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The Sun and Solar Geometry

  • J. R. Simonson
Chapter

Abstract

The Sun is but one of a vast number of stars within the Milky Way Galaxy and it contains over 99 per cent of the matter within the Solar System The Sun has a surface temperature of approximately 5760 K and emits radiant energy at the rate of 380 × 1015 GW. The Earth travels round the Sun in 365¼ days with the axis of rotation of the Earth at an angle of 23.45° to the plane of rotation around the Sun, which results in seasonal changes in the illumination of the Earth. In addition the path of the Earth around the Sun is slightly elliptical, so that the intensity of solar radiation outside the Earth’s atmosphere, the Solar Constant, varies slightly throughout the year.

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References

  1. 2.1
    Lunde, P.J., Solar Thermal Engineering, John Wiley, New York, 1980.Google Scholar
  2. 2.2
    Coulson, K.L., Solar and Terrestrial Radiation, Academic Press, New York, 1975.Google Scholar
  3. 2.3
    Painter, H.E., ‘The shade ring correction for diffuse irradiance measurements’, Solar Energy, Vol. 26, pp. 361–363 (1981).CrossRefGoogle Scholar
  4. 2.4
    Steven, M.D. and Unsworth, M.H., ‘The Diffuse solar irradiance of slopes under cloudless skies’, Quart. J. Roy. Met. Soc., Vol. 105, pp. 593–602 (1979).CrossRefGoogle Scholar
  5. 2.5
    Steven, M.D. and Unsworth, M.H., ‘The angular distribution and interruption of diffuse solar radiation below overcast skies’, Quart. J. Roy. Met. Soc., Vol. 106, pp. 57–61 (1980).CrossRefGoogle Scholar
  6. 2.6
    McGregor, J., ‘Inclined surface radiation measurements at Cardiff’, The National Radiation Centre, Helios No. 9, published by The Solar Energy Unit, University College, Cardiff, 1980, pp. 10–11.Google Scholar
  7. 2.7
    Darby, T.C., An appraisal of solar water heating, Final Year project, Department of Mechanical Engineering, The City University, London, June 1978.Google Scholar
  8. 2.8
    Walraven, R., ‘Calculating the position of the Sun’, Solar Energy, Vol. 20, pp. 393–397 (1978).CrossRefGoogle Scholar

Copyright information

© J. R. Simonson 1984

Authors and Affiliations

  • J. R. Simonson
    • 1
  1. 1.Department of Mechanical EngineeringThe City UniversityLondonUK

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