How efficient is coal at producing electricity?

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Jayda Osinski asked a question: How efficient is coal at producing electricity?
Asked By: Jayda Osinski
Date created: Mon, Feb 1, 2021 6:18 AM
Date updated: Sat, Jun 25, 2022 4:26 AM

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Top best answers to the question «How efficient is coal at producing electricity»

  • Coal based power accounts for almost 41 % of the world’s electricity generation. Coal fired power plants operate on the modified Rankine thermodynamic cycle.The efficiency is dictated by the parameters of this thermodynamic cycle. The overall coal plant efficiency ranges from 32 % to 42 %.

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Coal based power accounts for almost 41 % of the world’s electricity generation. Coal fired power plants operate on the modified Rankine thermodynamic cycle.The efficiency is dictated by the parameters of this thermodynamic cycle. The overall coal plant efficiency ranges from 32 % to 42 %.

Taking into account the typical efficiency of electricity generating plant of 35% and 10% Joule heating losses in the distribution grid, the efficiency of converting primary energy into light energy is only 0.7% For comparison, a compact fluorescent lamp (CFL) produces between 50 and 60 lumens per Watt.

By the end of 2019, U.S. coal-generating capacity totaled 229 GW. The coal fleet’s rate of operation, or utilization, has also decreased. The U.S. coal fleet generated as much as 67% of its capacity in 2010, based on the operating capacity at the time. Coal’s utilization rate has declined since then, and in 2019, it fell to 48%.

Because wind cannot dispatch power in response to demand, the electricity it produces is less valuable, and its cost should not be compared directly against dispatchable resources like coal, nuclear power, or natural gas without serious caveats or significant adjustments to factor in the cost of battery storage.

In a DCFC, electricity is generated directly from coal through the chemical oxidation of coal which has been ground and purified of ash and other contaminants. This technology is widely promoted as being able to generate electricity with much higher thermal efficiencies (~70-80%) than engines and turbines (~35-55%).

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