Evaluation of models for estimating solar irradiation on vertical surfaces at Valencia, Spain

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Solar Energy (Journal of Solar Energy Science and Engineering); (United States)

DOI:https://doi.org/10.1016/0038-092X(91)90082-8· OSTI ID:5964582

Utrillas, M P; Martinez-Lozano, J A; Casanovas, A J ^[1]

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1. Univ. de Valencia (Spain)

Hourly irradiation data recorded on vertical surfaces at north, east, south, and west orientations during the winter period going from December 1989 to March 1990 in Valencia, Spain, have been compared with estimated solar irradiation from several tilted-surface models. The isotropic-, Temps' and Coulson's-, Klucher's-, Hay's-, Shartveit's and Olseth's, Gueymard's-, and Perez' (simplified) models have been considered for this comparison. Root-mean-square-difference (RMSD), mean-bias-difference (MBD) and mean-absolute-difference (MAD) estimators have been used to measure the departure of models from experimental data. Modeled values are evaluated with the original coefficients proposed by the authors. Results of comparison show that the south orientation is less prone to modeling errors. Perez' 25{degree} circumsolar simplified model being the less affected by errors in north, eat and south orientations; for west orientation Klucher's model gives a lesser error. These results are consistent with those reported in previous studies.

• OSTI ID: 5964582
• Journal Information: Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Journal Name: Solar Energy (Journal of Solar Energy Science and Engineering); (United States) Vol. 47:3; ISSN SRENA; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140100* -- Solar Energy-- Resources & Availability
AVAILABILITY
COMPARATIVE EVALUATIONS
DEVELOPING COUNTRIES
ERRORS
EUROPE
EVALUATION
MATHEMATICAL MODELS
ORIENTATION
RADIATIONS
SOLAR RADIATION
SPAIN
STELLAR RADIATION