Abstract
Recently, deep sea water is used for fishery, air-conditioning, products such as fresh water, face lotion and so on. It is very important to concern with cascade system of deep sea water, because deep sea water utilization system is very expensive and the amount of water drawn has limit. In this paper we estimate utilizable thermal energy and nutrient such as nitrogen, phosphorus and silicon on deep sea water intake facilities in Kochi, Toyama and Okinawa.
