Re: [TRNSYS-users] TYPE 504 Part Load Performance

[David Bradley <bradley@tess-inc.com>]

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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