Heat Rate Losses Simulation for Coal Fired Steam Power Plant at South Sumatra-V Cfspp using Dynamic System

Abstract

Until 2017, coal still dominates up to 58.3% of the energy mix in Indonesia. Based on the 2027 projection for Sumatra Island, the composition of electricity production with coal primary energy will increase to 43.9% from the previous 37.7% [1]. By considering the principle of regional balance, the contribution of electricity needs in Sumatra Island mostly will be supplied from the coal fired steam power plant. One of important parameter in determining the efficiency of a power plant is the value of Heat Rate. In this study, it is consists of three subsystems, namely boiler, coal, and feed water. Dynamic System method is used to create a model that can represent the heat rate real system because its variables which influence the value are dynamic, complex and integrated one to another. The simulation results from modeling are useful for improvement process to predict the heat rate value in future periods. It is also describe which one will be the significant variables in heat rate system in order to reduce the operational costs. As the final results, it is predicted the total cost of heat rate losses will increase from 21,175 USD in the last 12 months to 38,851.9 USD for the next 36 months. The biggest cost in heat rate losses is the coal subsystem, which is 8,000 – 31,000 USD. Followed by boiler subsystem which is 12,000 – 18,000 USD and feed water subsystem is 1–15 USD. Coal moisture which contributes as the highest value losses in the heat rate losses system should be the main focus for South Sumatra-V management in making policies.