A Model of System Improvement for Electricity Cogeneration Sugar Factories

Abstract

This study is a model development of mass and energy balance of steam and electricity cogeneration for sugar mills. This program runs on Microsoft Excel and was developed to operate in various conditions relating to production and investment. The purpose is to narrow down the overall analysis of steam and electricity generation and increase accuracy. Study results show the use of this model displays similar results in comparison to the actual data recorded in the factory. The actual steam condition was running steam flow rate of 170 ton/hr at 105 bar, 520˚C

The power plant produce the resulted of 431.3 kW/ton bagasse and the simulated result was 441.4 kW/ton bagasse. Based on the comparison between the model and the actual process, it can be conclude that this model can be applied with various operating conditions. For the capital investment, conditions at 540˚C with the pressure of 90 bar and 105 bar provide the optimal value. The result found that the payback periods are 5.32 and 5.34 years, and internal rates of return are 24.25% and 24.20%, respectively.