Question-and-Answer Resource for the Building Energy Modeling Community
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I've run a test with the model and what's happening is that the temperature of the geothermal wells (Ground Heat Exchanger Average Fluid Temperature of OS:GroundHeatExchanger:Vertical) is exceeding the Maximum Outdoor Temperature in Cooling Mode you've set for the OS:AirConditioner:VariableRefrigerantFlow (that is set to 43ºC).
When this temperature condition happens the system shuts down (as expected); testing it with a temperature of 80ºC (which doesn't make any sense) and using Barcelona EPW climate the system works all year round.
In any case the problem (at least) is with the sizing of the required dissipation of the ground heat exchangers, which are currently undersized (for example in Barcelona it can climb up to 78ºC in August...). I hope this is useful.
Maximum Outdoor Temperature in Cooling Mode = 43ºC
Maximum Outdoor Temperature in Cooling Mode = 80ºC
