KAJIAN PENGARUH TEKANAN EKSTRAKSI TURBIN LP TERHADAP EFISIENSI SISTEM PLTU

Improving the efficiency of the steam power plant system is needed to save fuel. One of methods to increase the efficiency of the power plant is by modifying the Rankine cycle. A Rankine cycle is modified by adding components reheater to reheat the high pressure turbine steam extraction (reheating) and preheater to early warming of the working fluid before it goes into the boiler (regenerative). This study was conducted by simulating the model of steam power plant and optimizing the steam turbine extraction pressure using Cycle Tempo 5.0. The optimization is performed in low pressure turbin, while the optimized parameter is entered extraction pressure on A1, A2, A3 and A4 low pressure feedwater heaters. Simulation result has been compared with deisign data and verified. Optimization result of low pressure turbine extraction pressure gives efficiency increase of 0.0181%. Steam power plant system can be said has been optimal because the effect of low pressure turbine extraction pressure variation on the efficiency does not provide a significant increase