4. WANDA Liquid

In this part of the Help documentation all available hydraulic-components and nodes for the liquid domain are described. Each class description of the H-component contains the symbol, the list of types and the mathematical model. Each type description consists of the input list (with descriptions, dimensions and ranges), the H-component specific output list, the H-actions list and a list of error messages and explanations.

Please note that not all classes and types have to be present in your version of WANDA since some of them are optional.

With the introduction of Wanda 4 there are several types of liquid nodes available. They are explained in this chapter as well.

Note: The general annotation H-component and H-node must be read as Liquid component and Liquid node.

Contents

• 4.1. Overview of Liquid components
• 4.2. Modular concept of H-component properties
  • 4.2.1. Specify actions
• 4.3. Hydraulic nodes
  • 4.3.1. General
  • 4.3.2. Pressure definition for H-node
  • 4.3.3. Cavitation in H-node
  • 4.3.4. Standard output of H-node types
  • 4.3.5. Available H-node types
  • 4.3.6. H-node
  • 4.3.7. H-node with initial head
  • 4.3.8. H-node with conditional initial head
  • 4.3.9. H-node with demand
• 4.4. Air Vessel
  • 4.4.1. AIRVha (class)
    • 4.4.1.1. Mathematical model
  • 4.4.2. Airvessel horizontal vented
    • 4.4.2.1. Hydraulic specifications
    • 4.4.2.2. Component specific output
    • 4.4.2.3. H-actions
    • 4.4.2.4. Component messages
  • 4.4.3. AIRVhn (class)
    • 4.4.3.1. Mathematical model
  • 4.4.4. Airvessel horizontal non-vented
    • 4.4.4.1. Hydraulic specifications
    • 4.4.4.2. Component specific output
    • 4.4.4.3. H-actions
    • 4.4.4.4. Component messages
  • 4.4.5. AIRVva (class)
    • 4.4.5.1. Mathematical model
  • 4.4.6. Airvessel vertical vented
    • 4.4.6.1. Hydraulic specifications
    • 4.4.6.2. Component messages
  • 4.4.7. AIRVvn (class)
    • 4.4.7.1. Mathematical model
  • 4.4.8. Airvessel vertical non-vented
    • 4.4.8.1. Hydraulic specifications
    • 4.4.8.2. Component specific output
    • 4.4.8.3. H-actions
    • 4.4.8.4. Component messages
  • 4.4.9. Airvessel Vertical Hybrid (class)
    • 4.4.9.1. Mathematical model
  • 4.4.10. Airvessel vertical hybrid properties
    • 4.4.10.1. Hydraulic specifications
    • 4.4.10.2. Component specific output
    • 4.4.10.3. H-actions
    • 4.4.10.4. Example
    • 4.4.10.5. Component messages
• 4.5. Boundary Conditions
  • 4.5.1. BOUNDH (class)
    • 4.5.1.1. Mathematical model
  • 4.5.2. BOUNDH (reservoir)
    • 4.5.2.1. Hydraulic specifications
    • 4.5.2.2. Component specific output
    • 4.5.2.3. H-actions
    • 4.5.2.4. Component messages
  • 4.5.3. BOUNDQ (class)
    • 4.5.3.1. Mathematical model
  • 4.5.4. BOUNDQ (reservoir)
    • 4.5.4.1. Hydraulic specifications
    • 4.5.4.2. Component specific output
    • 4.5.4.3. H-actions
    • 4.5.4.4. Component messages
• 4.6. Channel
  • 4.6.1. Channel (class)
    • 4.6.1.1. Mathematical model
  • 4.6.2. Channel
