熱傳達 및 熱損失을 考慮한 冷凍사이클의 運轉條件

The operational condition of the refrigeration cycle taking into account of heat transfer processes and heat loss of the cold heat source

본 연구에서는 Carnot사이클로 작동되는 냉동사이클에 대하여 열교환과정 및 열손실을 고려하여 효율과 출력의 최대조건을 살펴 보고, 기존의 사이클 해석이 효율측면에서 실제장치와의 상이점으로 인하여 공학적 의미가 없어지는 문제점을 보완하고자 한다.

For the refrigeration system using the reversed Carnot cycle, maximum conditions of effectiveness and available energy output are studied with taking into account of the heat transfer between heat sources and the cycle, and of the heat loss due to heat leakage into the cold heat source. The extremum of the effectiveness exists for variables T$_{l}$ and T$_{L}$. Therefore the desirable results in engineering applications that available energy output is not zero under maximum condition of the effectiveness are obtained. In addition, the extremum of the available energy output does not exist for the variable T$_{l}$ but does for the variable T$_{L}$. As the heat loss increases, the available energy output and the effectiveness decrease, the regions of T$_{l}$ and T$_{L}$ where the refrigeration system is possible to operate become smaller.aller.