type MassFlowQuantities = enumeration(m_flow_kgps "Mass flow rate (kg/s)", m_flow_gps "Mass flow rate (g/s)", V_flow_m3ps "Volume flow rate (m3/s)", V_flow_lpMin "Volume flow rate (l/min)", H_flow_Jps "Enthalpy flow rate (W)", S_flow_JpKs "Entropy flow rate (W/K)", Cp_flow_JpKs "Heat capacity flow rate (W/K)");