A grid-connected solar thermal power plant, with a capacity of 1 MWe at direct normal incidence (DNI) radiation of 600 W/m2, has been designed and commissioned at Gurgaon near New Delhi by IIT Bombay as a part of the project titled 'Development of a Megawatt-scale Solar Thermal Power Testing, Simulation and Research Facility', sponsored by the Ministry of New and Renewable Energy, Government of India. The unique feature of the plant is the integration of two different solar fields (parabolic trough collectors and linear Fresnel reflectors) without a fossil fuel backup. The plant intends to combine the advantages of synthetic oil based parabolic trough collector (PTC) field and direct steam generation (DSG) of linear Fresnel reflector (LFR) field. The hot oil from PTC field and saturated steam from LFR field are integrated to produce superheated steam at 350°C, 42 bar to run a turbine-generator to produce electricity.
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