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The power generation capability will be provided by two 15 MW power plants, comprised of 2 x 18 MW steam boilers and 2 x 18 MW steamturbines. These are standard power technology units, widely used around the world.

The boilers will use stoker-grate technology, which is a robust design suitable for PNG conditions.
Each boiler will provide enough steam for an 18 MW steam turbine, this is about 75 tonnes of steam per hour at a high pressure of 1300 psig and temperature 500°C. Each 18 MW boiler will consume up to 20 tonnes per hour of wood as fuel – this is about one truckload of wood per hour. The power plant will keep several months of fuel on site to ensure continuous power supply. Each 18 MW boiler unit will be about two to three stories tall.

While the output from the steam turbine generator set is 18 MW, about 3 MW of electricity are used to run each power plant and process the wood into chips, so each 18 MW boiler and steam turbine set will export a net 15 MW to the grid.

Machinery

Typical steam turbine (Photo Courtesy of Siemens)

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