Unexplained Water Temperature Out of Range Warnings in EnergyPlus
I have a model with three plant loops: one for space heating, one for space cooling, and one for domestic hot water. I'm getting large numbers of the following warnings:
* Warning * GetSpecificHeatGlycol: Temperature is out of range (too high) for fluid [WATER] specific heat *
* ~~~ * ..Called From:PlantLoopSolver::UpdateAnyLoopDemandAlterations,Temperature=[5024.90], supplied data range=[0.00,125.00]
* ~~~ * Environment=RUN PERIOD 1, at Simulation time=01/01 21:15 - 21:30
* Warning * GetSpecificHeatGlycol: Temperature is out of range (too low) for fluid [WATER] specific heat supplied values *
* ~~~ * ..Called From:PlantLoopSolver::UpdateAnyLoopDemandAlterations,Temperature=[-43.64], supplied data range=[0.00,125.00]
* ~~~ * Environment=RUN PERIOD 1, at Simulation time=01/02 14:00 - 14:15
I've seen similar warnings before and they usually indicate that plant loop temperatures are outside of intended range. I looked at detailed timestep data for each plant loop, however, and I don't see any indication that my loops are not controlling properly. If my plant loop supply side inlet and outlet temperatures look normal, what else could be causing these warnings?
Might be worth reporting out ALL the node temps and flow rates for each plant loop. Maybe you're hitting these temps in one of the bypass branches when there is really low flow or something.