A Study on the Optimum Cooling Span of the Underground Power Transmission Cable Equipped by a Forced Cooling System

전력구내 지중케이블 강제냉각에서의 적정냉각구간에 관한 연구

The forced cooling system has been widely applied to passing more electric current in the underground power transmission cable technology. In this paper, the optimum cooling span of the in-trough-indirect water cooling method within an electric tunnel was investigated. A parametric study was performed for the cable currents, the coolant flow rates, and the coolant inlet temperatures. As a result, the temperature of the inlet air has been found as the most important parameter in determination of the optimum cooling span.