m Shahnazari Sany - Department of Mechannical Engineering,Sari Branch,Islamic Azad University,Iran
d.d GANJI - Department of Mechannical Engineering,Sari Branch,Islamic Azad University,Iran
m Abbasi - Department of Mechannical Engineering,Sari Branch,Islamic Azad University,Iran

The mentioned thermal may be provided by natural gas combustion (mazut or gasoline), solid coal, and uranium. Thermal transferring in boiling tank is done by 3 main methods, but the methods effectiveness percentage is different in various boiling tanks according to different performances. each factor leads to reduce each thermal efficiency or boiling tank reduction. the increase in sediment in boiling tank tubes espacially in water tube has a great role in reduction of thermal flux from tube wall to fluid that leads to certain reduction of boiling tank efficiency. the operational and practical aspects of this research was done by maple software. Finally, boiling tank efficiency is calculated in different width of sediment in boiling tank. In addition, the role of different widths of sediments in reduction of thermal efficiency of boiling tank is studied and resisting ways are suggested

Boiler efficiency, water tube, maple, heat flux, sediment