Development of the linear approximation prediction method of transient heat load of underground structures and a heat performance index

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This study was conducted to establish a predictable method for a heat load of an underground structure with sufficient accuracy. In this study, the authorsdeveloped the simple load calculation technique, using a linearized approximation indicial response of the inner surface heat flux in a basement to outdoor air temperature change. In addition, the approximation indicial responses for each part of the single walled concrete drawn using this technique were arranged. The heat load calculation example of application to the basement of the optional size by this technique was shown.