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How to integrate renewable energy sources and conventional fuels into the electrical gridKerem Metin, Vice Chairman, Investments and Operations, Metcap Energy Investments050 RESPONSIBLE ENERGY

Metcap Energy Investments, a firm believer in meeting the world's future challenges over energy, water resources and food supplies now, has been working to develop an energy production scheme which will not only optimise the use of natural resources, but will also maximise its economic output from the perspective of the project's feasibility and the country's benefits.Understanding and applying concepts such as flexibility, efficiency, water conservation and environmental impact, Metcap is developing a totally integrated electric plant in Karaman, Turkey. Part of it will look like a conventional combined-cycle gas plant, in which the natural gas is burned in a jet engine that drives a generator and the exhaust gases are used to make steam to turn a steam turbine that also drives a generator. But standing nearby is a 250-foot tower surrounded by nearly 250,000 mirrors, each about the size of a big flat-screen television. Computers keep the mirrors focused on the tower, and inside the tower, water is boiled into steam. The steam flows into the turbine along with steam from the natural gas plant.In broad outline, using the sun to boil water into steam and supplementing that with natural gas is not new. But most such projects use parabolic troughs with black pipes running down the centre. The tower design allows steam to be heated to temperatures 200 degrees higher than the troughs, which means that the system will produce far more electricity per acre. The design is rather modest on the renewables side; the plan is for 1000 megawatts of natural gas, 50 megawatts of solar power and 22 megawatts of wind power. The technology turns a natural gas plant and a solar plant into conjoined twins; wind is more like a ? Pictured below: from left to right: Kerem Metin, Vice Chairman of Investments and Operations, Metcap Energy InvestmentsMete Maltepe, General Manager of GE Energy Turkey, Paul Browning, President and CEO of Thermal Products, GE Ricardo Cordoba, President of GE Energy for Western Europe and Northern AfricaDr Celal Metin, Chairman of Met Group of CompaniesPictured below right: Operating Modes for the plantRESPONSIBLE ENERGY 051