IMPROVED GEOTHERMAL POWER GENERATION PERFORMANCE BY INCREASING CONDENSER HEAT TRANSFER AREA

• Main Author: Abdul Rohman, Arif
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61851
• Institution: Institut Teknologi Bandung

Currently, almost all geothermal power plants in Indonesia use conventional direct contact condensers. Meanwhile, there is an advanced direct contact condenser, which is a conventional condenser with an additional heat transfer area known as structured packing or packing media. One of the geothermal power plants which uses this type of condenser is the Kamojang Unit IV. The addition of this area can affect the working pressure of the condenser so that for a constant mass flow and turbine inlet enthalpy, the turbine output power can be greater. This study aims to see how much influence the of heat transfer area on the performance of geothermal power plants. The method used in this study is comparing the results of calculating the performance of geothermal power plants using condensers without structured packing with those using structured packing. The data used in this study is data from one of geothermal power plant in Indonesia which uses a conventional condenser without structured packing. The data was processed using the GRG Nonlinear method in the Microsoft Excel Solver facility. The calculations performed are broken down into four Excel sheets. The first, second, third, and fourth sheets each has outputs; initial geothermal power plant performance, condensation heat transfer area in droplets, performance after increasing the heat transfer area of structured packing, and performance data for varying the additional area values. The results of calculations carried out in Solver Microsoft Excel show that with the additional heat transfer area inserted in the condenser, the performance value changes. Larger the value of the structured packing area shows higher the performance. The performance improvement is shown by decreasing condenser pressure, steam saturation temperature, and specific steam consumption (SSC) value, as well as increasing turbine output power.