Advanced ray tracing to predict the energy yield of bifacial systems with reduced uncertainty - Creek Renewables and PV Lighthouse

www.pvlighthouse.com.au Premium PV software Slide 1 Applying advanced ray tracing to predict the energy yield of bifacial systems with reduced uncertainty PV ModuleTech 2018 Keith McIntosh, Malcolm Abbott and – how rapidly, easily, and accurately the effects can be simulated. Today’s talk A major advance in simulation that enables us to answer this questions.www.pvlighthouse.com.au Premium PV software Slide 4 Systems investigated Bifacial. 1D tracking, NS axis One-high 1981. NREL Solar Radiation Research Laboratory SRRL Baseline Measurement System BMS; Golden, Colorado Data; NREL Report No. DA-5500- 56488. http//dx.doi.org/10.5439/1052221www.pvlighthouse.com.au Premium PV software Slide 7 Challenge 2 Spectral variability Solar spectrum changes throughout day A. Andreas, T. Stoffel; 1981. NREL Solar Radiation Research Laboratory SRRL Baseline Measurement System BMS; Golden, Colorado Data; NREL Report No. DA-5500- 56488. http//dx.doi.org/10.5439/1052221www.pvlighthouse.com.au Premium PV software Slide 8 Challenge 2 Spectral variability Solar spectrum changes throughout day – 0.1 for two-high system. Greater loss on diffuse days. Mismatch loss due to non-uniform illumination in modulewww.pvlighthouse.com.au Premium PV software Slide 29 Evaluate different system configurationswww.pvlighthouse.com.au Premium PV software Slide 30 Accuracy of predicting daily yield Global intensity Non-uniformity in module T amb wind Direct intensity Spectral dependencies Uncertainty      0     11.4  18.4 For our location, albedo, module system configuration, we define accuracy of daily yield prediction. Spectral dependencies have the greatest influence. Uncertainty to 95 confidence.www.pvlighthouse.com.au Premium PV software Slide 31 It can be done Annual yield solved by ray tracing to micron-level, accounting for – Spectral variability of direct and diffuse light, – Spectral and angular dependencies of ground, torque-tube and module, – Mismatch within a module due to non-uniform illumination. Solutions currently 45 mins per configuration. Future 5mins. Results allow us to quantify advantages – system configurations, – module features, – simulation assumptions. Is it worth accounting for spectral variability mismatch due to non-uniformity Early days, but yes, it looks that way. Summarywww.pvlighthouse.com.au Premium PV software Slide 32 www.pvlighthouse.com.au WeChat B7282628 Thank you