[TRNSYS-users] TYPE 504 Part Load Performance

[David Bradley]

Mike,
 I saw another email to the TESS techsupport website about this (from 
your colleague Morgan) and asked that you send me the *.tpf file and the 
heat pump's external data files so that I can track down the cause of 
the behavior that you are seeing.
Regards,
 David


Mike Matheus wrote:
>
> We are modeling a water source heat pump using TYPE 504 and have found 
> that if the Fraction of Rated Heating Capacity (Input 28) is below 
> about 0.40, the heat pump will not transfer any heat to the air.  The 
> HP power output gives values, we have a heating control of 1, and have 
> proper air and water flows, but no heat is delivered to the air.  When 
> the Fraction of rated heating capacity is above 0.40, everything works 
> fine.
>
>  
>
> Has anyone had this issue in the past?  Is there a way to correct it?
>
>  
>
> Thanks,
>
>  
>
> Mike Matheus
>
>  
>
> ------------------------------------------------------------------------
>
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-- 
***********************************************************************
Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      22 N. Carroll Street - Suite 370 
Partner                            Madison, WI 53703 
                                   USA
P: +1.608.274.2577 
F: +1.608.278.1475
E-mail: bradley at tess-inc.com 
Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

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