How do you calculate boiler heat rate?

Boiler heat rate is a measure of how efficient a boiler is at converting fuel into heat. It is defined as the heat input to the boiler in Btu per hour divided by the net steam output in pounds per hour.

To calculate boiler heat rate, you will need to know the following information:

- Heat input: This is the rate at which energy, typically in the form of fuel, is supplied to the boiler. Measured in BTU/hr.

- Net steam output: This is the difference between the total steam generated by the boiler and the amount of saturated steam used in the boiler (steam trap and desuperheater)

The formula for calculating boiler heat rate is:

Boiler heat rate (Btu/hr/lb) = Heat input(Btu/hr)/ Net steam output (lb/hr)

For example, a boiler with a heat input of 50,000 Btu/hr and a net steam output of 1000 lb/hr would have a boiler heat rate of 50,000 Btu/hr / 1000 lb/hr = 50 Btu/lb

Boiler heat rate is an important performance indicator for boilers because it can be used to:

Compare boilers to other boilers and identify the most efficient model

Track boiler performance over time and identify any deviations from the original efficiency rating. Monitor boiler performance and identify opportunities for energy savings