DESIGN AND ECONOMIC ANALYSIS OF GEOTHERMAL DIRECT USE SYSTEM IN MATALOKO, NUSA TENGGARA TIMUR

• Main Author: Lazuardy, Yuzar
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62129
• Institution: Institut Teknologi Bandung

The case study of this final project comes from a feasibility study project for geothermal direct use which conducted by PT Rigsis Energi Indonesia in Mataloko, Nusa Tenggara Timur. This study was conducted to fulfill request from the United Nations Development Programme (UNDP) which aims to support the Sustainable Development Goals (SDG) and transition to the use of renewable energy by Indonesia Government. From the study results, the selected utilization application is for drying arabica coffee beans. In this final project, a system consisting of tray dryer, shell and tube heat exchanger and blower is designed to be able to dry 500 kg of arabica coffee beans per batch. The brine temperature which is still quite high from one of the wells of local power plant can be used to heat the drying air before being reinjected into the ground. Subsequently, an economic analysis is carried out to estimate capital costs, operational and maintenance costs, economic benefits, and the feasibility of the designed system. The results of the designed system will be in the form of specifications of each component and process flow diagrams of the designed system. The results of the economic feasibility analysis show that this system is estimated to have an NPV of Rp450,000,000 with an IRR of 16%, so it can be concluded that the designed system is feasible to be implemented. This system is also estimated to reduce the duration of drying and save costs incurred by local coffee farmers.