동심원관-pin fin 열교환기를 이용한 소형 증기보일러 대류실 설계

The design of heat exchanger of small size steam boiler using the concentric annuli tube with pin fin

The configurations of the heat exchanger of the boiler can be determined from the trade-off between the heat transfer area which is related to the capital cost and the pressure drop which is related to operating cost. In this study, 3.5 ton/hr small size marine boiler having concentric annuli tubes is the design boiler. To determine the optimizing point, according to diameter, number, length of tube, heat transfer, pressure drop, operating cost and capital cost have been calculated. Also, when the fin tube is replaced by the bare tube design parameters changed have been calculated.