IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v17y1999i3p311-317.html
   My bibliography  Save this article

An anisotropic shadow ring correction method for the horizontal diffuse irradiance measurements

Author

Listed:
  • Vartiainen, Eero

Abstract

Diffuse irradiance is usually measured with a shadow ring which prevents beam radiation from entering the measuring instrument. The shadow ring also obscures part of the sky, and therefore, it is necessary to correct the measured diffuse irradiance. This correction is often assumed to be constant at a certain time of the year and at a certain latitude. However, the radiance distribution of the sky is not isotropic, and the anisotropy must be taken into account in the correction. In this paper, a new numerical method for calculating the shadow ring correction is presented. The correction factor is calculated directly from the radiance distribution of the sky. For Helsinki latitude (60°N), the yearly average isotropic correction factor is 1.10 and the additional anisotropic correction factor is about 1.05. Realistic sky models, e.g. Perez all-weather model, were used in the calculation.

Suggested Citation

  • Vartiainen, Eero, 1999. "An anisotropic shadow ring correction method for the horizontal diffuse irradiance measurements," Renewable Energy, Elsevier, vol. 17(3), pages 311-317.
    • Handle: RePEc:eee:renene:v:17:y:1999:i:3:p:311-317
    DOI: 10.1016/S0960-1481(98)00756-3
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148198007563
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/S0960-1481(98)00756-3?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Dal Pai, Alexandre & Escobedo, João Francisco & Dal Pai, Enzo & de Oliveira, Amauri Pereira & Soares, Jacyra Ramos & Codato, Georgia, 2016. "MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover," Renewable Energy, Elsevier, vol. 99(C), pages 754-763.
    2. Haiying Cheng & Xuan Zhang & Ziqian Chen & Wenhong Sun & Kaiyan He & Hongfei Zheng & Yanxiu Tang, 2022. "Theoretical Investigations on Shadow Band Correction Factors for Diffuse Radiation under Isotropic Conditions without Approximation," Energies, MDPI, vol. 15(19), pages 1-25, September.
    3. Vartiainen, Eero, 2000. "A comparison of luminous efficacy models with illuminance and irradiance measurements," Renewable Energy, Elsevier, vol. 20(3), pages 265-277.
    4. Rodríguez-Muñoz, J.M. & Monetta, A. & Alonso-Suárez, R. & Bove, I. & Abal, G., 2021. "Correction methods for shadow-band diffuse irradiance measurements: assessing the impact of local adaptation," Renewable Energy, Elsevier, vol. 178(C), pages 830-844.
    5. Vartiainen, Eero, 2000. "A new approach to estimating the diffuse irradiance on inclined surfaces," Renewable Energy, Elsevier, vol. 20(1), pages 45-64.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:17:y:1999:i:3:p:311-317. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.