Geothermal energy is one type of renewable energy which the
Thailand government sets a geothermal policy to increase the power
generation to be 1 MW in 2021. Department of Mineral Resources
of Thailand [1] reports 112 hot springs in Thailand. In 2008, Chiang
Mai University (CMU) [2] also reported 97 potential of hot springs in
Thailand and classified them into three groups as high, moderate and
low potential which is shown in Figure 1. For high potential hot spring,
the surface water temperature is higher than 80°C. Moderate potential
hot spring refers the surface water temperature between 60-80°C and
low potential hot springs represents the surface water temperature
is lower than 60°C. Thus, the aim of this research is to study the
appropriate technologies for using geothermal energy in Thailand.