Exergetic Classification of Geothermal Resources in Japan

Abstract

Higher demand for energy consumption and importance of environmental issues has encouraged researchers and policy makers to consider renewable energies more seriously. Geothermal resources are a green energy source that can make a considerable contribution in some countries. Japan has the third ranking geothermal energy potential, and its geothermal electricity production is currently eighth in the world. Since the nature of geothermal resources dictates its method of utilization, it is important to categorize available resources. There is no consensus on classification of geothermal resources. Using exergy for resource classification benefits their comparison, according to their ability to do work. In this paper, geothermal power plants are classified using the exergy concept. Classification results can be used by decision makers as a reference for future geothermal development.