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Division by zero error in valve models when using BaseClasses.PartialTwoWayValveKv

1. The Problem/Bug

When using AixLib.Fluid.Actuators.BaseClasses.PartialTwoWayValveKv or AixLib.Fluid.Actuators.BaseClasses.PartialTwoWayValve as base class within the valve models (e.g. if you don´t use a specific valve data set), model errors occur. The following valve models are affected (among maybe others):

  • AixLib.Fluid.Actuators.Valves.TwoWayEqualPercentage

  • AixLib.Fluid.Actuators.Valves.TwoWayLinear

  • AixLib.Fluid.Actuators.Valves.TwoWayPolynomial

  • AixLib.Fluid.Actuators.Valves.TwoWayPressureIndependent

  • AixLib.Fluid.Actuators.Valves.TwoWayQuickOpening

  • AixLib.Fluid.Actuators.Valves.TwoWayTable

2. How will I fix the problem?

In the IBPSA library a minimum value of 0.1*leakage rate was given for phi. This way, division by zero is prevented.