[TRNSYS-users] Cooling power to water flow?

[David BRADLEY]

Santeri,
   I am not sure whether anyone responded to your post. However, there 
is a component in the TESS Loads and Structures library that does 
exactly this. You have to save the Excel file as text (comma or tab 
delimited) and read it into your simulation using Type9. You then take 
these loads and pass them to Type682.

   If you do not have access to the component in question, you can 
always read the load in using Type9, then use an equation (Tout = Tin + 
q/m_dot/Cp) to get the return water temperature. You have to be a little 
careful using this equation because there is some inlet temperature 
above which you cannot realistically provide cooling. For example, if 
Tin is 30C and you are trying to maintain your space at 20C, there isn't 
any way you can provide cooling to the space. Type682 (for Trnsys17) 
provides that checking automatically.
Best,
  David


On 4/26/2012 04:31, Santeri Siren wrote:
> Dear all,
>
> I need to simulate cooling power that chances over time and affects a 
> water flow. I have the cooling powers that I need to use in an excel 
> file. So I need a component that reads the powers from excel as an 
> input and deliveres them to the water flow. The inlet temperature of 
> the water flow also changes over time. Is there any simple way to do this?
>
> It seems that the basic auxiliary cooler cant be used in this case 
> because it has a rated power that can not be read as a changing input.
>
> Best regards. Santeri Siren
>
>
> _______________________________________________
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> TRNSYS-users at cae.wisc.edu
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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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