Two bidirectional meters, including a main meter and check meter, located at the substation of Muara Laboh power plant, will be used to measure the quantity of net electricity to be supplied by the project to the Sumatera grid. A 30-year power purchase agreement was signed in March 2012. Perusahaan Listrik Negara (PLN), the Indonesian state-owned electricity utility, will purchase the power generated by the Muara Laboh geothermal power project. Offtake of electricity generated by the Muara Laboh project The steam passing through the turbine will be condensed and re-injected into the reservoir. Any further water present in the steam is separated in a separator (brine), before passing through the turbine. After passing through scrubbers, the steam will be directed to the steam turbine that is coupled to the generator. Steam produced using the heat from the geothermal wells will be separated from the water-dominated resource through ‘flashing’ in steam separators. “The renewable energy project will not only provide sustainable long-term electricity to the Sumatra grid but will also avoid significant quantities of greenhouse emissions.” Power generation from the Indonesian geothermal project The exploration drilling programme encompassing six wells (ML -A1, ML-B1, ML-C1, ML-E1, ML-H1 and ML-H2) was completed by the end of 2013, while well monitoring, data evaluation and reserve calculation were performed in 2014. It is to be developed in three phases, with the first stage including the development of 70MW. The plant will consist of two turbines of 110MW each, coupled with a generator to produce electricity from steam. Under this programme, approximately 4,500MW of energy is proposed to be generated from geothermal resources. The geothermal project is a part of the second fast-track programme launched by the Government of Indonesia in 2010 to develop 10,000MW of new generating capacity. Muara Laboh geothermal power plant make-up The renewable energy project will not only provide sustainable long-term electricity to the Sumatra grid but will also avoid significant quantities of greenhouse emissions produced when fossil fuels are used to generate the same amount of electricity.
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