I have never used Window but I'm using DesignBuilder. If in DesignBuilder as "Definition method" for the glazing part I use "Material layers" DesginBuilder calculates the U-value according to the European standard EN 673 (what I got from the window manufacturer!). Could I adjust the properties of the window in DesignBuilder until the U-value and the SHGC correspond with the manufacturer's values and then export the model in EnergyPlus? Or is Window 6 much better?
I shall include the frames too. I got the U-values for the glazing part, for the frame, and for the whole window. I could adjust the U-values of the frame in order to have the correct U-value of the whole window, which is a weighted average.
It's been some time since I played with these values...from what I remember the combination of SHGC and U-value was hard to get. When I got it to match and switched to the american standard conditions, my U-value of 1.1 went up to 1.4 and the SHGC stayed much the same. But I was investigating the assembly as a whole including frame.
Thank you, Jean and Rahul.
I see that as "environmental conditions" in the software Window 6 there are "NFRC 100-2010", "NFRC 100-2010 winter", and ""NFRC 100-2010 summer". Does EnergyPlus evaluate the properties in the "NFRC 100-2010" conditions?
I see that between the European standard and the American standard the differences can be particularly high for low U-values and large air gaps:
On 21.10.2013, at 17:29, <fpasserini.tn@...> wrote:
I'm modeling a building according to ASHRAE 90.1-2007. It is a design building.I got U-values according to European technical standardsISO 12567-2:2005andEN 673:2011I'm modeling the glazing surfaces with the object WindowMaterial:SimpleGlazingSystemDo you know if I have to change the values before writing them in EnergyPlus, in order to consider different test conditions between European technical standards and EnergyPlus?With Regards