[EnergyPlus_Support] Re: Continued Heat Pump Woes

["JV Dirkes II" <jvd2pe@xxxxxxx>]

Dear Judith,

I have NOT used that heat pump system.  Your errors, though, suggest that:
1) You do not have enough capacity to get rid of heat.  The high
pressure / high inlet side temp error probably occurs in the fall or
late summer when you've spent the previous month or so adding heat to
the borefield and the surrounding earth is now warmed up and unable to
take any more energy.
2) Perhaps the borefield is just too small and the same problem is
occurring in the winter.  The theory would be that not only do you
overheat it in the summer, but cool it too quickly in the winter.

That's my "Armchair quarterback" opinion of the day.  Hope it helps!


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Judith Peters
<jdth_peters@...> wrote:
>
> Dear Forum,
>  
> I am still having difficulty with water-to-air heat pumps and am
running up against a deadline.
>  
> I get the following error messages:
>  
>  Warning ** WaterToAir Heat pump:cooling [HEAT PUMP COOLING MODE
AHU4] shut off on high pressure > 4000000
>    *************  **   ~~~   **   This error occurred 30541 times.
>    *************  **   ~~~   **   Max=63.178048
SourceSideInletTemp[C]  Min=55.560386 SourceSideInletTemp[C]
>    *************
>  
> ** Warning ** GetDensityGlycol: Temperature is out of range (too
low) for glycol density
>    *************  **   ~~~   **   This error occurred 38283 times.
>    *************  **   ~~~   **   Max=-1.863618E-002 {C} 
Min=-3.581789 {C}
>    *************
>    *************  ** Warning ** GetSpecificHeatGlycol: Temperature
out of range (too low) for glycol specific heat
>    *************  **   ~~~   **   This error occurred 72132 times.
>    *************  **   ~~~   **   Max=-1.863618E-002 {C} 
Min=-3.581789 {
>  
> I don't have any severe errors, but I have several hundred thousand
warnings and results that are not logical.
>  
> Thank you.
>  
> Judy
>  
>  
>



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