I have attached my base radiant model (.idf, .svg, .eso). It is currently set for a CTF algorithm under V7 so you can view the system and base results. I just finished updating to V7.1 and still have significant disparity between the CTF and a CFD run seen most drastically visible in the summer operative temperature and related cooling energy. Another issue I have come across is that the ESO viewer does not seem to be cooperating with the update. It will open but remains minimized in my task bar.In terms of the PCM I have been working with an engineer at PureTemp who has provided me with the enthalpy/Specific Heat curves for a few of their products. I was intending to test the provided data with melting points at 20C 23C 25C and 28C.thanks for your help,JasonOn Wed, Jun 13, 2012 at 6:52 PM, CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx> wrote:
This should be entirely possible useing an internal source sink layer construction. May I ask what PCM you are using? If it helps I have been researching PCM modeling in E+ for some time and have DSC data and example files I could send you, or would be happy to take a look at your file.
Jeremiah D. CrossettCleanTech Analytics503-688-8951This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics
On Wed, Jun 13, 2012 at 6:04 PM, Linda Lawrie <linda@xxxxxxxxxxxxxx> wrote:Lots of changes were done/fixed in the V7.1 release for CFD.
First, I suggest you upgrade to V7.1> ------------------------------------
On 2012-06-13 18:58, jcsippel@xxxxxxxxx wrote:
> Hello,
>
> I am attempting to do an analysis of hydronically charged PCM and
> have two questions.
>
> The first is in the set up of my base radiant system. I have seen
> some posts in regard to the issue of ConductionTransferFuctions vs.
> ConductiveFiniteDifference algorithms but am hoping someone will be
> able to help clarify the issue with v7 and the application of radiant
> systems. I seem to have my base radiant system up and running fairly
> well but once I switch to a CFD algorithm in prep for adding PCM I am
> getting drastically different result compared to the CTF, primarily
> during summer cooling. I am having difficulty determining if this is
> a user error and needs further adjustment or if I am working against
> the program.
>
> My second question is in regard to the PCM. Again my study is trying
> to charge PCM in the walls and roof (Phoenix Cooling) to shift loads.
> My research is leading me to believe that E+ is not yet able to
> tackle
> this issue, "Modeling a radiant floor system with Phase Change
> Material (PCM) integrated
> into a building simulation tool: Analysis of a case study of a floor
> heating
> system coupled to a heat pump" which is dated fairly recent but again
> I am hoping someone has insight to confirm that this is not yet
> directly achievable in E+ or maybe direct me to a work around. I
> have
> found research suggesting TRANSYS aided in a PCM cooling panel study
> but after investing time into learning E+, switching programs won't
> be
> feasible for my timeline to switch.
>
> I appreciate your time and suggestions,
>
> Jason
>
>
>> Yahoo! Groups Links
>
> Primary EnergyPlus support is found at:
> http://energyplus.helpserve.com or send a message to
> energyplus-support@xxxxxxxx
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are currently allowed but be mindful that not everyone
> has a high speed connection. Limit attachments to small files.
>
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under
> the Documentation link and press the "search" button.
>
>
>
--Jason Sippel - LEED APMArch + MSBE Graduate StudentArizona State University847.436.1414
--Jason Sippel - LEED APMArch + MSBE Graduate StudentArizona State University847.436.1414
--Jason Sippel - LEED APMArch + MSBE Graduate StudentArizona State University847.436.1414
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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