[Equest-users] ask for thermal properties of enveloppe construction

[Bishop, Bill]

Hi Marwa,
I don’t know what the specific area of your research is, but if you want to accurately model the behavior of phase chase materials, you would need to do that in another simulation tool. In DOE-2/eQUEST:

-        Material properties are constants. You can only enter one value for specific heat per material.

-        Latent heat transfer through envelope materials is not simulated (except due to infiltration).
I am not aware of any good workarounds in eQUEST if the paraffin wax is an important consideration relative to total building performance.
Jeremiah Crossett asked about this topic back in 2012 per the attached email.
Regards,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

[cid:image002.jpg at 01D39504.7C889510]  [cid:image004.jpg at 01D39504.7C889510]



134 South Fitzhugh Street                 Rochester, NY 14608

T: (585) 698-1956                        F: (585) 325-6005

bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>             www.pathfinder-ea.com<http://www.pathfinder-ea.com/>

[http://png-5.findicons.com/files/icons/977/rrze/720/globe.png]Carbon Fee and Dividend - simple, effective, and market-based.


From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of OTH Marwa via Equest-users
Sent: Wednesday, January 24, 2018 3:17 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] ask for thermal properties of enveloppe construction

Hello,
I am creating shells for a building in EQUEST, and i am creating materials of construction layer by layer which i insert  thermal properties of each layers ( thickness, conductivity density specific heat r thermal resistance )
About the specific heat, can i insert a range of heat or latent heat value furthermore sensible heat because i will make a specific materiel (parrafin wax which it store energy when it solidify (high temperature)  and restitue heat when it melts (low temperature).

I am waiting for your repply as soon as possible
Thank you

Marwa Othmen
PhD student

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180124/51ee69e9/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 1517 bytes
Desc: image002.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180124/51ee69e9/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 1647 bytes
Desc: image004.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180124/51ee69e9/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.png
Type: image/png
Size: 3856 bytes
Desc: image006.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180124/51ee69e9/attachment.png>
-------------- next part --------------
An embedded message was scrubbed...
From: CleanTech Analytics <jeremiah at cleantechanalytics.com>
Subject: Re: [Equest-users] [Bldg-sim] Work Arounds for modeling Phase	Change Materials
Date: Fri, 10 Feb 2012 22:19:21 +0000
Size: 21616
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180124/51ee69e9/attachment.mht>