Experimental determination of energy and exergy efficiency
of the solar parabolic-cooker
Hasan H€useyin € Ozt€urk
Faculty of Agriculture, Department of Agricultural Machinery, University of C ukurova, 01330 Adana, Turkey
2003
Mini Summary
Energy efficiency = ratio of energy output (increase in water temp due to temp growth) and energy input (energy of solar radiation)
Exergy = maximum useful work to bring a heat system into equilibrium
Instant measurement of energy efficiency = ratio of increased water energy to energy of solar radiation.
Conclusions:
Exergy output is always greater than energy output
Common fact exergy efficicentcy = low in SC's
Improvements could be made in:
Playing with radiation properties of surfaces exchanging heat , playing with geometries of parabolic cookers, playing with driving dimensions, adding fins on cooker surface.
Playing with absorption of cooking pot and reflective properties of SC reflectors
Dimensions can be reduced with a better reflective surface.
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