# Frequent question: What makes a power plant efficiency?

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To express the efficiency of a generator or power plant as a percentage, divide the equivalent Btu content of a kWh of electricity (3,412 Btu) by the heat rate. For example, if the heat rate is 10,500 Btu, the efficiency is 33%. If the heat rate is 7,500 Btu, the efficiency is 45%.

## What makes a power plant efficient?

A major efficiency goal for fossil-fueled plants is heat rate improvement. The fewer Btus it takes to generate a kilowatt-hour of power, the less fuel is used, and the more money that flows to the bottom line.

## What power plant is most efficient?

Guinness World Records has named the Chubu Electric Nishi-Nagoya power plant Block-1 in Japan — powered by GE’s 7HA gas turbine — the world’s most efficient combined-cycle power plant, based on achieving 63.08 percent gross efficiency.

## What is the efficiency of an electric power plant?

Typical thermal efficiency for utility-scale electrical generators is around 37% for coal and oil-fired plants, and 56 – 60% (LEV) for combined-cycle gas-fired plants. Plants designed to achieve peak efficiency while operating at capacity will be less efficient when operating off-design (i.e. temperatures too low.)

## What is the average efficiency of a power plant?

Figures from the World Coal Association, a keen advocate of HELE, show that the average efficiency of coal-fired power plants around the world today is 33 percent. Modern state-of-the-art plants can achieve rates of 45 percent, while “off-the-shelf” rates are around 40 percent.

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## What is the efficiency steam turbine power plant?

The efficiency of a conventional steam-electric power plant, defined as energy produced by the plant divided by the heating value of the fuel consumed by it, is typically 33 to 48%, limited as all heat engines are by the laws of thermodynamics (See: Carnot cycle).

## Why are power plants not efficient?

Some input energy is lost during electricity generation as well as other processes such as when vehicles burn gasoline. The technology and the type of fuel used to generate electricity affect the efficiency of power plants.