This result does not look to be a major issue, certainly not one that would affect the simulation results. Since the load is 3 4 W, the model has difficulty converging on a solution. A real system would not even turn on to meet a load this small since the thermostat would not activate the baseboard. An additional complexity is that the water mass flow rate is very near a no flow condition and the model may choose to disable the baseboard one iteration and allow it to operate another, making convergence impossible.

This result does not look to be a major issue, certainly not one that would affect the simulation results. issue. Since the load is 4 W, 4W, the model has difficulty converging on a solution. A real system would not even turn on to meet a load this small since the thermostat would not activate the baseboard. An additional complexity is that the water mass flow rate is very near a no flow condition and the model may choose to disable the baseboard one iteration and allow it to operate another, making convergence impossible.