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Re: [EnergyPlus_Support] no differences between results in PCM and reference



Note that your temperature data in the temperature-enthapy pairs should be STRICTLY increasing.  The program uses the temperature to interpolate from the enthalpy for actual conditions.  If you have two identical temperatures, you could get a false result from the interpolation routine.

At 02:09 PM 3/5/2012, Mohammad Kheradmand wrote:


in my case, we have two test cells which we created a partition in middle of it (one with incorporation PCM and another without PCM), now i try to simulate these two test cell for verifying experimental results, also we put a data logger to measure ambient temperature of cells in two direction (north and south surfaces).

i don't know, where is wrong in .idf file , maybe because of enthalpy-temperature (i put your example file data).

i try to check other parameters again.
regards


From: CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, March 5, 2012 8:07 PM
Subject: Re: [EnergyPlus_Support] no differences between results in PCM and reference

 
Put insulation, or nothing in place of brick is what I would do, as most buildings are "light weight" and would not have such brick.

I would say you are getting close.

Could you please describe in detail the goals of your project?

Thanks

On Mon, Mar 5, 2012 at 12:02 PM, Mohammad Kheradmand < mohammadkheradmand@xxxxxxxxx> wrote:
 
I tried, i got reasonable result between reference and PCM almost 3 -4 degree also i put brick again in partition and result was same as before i did(no difference), but the differences between experimental and simulation is too high (almost 10-15 degree), what can i do?


From: CleanTech Analytics < jeremiah@xxxxxxxxxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, March 5, 2012 7:13 PM

Subject: Re: [EnergyPlus_Support] no differences between results in PCM and reference

 
Try this and let me know..

On Mon, Mar 5, 2012 at 11:02 AM, Mohammad Kheradmand < mohammadkheradmand@xxxxxxxxx> wrote:
 
I try to retrify experimental result, i cant move to outer wall, so it is necessary to be on outer layer of partition, my weather file refer to 2005 i don't  know, how can i convert to 2011 as a new one? also the thickness is fix .

thanks


From: CleanTech Analytics < jeremiah@xxxxxxxxxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, March 5, 2012 6:28 PM
Subject: Re: [EnergyPlus_Support] no differences between results in PCM and reference

 
Try moving your PCM to an outer wall, or changing your weather file, or changing the thickness of your PCM.
Also make a spreadsheet that compares the two in terms of percent, as small savings in kWh for a single day may be bigger savings then it seems by just looking at kWh.

Let me know if you still have the issue after experiments..

On Mon, Mar 5, 2012 at 9:50 AM, Mohammad Kheradmand < mohammadkheradmand@xxxxxxxxx> wrote:
 
Could you please help me , what is wrong ? why i have, same results between two simulation?

regards




--
Jeremiah D. Crossett
CleanTech Analytics
503-688-8951
www.cleantechanalytics.com


This 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






--
Jeremiah D. Crossett
CleanTech Analytics
503-688-8951
www.cleantechanalytics.com


This 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






--
Jeremiah D. Crossett
CleanTech Analytics
503-688-8951
www.cleantechanalytics.com

[]
This 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







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