Intermittent Combustion and Boiler Efficiency
Efficiency reduction due to intermittent boiler operation.
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:
Related Topics
-
Combustion
Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.
Related Documents
-
ASME - International Boiler and Pressure Vessel Code
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. -
Boiler - Efficiency
Combustion gross and net calorific value. -
Boiler Rooms - Sizing
Minimum area in a boiler room. -
Boilers - Classification
Classification of boilers according the ASME Boiler and Pressure Vessel Code. -
Combustion Efficiency and Excess Air
Optimizing boilers efficiency is important to minimize fuel consumption and unwanted excess to the environment. -
Optimal Combustion Processes - Fuel vs. Excess Air
Stable and efficient combustion requires correct mixture of fuels and oxygen. -
Paraffins and Alkanes - Combustion Properties
Properties like heat values, air/fuel ratios, flame speed, flame temperatures, ignition temperatures, flash points and flammability limits.