Janani Posted September 7, 2019 Share Posted September 7, 2019 Hi,We have actual measured GHI data from site and actual tracker gain obtained from it.When the same GHI data was imported in PVsyst, it showed a higher tracker gain than the measured. We understand that one reason is the diffused content variation between actual & estimated which affects tracker gain. The differences are tabulated below. Actual at site PVsyst Prediction for the same GHIMonth GHI (kWh/m2/d) Tilt radiation (kWh/m2/d) Radiation gain on tracker plane (%) Tilt radiation (kWh/m2/d) Radiation gain on tracker plane (%)Jan 5.23 6.15 17.59% 6.55 25.15%Feb 5.49 6.46 17.67% 6.79 23.60%Mar 6.31 7.27 15.21% 7.88 24.84%Apr 6.19 7.03 13.57% 7.60 22.78%May 5.97 6.84 14.57% 7.23 21.04%Jun 5.35 6.05 13.08% 6.36 18.94%Jul 4.7 5.19 10.43% 5.55 17.98%Aug 4.27 4.65 8.90% 5.04 18.08%Pl clarify whether PVsyst team has done any comparison of actual gain vs PVsyst estimation for trackers and has done any validation of the inbuilt tracking algorithm .Pl note, the parameters such as tracking angle, pitch and orientation were maintained same as per site conditionThank You Link to comment Share on other sites More sharing options...
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