I suspect there's something wrong in the modeling of the blinds. The effect of night sky radiation is not so pronounced on a window, because (1) half of what it sees is ground, (2) the other half is the sky at low angles where the sky temperatures are much less depressed as they are looking straight up the sky.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
On 10/7/2014 11:00 PM, 'jeannieboef@xxxxxxxxx' jeannieboef@xxxxxxxxx [EnergyPlus_Support] wrote:
If you have a building with lots of glass, don't forget the radiant exchange with the night sky at -60 C. The "radiant night cooling" is possibly being blocked by the blinds, if the blinds are there during the night.
Mit freundlichen Grüßen- Sent from my iPhone (excuse the brevity)
i. A.Jean Maraisb.i.g. bechtoldTel. +49 30 6706662-23
On 06.10.2014, at 21:53, "annavenediki@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Hello,
I've designed a south facing room with a floor- to-ceiling window and blinds covering the whole surface of the window. I run two simulations, one with no blinds on the window and one with blinds covering the window in order to compare the results. The building's location is in Eastern Europe. The run period is from July to August (sunny and hot period). Both output variables "Zone mean air temperature" and "Surface inside face temperature", have much higher values when the simulation is run with the blinds on the window. How can this be possible? Can it be explained in a way or is there something wrong with the data?
Thanks in advance,
Anna V.
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Posted by: Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx>
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