.AixLib.Fluid.BoilerCHP.ModularCHP.BaseClasses.ExhaustHeatExchanger.Medium4 .AixLib.Fluid.BoilerCHP.ModularCHP.BaseClasses.ExhaustHeatExchanger.Medium4package Medium4 = DataBase.CHP.ModularCHPEngineMedia.CHPCoolantPropyleneGlycolWater(property_T = 356, X_a = 0.50);