The plant is designed to combine photovoltaic (PV) and thermo-solar (TS) electric generation. In particular, the starting point is the use of cooled photovoltaic modules. Cooling enhances the photovoltaic module efficiency, and the cooling fluid can be exploited in a Rankine cycle, producing further power. However, the cooling water temperature at the exit of PV system is rather low (55°C). Thus, since the Rankine cycle efficiency is strongly dependent on the temperature level, a set of thermal solar modules is added, in order to raise the maximum cycle temperature. According to Millennium data sheet, using relatively low cost flat thermal modules, we can attain 135°C as maximum cycle temperature. Thermal storage is obviously required in order to stabilize the thermal cycle temperatures.
Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2009: Biofuels, Renewable Energy, Coatings, Fluidics and Compact Modeling
Published: May 3, 2009
Pages: 149 - 151
Industry sector: Energy & Sustainability
Topics: Solar Technologies