What is the boiler efficiency formula?

The formula for boiler efficiency is essential in assessing how well a boiler converts fuel into usable energy. The correct formula is based on the relationship between output energy (useful energy produced by the boiler) and input energy (energy supplied to the boiler from the fuel).

Using the formula Efficiency (%) = (Output energy / Input energy) x 100 shows that efficiency is determined by taking the ratio of useful output energy to total input energy, which is then converted into a percentage by multiplying by 100. This illustrates how effectively the boiler is operating; a higher percentage indicates that more of the energy input is being converted into useful work or heat output.

This understanding emphasizes energy conservation and operational effectiveness in power engineering. The other options do not correctly reflect the principle of efficiency calculation in a way that assesses the useful output against the total input, hence they do not convey the proper means of evaluating boiler performance.