[TRNSYS-users] Weather information for Seville

[Fariborz Kargar]

Hi again,

Seville is on 37.38 N, 5.98 W. Considering the equation 1.5.2 from "Solar
Engineering of Thermal Processes" (by Duffie and Beckman) we will have:
1- Seville has 1 hour difference with GMT---> so: L_st = 15 * 1 = 15
degrees West
(on 21st of Dec we have n=355, so B= (n-1)360/365---> B = 349.17, therefore
E = 2.17 min (equation 1.5.3))
Solar Time-Standard Time = 4 (L_st-L_loc) + E = 4 (15- 5.98) + 2.17 = 38.25
minutes

Hence on 21st of Dec at Solar Time = 12:00 we will have the local standard
time equal to : 11:22

at this time: solar zenith angle should be minimum. But surprisingly, this
is not we see in the curves. that is why it is confusing for me. In the
Graph the minimum Zenith angle happens at 8509: means 14:00- How can you
interpret this discrepancy?
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