What Form of Energy Converts Most Efficiently to Electrical Energy?

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Discussion Overview

The discussion centers on the efficiency of various forms of energy conversion to electrical energy, exploring different energy types and their conversion processes. Participants consider current technologies and their respective efficiencies.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that gas turbines have an efficiency of around 50%, while nuclear reactors and coal plants are around 30%.
  • Another participant mentions that hydrothermal energy might also be around 50% efficiency, but notes that wind and solar energy are more difficult to gauge due to factors like intermittency, with commercial photovoltaics cited as having around 10% efficiency.
  • It is proposed that the original poster (OP) might be interested in the types of energy (mechanical, chemical, thermal, radiant, etc.) rather than just the efficiency numbers.
  • A participant claims that chemical energy, particularly through fuel cells, should have the highest efficiency in conversion to electrical energy.

Areas of Agreement / Disagreement

Participants express varying views on which form of energy is most efficient for conversion to electrical energy, with no consensus reached on a definitive answer.

Contextual Notes

Participants mention specific efficiency numbers without clarifying the conditions under which these efficiencies apply, and there is an implicit assumption that the discussion is limited to current technologies.

Chrisistaken
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Hi,

I was wondeing if anyone could help me out here. What form of energy can most efficiently be converted to electrical energy (by current means)?

Cris
 
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I'd have to look around for more detail, but the efficiency of a gas turbine is around 50%. I think a nuclear reactor and coal plant are both around 30%. Hydrothermal is 50%, maybe? Wind is tough to gauge due to intermittency, solar is likewise, but commercial photovoltaics are 10%, IIRC.

Edit- you probably want to ask the engineers.
 
Those numbers sound reasonable, but maybe the OP is looking for types of energy, ie mechanical, chemical, thermal, radiant, etc. A normal heat engine based power plant converts chemical (or nuclear) to thermal to mechanical to electrical. A solar cell, radiant directly to electrical. But less efficiently than a heat engine based power plant.
 
Chemical energy should have the highest efficiency. Ex. fuel cells.
 

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