    • 4.6.2.1. Hydraulic specifications
    • 4.6.2.2. Component specific output
    • 4.6.2.3. H-actions
    • 4.6.2.4. Component messages
• 4.7. Checkvalve
  • 4.7.1. CHECKV (class)
    • 4.7.1.1. Mathematical models
  • 4.7.2. Checkvalve (ideal)
    • 4.7.2.1. Hydraulic specifications
    • 4.7.2.2. Component specific output
    • 4.7.2.3. H-actions
    • 4.7.2.4. Component messages
  • 4.7.3. Checkvalve (deltaP for reopen)
    • 4.7.3.1. Hydraulic specifications
    • 4.7.3.2. Component specific output
    • 4.7.3.3. H-actions
    • 4.7.3.4. Component messages
  • 4.7.4. CHECKV - undamped
    • 4.7.4.1. Hydraulic specifications
    • 4.7.4.2. Component specific output
    • 4.7.4.3. H-actions
    • 4.7.4.4. Component messages
    • 4.7.4.5. Example
  • 4.7.5. CHECKV - undamped (dimensionless)
    • 4.7.5.1. Hydraulic specifications
    • 4.7.5.2. Component specific output
    • 4.7.5.3. H-actions
    • 4.7.5.4. Component messages
    • 4.7.5.5. Example
• 4.8. Collector
  • 4.8.1. Collector (class)
    • 4.8.1.1. Mathematical model
  • 4.8.2. Collector
    • 4.8.2.1. Hydraulic specifications
    • 4.8.2.2. Component specific output
    • 4.8.2.3. H-actions
    • 4.8.2.4. Component messages
    • 4.8.2.5. Example
• 4.9. Conduit
  • 4.9.1. Free surface flow conduit
    • 4.9.1.1. Mathematical model
    • 4.9.1.2. Geometry
    • 4.9.1.3. Hydraulic specifications
    • 4.9.1.4. Component specific output
    • 4.9.1.5. H-actions
    • 4.9.1.6. Example
• 4.10. Control valve
  • 4.10.1. FCV
    • 4.10.1.1. Mathematical model
    • 4.10.1.2. Hydraulic specifications
    • 4.10.1.3. Component specific output
    • 4.10.1.4. H-actions
    • 4.10.1.5. Component messages
    • 4.10.1.6. Example
  • 4.10.2. PdCV
    • 4.10.2.1. Mathematical model
    • 4.10.2.2. Hydraulic specifications
    • 4.10.2.3. Component specific output
    • 4.10.2.4. H-actions
    • 4.10.2.5. Component messages
    • 4.10.2.6. Example
  • 4.10.3. PuCV
    • 4.10.3.1. Mathematical model
    • 4.10.3.2. Hydraulic specifications
    • 4.10.3.3. Component specific output
    • 4.10.3.4. H-actions
    • 4.10.3.5. Component messages
    • 4.10.3.6. Example
• 4.11. Damper, Surge vessel
  • 4.11.1. Damper, Surge vessel
    • 4.11.1.1. Mathematical model
    • 4.11.1.2. Hydraulic specifications
    • 4.11.1.3. Component specific output
• 4.12. Dynamic air valve with water release
  • 4.12.1. DYNAIRVA (class)
    • 4.12.1.1. Mathematical model
    • 4.12.1.2. Closing of the air valve
    • 4.12.1.3. Initial states
  • 4.12.2. Dynamic air valve properties
    • 4.12.2.1. Hydraulic specifications
    • 4.12.2.2. Component specific output properties
    • 4.12.2.3. Component messages
  • 4.12.3. Examples
    • 4.12.3.1. Outflow table
    • 4.12.3.2. Inflow table
• 4.13. Fast filling pipe
  • 4.13.1. PIPE FFP (class)
    • 4.13.1.1. Mathematical model
  • 4.13.2. Fast filling pipe properties
    • 4.13.2.1. Hydraulic specifications
    • 4.13.2.2. Component specific output
• 4.14. Inclined Air Vessel
  • 4.14.1. Inclined air vessel (class)
