Geothermal Energy
description
Transcript of Geothermal Energy
![Page 1: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/1.jpg)
Geothermal Energy
Presented by: William MurrayMarch 28, 2007
![Page 2: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/2.jpg)
What is Geothermal Energy?
• Defined: Energy that is generated by converting hot water or steam from deep beneath the Earth’s surface into electricity.
• Unique renewable• Natural Energy Flow
– Heat Mining– Enthalpy
![Page 3: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/3.jpg)
The Heat Source• Tiny quantities of radioactive isotopes
liberate heat as they decay• Core heat transfer through convection• Accessible in locations where heats
interior is brought within reach– Lithospheric Plates
• Significant heat flow• Volcanic activity
![Page 4: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/4.jpg)
![Page 5: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/5.jpg)
![Page 6: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/6.jpg)
![Page 7: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/7.jpg)
The Heat Source Cont’d• High enthalpy systems are divided
into two categories– Vapor Dominated
• Best and most productive• Free of liquids
– Liquid Dominated• Relies on water at boiling point• Often results in steam “flash”
• Two-phase zone
![Page 8: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/8.jpg)
Geothermal Potential• Nature of the resource
– Fluid Temperature– Salinity– Fluid Pressure– Gas Content
• Economies of Scale• Maximum efficiency
![Page 9: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/9.jpg)
Four Main Types• Dry steam power plant• Single flash steam power plant• Binary cycle power plant• Double flash power plant
![Page 10: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/10.jpg)
Dry Steam Power Plant
![Page 11: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/11.jpg)
Single/Double Flash Steam
![Page 12: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/12.jpg)
Binary Cycle Power Plant
![Page 13: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/13.jpg)
Ground Source Heat Pump
![Page 14: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/14.jpg)
Global Capacity• Worldwide use of geothermal 9.3GW
– 28 GW used directly for heating– 100GWt through ground-source heat
pumps• Potential for 65-138GW• MIT claims 100GWe by 2050• 0.3% of US energy consumption
![Page 15: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/15.jpg)
Environmental Impact• Gaseous emissions
– Less than 1/10th of coal-fired carbon emissions
– Dissolved gasses• Land use • Noise• Potential ground subsidence
![Page 16: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/16.jpg)
Geothermal Usage• Iceland generates 26.5% of energy from geothermal
– .1% Fossil fuels– 73% Hydro
• In the US– Alaska (1 Plant)– California (4.8% of electrical energy, 2.4GW installed
capacity)– Hawaii (30MW on largest island, 20% of electrical energy)– Nevada(15 plants, 254MW)– Utah (reconstructed developing plants)
![Page 17: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/17.jpg)
![Page 18: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/18.jpg)
Applications in Belize• Belize is the only country in Central
America that does not have the potential for geothermal energy according to the US Department of Energy
![Page 19: Geothermal Energy](https://reader035.fdocuments.in/reader035/viewer/2022062218/56815e0f550346895dcc7023/html5/thumbnails/19.jpg)
QUESTIONS?!!