Geothermal Energy Dong Kim Chemical Engineering Energy Technology

Geothermal Energy Dong Kim Chemical Engineering Energy Technology and Policy

What is Geothermal Energy? o o Utilize temperature of the earth’s core. Direct use: District Heating System Electricity generation Heat pumps

Locations o o o Ring of Fire Over 20 countries: Iceland, U. S. , Italy, France, China, Japan, ect. The United States is the country with the greatest geothermal energy production

Direct District Heating System o o Use hot water from springs or reservoirs near the surface. Hot water near the earth's surface can be piped directly into buildings and industries for heat.

Electricity Generation o Dry Steam Power Plant: Uses the superheated, pressurized steam (180° 350°C)

Electricity Generation o Flash Steam Power Plant: use hot water above 182°C (360°F) from geothermal reservoirs.

Electricity Generation o Binary Cycle Power Plant: n n Insufficiently hot resource to efficiently produce steam Too many chemical impurities to allow flashing.

Heat Pumps o o Utilizes constant temperature of upper 10 feet of the Earth’s surface. Similar to ordinary heat pumps, but they rely on more stable source than air.

Geothermal Energy o o Almost no negative impact on the environment. Release about 1 to 3 percent of the carbon dioxide emissions of a fossil fuel plant.

References o o o o 1: http: //www. worldbook. com/wb/images/content_spotlig ht/earth/insideearth. jpg 2: http: //en. wikipedia. org/wiki/Image: Pacific_Ring_of_Fire. png 3: http: //en. wikipedia. org/wiki/Image: 2005 -08 -30 -district -heating-pipeline. jpg 4: http: //www. geothermal. nau. edu/about/generation. shtml 5: http: //www. inhabitat. com/images/steamystuff 2. jpg http: //www. eia. doe. gov/kids/energyfacts/sources/renew able/geothermal. html 6: http: //en. wikipedia. org/wiki/Geothermal_power#_note. USGeo