[TRNSYS-users] Weather information for Seville

[mcdowell at tess-inc.com]

The error you are making is that L_st for the CET is 15 degrees East
not West or -15 degrees West 

Thus the Solar Time - Standard Time =
4*(-15-5.98) + E = -83.92 + E 

Tim 

---
Timothy P. McDowell
Executive
Vice President
Thermal Energy System Specialists, LLC
22 N Carroll St,
Suite 370
Madison, WI 53703
608-274-2577

On 2013-04-15 05:42, Fariborz
Kargar wrote: 

> 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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