[Bldg-sim] Building Heat Gains

[Andrew Corney]

Hi Sambhav,

Yeah - I'd agree with Cory - you probably have a higher glazing surface
temperature with the unshaded model and I wouldn't be surprised if that is
part of the conduction equation, meaning you are less likely to gain heat
through conduction if the glazing is in full sun.

cheers,

Andrew

On Mon, Nov 24, 2014 at 2:55 PM, Duggin, Cory <Cory.Duggin at tlc-eng.com>
wrote:

> The VE doesn’t model thermal bridging, so that isn’t it.  What climate is
> your building in?  What percentage glazing are the east and west walls?
> Are you losing heat through the envelope or gaining it?  It could have to
> do with the shades blocking more sun from heating up the outside of the
> envelope on those walls, which then changes the delta T and resulting
> conduction gain.
>
>
>
> *Cory Duggin, EI, LEED AP BD+C *
>
> *Associate/Energy Engineer*
>
> *TLC Engineering for Architecture *
>
> direct:
>
> 615-346-1939
>
>
>
>
>
> *From:* Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] *On
> Behalf Of *Sambhav Tiwari
> *Sent:* Monday, November 24, 2014 2:21 AM
> *To:* Attiq
> *Cc:* bldg-sim
> *Subject:* Re: [Bldg-sim] Building Heat Gains
>
>
>
> Hi All,
>
>           Thanks for the reply this analysis was done in ies ve and the
> external conduction gains are increasing with shading while solar gains are
> reducing
>
>
>
> i am sending the snapsort of the building with shading in east and west
>
>
>
> Regards
>
> Sambhav
>
>
>
> On Sat, Nov 22, 2014 at 9:46 PM, Attiq <aur at bepc.biz> wrote:
>
> The shades are attached to the building exterior and there is no thermal
> break between the shades and the exterior walls. The shades act as fins
> conducting heat to the outside.
>
> Attiq
>
> Sent from my iPhone
>
>
> > On Nov 22, 2014, at 7:15 AM, Sambhav Tiwari <tiwari.sambhav at gmail.com>
> wrote:
> >
> > Dear All,
> >                I am analyzing a rectangular building with each and west
> facades structured glazed and forming longer sides of rectangle  and i
> shaded these facades with louvers (shading device)
> >
> > I compared the annual heat gains of two case1 building with no shading
> case 2 building with shading(louvers) what i found was there is
> considerable reduction in annual solar gains in building but the annual
> external conduction gains in building have increased after shading i am
> unable to understand this.
> >
> > Any one who can share his ideas on this.
> >
> >
> > Warm Regards
> > Sambhav Tiwari
>
>
>
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