도시가스 사용량을 활용한 공동주택의 난방에너지 소비량 예측에 관한 연구

The purpose of this paper is to predict heating energy consumption by using estimated balance point temperature and internal heat gain. To estimate balance point temperature and internal heat gain, variable heating degree day method and generalized reduced gradient method(GRG) using amount of city gas consumption of a apartment housing for 4 years are applied. As increasing internal heat gain due to solar heat gain, the balance point temperature is lowed. If U-value of building envelope(external wall and window) is reinforced by 2015 standard, average 59% of heating energy consumption is reduced. In particular, increasing internal heat gain, effect of heating energy saving is greater.