Sustainable Building Energy Systems Laboratory

논문 초록 (Abstract)

The outdoor temperature reset (OTR) control method is widely used to control the setpoint temperature of heating supply water obtained from heat exchangers at mechanical rooms in an apartment building using district heating. In general, the OTR control consists of an algorithm that sets the maximum and minimum water setpoint temperatures based on the outdoor air temperature. The water temperature settings are very important variables when optimizing the performance of OTR control systems. However, in most apartment buildings these temperatures are arbitrarily determined according to the facility operator’s experience. Therefore, the purpose of this study is to determination the optimal setpoint temperatures for OTR control that also take into consideration heating energy consumption and load dissatisfaction. As a result, the optimal water setpoint temperatures for balancing each system’s thermal load dissatisfaction and heating energy consumption were 60.75℃ (maximum) and 45.75℃ (minimum) for four test cases examined in this study. In terms of applying the optimal setpoint temperatures, the consumption of energy was lower and thermal load dissatisfaction moderate as compared to the test cases. This study argue that OTR control using the optimal setpoint temperature will reduce heating energy and provide a stable thermal load.