Canadian scientists have developed a brand new solution to measure the vitality yield of a bifacial PV system. They are saying they take into consideration the spectral albedo of floor cowl akin to snow and sand to foretell vitality good points of as much as 2%, in comparison with the Worldwide Electrotechnical Fee (IEC) commonplace.
Researchers from the College of Ottawa’s Sunlab laboratory have developed a brand new solution to measure the vitality yield of bifacial PV programs. The innovation is meant to enhance the Worldwide Electrotechnical Fee (IEC) measurement commonplace launched in 2019.
The brand new scaled rear irradiance (SRI) methodology is alleged to enhance IEC measurements by accommodating the consequences of various floor covers on spectral albedo in its calculation of the rear-side irradiance of bifacial programs.
To show the idea, the scientists modeled the manufacturing of a bifacial silicon heterojunction (HJT) photo voltaic module beneath the IEC bifacial illumination approach and the SRI methodology. They mounted the system on a horizontal single-axis tracker 1.22 meters off the bottom in Boulder, Colorado, United States. Thought-about floor covers are soil, purple brick, inexperienced grass, roof shingles, concrete, sand, dry grass, and snow.
The outcomes present that for a rear irradiance of 200 W/sq. meters, the IEC measurement doesn’t distinguish between the completely different land covers, overestimating the bifacial acquire between 14% and 1.4% for all floor cowl apart from snow. The SRI methodology, however, reveals a transparent distinction between completely different working situations.
“The implementation of this methodology to worldwide requirements for such panels could make predictions of out of doors bifacial panel efficiency inside 2% of absolute,” mentioned researcher Erin Tonita.
The brand new methodology can even predict vitality yield good points in places apart from Boulder with an error of lower than 7%, in accordance with the teachers.
The innovation can be utilized to match completely different bifacial applied sciences and enhance system efficiency by optimizing land cover-specific design, the authors say. They share their findings in “A common illumination methodology to foretell the efficiency of bifacial photovoltaic programs,” which was lately revealed in Joule.
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