You should be doing your DSC test of the composite in order to get the correct J/kg for your PCM
composite , as your J/kg will be inaccurate if you simply add the lime to the material. (or so I was told in the past when the J/kg where said to be very high for the BioPCM product until they realized that it is pure PCM without additives.) I have attached files on possible testing methods, I suggest you to use the T-History method due to the large sample size involved with your composite wallboard.
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For the file you sent:
I have edited your IDF files to have the BioPCM product's temperature enthalpy set with a melt temp of 21C (because you where unsure of your data) changed your construction with PCM to internal source sink layer construction (this is what I have noticed to be the factor that made my PCM simulations work) added HTML reports so results can be viewed quickly (You may not need this and can turn it off if you wish( and time bins for the detailed output you require (you may have to adjust the time bins settings), added some variables specific to CFD, added some meter outputs, changed your convergence limits to ones that are more stable (but take more time to simulate), changed the design day to match weather file, added output .SQL so you can use the tool called "Results viewer" available from the NREL-Open studio package (register & download) http://openstudio.nrel.gov/resultsviewer-getting-started
Also I created a baseline-nopcm to test against, and ran a parametric analysis-- each of which are attached, and added a HVAC system using ideal loads to zone1,but did not have time to add one to zone2 and would advise you to do so....
Hopefully this works for you, and feel free to email me with any further questions.
Lastly, if you get good temperature enthalpy data for the BASF product and can share I would be very appreciative..(I want to do comparative analysis with the BioPCM)
Thanks
On Sat, Mar 3, 2012 at 10:43 AM, Mohammad Kheradmand <mohammadkheradmand@xxxxxxxxx> wrote:
I have plan to do it during current month, i have just one doubt in the test, in my case the last layer in compose(20%lime+40%gypsum+20%PCM) and theses are not hemogenouse as you know, so for making test i need to do it for PCM or compose of all materials?
From: CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx>
To: Mohammad Kheradmand <mohammadkheradmand@xxxxxxxxx>
Sent: Saturday, March 3, 2012 6:31 PM
Subject: Re:I think I have your issues solved now and will send back your IDF with my edits, but first please provide the real temperature enthalpy set.On Sat, Mar 3, 2012 at 10:07 AM, Mohammad Kheradmand <mohammadkheradmand@xxxxxxxxx> wrote:
This is my .idf file , but i used another temperature-enthalpy results , these are not actual, for now i try to simulate my experimental setup ,also i am not expert in enrgyplus i started 2 months ago. anyway, can you see my file and tell me what is wrong?regars
On Sat, Mar 3, 2012 at 9:34 AM, CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx> wrote:
Mohammad,You have your parameters mixed up.The timestep is the number of iterations and the finite difference algorithm requires no less then 20/one per 3 minutes.The output variable is where you can specify what is produce temperatures in 30 minute intervals.
For instance you could set your timestep to 60/one per minute (max accuracy) and then set your output for sub hourly, hourly, daily, monthly or annual. Again the timstep has nothing to do with output, as output is handled with output variables and output meeter.If you would like to send me your IDF I can get it working for you.
Also I am wondering if you might have temperature enthalpy sets that I could use to cross reference with mine, as I would love to see the performance difference between the respective products..ThanksOn Sat, Mar 3, 2012 at 9:21 AM, Mohammad Kheradmand <mohammadkheradmand@xxxxxxxxx> wrote:
Thank you for your information,Actually we create a wall inside the cell test which in last layer of materials used 20% PCM (micronal-BASF), i try to simulate the behavior of temperature changes by energyplus. data loger in used can measure temperature each 30 mintutes and i want to obtain output for 30 minutes but alters are not 30 mintute.. i though if i change timestep from 20 (defoult for PCM) to 2 it will be happen ..but i dont know what is wrong exactly.regardsmohammadOn Sat, Mar 3, 2012 at 12:19 AM, Mohammad Kheradmand <mohammadkheradmand@xxxxxxxxx> wrote:
Hello,I try to simulate PCM by energyplus, for the out put result how i can get each 30 minute temperature (in default exit just hourly,timestep,...) because my data from experiment are each 30 minute and i want to match with them.also one i changed timestep from 20 (for PCM ) to 2 to get that result (each 30 minute ) but i had error for it.regardsmohammad
From: CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Friday, March 2, 2012 10:37 PM
Subject: Re: [EnergyPlus_Support] First time with this software
Open an exzample file and weather file using the EP launch, click simulate..checkout open studio, and the free trial if design builder to create your file from scratch...email me if you need more advise..
On Fri, Mar 2, 2012 at 1:51 PM, Abel <abelalonso71@xxxxxxxxx> wrote:
This is my first day with this software. I have worked with many other ones, Trace, hap, equest, flares, flacom, you name it. I am having such a hard time to start with this software. Can some one tell me how to start a project, I am assuming that I am missing something in the installation since I already donwloaded everything and still could not find the way to start. All the previous softwares are pretty similar on their input procedure, what about this one? Thanks in advance.
--Jeremiah D. CrossettCleanTech AnalyticsThis 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. CrossettCleanTech AnalyticsThis 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. CrossettCleanTech AnalyticsThis 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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