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건물 부하계산 프로그램을 이용한 외단열 시공의 에너지 절감 효과 분석
박재중(Jaejoong Park),명제민(Jemin Myeong),송두삼(Doosam Song) 대한설비공학회 2017 설비공학 논문집 Vol.29 No.3
Reinforcement of insulation in apartment buildings reduces the heating and cooling energy consumption by lowering the heat transfer in the building envelope. There are differences between internal and external insulation methods in heat transmission properties. However, some building load calculation programs cannot analysis the differences between the two. This is because these programs do no account for the timelag or thermal storage effect of the wall according to the location of insulation. In this study, the heat transmission characteristics of internal and external insulation were analyzed by EnergyPlus, and heating and cooling energy demand was compared. The results showed that external insulation system had lower heating and cooling loads than internal insulation system. Also the heat transfer rate of external insulation is steadier than internal insulation. About 13.6% of heating and cooling energy demand decreased when the outdoor wall was finished with external insulation compared to the demand with internal insulation.
EnergyPlus을 이용한 내단열, 외단열 공법의 열류 해석
박재중(Jaejoong Park),김재형(Jaehyung Kim),송두삼(Doosam Song) 대한설비공학회 2015 대한설비공학회 학술발표대회논문집 Vol.2015 No.11
In this study, heat transmission characteristics between internal and external insulation system were analyzed by energy simulation program-EnergyPlus. Even though, there are differences between internal insulation and external insulation in heat transmission properties, some building load calculation methods cannot account these differences. Also, the behavior of heat transmission of the wall may be different according to the analytical methods such as conduction transfer functions (CTF), conduction finite difference (ConFD). In this paper, as a simulation tool, the heat transmission characteristics of EnergyPlus were analyzed in case of the insulation is installed inner or outer side of the wall. As a result, the thermal storage effect of time-lag effect in wall system was reflected by EnergyPlus.
박재중(Jaejoong Park),명제민(Jemin Myeong),송두삼(Doosam Song) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.11
External insulation system can help to save energy by heat storage effect that is related to heat capacity. For example, water has one of the highest thermal capacities heat capacity - 4.2 J/(cm³·K) whereas concrete has about one third of that. To confirm the benefit of this effect, this study analyzed heat transmission properties of internal and external insulation system by EnergyPlus simulation method. As a result, external insulation system showed a lower heating and cooling loads than internal insulation system. Also heat transfer rate of external insulation system is more steady than internal insulation system. The external insulation system is effective for energy saving as compared with the internal insulation system. About 13.6% of heating and cooling energy demand is decreased when the outdoor wall was finished with external insulation system compared to those of the internal insulation system.