Janani Posted April 26, 2016 Share Posted April 26, 2016 Hi,I have done a comparison on gain over tracker plane radiation for a horizontal single axis east-west tracker between 'with back tracking' and 'without back tracking'.in the case of 'with back tracking', the radiation gain on collector plane is 18.3% over Global Horizontal Irradiation(GHI) and for the case of 'without backtracking', gain is 27.7% over GHI.As per PVsyst report, the Near shading loss for 'without backtracking' case is 9.9%, out of which 5.6% accounts to beam loss and the rest to diffuse and albedo.Similarly for 'with backtracking' case, the Near shading loss is 3% which is due to diffuse and albedo (almost same as 'without backtracking' case).My question is , if shading due to beam component is adjusted in 'with backtracking' case, the net gain on collector plane over GHI should be (27.7-5.6) equal to around 22%, but PVsyst report shows only 18.3% gain over GHI.Kindly clarify which parameter makes the difference in gain on collector plane over GHI between 'with back tracking' and 'without backtracking'. Link to comment Share on other sites More sharing options...
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