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The Changing Energy MixA Systematic Comparison of Renewable and Nonrenewable Energy$
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Paul F. Meier

Print publication date: 2020

Print ISBN-13: 9780190098391

Published to Oxford Scholarship Online: February 2021

DOI: 10.1093/oso/9780190098391.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 15 June 2021

Geothermal

Geothermal

A Renewable Energy Type

Chapter:
(p.363) 10 Geothermal
Source:
The Changing Energy Mix
Author(s):

Paul F. Meier

Publisher:
Oxford University Press
DOI:10.1093/oso/9780190098391.003.0011

Geothermal energy is heat taken from below the surface of the earth in the form of either steam or hot water. This energy can be used to generate electricity, but also has use in heating and cooling homes and some direct uses, such as gold mining, food dehydration, and milk pasteurizing. There are four basic types of geothermal power plants including steam, flash, binary, and enhanced geothermal system (EGS). The first three rely on permeable aquifers that have water flowing through them such that hot water or steam can be extracted. EGS, however, extracts heat from deep in the earth by injecting water and creating artificial fractures in the rock. A great deal of the world’s potential for geothermal energy exists in the so-called Ring of Fire, a ring of volcanoes around the Pacific Ocean.

Keywords:   direct dry steam plant, flash plant, binary plant, enhanced geothermal system, ring of fire, geothermal heat pump, seismic activity

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