<html> <head> <style> .hmmessage P { margin:0px; padding:0px } body.hmmessage { font-size: 10pt; font-family:Verdana } </style> </head> <body class='hmmessage'> Dear, all  My question is: if I have a weather file of a city ,city's logitude difference is shown as -28.9, then do I have to modify it and make it between  -15 and 15 degree? if I don't modify it, then I will get a wrong simulation result?   thank you for your time. regard, paul > From: jon@esru.strath.ac.uk > To: esprfans@hotmail.com; esp-r@lists.strath.ac.uk > Date: Tue, 30 Dec 2008 09:53:09 +0000 > Subject: RE: [esp-r] effect of longitude and latitude on the PV window power output? > > > Changes in longitude will result in the angle of the sun > which will alter the geometric relationship between the sun > and a surface. > > It should be easy to test this running a simulation and dumping > the PV performance to a file and then altering the MODEL SITE position and making > a second run and looking at the differences. > > -Jon Hand > ________________________________________ > From: esp-r-bounces@lists.strath.ac.uk [esp-r-bounces@lists.strath.ac.uk] On Behalf Of Leepaul [esprfans@hotmail.com] > Sent: 27 December 2008 02:06 > To: esp-r@lists.strath.ac.uk > Subject: [esp-r] effect of longitude and latitude on the PV window power output? > > Dear all, > > what is the effect of longitude and latitude on power output of the vertical PV windows toward the west. > > for example, I'm simulating the vertical PV window toward the west located at London, fisrtly I get a power output from the original weather file, then keep anything of London weather file unchanged but change London' longitude, then what will happen for power output? > > regards, > paul > > ________________________________ > MSN保护盾，十八般武艺保障MSN安全！现在就下载！<http://im.live.cn/safe/> <hr />查看 Windows Live™ 的更多精彩功能。不只是收发邮件 — 了解Windows Live™ 的其他强大功能。 <a href='http://www.microsoft.com/windows/windowslive/' target='_new'>不只是收发邮件</a></body> </html>