Global Environment Outlook: The Thermal Power Energy
Introduction • Global Environment Outlook is the thermal energy. this energy is generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. This energy also called geothermal energy. • The geothermal energy of the Earth's crust originates from the original formation of the planet (20%) and from radio active decay of materials (80%).
• Geothermal energy (from the Greek roots Geo, meaning earth, and thermos, meaning heat) is energy made by heat inside the Earth's crust.It's clean and sustainable.
Types of Geothermal Power Energy Plants • Direct Dry Steam. • Flash and Double Flash Cycle. • Binary Cycle.
• Direct Dry Steam: • Steam plants use hydro thermal fluids that are primarily steam. The steam goes directly to a turbine, which drives a generator that produces electricity. The steam eliminates the need to burn fossil fuels to run the turbine. (Also eliminating the need to transport and store fuels!)
Direct Dry Steam:
Flash and Double Flash Cycle: • Hydro thermal fluids above 360°F (182°C) can be used in flash plants to make electricity. • Fluid is sprayed into a tank held at a much lower pressure than the fluid, causing some of the fluid to rapidly vaporize, or "flash." The vapor then drives a turbine, which drives a generator.
Flash and Double Flash Cycle:
Binary Cycle: • Most geothermal areas contain moderatetemperature water (below 400°F). Energy is extracted from these fluids in binary-cycle power plants.
Binary Cycle:
Benefits of Geothermal Power Energy • • • •
Provides clean and safe energy using little land. Is renewable and sustainable. Generates continuous ,reliable “baseload” power. Conserves fossil fuels and contributes to diversity in energy sources. • Avoids importing and benefits local economies. • Offers modular, incremental development and village power to remote sites.
Advantages of Geothermal Power Energy • • • •
It is a renewable source of energy. By far, it is non-polluting and environment friendly. There is no wastage or generation of by-products. Geothermal energy can be used directly. In ancient times, people used this source of energy for heating homes, cooking, etc. • Maintenance cost of geothermal power plants is very less.
Disadvantages of Geothermal Power Energy • Only few sites have the potential of Geothermal Energy. • Total generation potential of this source is too small. • There is always a danger of eruption of volcano. • Installation cost of steam power plant is very high.
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