Assessment of energy consumption in desalination of sea water on the basis of conceptual designs and surveys

Abstract

Energy equivalent of sea water desalination are quoted as the most suitable measure in the phase discussing here from various survey reports in Japan which include conceptual designs of desalting plants such as dual purpose systems and MSF processes to utilize industrial waste heats. These systems are alloted for supplementing the shortage of drinking water from rivers which may dependent on the rainfall. Then, a diagram is proposed to indicate preferable region for construction of desalting plants or river development from view points of both energy consumption and economy These ideas were applied to the survey for introducting desalting plant in an industrial city and the necessary energy to produce fresh water from the sea was estimated for the case of 1/10 arid year. The amount of the order of a little less than 1% to the total energy consumption of the city should be evaluated from the view point of total human activities