... ins by d t a w l = d t a i n + 2 t t a w l , d t a e x = d t a w l + 2 t i n s The optical efficiency of the PTC is defined as the ratio of the power absorbed by the evaporator to the solar power impinging on the aperture area...

... Flamant. 31 12 2012 16 12 2013 Evacuated receivers used with parabolic trough solar collectors can be characterized in terms of their heat loss and optical efficiency. The optical efficiency is the ratio of the energy collected to the incident solar radiation when operating at ambient...

... with a geometrical concentration ratio of 2.5 in terms of actual acceptance angle, optical efficiency and optical concentration ratio. 18 04 2011 07 11 2011 01 03 2012 06 03 2012 lens-walled CPC half acceptance angle concentration ratio optical efficiency PVs are the simplest...

.... dish∕Stirling system EuroDish performance analysis optical efficiency thermodynamic efficiency flux mapping energy balance solar energy concentrators Stirling engines thermodynamics thermoelectric conversion 21 09 2006 10 09 2007 28 12 2007 2008 American Society...