| Abstract |
Collaborative research between local government and Institute Technology of Bandung had been undertaken in two years to delineate the prospective areas for Geothermal District where direct use geothermal resource is applicable. The final aim of this project is to optimize the geothermal potential both indirectly and directly in West Java Province - Indonesia. In the first year, data inventory to identify geothermal potential were conducted. The information comprises of geosciences data (geological, geochemistry and geophysical data, developed and undeveloped geothermal prospects, and existing geothermal power plants) and non-geosciences data (spatial use and government regulation). The results show that the Province has a total potential Geothermal Energy about 5311 MWe. From this number, 705 MWe is generated by four geothermal power plants (Kamojang-140 MW, Gunung Salak-330 MW, Darajat 125 MW and Wayang Windu-110 MW), 185 MW are proven reserve from three prospects that are waiting to be developed up to the year 2008. In the second year, works were focused on the delineation of geothermal district and economic valuation of direct use geothermal project in this district. The data from first year works are then use to delineate Geothermal District, that consist of (1) Conservation (2) Cultivation and (3) Production area. Four geothermal power plants above were selected and furthermore ranked based on (1) existing industry as market, (2) type of reservoir that produce water for direct geothermal use and (3) preserve forest that limits the district development. This assessment results Wayang Windu as the most prospective area for Geothermal District Pilot Project. In agreement with government business investment strategy, which stated that agribusiness is one of core business in this district, Malabar tea factory (MTF), near by Wayang Windu, is evaluated for application of direct use to replace Industrial Diesel Oil (IDO) used for tea leaves withering and drying. Economic evaluations are conducted using Net Present Value (NPV) cash flow to compare energy usage between geothermal energy and IDO. Three scenarios are modeled, and the NPV for every scenario has been proved to reduce the cost as follow (1) Scenario if all the capital cost paid by the MTF can reduce up to US$ 409,448, (2) Scenario if Pipelines Investment Paid by Energy Seller, can reduce the cost up to US$ 513,131 and (3) Scenario if Geothermal Fluid Considered as Waste can reduce up to US$ 1,622,862 for 20 years project life. In summary, this paper describes the preparedness of local government in implementing the direct use geothermal energy and the expectation of contribution from foreign and domestic investor to develop a sustainable energy industry in one solid geothermal conservation area. Finally, one of the above scenarios could be realized with reasonable agreement between the investor, local government, National Electricity Company (PLN) and geothermal company operator. |