Optimization of Combustion Efficiency in Indirect Water Bath Heaters of Ardabil City Gate Stations

Energy consumption in heaters of city gate stations is consid erable and high quality refined gas is used for combustion in these heaters. Due to the ascendant rate of fuel cost and also environmental laws; analysis, redesign, renovation and maintenance of indirect water bath heaters is of paramount importance. Because of high amount of oxygen or fuel entered into combustion chamber of the heaters as well as high temperature of stack, these heaters usually work in a low efficiently. This could be due to a low performance of burner, an inappropriate control of combustion air and an incorrect size of the heaters. Finding a proper way to control

the combustion and to improve the efficiency in heaters of city gate stations located at Arjestan (a city of Iran in Ardabil province)

is the main purpose of this study. By adjusting the length of flame proportional to the combustion chamber, control of air/fuel ratio and installation of a barometric damper, 10% increase in combustion efficiency and 30% increase in overall efficiency of heaters are obtained