[Virtual-sim] Low DF-values with Radiance

[Erik Eriksson]

Hey,

Yeah, I've tried that. With more or less the same result.
I'm quite new to this with lighting calculations. I'm more used to energy 
performance. 
So I cant really say if the values are correct or not.

Best regards

E r i k   E r i k s s o n 

Energy specialist and project manager
________________________________
White project & environmental management

Box 4700
116 92 STOCKHOLM
Phone: +46(0)8-402 26 77
Fax:      +46 (0)8-402 25 10
Visit:     Östgötagatan 100
http://www.white.se

We are certified according to ISO 9000 and 14 001



From:
Paul Carey <paul at zed-uk.com>
To:
Erik Eriksson <erik.eriksson at white.se>
Cc:
"virtual-sim at lists.onebuilding.org" <virtual-sim at lists.onebuilding.org>
Date:
2009-09-28 17:06
Subject:
Re: [Virtual-sim] Low DF-values with Radiance



Erik

Try carrying out a model for one room at a time. The results tend to be 
quite different.

Cheers
Paul 



Sent from my iPhone

On 28 Sep 2009, at 15:55, Erik Eriksson <erik.eriksson at white.se> wrote:


Hi all, 

I'm doing some daylighting studies with RadianceIES with a model I've 
imported from revit. The model seems to have been imported just fine. 
However I'm getting very low DF-values. 
The rooms I've been studying are rectangular cellular offices with about 
12% of the floor area consisting of windows. 
The results show that approx 5-10% the area of a working plane at 0,8 m 
above the floor has a DF-value of 1.2 %. 
This feels like a very low number. The window transparancy is 0,9 and all 
the walls are white colored. The ceiling is white and the floor is gray. 

Does anyone have a suggestion as to what might be wrong or if these values 
seem ok. 

Thanks in advance 

Best regards 

E r i k   E r i k s s o n 

Energy specialist and project manager
________________________________
White project & environmental management

Box 4700
116 92 STOCKHOLM
Phone: +46(0)8-402 26 77
Fax:      +46 (0)8-402 25 10
Visit:     Östgötagatan 100
http://www.white.se

We are certified according to ISO 9000 and 14 001
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