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Geothermal
Includes questions related to generating electricity through the use of naturally occuring heat sources.
981 Questions
What is the source of geothermal energy?
The interior of the Earth is at a very high temperature. That heat from the core is the ultimate source of geothermal energy.
When the Earth was formed 4.8 billion years ago, the core was mostly molten iron and nickle. The energy to heat the core came from the gravitational energy present at the time of formation. Since then, additional heat energy has been added through nuclear decay of uranium and other heavy materials which were also included in the original formation process.
What are some strengths of geothermal?
Geothermal energy is considered a renewable energy source. Which means that, unlike the fossil fuels we rely on for energy, we can continue to use geothermal without having to be concerned that we will run out of energy.
In terms of electricity generation, a geothermal power plant will emit only about 1% of the carbon dioxide that a fossil fuel powered plant would produce to generate the same amount of electricity. Although this may not be as good as solar or wind powered forms of electricity generation, geothermal does have the advantage of being able to produce a steady supply of electricity 24/7, something that most renewable energy sources can't.
What harmful geothermal waste products are there?
The waster products from Geothermal are limited to the waste produced by the initial production of the systems (heats pumps, piping, fuel in drilling) but mainly in the electric energy required to run the pumps as they function. The information I found indicates that it takes about 1KW of electricity to produce 4 to 5 KW of heat energy. (about 13,000 BTU). so calculating what the waste of pollution is requires knowing what source produces your electricity. There should be no other waste from a properly functioning system. Leaking glycol is the other thing I could think of but propylene glycol is used in food production and is quite benign.
Explain why Mexico uses geothermal energy?
Located atop three tectonic plates (North American, Pacific and Cocos Plates), Mexico is one of the most geologically active regions of Earth. This has resulted in a varied topography, which includes the three Sierra Madre mountain ranges, the Mexican Altiplano and the flat lands around the Yucatan Peninsula.
Due to this high volcanic and tectonic activity, nowadays Mexico is the 4th largest producer of geothermal energy in the world, with 1017 MW of installed capacity (2015), accounting for 3% of the national electricity production.
Does geothermal not require a generator to produce electricity?
Geothermal does require a generator.
In one method, geothermal energy arrives at the power station in the form of super-hot water coming up through a pipe from deep in the ground. The superheated water is allowed to evaporate, then the high-pressure steam is used to turn electrical generators.
Other geothermal systems use dry steam directly from underground to spin the turbines. A third system, called Binary, uses a second process to transfer the heat to another medium which then turns the generators.
Does geothermal energy help fix pollution?
Yes. Geothermal energy is clean and renewable, so it decreases the use of fossil fuels and reduces CO2 emissions.
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Geothermal energy.
Geothermal gradient is the rate of increasing temperature with respect to an increasing depth in the Earth's interior. It is approximately 25 degrees Celsius per kilometer of depth.
What purposes does geothermal energy provide?
Geothermal power can be used in our homes as air-conditioners and heaters. It is renewable as the Earth is constantly making heat.
How is geothermal energy stored in the source and how is released?
Geothermal energy is typically stored just below the Earth's surface. It is released when people dig down into the Earth and use it's heat energy to cool down or warm up homes.
What is geothermal energy used for?
Geothermal energy captures the heat from deep under the ground and uses it to produce electricity. This electricity is added to the grid and is sold to consumers.
Geothermal energy is also used in domestic situations to warm or cool individual buildings.
A:First of all, you have the geothermal heat pump; this is where you are going to have three levels of geothermal. Geothermal heat pumps are pretty much used for heating and cooling. So that can be in any heating and cooling application that you can think of. That could include snow melting where pipes are buried in concrete slabs. There are some applications around where we have greenhouses that use the hot water directly for heating. There is an agricultural application, which is fish farming. There have been uses of crop drying, like tomato drying and garlic and onion drying. Some people are using a geothermal heat to produce ethanol and bio-fuels. There are all kinds of processes like that; any process that uses high temperature of heat, say below 200 Fahrenheit. When we get above that, we can use geothermal power plants to drive turbines to make electricity.How much does a TiVo system cost?
