measurement and comparison of solar radiation estimation models ...
measurement and comparison of solar radiation estimation models ...
measurement and comparison of solar radiation estimation models ...
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The equation was in the Group 2.<br />
H<br />
Hₒ<br />
4.8. Ulgen <strong>and</strong> Hepbasli’s Model<br />
S<br />
= 0.318 + 0.449 (4.9)<br />
Sₒ<br />
Based on <strong>measurement</strong>s made in the Meteorological Station <strong>of</strong> Solar Institute,<br />
Ege University, Izmir from 1994 to 1998, a third order quadratic equation (Group 4) is<br />
developed. The formula is given by,<br />
H = Hₒ [0.2408 + 0.3625 S<br />
S<br />
+ 0.4597 <br />
Sₒ Sₒ <br />
<br />
− 0.3708 S<br />
Sₒ <br />
<br />
] (4.10)<br />
4.9. Ulgen <strong>and</strong> Hepbasli’s Model<br />
Using the data available for Ankara, Istanbul <strong>and</strong> Izmir over a 19-yr period,<br />
Ulgen <strong>and</strong> Hepbasli developed the following equation:<br />
H = Hₒ [0.2854 + 0.2591 S<br />
S<br />
+ 0.6171 <br />
Sₒ Sₒ <br />
<br />
− 0.4837 S<br />
Sₒ <br />
<br />
] (4.11)<br />
4.10. New Developed Equation 1<br />
A linear equation has been developed to estimate monthly-average daily global<br />
<strong>solar</strong> <strong>radiation</strong> in Izmir, as follows:<br />
4.11. New Developed Equation 2<br />
given by;<br />
H = Hₒ[0.263 + 0.512 S<br />
] (4.12)<br />
Sₒ<br />
Using regional data, a Group-3 type <strong>of</strong> equation has been developed that was<br />
H = Hₒ [0.238 + 0.610 S<br />
S<br />
− 0.085 <br />
Sₒ Sₒ <br />
<br />
] (4.13)<br />
22
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