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Travel My Hometown In L. Subscriber Exclusive Content. Why are people so dang obsessed with Mars? How viruses shape our world. The era of greyhound racing in the U. See how people have imagined life on Mars through history. See More. United States Change. There are three main types of geothermal energy systems:.
Direct use and district heating systems use hot water from springs or reservoirs located near the surface of the earth. Ancient Roman, Chinese, and Native American cultures used hot mineral springs for bathing, cooking, and heating. Today, many hot springs are still used for bathing, and many people believe the hot, mineral-rich waters have health benefits.
Geothermal energy is also used to directly heat individual buildings and to heat multiple buildings with district heating systems. Hot water near the earth's surface is piped into buildings for heat. A district heating system provides heat for most of the buildings in Reykjavik, Iceland. Industrial applications of geothermal energy include food dehydration drying , gold mining, and milk pasteurizing. Geothermal power plants are generally built where geothermal reservoirs are located, within a mile or two of the earth's surface.
Click to enlarge. The United States leads the world in the amount of geothermal electricity generation. In , there were geothermal power plants in seven states, which produced about 17 billion kilowatthours kWh , equal to 0. In , 27 countries, including the United States, generated a total of about 83 billion kWh of electricity from geothermal energy.
Geothermal heat pumps use the constant temperatures near the surface of the earth to heat and cool buildings. Geothermal heat pumps transfer heat from the ground or water into buildings during the winter and reverse the process in the summer.
Geothermal explained Use of geothermal energy. What is energy? Units and calculators. Use of energy. Published by Madhumitha Jaganmohan , Aug 27, Regions with milder heat can be also be used, primarily for direct heating purposes. This heat energy is normally extracted from shallower depths. Dry rock formations between four to ten kilometers below the surface can also provide vast amounts of heat energy.
The United States has the largest installed nameplate capacity of geothermal energy in the world. California is home to the greatest number of geothermal plants and also houses the largest geothermal field — The Geysers — which is made up of 18 individual plants.
In , over 16 billion kilowatt hours of electricity were generated using geothermal sources in the United States.
This was more than in any other country worldwide. However, capacity additions have slowed in recent years. Costs for operating and maintaining geothermal power plants are some of the highest in the country when compared to other energy technologies.
The least expensive geothermal plant type still had annual fixed costs of Of the roughly , people employed at utilities , only a little over one thousand worked at geothermal stations. This text provides general information. Statista assumes no liability for the information given being complete or correct. Due to varying update cycles, statistics can display more up-to-date data than referenced in the text.
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