해수 냉난방시스템을 활용한 냉동법 담수화시스템 성능해석

Abstract

The paper presents the simulation results of freezing desalination performance with seawater heat pump system. The basic model of seawater heat pump system is refrigeration cycle and indirect freezing desalination method is used for seawater desalination. The cycle performance of seawater heat pump such as COP, compressor work, working fluid flow rate was analyzed and the desalination characteristics such as fresh water productivity and energy per unit fresh water productivity were compared with respect to the seawater temperature of evaporator inlet and ice ratio in the evaporator. The seawater flow rate decreased on the increase of seawater inlet temperature and ice ratio and showed about 28.9% at 5℃ seawater inlet temperature higher than that of 20℃. Also, the fresh water productivity increased with respect to the decrease of seawater inlet temperature and the increase of the ice ratio. The energy per unit fresh water productivity in case of 5℃ seawater inlet temperature showed 27.5% lower than that of 20℃.