Performance Investigation of Fire Tube Boiler

This paper basically deals with the analysis carried out on fire tube boiler which is generally used in small scale industry and is a low pressure or low capacity boiler. In this the horizontal three pass fire tube boiler is used boiler. The performance comparison of the efficiencies and heat losses by the fire tube boiler is done by preparing the heat balance sheet. The performance is tested by making use of two different fuels. The fuels used are Indian lignite coal and rice husk. From the calculation it is seen that the efficiency obtain from the Indian lignite coal is less as compared to the rice husk, which has higher efficiency than lignite coal used. It is observed that higher the ash and moisture content the efficiency obtain is lower. It is also seen that the calorific value also plays an important role in increasing the efficiency of the boiler, higher the calorific value higher the efficiency. It seen that the various heat losses also affect the efficiencies of the fire tube boiler. This heat losses must not be neglected.