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Re: [EnergyPlus_Support] PCM tank for hot storage



I am unsure about this approach, as the dynamic nature of PCM's would be very hard to account for in such a simple manor. I have heard of using ice storage with a curve for PCM's and cooling (in eQuest), but have not heard of using ice storage for heating.  Could you explain how you might account for PCM transition with a hot water storage tank, as there is not a curve to apply the PCM transition curve to> For instance for a DSC curve something like the following 27 melt>

Set Temperature (C) Enthalpy Sum (J/Kg)
1 -20.00         0.1
2 0.00                 5
3 10.00                 16458
4 15.00                 23562
5 20.00                 32561
6 25.00                 43078
7 26.00                 57014
8 26.50                 84146
9 27.00                 134578
10 27.50                202864
11 28.00                237015
12 30.00                251278
13 32.00                255234
14 35.00           258320
15 45.00                267324
16 100.00        322093

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Jeremiah D. Crossett
CleanTech Analytics
503-688-8951


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On Fri, Jun 22, 2012 at 4:14 PM, Jason Kirkpatrick <jason.alan.kirkpatrick@xxxxxxxxx> wrote:
 

I suggest that you try looking at the WaterHeater:Mixed and/or WaterHeater:Stratified objects as they have tank volume and you can modify the heat losses to account for the PCM

Hope this helps.

Jason



On Fri, Jun 22, 2012 at 4:33 AM, jones.aidant <jones.aidan.t@xxxxxxxxx> wrote:
 

I've been trying to model a PCM tank for heat storage. I thought it should be possible with new charge/discharge curves in the thermalstorage:ice:detailed module.

I'm finding that I can't get this to work, so though I would check if this is even possible with this module?

Is there of modifying this module slightly to operate as a heat store?

Thanks for your help

Aidan





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