    • 4.14.1.1. Mathematical model
  • 4.14.2. Airvessel inclined non-vented
    • 4.14.2.1. Hydraulic specifications
    • 4.14.2.2. Component specific output
    • 4.14.2.3. H-actions
    • 4.14.2.4. Example
    • 4.14.2.5. Component messages
• 4.15. Infinite Pipe
  • 4.15.1. INFPIP (class)
    • 4.15.1.1. Mathematical model
  • 4.15.2. Infinit Pipe (H-bound)
    • 4.15.2.1. Hydraulic specifications
    • 4.15.2.2. Component specific output
    • 4.15.2.3. H-actions
    • 4.15.2.4. Component messages
  • 4.15.3. Infinit Pipe (Q-bound)
    • 4.15.3.1. Hydraulic specifications
    • 4.15.3.2. Component specific output
    • 4.15.3.3. H-actions
    • 4.15.3.4. Component messages
• 4.16. Merger
  • 4.16.1. Mathematical model
    • 4.16.1.1. Positive flow definition
    • 4.16.1.2. Flow regimes
    • 4.16.1.3. Equations
  • 4.16.2. Merger properties
• 4.17. ORIFICE
  • 4.17.1. ORIFICE (class)
    • 4.17.1.1. Mathematical model
  • 4.17.2. Orifice plate
    • 4.17.2.1. Hydraulic specifications
    • 4.17.2.2. Component specific output
    • 4.17.2.3. H-actions
    • 4.17.2.4. Component messages
• 4.18. PIPE
  • 4.18.1. Pressurised pipe
    • 4.18.1.1. Mathematical model
  • 4.18.2. Pressurised pipe Properties
    • 4.18.2.1. Cross section
    • 4.18.2.2. Additional losses
    • 4.18.2.3. Geometry
    • 4.18.2.4. Hydraulic specifications
    • 4.18.2.5. Component specific output
    • 4.18.2.6. H-actions
    • 4.18.2.7. Example
• 4.19. Pressure relief valve
  • 4.19.1. PRV (class)
    • 4.19.1.1. Mathematical model
  • 4.19.2. PRV (simplified char.)
    • 4.19.2.1. Hydraulic specifications
    • 4.19.2.2. Component specific output
    • 4.19.2.3. H-actions
    • 4.19.2.4. Component messages
  • 4.19.3. PRV (Ideal)
    • 4.19.3.1. Hydraulic specifications
    • 4.19.3.2. Component specific output
    • 4.19.3.3. H-actions
    • 4.19.3.4. Component messages
• 4.20. Pump
  • 4.20.1. PUMP (class)
    • 4.20.1.1. Mathematical model
    • 4.20.1.2. The pump model for N≥0 (QHE table)
    • 4.20.1.3. The complete pump model
    • 4.20.1.4. Determination of the new pump speed
    • 4.20.1.5. Motor drive
  • 4.20.2. Pump properties
    • 4.20.2.1. Hydraulic specifications
    • 4.20.2.2. Component messages
    • 4.20.2.3. Component specific output
    • 4.20.2.4. H-actions
• 4.21. Pump Energy
  • 4.21.1. Pump Energy components
    • 4.21.1.1. Mathematical model
  • 4.21.2. PUMPSCEN (Pump Scenario)
    • 4.21.2.1. Input specifications
    • 4.21.2.2. Output specifications
  • 4.21.3. Q_PATTRN (discharge pattern)
    • 4.21.3.1. Input properties
    • 4.21.3.2. Output properties
  • 4.21.4. Q_FREQ (discharge frequency)
    • 4.21.4.1. Input properties
    • 4.21.4.2. Output properties
  • 4.21.5. SYSCHAR (System characteristic)
    • 4.21.5.1. Input properties
    • 4.21.5.2. Output properties
    • 4.21.5.3. Example
• 4.22. PUMPSS
  • 4.22.1. PUMPSS (class)
    • 4.22.1.1. Mathematical model
  • 4.22.2. PUMPSS (Piston Pump)
    • 4.22.2.1. Hydraulic specifications
    • 4.22.2.2. Component specific output
