Search NASA⌕ Search
Home/Archive/DOE OSTI

DOE OSTI · 1823790

Measuring Irradiance for Bifacial PV Systems

Gostein, Michael·Ayala Pelaez, Silvana (ORCID:000000030180728X)·Deline, Chris (ORCID:0000000298678930)·Habte, Aron·Hansen, Clifford W.·Marion, Bill·Newmiller, Jeff·Sengupta, Manajit (ORCID:0000000156224503)·Stein, Joshua S.·Suez, Itai
View original source ↗Export metadata ↓

Abstract

The advent of bifacial PV systems drives new requirements for irradiance measurement at PV projects for monitoring and assessment purposes. While there are several approaches, there is still no uniform guidance for what irradiance parameters to measure and for the optimal selection and placement of irradiance sensors at bifacial arrays. Standards are emerging to address these topics but are not yet available. In this paper we review approaches to bifacial irradiance monitoring which are being discussed in the research literature and pursued in early systems, to provide a preliminary guide and framework for developers planning bifacial projects.

Explore related subjects

bifacialirradiance measurementperformance analysisphotovoltaic systemsSOLAR ENERGY

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Gostein, Michael, Ayala Pelaez, Silvana (ORCID:000000030180728X), Deline, Chris (ORCID:0000000298678930), Habte, Aron, Hansen, Clifford W., Marion, Bill, Newmiller, Jeff, Sengupta, Manajit (ORCID:0000000156224503), Stein, Joshua S., Suez, Itai. 2021-08-26. Measuring Irradiance for Bifacial PV Systems. https://doi.org/10.1109/pvsc43889.2021.9518601

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

DOE OSTI2024

Validating Irradiance Models for High-Latitude Vertical Bifacial Photovoltaic Systems

Bifacial photovoltaic systems oriented vertically facing east-west are an emerging design, targeting production in morning and afternoon hours and providing competitive annual energy yield to traditional south-tilted modules for high latitude locations. The accuracy of existing bifacial PV models when modules are oriented vertically has yet to be examined in detail. Here, we compare four bifacial PV irradiance models in ~150 locations between 15-80 degrees N on the utility-scale, finding higher inter-model deviations for vertical PV systems than south-tilted across all latitudes less than 75 degrees N. We validate model-predicted irradiance with test-site data collected in Golden, Colorado and Fairbanks, Alaska for E-W vertical and south-tilted arrays. View factor models agree with E-W vertical test-site data in Golden with RMSE=15%. Modelling error increases for the Alaskan test-site to RMSE values between 21-30%, driven in part by high albedo measurement uncertainty during snowy months.

bifacial↗
DOE OSTI2024

Bifacial PV: De Tudo um Pouco

A tecnologia fotovoltaica evolui constantemente, e desde aproximadamente 2017 os modulos bifaciais chegaram para ficar. A mudanca, que foi simples em termos de fabricacao das celulas PERC, oferece um grande ganho na producao de energia. E por isso que agora representam 75% das novas usinas centralizadas dos Estados Unidos. Nesta palestra, vou apresentar a pesquisa de PV bifacial no NREL, onde temos um campo de 75 kW com 5 tecnologias bifaciais comerciais ao lado dos equivalentes monofaciais (mesmas celulas), com dados open-source desde 2019. Vou falar sobre o que estamos observando em relacao a performance, degradacao, o posicionamento dos sensores de irradiacao, sombreamento e efeitos de borda (edge effects). Para terminar, apresentarei nova pesquisa sobre a otimizacao do albedo e agriPV, e compartilharei novidades nas ferramentas de modelagem bifacial e AgriPV desenvolvidas pelo NREL.

bifacial↗