Thermal Performance of the Receivers for the Dish-Type Solar Energy Collecting System of Korea Institute of Energy Research

초록

Heat losses from the receivers for the dish-type solar energy collecting system located at Korea Institute of Energy Research are analyzed and the thermal performances of these are estimated. The Stine and McDonald model is used to estimate convective heat loss. The Net Radiation method is used to calculate the radiation heat transfer rate from the inside surface of the receiver to the surroundings. And, the Monte-Carlo Method is adopted to predict the radiation heat transfer rate from the reflector to the receiver. The performances of the receivers are estimated and compared with each other. The overall thermal performance of Receiver I is better than that of Receiver II, and the amount of radiation energy that is not captured by the receiver after entering the inside of the receiver becomes significant if the temperature of the working fluid is low.