Siemens to upgrade Peruvian plant to combined cycle

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Siemens recently received an order to upgrade Santo Domingo de los Olleros, a simple cycle power plant in Peru, to combined cycle. The plant is near Lima, the capital of Peru, and the customer is Peru-based supplier Termochilca SA. The combined cycle conversion is likely to increase the power output by approximately 100 MW. The plant is scheduled to start commercial operation in early 2018.

Siemens will be responsible for full turnkey supply of the plant upgrade, including the engineering, procurement and construction of the combined cycle conversion. The main equipment to be supplied includes one SST-900 steam turbine, one SGen6-100A generator, a three-pressure heat recovery steam generator, and an air-cooled condenser. The air cooling is expected to enable the plant to use much less water.

The improved efficiency is expected to reduce the CO2 emissions per megawatt hour by 30 percent. The combined cycle plant offers an environmentally friendly solution to meet the growing power demand in Lima.


Siemens turned over the Santo Domingo de los Olleros simple cycle plant in 2013, after a construction time of 19 months. The plant is equipped with an SGT6-5000F gas turbine and currently has an overall installed rating of 200 MW. In the future, the waste heat from the gas turbine will be used to produce power using the additional steam turbine. With this, the power output is expected to increase up to 300 MW with efficiency over 55 percent.