Kholagi et al.model

Provide information on global and diffuse solar irradiance in Yemen Arab Republic (YAR) in preparation for solar energy utilization, which is now recognized as a possible solution to the energy problems in remote areas in Yemen.

Solar energyGlobal solar radiation model

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Contributor(s)
Initial contribute: 2021-09-07

Authorship

  • A. KHOGAL
  • M. R. I. RAMADA
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    Classification(s)

    ● Application-focused categoriesNatural-perspectiveAtmospheric regions
    ● Application-focused categoriesIntegrated-perspectiveGlobal scale

    Detailed Description

    English {{currentDetailLanguage}} English

    Quoted from:A. Khogali, M. R. I. Ramadan, Z. E. H. Ali, and Y. A. Fattah, “Global and diffffuse solar irradiance in Yemen (Y.A.R.),” Solar Energy, vol. 31, no. 1, pp. 55–62, 1983.

    https://www.sci-hub.ren/10.1155/2013/168048

    Abstract

    Measurements of global and diffuse solar irradiance on a horizontal surface were made at Sana'a University during 1980/81 and the results are presented. Use is made of these results and other meteorological data to examine some of the methods of prediction of global solar irradiance/t and of diffuse solar irradiance Ha. The regression coefficients of the Angstrom correlation relation and the zone parameter of an empirical relation due to Barbaro et al. are determined for Sana'a. The results are extended to compute H at five other stations and comparison is made with the available data. The computed and measured values of/t are in good agreement. The monthl)~ variation of/~ and the effects of latitude and altitude on the regression coefficients and on the clearliness index HIHo are discussed. 

    INTRODUCTION

    Knowledge of global solar irradiance at a site is essential for the proper design and assessment of flat plate types of solar energy conversion systems. Some of the systems such as concentrating systems require information on direct beam component whereas in the case of tilted plain surfaces the diffuse component of solar irradiance is also important for the computation of system performance.

    The aim of this study is to provide information on global and diffuse solar irradiance in Yemen Arab Republic (YAR) in preparation for solar energy utilization, which is now recognized as a possible solution to the energy problems in remote areas in Yemen. 

     

    Methods

    Kholagi et al. obtained the following linear equations from the data measured at three difffferent stations in Yemen:
    \( 𝐻/𝐻_0 = 0.191 + 0.571 𝑆/𝑆_0 \)
    \( 𝐻/𝐻_0 = 0.297 + 0.432 𝑆/𝑆_0 \)
    \( 𝐻/𝐻_0 = 0.262 + 0.454 𝑆/𝑆_0 \)

    CONCLUSION

    In conclusion this study provides methods for estimating global and diffuse solar irradiance as well as beam solar irradiance at any location in Yemen Arab Republic. This will be useful for the design of various systems utilizing solar energy. Work is also going on to evaluate the monthly average of hourly solar irradiance in the main towns in Yemen. 

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    A. KHOGAL, M. R. I. RAMADA (2021). Kholagi et al.model, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/ec45ee4b-de31-4023-8062-a890a3fe2f90
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    Contributor(s)
    Initial contribute : 2021-09-07

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    Authorship

  • A. KHOGAL
  • M. R. I. RAMADA
    • Is authorship not correct? Feed back

    History

    Last modifier: 
    lu zhang
    Last modify time: 
    2021-09-21
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