.Modelica.Thermal.HeatTransfer.Sensors.ConditionalFixedHeatFlowSensor .Modelica.Thermal.HeatTransfer.Sensors.ConditionalFixedHeatFlowSensorIf useFixedTemperature = false, this sensor acts just as a normal HeatFlowSensor.
If useFixedTemperature = true, it is assumed that the connections to both heatPorts of this sensor are conditionally removed; in this case, the measured Q_flow is reported = 0 automatically. To avoid a singular equation system, the temperature of the sensor is set to 293.15 K.