Atlanta-based GE Energy has signed contracts worth about $20 million to upgrade and maintain gas turbines at a power plant in Mersin, Turkey.

The plant, owned by Istanbul-based Camis Elektrik Uretim A.S., utilizes two GE turbines that capture emissions from other gas-powered engines to produce steam, which can be used to generate more electricity.

The GE Frame 9E Gas Turbines at the Mersin plant produce 125 megawatts of power each.

GE Energy will upgrade the older of the two turbines, which was installed in 2006, to boost its output 2.3 percent. The company also signed a 10-year contract to maintain the second turbine, installed in 2009.

GE Energy has targeted Turkey as a rapidly expanding energy market. A company report released Feb. 28 said Turkish demand for electricity grew 8 percent in 2011 and is projected to increase at an average of 6 percent each year until 2018.

GE Energy is a division of Fairfield, Conn.-based conglomerate General Electric Co.