ISO 13790 한국형 유효계수 결정 방법론에 관한 연구

Utilisation factors used in ISO 13790 are determined by time constant and gain/loss ratios and should be redefined for climate condition to improve the accuracy of the heating/cooling loads in each region or country. The purpose of this study is to suggest reference time constants and dimensionless reference numerical parameters which are applicable for buildings in Korean context. Using Energy plus detailed simulation models were made representing high weight/high insulated rooms surrounded by external environment and a light weight (curtain wall type) room adjacent to internal environment. Equivalent models were made with an ISO 13790-based calculation tool in which numerous combinations of reference time constants and dimensionless reference numerical parameters can be tested. After examining the agreement between results from Energy plus simulation and those of the ISO 13790-based tool, a set of reference time constants and dimensionless reference numerical parameters are suggested which reduce the error rates significantly. This paper presents the methodology of new utilisation factors calculation and outcomes of the examination.