Boiler combustion efficiency is reduced by intermittent operation due to
- the energy loss in the flue gas - either by unburned fuel with the excess of fuel or by heating more air than necessary with the excess of air
- the radiation and convection loss from the exterior surface of the boiler
Energy loss due to radiation and convection increases with intermittent operation and reduced combustion time as indicated in the diagram below:
Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
The International Boiler and Pressure Vessel Code safety rules governing design, fabrication, and inspection of boilers and pressure vessels, and nuclear power plant components during construction.
Combustion gross and net calorific value.
Minimum area in a boiler room.
Classification of boilers according the ASME Boiler and Pressure Vessel Code.
Optimizing boilers efficiency is important to minimize fuel consumption and unwanted excess to the environment.
Stable and efficient combustion requires correct mixture of fuels and oxygen.
Properties like heat values, air/fuel ratios, flame speed, flame temperatures, ignition temperatures, flash points and flammability limits.