Experimental Study of Condensation Heat Transfer in Pre-heating Exchanger to the Type of Hydrophilic Surface Treatment

친수 표면처리 종류에 따른 공기 예열 열교환기의 응축 열전달 실험적 연구

Recently, an energy-saving due to the energy utilisation efficiency enhancement is important. In order to improve the heat efficiency of the general residential boiler, We performed an experiment of condensation heat transfer to air pre-heat exchanger adhered to the condensing boiler. In this research, We analyze the heat transfer performance through the hydrophilic surface treatment(plasma, etching). The results of the research, On plasma and etching treated surface, Overall heat transfer coefficient is displayed the tendency to increase.