공조시스템 용량과 재가동 시작 시간 설정에 따른 실내 열환경 및 에너지 사용량 평가

Abstract

An office heating system is intermittently operated according to general occupancy patterns. When the heating system is not operated, the heating load accumulates in the indoor space, causing a decrease in the indoor air temperature. Because of this phenomenon, recovery times are required when the heating system is restarted and are affected by the heating system capacity and restart time. An excessive capacity causes an increase in the recovery time and an insufficient capacity causes an increase in the installation cost. Also, if the heating system restart time is set late, it may cause a worsening of the indoor thermal environment. Conversely, if the restart time is set early, it may cause unnecessary energy usage, therefore, determining the optimal capacity and restart time is important. This study aims to evaluate the recovery time and energy usage according to various heating system capacities and restart times. To achieve this, an energy simulation was implemented using EnergyPlus by varying the heating system capacity and restart time. As a result, the recovery time varied between 46-379 min and the daily energy consumption varied between 636.0-879.7 kWh with various heating system capacities. The recovery time varied between 53-118 min and the daily energy consumption varied between 675.4-869.8 kWh with various heating system restart times.