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Why does a geothermal power station not need cooling towers?
Because the excess steam is condensed into water and and goes back underwater where it is reheated for later use.
What does geothermal do for the environment?
Because geothermal systems work with nature, not against it, they minimize the threats of acid rain, air pollution and the greenhouse effect. An environmentally friendly fluid is used in the closed, continuous loop.
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Geothermal systems are highly efficient.
The only outside energy required is for components of the geothermal unit. Half of the energy from the sun that hits the earth every day is absorbed by the ground. The result is that the ground remains at a constant temperature of between 10 and 15 Degrees C all year round at a depth of six feet below the surface. A NextEnergy system is able to capture this energy and put it to use. A geothermal system consists of a geothermal unit, generally located in the basement of a house, which is connected to a Ground Loop that is buried in the earth. Water circulating through the loop pipe absorbs the heat from the ground and takes it back into the house. The geothermal unit transfers the heat to air that is drawn through the unit and blows the warm air around the house using standard air ducts. Alternatively, the heat is distributed through pipes containing water for infloor heating. In the summer, the process reverses. Heat is taken from the air in the house and put in the ground, which is now cooler than the air.
What energy source uses heat from the underground?
Geo-thermal power plants pump water (usually) deep down underground where it gets turned into steam. The steam then comes up another drill hole where it is used to generate electricity. The steam is then cooled into water again and is pumped down again in a never-ending cycle.
This is free, clean, green renewable energy.
How can you increase the use of geothermal energy?
no it cant, because it is from the sun, and we cant control the suns heat
What is used in geothermal heat pumps to harness geothermal energy?
A geothermal heat pump uses the constant below ground temperature of soil or water to heat and cool a home or building. Because a geothermal system relies on this constant temperature of the earth rather than outside air temperatures, the system is highly efficient. Generally, the ground temperature is warmer than the air above it during the winter and cooler than the air in the summer.
Geothermal heat pumps (GHPs) take advantage of the differences between below ground and above air temperatures by exchanging heat with the earth through something called a ground heat exchanger. Depending on the type of heat pump, geothermal energy can be used to heat and cool a home as well as supply a home with hot water.
There are several types of geothermal systems. "Closed loop" systems circulate an antifreeze solution through a closed loop which is usually made of plastic tubing. This closed loop can be buried in the ground or submerged in water. A heat exchanger transfers heat between the refrigerant in the heat pump and the antifreeze solution in the closed loop. The loop can be configured horizontally, vertically, or coiled far enough below a pond or lake to avoid freezing.
An open loop system uses well or surface body water as the heat exchange fluid that circulates directly through the GHP system. The water circulates through the system, picking up or discharging heat as it goes.
A hybrid approach, which may be preferable in areas requiring more cooling than heating, may combine both options.
According to the U.S. Department of Energy, though the installation price of a geothermal system can be several times higher than that of a conventional air-source system, the return on investment can be significant. Some systems may pay for themselves in reduced conventional energy bills in 5 to 10 years.
Drilling through the Earth to reach areas hot enough to create steam is possible, but very expensive and difficult.
Why can't Geothermal energy be used in all areas?
"Geothermal" is a term applied to two different kinds of energy. One is energy derived from the internal heat of the Earth. The other is derived from energy that can be pumped out of the earth or water by a heat pump.
Geothermal energy derived from internal energy of the Earth could, in theory, be done anywhere. A limiting factor is the depth of the well that has to be drilled to get to the heat. In some places, such as at hot springs, drilling is not necessary. In others, the well would have to go too deep to be practical.
Geothermal from a natural heat sink with a heat pump is impractical where the local ground and/or water is too cold to be useful. Certainly an ice field or permafrost is not a practical source of heat. The limit might be considered to be an area where the heat source is 40 degrees F., 9 degrees C. or above. There are other factors; for example movement in water makes it a better heat source than rock, unless the rock is permeable and has groundwater flowing through it.
