Boiler eciency is called to some extent of total thermal energy which can be recovered
from the fuel. Boiler eciency losses are due to four major factors: Dry gas flux, the latent heat of
steam in the flue gas, the combustion loss or the loss of unburned fuel, and radiation and convection
losses. In this research, the thermal behavior of boilers in gas refinery facilities is studied and their
eciency and their losses are calculated. The main part of this research is comprised of analyzing
the e ect of various parameters on eciency such as excess air, fuel moisture, air humidity, fuel and
air temperature, the temperature of combustion gases, and thermal value of the fuel. Based on the
obtained results, it is possible to analyze and make recommendations for optimizing boilers in the
gas refinery complex using response-surface method (RSM).
