How can geothermal energy be used for electricity generation? 11720115 Akihiro Nimura.

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Presentation transcript:

How can geothermal energy be used for electricity generation? Akihiro Nimura

It is the thermal energy originating in the heat source inside the earth. It is the thermal energy originating in the heat source inside the earth. The stable supply through one year is obtained. The stable supply through one year is obtained. CO 2 emission is little. CO 2 emission is little. Geothermal energy

Geothermal generation system Now three systems are mainly used for the geothermal generation. Now three systems are mainly used for the geothermal generation. 1. Dry steam 1. Dry steam 2. Flash cycle 2. Flash cycle 3. Binary cycle 3. Binary cycle

Dry steam Steam rising ↓ Rotating turbine ↓ Generating electric power For example, Matsushima and Hachijo ｊ ima geothermal plant

Flash cycle Steam rising ↓ Rotating turbine ↓ Generating electric power Separating steam and brine For example, Hachobaru and Mori geothermal plant

Binary cycle Heating low boiling temperature fluid (Ex. NH 3, C 5 H 12,CFC) ↓ Rotating turbine ↓ Generating electric power For example, Hachijozima geothermal plant

Conclusion Geothermal energy is clean energy and ha ｓ no limits. Geothermal energy is clean energy and ha ｓ no limits. Now geothermal power plants are about 20 plants in Japan. Now geothermal power plants are about 20 plants in Japan. I think by increasing the geothermal power plants can instead nuclear power plants In Japan. I think by increasing the geothermal power plants can instead nuclear power plants In Japan.

Thank you for your attention