Subject:- Renewable Energy Sources

Topic:- Geothermal Energy

Difficulty:- High

Advantages:

• Power developed is continuous and it is independent of weather.
• There is a small variation in power output from season to season .
• The system uses conventional power plants needing only small changes in design.
• It can produce simultaneously the desalinated water and nutrients for agriculture.

Disadvantages:

• Capital cost is very high.
• Efficiency of energy conversion is very low.
• Needs very large sized turbines due to use of low pressure of steam having high specific volume in case of open cycle.
• It uses expensive power working fluids in case of closed cycle.
• Cost of electric power generation per kWh is very high.