Details
| Original language | English |
|---|---|
| Pages (from-to) | 1567-1575 |
| Number of pages | 9 |
| Journal | IEEE journal of photovoltaics |
| Volume | 12 |
| Issue number | 6 |
| Publication status | Published - 26 Sept 2022 |
Abstract
The calculation of the irradiance of vertically mounted building-integrated PV modules is less accurate than for PV modules that are mounted with tilt angles of less than <inline-formula><tex-math notation="LaTeX">$50^{\circ}$</tex-math></inline-formula>. The irradiance reflected from the ground is more relevant for vertically mounted PV modules, since the influence of ground reflection also increases with increasing module tilt angle. We compare five models that calculate the diffuse horizontal irradiance from the given global horizontal irradiance and then transpose the diffuse horizontal irradiance to the irradiance on the vertical plane facing south. We present a ground view factor with which we calculate the insolation reflected from the ground onto a PV module and compare these results with the established method for calculating ground reflection. Using our approach and measured global and diffuse horizontal irradiation, we calculate the global vertical irradiance for a 12-month period. We compare the results with the measured global vertical irradiance. By using the ground view factor, we reduce the deviation between the measurement and the calculation of the cumulative insolation at the façade by up to 9.4% compared with the irradiance calculated using established methods for ground reflectance after this 12-month period.
Keywords
- Building-integrated PV, Buildings, Data models, ground view factor, irradiation, Mathematical models, Radiation effects, Solar energy, Sun, Test facilities, transposition models, vertically mounted PV
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE journal of photovoltaics, Vol. 12, No. 6, 26.09.2022, p. 1567-1575.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Improved Calculation of the Power Gain of Vertical PV Modules due to Ground Reflection Using the Ground View Factor
AU - Gewohn, Timo
AU - Bredemeier, Dennis
AU - Schinke, Carsten
AU - Lim, Bianca
AU - Brendel, Rolf
PY - 2022/9/26
Y1 - 2022/9/26
N2 - The calculation of the irradiance of vertically mounted building-integrated PV modules is less accurate than for PV modules that are mounted with tilt angles of less than $50^{\circ}$. The irradiance reflected from the ground is more relevant for vertically mounted PV modules, since the influence of ground reflection also increases with increasing module tilt angle. We compare five models that calculate the diffuse horizontal irradiance from the given global horizontal irradiance and then transpose the diffuse horizontal irradiance to the irradiance on the vertical plane facing south. We present a ground view factor with which we calculate the insolation reflected from the ground onto a PV module and compare these results with the established method for calculating ground reflection. Using our approach and measured global and diffuse horizontal irradiation, we calculate the global vertical irradiance for a 12-month period. We compare the results with the measured global vertical irradiance. By using the ground view factor, we reduce the deviation between the measurement and the calculation of the cumulative insolation at the façade by up to 9.4% compared with the irradiance calculated using established methods for ground reflectance after this 12-month period.
AB - The calculation of the irradiance of vertically mounted building-integrated PV modules is less accurate than for PV modules that are mounted with tilt angles of less than $50^{\circ}$. The irradiance reflected from the ground is more relevant for vertically mounted PV modules, since the influence of ground reflection also increases with increasing module tilt angle. We compare five models that calculate the diffuse horizontal irradiance from the given global horizontal irradiance and then transpose the diffuse horizontal irradiance to the irradiance on the vertical plane facing south. We present a ground view factor with which we calculate the insolation reflected from the ground onto a PV module and compare these results with the established method for calculating ground reflection. Using our approach and measured global and diffuse horizontal irradiation, we calculate the global vertical irradiance for a 12-month period. We compare the results with the measured global vertical irradiance. By using the ground view factor, we reduce the deviation between the measurement and the calculation of the cumulative insolation at the façade by up to 9.4% compared with the irradiance calculated using established methods for ground reflectance after this 12-month period.
KW - Building-integrated PV
KW - Buildings
KW - Data models
KW - ground view factor
KW - irradiation
KW - Mathematical models
KW - Radiation effects
KW - Solar energy
KW - Sun
KW - Test facilities
KW - transposition models
KW - vertically mounted PV
UR - http://www.scopus.com/inward/record.url?scp=85139494443&partnerID=8YFLogxK
U2 - 10.1109/JPHOTOV.2022.3207312
DO - 10.1109/JPHOTOV.2022.3207312
M3 - Article
AN - SCOPUS:85139494443
VL - 12
SP - 1567
EP - 1575
JO - IEEE journal of photovoltaics
JF - IEEE journal of photovoltaics
SN - 2156-3381
IS - 6
ER -