The power plant is being developed by PT Geo Dipa Energi, Indonesia's state-owned geothermal energy company and is scheduled to start commercial operation in March 2021.

The 10MW-class, small-scale geothermal power plant will be constructed in the Dieng plateau and located near the existing Dieng geothermal power plant, Unit 1, which has been operating since 2002.

For this new power plant, Toshiba ESS will supply its Geoportable, which is a compact power generation system developed for small scale geothermal power plants with outputs ranging from 1MW to 20MW. The system employs advanced technologies, for instance, leading-edge corrosive gas resistance materials, which are crucial for geothermal steam turbines, and a unique design for the steam path, which leads to high performance and reliability.

In addition, with its compact design, Geoportable can be installed even in limited spaces where conventional geothermal power generation systems normally cannot fit. Geoportable is primarily composed of standardised components and is pre-assembled on a skid in the factory, allowing a shorter manufacturing and installation period.

Takao Konishi, director and senior vice president, Power Systems Division at Toshiba ESS, commented: "We can offer a wide range of geothermal power generation systems from 1MW to 200MW. In Indonesia, Toshiba ESS has supplied large-scale geothermal power generation systems with an aggregate output of 239MW for the Sarulla geothermal power plant, the largest geothermal power plant in Indonesia, and the Patuha geothermal power plant. With this new opportunity, we will promote Geoportable in addition to the large-scale type and continue to contribute to realising a stable power supply in Indonesia by providing our cutting-edge power generation system that realises customer needs."