question on the overall thermal comfort.

关键词： double-skin windows Retrofitting windows Thermat environ-ment Energy saving

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