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GetSpecificHeatGlycol: Temperature is out of range error with loops when there's no glycol in the loop

asked 2020-10-23 04:17:56 -0500

Jean Marais gravatar image

updated 2020-10-24 11:02:09 -0500

Does anybody get this error with loops when there's no glycol in the loop?

 ** Warning ** GetSpecificHeatGlycol: Temperature is out of range (too high) for fluid [WATER] specific heat **
 **   ~~~   ** ..Called From:PlantLoopSolver::EvaluateLoopSetPointLoad,Temperature=[125.00], supplied data range=[0.00,125.00]
 **   ~~~   **  Environment=KEITHSTRASSE (2O-12:26-12), at Simulation time=12/20 00:00 - 00:10
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answered 2020-10-23 10:49:22 -0500

updated 2020-10-23 11:01:45 -0500

The GetSpecificHeatGlycol algorithm in EnergyPlus is called to check the fluid properties for ANY plant loop where a liquid circulates -- even if that loop doesn't contain glycol. You can see this reflected in your warning line:

* Warning * GetSpecificHeatGlycol: Temperature is out of range (too high) for fluid [WATER]

You can see the EnergyPlus source code where this algorithm is defined here. In your case, a water plant loop is experiencing a temperature of 125 $^o C$, which is above water's boiling temperature. This could be happening during no- or low-flow periods, and you can read more about this in other posts here and here and here.

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Asked: 2020-10-23 04:17:56 -0500

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Last updated: Oct 23 '20