@thesis{thesis, author={Prayudi Prayudi and RAMADHAN PAJRI and Sudirmanto Sudirmanto}, title ={ANALISA EFISIENSI BOILER DENGAN METODE HEAT LOSS SEBELUM DAN SESUDAH OVERHAUL UNIT 3 PLTU LONTAR}, year={2016}, url={http://156.67.221.169/334/}, abstract={One of the main components of the power plant is boiler. Boiler serves to produce steam at high pressures and temperatures required to drive a steam turbine generator to produce electricity. Occurred in the boiler combustion and heat transfer processes, one of the things that affect the efficiency of the boiler. In this paper, the calculation and analysis of the efficiency of the power plant boiler unit 3 Lontar includes the analysis of the calculation results before and after the overhaul, which the analysis will be elaborated based on the method of heat loss, so it can be concluded after comparisons. Based on the calculation, boiler efficiency before overhaul amounted to 82.87% and after the overhaul amounted to 83.80%, which means an increase in efficiency is 0.93%. where the factors that can increase the efficiency of the boiler is one of the activities carried out such inspections overhaul of Air pre-heater, Air heater element laundering etc, besides the element content of coal used as fuel also affects the efficiency of the boiler.} }