    • 4.22.2.3. H-actions
    • 4.22.2.4. Component messages
• 4.23. QSCHAR
  • 4.23.1. QSCHAR (Class)
    • 4.23.1.1. Mathematical model
    • 4.23.1.2. Hydraulic model aspects
  • 4.23.2. QSCHAR (BoundQ for system characteristic)
    • 4.23.2.1. Hydraulic specifications
    • 4.23.2.2. Component specific output
    • 4.23.2.3. H-actions
    • 4.23.2.4. Component messages
• 4.24. Reservoir
  • 4.24.1. RSVOIR (class)
    • 4.24.1.1. Mathematical model
  • 4.24.2. RSVOIR (reservoir)
    • 4.24.2.1. Hydraulic specifications
    • 4.24.2.2. Component specific output
    • 4.24.2.3. H-actions
    • 4.24.2.4. Component messages
• 4.25. Resistance
  • 4.25.1. RESIST (class)
    • 4.25.1.1. Mathematical model
  • 4.25.2. Resist quadr. xi
    • 4.25.2.1. Hydraulic specifications
    • 4.25.2.2. Component specific output
    • 4.25.2.3. H-actions
    • 4.25.2.4. Component messages
  • 4.25.3. Resist quadr. C
    • 4.25.3.1. Hydraulic specifications
    • 4.25.3.2. Component specific output
    • 4.25.3.3. H-actions
    • 4.25.3.4. Component messages
  • 4.25.4. Resist linear C
    • 4.25.4.1. Hydraulic specifications
    • 4.25.4.2. Component specific output
    • 4.25.4.3. H-actions
    • 4.25.4.4. Component messages
  • 4.25.5. Resist quadr. Initial Q
    • 4.25.5.1. Hydraulic specifications
    • 4.25.5.2. Component specific output
    • 4.25.5.3. H-actions
    • 4.25.5.4. Component messages
  • 4.25.6. Resist 2-way quadr.xi
    • 4.25.6.1. Hydraulic specifications
    • 4.25.6.2. Component specific output
    • 4.25.6.3. H-actions
    • 4.25.6.4. Component messages
  • 4.25.7. Resistance polynomial
    • 4.25.7.1. Mathematical model
    • 4.25.7.2. Hydraulic specifications
    • 4.25.7.3. Component specific output
    • 4.25.7.4. H-actions
    • 4.25.7.5. Component messages
    • 4.25.7.6. Example
• 4.26. Shaft
  • 4.26.1. Mathematical model
  • 4.26.2. Hydraulic specifications
• 4.27. Splitter
  • 4.27.1. Mathematical model
    • 4.27.1.1. Positive flow definition
    • 4.27.1.2. Flow regimes
    • 4.27.1.3. Equations
  • 4.27.2. Splitter properties
• 4.28. Surge tower, surge shaft
  • 4.28.1. SURGTW (class)
    • 4.28.1.1. Mathematical model
  • 4.28.2. Surgetower constant area
    • 4.28.2.1. Hydraulic specifications
    • 4.28.2.2. Component specific output
    • 4.28.2.3. H-actions
    • 4.28.2.4. Component messages
  • 4.28.3. Surgetower height dep. area
    • 4.28.3.1. Hydraulic specifications
    • 4.28.3.2. Component specific output
    • 4.28.3.3. H-actions
    • 4.28.3.4. Component messages
• 4.29. T-JUNCTION
  • 4.29.1. Mathematical model
    • 4.29.1.1. Positive flow definition
    • 4.29.1.2. Flow regimes
    • 4.29.1.3. Equations
    • 4.29.1.4. Resistance coefficients based on formulas
  • 4.29.2. T-Junction properties
    • 4.29.2.1. Properties T-junction straight
    • 4.29.2.2. Properties T-junction branch
• 4.30. TANK
  • 4.30.1. TANK (class)
    • 4.30.1.1. Mathematical model
  • 4.30.2. TANK (constant pressure)
    • 4.30.2.1. Hydraulic specifications
    • 4.30.2.2. Component specific output
