Re: [EnergyPlus_Support] overhang and fin material

I had got similar results - i.e. no change in temperature variation over an year by changing reflectance of overhangs - for a building in Northern hemisphere but it had widows on all sides though majority window are was on north and south sides.Â

I did not pay much attention at that time because even without changing reflectance I was achieving required number of comfortable hours.

It would be helpful if other share their experience.

I must add one point that I had changed the relfectance properties of wall and roof material before modifying the corresponding values of overhangs. Though as per my understanding, overhang material is different from the roof/wall material.

Regards,

Asit

On Thu, Aug 21, 2014 at 10:45 AM, 'jeannieboef@xxxxxxxxx' jeannieboef@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

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Thats weird. The only physical way that is possible is to have only north facing windows for a house in the northern hemisphere. What weather file are you using? Does the error report have any telling errors?

Mit freundlichen GrÃ¼Ã?en- Sent from my iPhoneÂ (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel. Â +49 30 6706662-23

On 21.08.2014, at 00:37, "marzie rasekh rose00200@xxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

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Thanks jean
i tryÂ "ShadingProperty:Reflectance" but with different solar reflectance i got the same result.

On Wednesday, 20 August 2014, 14:38, "Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

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sorry...that should be MUST be set to FullExteriorWithReflections or better

2014-08-20 21:37 GMT+02:00 Jean Marais <jeannieboef@xxxxxxxxx>:

Check the "Building" object, Field: Solar Distribution must not be set to FullExteriorWithReflections or better.

2014-08-20 20:14 GMT+02:00 marzie rasekh rose00200@xxxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>:

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Thanks linda.
but when i set different solar reflectance in "shading property: reflectance" for shadings i did not get new result and i have the same heating and cooling energy consumption.
i should just set the "shading property: reflectance" or there is another setting i should do?

On Wednesday, 20 August 2014, 13:05, "Linda Lawrie linda@xxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

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Shading surfaces are not part of the thermal load on the building and though they can have reflectance, they do not really have constructions such as the rest of the building elements have.