RE: [EnergyPlus_Support] Re: Design Day V.S. Schedule

[YuanLu Li <yli006@xxxxxxxxxxx>]

565 watt/meter square  is about right for an average value of solar beam intensity.

You should be able to read all these from the report variable.

I will try to run your IDF again.  The skylight from the two roof will give you dirrent readings.  That was why I said that I do not have enough information to comment. 

I do not know what  @20:20 means.  If it is 8 pm, there will be no sun.

EPlus may not include the diffused component in the beam component.

I do not follow your equation at present and the list of angles and how they are used.

 Dr. Li  


To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: zqianmin@xxxxxxxxx
Date: Thu, 14 Jul 2011 10:08:48 -0700
Subject: Re: [EnergyPlus_Support] Re: Design Day V.S. Schedule


 I choose " Run simulation for weather file run periods"
Here is the equation used to calculated window solar incident:
window_transmitted_hg = tau_D * E_D + tau_diff * E_diff
tau_D is the transmittance of the  window to direct (beam) radiation
E_D is the incident direct (beam) radiation flux
tau_diff is the transmittance of the  window to diffuse radiation
E_diff is the incident diffuse radiation flux