[Equest-users] Adobe/Compressed Earth Construction?

[Karen Walkerman]

I found this resource:
http://www.builditsolar.com/Projects/SolarHomes/PasSolEnergyBk/Chapter03.pdf(page
5) which lists all the material properties you need in order to model
adobe in eQuest.  Not sure about their agreement with the forthcoming ISO
certification.

I have modeled high thermal mass buildings in eQuest with varying degrees
of success.  The thermal mass definitely had an impact on energy use, but
when modeling buildings that had very high thermal mass, the program began
to break down.  In one model when I looked at hourly space temperature
data, the space temperature was as expected for 99% of the hours, but there
were some hours with negative temperatures.

I advise caution and that you conduct a thorough review of hourly results
to make sure the material is having a logical impact.

--
Karen

On Wed, May 16, 2012 at 10:19 AM, Nathan Kegel <nathan.kegel at iesve.com>wrote:

> I had a conversation with one of the rammed earth wall manufacturers about
> this very topic a couple weeks ago.  It seems that it’s taking quite a bit
> of time to get through the ISO certification process.  Once that’s
> complete, there will be more widely published and certified data about
> these wall types available.
>
>
>
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> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Cole Hudson
> *Sent:* Wednesday, May 16, 2012 9:14 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Adobe/Compressed Earth Construction?
>
>
>
> Yeah, I'm sorry. I didn't really phrase that question very well. I was
> hoping somebody might have some representative values for adobe bricks that
> I could plug in. I've been very surprised at how difficult this information
> is to track down.
>
>
>
> Another thing that I've always heard of adobe walls is that they absorb
> moisture during the night and then the walls will cool down as the moisture
> evaporates during the day. I don't think this is something that eQUEST
> models, and was wondering if this effect is even significant enough to
> worry about.
>
>
>
> *From:* Dana Etherington [mailto:Dana.Etherington at crbusa.com]
> *Sent:* Tuesday, May 15, 2012 7:26 AM
> *To:* Cole Hudson; equest-users at lists.onebuilding.org
> *Subject:* RE: Adobe/Compressed Earth Construction?
>
>
>
> Cole,
>
>
>
> The performance of an adobe wall is more related to its thermal
> capacitance, or ability to store heat, not necessarily the R-Value… You
> should be able to model this in eQuest by creating a material and defining
> its thermal properties. I have never tried it myself though.
>
>
>
> The wall basically absorbs heat from the sun throughout the day and
> transfers some of that heat to the interior once the sun goes down. Good
> for climates with high temperatures during the day and cooler temperatures
> at night.
>
>
>
> Hope this helps.
>
>
>
> Dana
>
>
>
> *Mr. Dana Etherington, E.I.T., LEED AP BD+C *| *CRB *| One Kendall Square
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> *From:* equest-users-bounces at lists.onebuilding.org
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Cole
> Hudson
> *Sent:* Monday, May 14, 2012 7:27 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Adobe/Compressed Earth Construction?
>
>
>
> I'm working on a small building in a coastal environment in South Texas.
> The Architect is contemplating adobe construction. Unfortunately, my search
> of the archives did not yield any results, as the archives are full of
> discussions regarding Adobe PDFs.
>
>
>
> When assembled, the R-Value is only around R-6.0, or even less. If you
> believe all the propaganda these adobe salesmen are pushing, it would seem
> that an adobe wall can perform much better than that. Has anybody ever
> successfully modeled an adobe wall in eQUEST?
>
>
>
> Cole Hudson, E.I.T.
>
> Stridde Callins & Associates, Inc.
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