[EnergyPlus_Support] Re: Heat gained/lost through blinds.

["cgueymard" <chris@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

To everybody interested in the effect of venetian blind geometry,
there is a new paper in press on this topic:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V50-4SVCRMK-1&_user=6583708&_coverDate=06%2F26%2F2008&_rdoc=8&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235772%239999%23999999999%2399999%23FLA%23display%23Articles)&_cdi=5772&_sort=d&_docanchor=&_ct=50&_acct=C000047720&_version=1&_urlVersion=0&_userid=6583708&md5=ba670c8d4d18c80ae9a1b6918b84ea86

Chris



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "gv.deepak" <gv.deepak@...>
wrote:
>
> Hello everyone,
> 
> I am involved in simulating Interior venetian blinds on 6'X6' window
> in a 11'X15'office building in Gainesville, Florida. I have been
> simulating the blinds for getting energy consumption and Illuminance
> values for the Office room. The simulations are performed for three
> design days i.e March 21, June 21 and December 21. The simulations are
> performed for different slat angles varying from 0 to 90 degrees.
> 
> According to common observation as the slat angle of the blinds
> closes the Illuminance values decreases along with the heat gained
> from outside. Thus the expected results would be to have a constant
> decrease in the HVAC energy consumption due to decrease in the heat
> gain in March and June and decrease in HVAC Energy consumption due to
> decrease in heat loss in December.
> But according to the results I obtained from the simulations, I
> observe that the HVAC Energy consumption does not decrease due to
> closing of the blinds.
> From previous research in the same field it has been observed that
> there is decrease in the HVAC energy consumption when the blinds are
> closed. The decrease in energy is  approximately equal to 10-12 % for
> change in blind angle from 15-45 degrees and 14-16 % for change in
> slat angle from 0 - 15 degrees.
> But from the results that I obtained I am able to observe a HAVC
> energy difference of 1 % due to change in slat angle from 0-45 and 45
> -90 degrees. This does not show logical results. 
> 
> Does Energy plus recognize heat gain/heat loss through windows ?
> Does the HVAC take into consideration the Heat gained/ Lost from
windows.
> I am uploading the Input file along. The name of the file is :
> 2008.07.16CONVENTIONAL-45 EXTERIOR.
>



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