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MEASUREMENTS OF THE ACTUAL EFFICIEN CY OF PV PANELS DEPENDING ON THEIR ORIENTATION AND ENVIRONMENTAL TEMPERATURE

Gendelis, S.; Heincis, D.; Telicko, J.
Abstract:
Polycrystalline photovoltaic (PV) panels of various orientations were installed in Riga, Latvia, for long-term monitoring and determination of the efficiency in real operation conditions depending on the environmental parameters. Results of the first couple of years of monitoring are summarised in this paper. Analysis of the available energy and environmental data allows for the quantitative estimation of actual efficiency depending on spatial orientation and following comparison with manufacturer?s values. The cloudiness that characterizes Riga's climate from October to January significantly reduces energy production. The temperature dependence of the PV module?s electrical efficiency is also clearly determined. The detailed data analysis indicated that the experimentally measured efficiency indicators for panels correlate well with the values that were determined for standard conditions. The energy produced during the winter months is determined to be less than 10% of the annual energy production. At the same time, the efficiency of PV modules (%) during the winter increases due to an increase in the open-circuit voltage in a solar cell. The interesting result is the impact of cloudiness on the solar radiation intensity over different years, resulting in high variations in produced energy for different years.
SGEM Research areas:
Year:
2021
Type of Publication:
In Proceedings
Keywords:
photovoltaic; PV panels; actual efficiency; energy; temperature dependence
Editor:
• Prof. DSc. Oleksandr Trofymchuk, UKRAINE • Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Volume:
21
SGEM Book title:
21st International Multidisciplinary Scientific GeoConference SGEM 2021
Book number:
6.2
SGEM Series:
SGEM International Multidisciplinary Scientific GeoConference
Pages:
75-82
Publisher address:
51 Al. Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
Period:
7 - 10 December, 2021
ISBN:
978-619-7603-36-1
ISSN:
1314-2704
Conference:
21st International Multidisciplinary Scientific GeoConference SGEM 2021, 7 - 10 December, 2021
DOI:
10.5593/sgem2021V/6.2/s26.13
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