[TRNSYS-users] Tank Temperature Beyond Boiling (Matt Duffy)

[David BRADLEY]

Brad,
   There is not a model (to my knowledge) that combines the energy 
dumping feature of Types4 and 60 with the more robust HX model in 
Type534. It is best to handle the situation using external controls as 
would probably be done in a real system being designed and built.
kind regards,
  David


On 06/15/2015 17:17, Bradley Painting wrote:
> Matt,
>
> It isn't that I am trying to limit heat transfer to the tank, but that 
> it is not realistic to have a tank of water over the boiling 
> temperature. In tank type 4 or 60 you can set the boiling temperature 
> so that even if heat is added to it as at nears boiling, the component 
> will process the excess heat as being lost as steam. It seems like 
> there would be an easier way to do this than with an external control.
>
> If not, is there another tank type that simulates boiling, has an 
> internal heat exchanger, and doesn't have any major known issues? Thanks!
>
>
>     ---------- Forwarded message ----------
>     From: Matt Duffy <mduffy at aeieng.com <mailto:mduffy at aeieng.com>>
>     To: "TRNSYS users mailing list at OneBuilding.org"
>     <trnsys-users at lists.onebuilding.org
>     <mailto:trnsys-users at lists.onebuilding.org>>
>     Cc:
>     Date: Mon, 15 Jun 2015 13:57:58 +0000
>     Subject: Re: [TRNSYS-users] Tank Temperature Beyond Boiling
>
>     Brad,
>
>     The TESS Type534 does not have any built-in heating elements or
>     heating energy sources. It can only have the temperature increase
>     if something “upstream” (or a constant input value for the
>     component), an input, is adding energy to the tank. I suggest you
>     look closely at the components that are adding energy to the tank
>     and perhaps limit that(with some kind of controller) to prevent
>     excessive tank temperatures.
>
>     Cheers,
>
>     Matt
>
>     *Matt Duffy***
>     Sustainable
>
>     	
>
>     	
>
>     *AEI*| AFFILIATED ENGINEERS, INC.
>     5802 Research Park Boulevard | Madison, WI  53719
>
>     P: 608.236.1207 <tel:608.236.1207> | F: 608.238.2614
>     <tel:608.238.2614>
>     mduffy at aeieng.com <mailto:mduffy at aeieng.com> | *www.aeieng.com
>     <http://www.aeieng.com>*
>
>     *From:*TRNSYS-users
>     [mailto:trnsys-users-bounces at lists.onebuilding.org
>     <mailto:trnsys-users-bounces at lists.onebuilding.org>] *On Behalf Of
>     *Bradley Painting
>     *Sent:* Saturday, June 13, 2015 10:13 PM
>     *To:* trnsys-users at lists.onebuilding.org
>     <mailto:trnsys-users at lists.onebuilding.org>
>     *Subject:* [TRNSYS-users] Tank Temperature Beyond Boiling
>
>     Hi,
>
>     Does anyone know how to limit the fluid temperature of the
>     vertical cylindrical tank 534-coiled (from TESS library)? It is
>     getting up to about 130 °C. I can't find a parameter to limit
>     this. I was using Type 60c but ran into a bug and technical
>     support suggested I use this model because it has fewer issues.
>
>     -- 
>
>     Brad Painting
>
>     Master of Science Candidate, Renewable Energy Engineering
>
>     Department of Technology & Environmental Design
>
>     Appalachian State University
>
>     Boone, NC  28608
>
>
>     _______________________________________________
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>
>
>
>
> -- 
>
> Brad Painting
>
> Master of Science Candidate, Renewable Energy Engineering
>
> Department of Technology & Environmental Design
>
> Appalachian State University
>
> Boone, NC  28608
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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