다관형 잠열축열장치의 축열특성연구 -물을 매체로 한 축열 및 방열과정 분석-

Study on the Thermal Storage Characteristics of a Multi-capsule type LTES System -Analysis for Heat Charging and Discharging Process for Water Flow-

  • 김영복 (경상대학교 농과대학 농업기계공학과)
  • 발행 : 1994.03.31

초록

This study was designed to seek information on the heat charging and discharging characteristics of a multi-capsule type LTES(Latent Heat of Fusion Thermal Energy Storage) system, and especially prediction equation of outlet water temperature from the system. During heat charging process, the water temperature in the LTES tank increased very slowly in comparison with a predicted one and was kept near the melting point of the PCM for about 25 minutes. During heat discharging process, the latent heat discharging period of the outlet water temperature became longer as the inlet water temperature became higher and/or mass flow rate became lower. The dimensionless temperature of the outlet water was predicted by linking three equations of ${\theta}=1.1Exp(-{\tau}/0.82)$, ${\theta}=-0.06{\tau}+0.3$, ${\theta}=0.8Exp(-{\tau}/1.4)$ ($r^2{\leq}0.88$) depending on discharging period regardless of mass flow rates on the case of the inlet water temperature at $21.5^{\circ}C$.

키워드

과제정보

연구 과제 주관 기관 : 학술진흥재단