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Explicit empirical relation for the monthly average cell‐temperature performance ratio of photovoltaic arrays
Author(s) -
Franghiadakis Y.,
Tzanetakis P.
Publication year - 2006
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.680
Subject(s) - latitude , irradiance , photovoltaic system , relation (database) , wind speed , interval (graph theory) , solar irradiance , meteorology , mathematics , atmospheric sciences , air temperature , empirical modelling , environmental science , statistics , econometrics , computer science , geodesy , data mining , geography , geology , physics , combinatorics , simulation , engineering , optics , electrical engineering
An empirical relation is derived that allows accurate estimates of the influence of cell temperature variations on the output of a photovoltaic array. Monthly average cell‐temperature performance ratios, PR T , can be calculated from the latitude of the site and monthly average values of solar irradiance, air temperature and wind speed. The derivation of the empirical relation for PR T is based on intermediate empirical relations and approximations established by the analysis of a database from stations located at various latitudes and having diverse climatic characteristics. The accuracy of the relation is tested against PR T calculations from short‐interval data available in the database. Copyright © 2006 John Wiley & Sons, Ltd.