Home Discussion Forum Why cant we harvest the heat of the centre of the earth...

Why cant we harvest the heat of the centre of the earth as energy?

Heat of the centre of the earth, im sure theres a term for it… something beginning with ‘G’ i think Geothermal maybe
and Maybe we do! I heard in Iceland/greenland they use this heat to melt ice off footpath to prevent people slipping
but can we use that heat and convert into other energy similar to solar power
hell why cant we place a satellite near the sun to harvest that energy?
please give me a detailed answer any short ones are spam


  1. I’m not quite sure about this, but the rock in some of the inner layers of the earth is pretty hard to get through, and no machine has ever gone to the core of the earth.
    If you meant the actual heat, then yes, we already harvest it. It’s called Geothermal energy, like you said before. It’s not commonly used, because the machinery used to harvest that heat is expensive.

  2. We do.
    Iceland develops most of their electric power from geothermal plants.
    And there are other plants around the world.
    solar satellites are an old theme, they have been advocated for decades. The problem is getting the stuff up there, and problems getting the energy back to earth. Microwaves to a antenna farm on earth are one proposal, but that has problems.

  3. Iceland uses geothermal energy for most, if not all of its energy. The problem is it can only be accessed in certain places — Iceland, Yellowstone National Park. Digging into the earth’s core is technologically impossible, and volcanos are too hazardous a source. Eruptions and extreme heat wipe out any equipment we need to utilize the energy.

  4. In most places around the world you would have to drill down for miles just to get to a place hot enough to boil water. Then you would have to install piping, and massive pumps to get the water back to the surface. The logistics of creating a system like that are just to expensive to carry out in most locations.
    Another thing to consider is that the heat and pressure at those depths would cause massive wear on the machinery and would have to be replaced often.
    Geothermal power is only used when it is cost effective and the sorce of power is close to the surface of the earth.

  5. My short answers aren’t spam. They might be sarcastic, however.
    About 6 feet down, the average temp. is about 57 degrees year round. That’s enough to use a heat pump to bring heat up into a house in the winter – or to absorb heat, and cool a house in the summer. It’s done all the time.
    As to a satellite near the sun – how are you going to get the energy from the satellite to the earth? That’s a long way for an extension cord.

  6. Geothermal is the right term; in some places, we do use geothermal energy–the problem with it is that this form of energy is very geography-dependent. In places where the heat from the center of the earth vents out on the earth’s surface, such as geysers. A heat vent ideal for energy conversion is stable and predictable, and releases a lot of energy–this just doesn’t happen in most places. Where geothermal energy is available and efficient (such as The Geysers, in California), we use it; even so, it makes up for less than 1% of our global energy consumption. An analogy to wind power and tidal power is appropriate; both of these energy sources are excellent where available, and environmentally friendly. But they aren’t available everywhere. Check out Wikipedia (Geothermal Energy) for two paragraphs on advantages and disadvantages.
    As for your question about sending a satellite to the sun to harvest solar energy: if we sent a satellite closer to the sun, it would be able to collect solar energy more efficiently, but problems would arise in two areas. First, even though the satellite solar cell might be more efficient, it won’t necessarily provide more energy than a larger, less efficient solar cell here on earth. Sending a solar cell large enough to solve our energy problems towards the sun would cost a lot of money and use a lot of energy in itself.
    The second problem is transporting the energy back to earth. If the satellite was very far away from earth, it would have a difficult time transmitting the energy back to earth efficiently. Solar power systems in orbit around the earth have been proposed as practical solutions, however, a lot of the sun’s energy is absorbed by the atmosphere by the time it reaches the earth. These systems suggest using microwave radiation to transport the energy from orbiting satellites to power centers on earth. However, such a network of solar cells would be costly to maintain and, as it turns out, not that much better than using solar cells on the ground. The best achievements in solar cell technology (at least in the near future) will be improvements in technology rather than location.
    One more thing about geothermal power. A geothermal power plant is essentially a heat engine. In thermodynamics, there is something called the Carnot cycle, which is used to predict the maximum theoretical efficiency of a heat engine (it is about 40%). Therefore, because geothermal energy comes from heat, a geothermal power plant can be at best 40% efficient.

  7. In Iceland geothermal energy is used quite a lot. Hot water is taken from the ground and used to heat houses, greenhouses, swimming pools and for normal hot water consumption. Geothermal energy is also used to make electricity. In Iceland there is a power plant where steam from the ground is used to produce electricity. Most of Iceland’s electricity comes from hydraulic power plants though (where the force of water is used to make electricity).
    A lot of research is being done on geothermal energy and there are constant experiments and development in the field. As far as I know Iceland is a pioneer in this, but some other countries are working on something similar.
    You can find more information about Iceland’s geothermal resources on this website: http://www.energy.rochester.edu/is/reyk/


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