Analysis of Boiler Engine Efficiency Unit 2 PT. PJB UP Paiton

Abstract

Abstract The boiler machine is a component that initiates energy changes. The boiler engine in the PLTU is a closed vessel that can convert water into steam at high temperature and high pressure by utilizing heat from coal combustion. Steam flows out of the boiler engine into the steam turbine. In this turbine, there is a conversion of kinetic energy from steam into mechanical energy to drive the turbine blades. The rotation of the turbine shaft is coupled with the generator to produce electrical energy from the conversion of the magnetic field coil in the generator. The purpose of this study is to determine the efficiency of a boiler engine and to find out the best method for calculating the efficiency of a boiler engine. There are two methods used to calculate the efficiency of boiler machine, namely the direct method and the indirect method or losses method. In the direct method uses a comparison between the output (steam) and heat input (fuel) for efficiency evaluation. Meanwhile, the indirect method is done by reducing the heat generated when burning coal with losses that occur during and after the combustion process. Based on the data analyzed to determine the efficiency of the boiler machine by direct method, it can be seen that the efficiency is 87.20%. Meanwhile, based on the indirect method, the efficiency is 81.22%. These results are appropriate after being compared with boiler commissioning data in 1994 that efficiency of the boiler machine at PT. PJB UP Paiton reaches 80% - 90%.