시뮬레이션 기반의 지중열교환기 설계 방법에 관한 연구

초록

Typically, the sizing of GHXs is performed using the ground response functions (g-function). Since they can be prepared ahead of sizing processes for possible bore-field configurations, consequently allowing fast calculation. However, the process includes many assumptions, and it was developed for common geothermal applications. Modern geothermal applications are various, so a detailed simulation-based sizing would be useful. The main goal of this study is to use an optimization algorithm with a numerical model for sizing. In this study, the objective function is set to entering water temperatures (EWT) to heat pump. The TRNSYS type 557 and TRNOPT, the Trnsys optimization module, are used for carrying out an optimization process. Results show that the total length calculated by the proposed method is very similar to the conventional ASHRAE sizing method.