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Re: [EnergyPlus_Support] GroundHeatExchanger:Vertical



Edwin,

Thanks for your reply. How do I calculate the G-function values? Are there any specifics on that? I have been using the ones in the example file for now.

On Fri, Apr 1, 2011 at 10:38 AM, Edwin Lee <leeed2001@xxxxxxxxx> wrote:
 

Vinay:


Check all your inputs.  Make sure the plant flow rate is being sized to the same flow rate as the pump and the GLHE.  Also, make sure your g-function values are based on that same flow rate as well.  This often occurs when there is a mismatched flow rate (the glhe runs for a while, then suddenly stops), so you may want to try running the loop under a constant flow rate, to at least diagnose that this is actually the problem.

Edwin


On Thu, Mar 31, 2011 at 15:12, Vinay Devanathan <vinay.devanathan@xxxxxxxxx> wrote:
 

Has anyone come across this error before?


---------------

  ** Warning ** GetSpecificHeatGlycol: Temperature is out of range (too low) for glycol specific heat **
   **   ~~~   ** ..Called From:CalcHPCoolingSimple:SourceSideInletTemp Glycol=WATER,Temperature=-10.50
   **   ~~~   **  Environment=WATERTOWN AP ANN HTG 99.6% CONDNS DB, at Simulation time=01/21 00:00 - 00:15
   ** Warning ** Check GLHE design inputs & g-functions for consistency
   **   ~~~   ** For GroundHeatExchanger:Vertical VERTICAL GROUND HEAT EXCHANGERGLHE delta Temp > 100C.
   **   ~~~   ** This can be encountered in cases where the GLHE mass flow rate is either significantly
   **   ~~~   **  lower than the design value, or cases where the mass flow rate rapidly changes.
   **   ~~~   ** Glhe Current Flow Rate=0.329; Glhe Design Flow Rate=0.329

-----------------

Is there anything that I am doing wrong causes this error? Any possible fix?

Hope to hear from someone.

Thank you.





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