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-Dry steam power plants: steam released from pressure underground

-Flash steam power plants: hot water pumped to service, reduces pressure quickly to produce a blast of steam

-Binary cycle power plants: Used to get energy from geothermal reservoirs that are too cool to create steam. Water is pumped  to the surface and passes through a heat exchanger with a liquid with a lower boiling point than water. The heat from the water causes the other liquid to turn into steam, spinning the turbine.

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- Drawing fluids from deep earth to fuel geothermal power plants releases gases into the atmosphere, including CO2, H2S, CH4, and NH3

- CO2 and CH4 are greenhouse gases that contribute to global warming

- H2S, when released into the atmosphere, reacts to become SO2, which contributes to acid rain

- Land subsidence can occur as a result of pumping groundwater; this is an event in which the ground level sinks beneath the norm due to instability - increased seismic activity can also occur

- Chemicals used for geothermal power plants are generally pumped back into the earth, which stimulates production and reduces threats to the environment - to the effect of decreasing exposure - but this can create groundwater contamination

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-For the average high efficiency gas forced air heating system can be in the range of 92-94% efficient. Meaning every dollar spent purchasing energy, you would get 92- 94 cents worth of heat back

-A geothermal heat pump is measured in coefficient of performance (COP), meaning that if the heat pump is operating at COP 4.0 during a heating season it will provide 4 units of heat for each unit of energy consumed. For each dollar spent on energy, you will receive 4 dollars back.

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Sasha Rogalski

David Trombley

Zac Coleman

Joseph Wuori

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Hi

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http://www.youtube.com/watch?v=mCRDf7QxjDk

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-Almost emission free

-Scrubs sulfur

-No fuel required

-Limitless supply

-Can be built underground

-Available in most places