[Bldg-sim] Building envelope average energy demands

[Giulio Castorina]

I see.
Do you dataset where I can I at least retrieve construction costs per 
building components? Such as a breakdown of  Envelope/Energy Plant 
Facilities/Plumbing/Elevators etc..?

Il 27/08/2011 04:41, Reba Schaber ha scritto:
>
> The graph/pie chart is not from ASHRAE 90.1.  I believe the author is 
> trying to show the energy savings of a building designed to the 
> requirements of ASHRAE 90.1 as compared to a building not following 
> energy savings design practices.
>
> *****PH*_MECHANICAL ENGINEERING
> _ *Reba Schaber*      Mechanical Engineer, P.E.
>                                      LEED Accredited Professional
> 1660 N. Alvernon Way                Voice: (520) 731-2060
> Tucson, Arizona 85712                Fax: (520) 731-2061
> _rschaber at phmech.com <mailto:rschaber at phmech.com>_
>
> *From:*bldg-sim-bounces at lists.onebuilding.org 
> [mailto:bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Giulio 
> Castorina
> *Sent:* Friday, August 26, 2011 2:17 PM
> *To:* Goldwasser, David
> *Cc:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] Building envelope average energy demands
>
> Hi All,
>
> thank you all for your quick response. Actually I don't want to 
> calculate that value, but just need to cite/reference a source that 
> gives information about this data.
>
> I found this http://www.sustainablefacility.com/articles/print/86593 
> where a graph is shown...but not really references fully. It says 
> about ASHRAE Std 90 - I dont have access to this. Is this a chart 
> inside the Do you know if it is inside the ASHRAE standards?
>
> In particular I'm looking at expenditure through external vertical 
> walls/windows - hence facades especially in office buildings.
>
> Best
>
> Giulio
>
> Il 26/08/2011 23:06, Goldwasser, David ha scritto:
>
> Maybe not quite what you are looking for, but we have a video 
>  tutorial showing an envelope elimination parametric. In this example 
> we used a full service restaurant but you can do this with any model. 
> The approach is to run a baseline simulation and then to switch all 
> exterior and ground exposed surfaces to an adiabatic boundary 
> condition. Next remove all fenestration surfaces. Then re-run the 
> model. Due to the load driven nature of this project the maximum 
> savings through envelope improvements was just over 3%, but maybe 
> would be 15-20% for an office. Of course it depends where the project 
> is located; the harsher the climate, the more potential savings 
> through envelope improvements. And it depends on the quality of the 
> envelope that you use as a starting point; building activity, and 
> mechanical system efficiency.
>
> Here is a link to the video.
>
> http://www.youtube.com/watch?v=7U91jeksOAw&list=PLF80F250937E2A648&index=38&feature=plpp 
> <http://www.youtube.com/watch?v=7U91jeksOAw&list=PLF80F250937E2A648&index=38&feature=plpp>
>
> And here is a link to COP adjusted end use graphs in Google Documents
>
> https://docs.google.com/spreadsheet/ccc?key=0AhCALIzwiaGPdEI5ZHhaVmpfUHAtdGFDMjg5eW5tT1E&hl=en_US#gid=49 
> <https://docs.google.com/spreadsheet/ccc?key=0AhCALIzwiaGPdEI5ZHhaVmpfUHAtdGFDMjg5eW5tT1E&hl=en_US#gid=49>
>
> This doesn't mean that only 3% of the energy is due to the envelope, 
> but it does show potential savings for retrofits on various elements. 
> You could get more specific and just isolate the roof, or even solar 
> gain from the windows. Or run create an elimination run for plug loads 
> where you set loads to nothing.
>
> David
>
> --
>
> David Goldwasser, LEED AP
>
> National Renewable Energy Laboratory
>
> *From:*bldg-sim-bounces at lists.onebuilding.org 
> <mailto:bldg-sim-bounces at lists.onebuilding.org> 
> [mailto:bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *John Eurek
> *Sent:* Friday, August 26, 2011 2:36 PM
> *To:* Giulio Castorina; bldg-sim at lists.onebuilding.org 
> <mailto:bldg-sim at lists.onebuilding.org>
> *Subject:* Re: [Bldg-sim] Building envelope average energy demands
>
> I don't know if this answers your question, but I have tried to 
> determine the % of energy use due to the envelope on a recent building 
> by running multiple energy models.  What I found was the energy 
> balance in complex.
>
> An example is a perfect balance on a cold day
>
> "People" + "Lighting" + "Plug Loads" - "Loss through Wall" = 0
>
> So if the insulation was higher, your loss though the wall would be 
> less and the A/C power usage would be increased.
>
> You could hand calculate the envelope energy demand for an empty 
> unoccupied building, but with internal loads it gets foggy.
>
> The energy model will show you what you can expect from various 
> R-values, but I have not found a way to say x% of energy is due to the 
> envelope.
>
> *From:*Giulio Castorina <artitecture at gmail.com> 
> <mailto:artitecture at gmail.com>
> *To:* bldg-sim at lists.onebuilding.org 
> <mailto:bldg-sim at lists.onebuilding.org>
> *Sent:* Friday, August 26, 2011 2:52 PM
> *Subject:* [Bldg-sim] Building envelope average energy demands
>
> Hi All,
>
> Can anyone advise a good resource (article, webpage, book, etc..) 
> which states what is the average energy demands (construction+running 
> costs) due to Envelopes only in buildings? I would need just a figure 
> in percentage over the whole energy demands of a typical office 
> building. Is this data somehow available?
>
> Best,
>
> Giulio
> _______________________________________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to 
> BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG 
> <mailto:BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG>
>
>
> ------------------------------------------------------------------------
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 10.0.1392 / Virus Database: 1520/3859 - Release Date: 08/26/11
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20110827/1c8d7358/attachment-0002.htm>