AMIE Study Circle Blog

Boiler Efficiency Thermal efficiency of a boiler is defined as the percentage of heat input that is effectively utilized to generate steam. There are two methods of assessing boiler efficiency. Direct method: Where the energy gain of the working fluid (water and steam) is compared with the energy content of the boiler fuel.  Indirect or Loss method: Where the efficiency is the difference between the losses and the energy input. Join our WhatsApp Channel - The Indian Boiler Engineer for regular updates   Direct Method This is also known as 'input-output method' due to the fact that it needs only the useful output (steam) and the heat input (i.e. fuel) for evaluating the efficiency. This efficiency can be evaluated using the formula Boiler efficiency = (heat output/heat input) x 100   Parameters to be monitored for the calculation of boiler efficiency by direct method are : Quantity of steam generated per hour (Q) in kg/hr. Quantity of fuel used per hou...