[TRNSYS-users] For Help！About using R134a in collector module Type74

[David BRADLEY]

Li,

  I am not sure whether or not anyone responded to your question. You 
would definitely have to write a new collector model or begin with 
Type74 and modify the code extensively. You would need to determine at 
what point in the collector the liquid begins to vaporize and you would 
need to make a call to the FluidProperties routine to determine the 
properties (temperature, enthalpy, density, etc.) of the R134A as it 
travels through the collector.

kind regards,

  David


On 02/27/2020 01:44, Guanming Li via TRNSYS-users wrote:
> Dear TRNSYS users,
>
> Thanks for your help!
> Only the specific heat capacity is set in the collector module, but if 
> I want to use R134a, the working medium will undergo a phase change in 
> the collector, and the specific heat capacity will also change.
> I want to ask for help, how to use this working medium in a collector 
> for a direct expansion solar heat pump?
>
> Best regards！
>
> Guanming Li
>
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> TRNSYS-users at lists.onebuilding.org
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
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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