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Statistical validation of daylength definitions for estimation of global solar radiation in Toledo, Spain
Cita
Almorox Alonso, Javier 
ORCID: https://orcid.org/0000-0003-1523-0979, Hontoria Fernández, Chiquinquirá ORCID: https://orcid.org/0000-0002-8089-0327 and Benito Capa, Marta ORCID: https://orcid.org/0000-0001-6664-1642
(2004).
Statistical validation of daylength definitions for estimation of global solar radiation in Toledo, Spain.
"Energy Conversion and Management", v. 46
;
pp. 1465-1471.
ISSN 0196-8904.
https://doi.org/10.1016/j.enconman.2004.07.007.
ORCID: https://orcid.org/0000-0003-1523-0979, Hontoria Fernández, Chiquinquirá ORCID: https://orcid.org/0000-0002-8089-0327 and Benito Capa, Marta ORCID: https://orcid.org/0000-0001-6664-1642
(2004).
Statistical validation of daylength definitions for estimation of global solar radiation in Toledo, Spain.
"Energy Conversion and Management", v. 46
;
pp. 1465-1471.
ISSN 0196-8904.
https://doi.org/10.1016/j.enconman.2004.07.007.
Descripción
| Título: | Statistical validation of daylength definitions for estimation of global solar radiation in Toledo, Spain |
|---|---|
| Autor/es: |
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| Tipo de Documento: | Artículo |
| Título de Revista/Publicación: | Energy Conversion and Management |
| Fecha: | 25 Septiembre 2004 |
| ISSN: | 0196-8904 |
| Volumen: | 46 |
| Materias: | |
| ODS: | |
| Palabras Clave Informales: | Angstrom–Prescott equation; Daylength calculation; Sunshine duration; Twilight; Toledo (Spain) |
| Escuela: | E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM) |
| Departamento: | Producción Agraria |
| Licencias Creative Commons: | Reconocimiento - Sin obra derivada - No comercial |
Resumen
The different daylength calculation procedures that can be employed to estimate solar radiation using an Angstrom-Prescott regression have not been sufficiently evaluated. In this study, daily global solar radiation data measured in Toledo (Spain) during the period 1986-1995 were used to test five daylength estimation models using different definitions of sunrise/sunset and twilight. Models were compared using the root mean square error (RMSE), the mean bias error (MBE) and the t-statistic. In the first two cases, the differences found between the results from the different models were small. Analysis using the t-statistic, on the other hand, showed that the use of civil twilight to calculate daylength produced the best estimates of global solar radiation for Toledo.
Más información
| ID de Registro: | 91733 |
|---|---|
| Identificador DC: | https://oa.upm.es/91733/ |
| Identificador OAI: | oai:oa.upm.es:91733 |
| URL Portal Científico: | https://portalcientifico.upm.es/es/ipublic/item/5480917 |
| Identificador DOI: | 10.1016/j.enconman.2004.07.007 |
| URL Oficial: | https://www.sciencedirect.com/science/article/pii/... |
| Depositado por: | iMarina Portal Científico |
| Depositado el: | 04 Nov 2025 17:07 |
| Ultima Modificación: | 04 Nov 2025 17:07 |
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