    • 4.30.2.3. H-actions
    • 4.30.2.4. Component messages
• 4.31. Tap point / distribution area
  • 4.31.1. TAP (class)
    • 4.31.1.1. Mathematical model
  • 4.31.2. Tap return flow
    • 4.31.2.1. Hydraulic specifications
    • 4.31.2.2. Component specific output
    • 4.31.2.3. H-actions
    • 4.31.2.4. Component messages
  • 4.31.3. Tap non-return flow
    • 4.31.3.1. Hydraulic specifications
    • 4.31.3.2. Component specific output
    • 4.31.3.3. H-actions
    • 4.31.3.4. Component messages
  • 4.31.4. Tap non-return flow with DP reopen
    • 4.31.4.1. Hydraulic specifications
    • 4.31.4.2. Component specific output
    • 4.31.4.3. H-actions
    • 4.31.4.4. Component messages
• 4.32. Turbine
  • 4.32.1. Turbine (class)
    • 4.32.1.1. Mathematical model
    • 4.32.1.2. Turbine data curves
  • 4.32.2. Turbine model
    • 4.32.2.1. Hydraulic specifications
    • 4.32.2.2. Component specific output
    • 4.32.2.3. H-actions
    • 4.32.2.4. Component messages
  • 4.32.3. Examples
    • 4.32.3.1. Model description
    • 4.32.3.2. Finding the equilibrium speed for a specified P_abs
    • 4.32.3.3. Varying the absorbed power P_abs
    • 4.32.3.4. Varying the vane position
    • 4.32.3.5. More realistic example
• 4.33. VALVE
  • 4.33.1. Valve (class)
    • 4.33.1.1. Mathematical model
  • 4.33.2. Valve properties
    • 4.33.2.1. Hydraulic specifications
    • 4.33.2.2. Component specific output
    • 4.33.2.3. H-actions
    • 4.33.2.4. Component messages
• 4.34. Vee notch Weir
  • 4.34.1. V-weir (class)
    • 4.34.1.1. Mathematical model
  • 4.34.2. Vee notch Weir
    • 4.34.2.1. Hydraulic specifications
    • 4.34.2.2. Component specific output
    • 4.34.2.3. H-action
    • 4.34.2.4. Component messages
    • 4.34.2.5. Example
• 4.35. Vent, Air valve
  • 4.35.1. VENT (class)
    • 4.35.1.1. Mathematical model
  • 4.35.2. VENT (discharge coeff.)
    • 4.35.2.1. Hydraulic specifications
    • 4.35.2.2. Component specific output
    • 4.35.2.3. H-actions
    • 4.35.2.4. Component messages
    • 4.35.2.5. Example
  • 4.35.3. VENT (inflow/outflow char.)
    • 4.35.3.1. Hydraulic specifications
    • 4.35.3.2. Component specific output
    • 4.35.3.3. H-actions
    • 4.35.3.4. Component messages
• 4.36. Vent, Air valve with filling pipe section
  • 4.36.1. VENT2LEG (class)
    • 4.36.1.1. Mathematical model
  • 4.36.2. VENT2LEG properties
    • 4.36.2.1. Hydraulic specifications
    • 4.36.2.2. Component specific output
    • 4.36.2.3. H-actions
    • 4.36.2.4. Component messages
• 4.37. Venturi
  • 4.37.1. Venturi (class)
    • 4.37.1.1. Mathematical model
  • 4.37.2. Venturi_open
    • 4.37.2.1. Hydraulic specifications
    • 4.37.2.2. Component specific output
    • 4.37.2.3. H-actions
    • 4.37.2.4. Component messages
• 4.38. Weir
  • 4.38.1. WEIR (class)
    • 4.38.1.1. Mathematical model
    • 4.38.1.2. Discharge coefficient
  • 4.38.2. WEIR (two way)
    • 4.38.2.1. Hydraulic specifications
    • 4.38.2.2. Component specific output
    • 4.38.2.3. H-actions
    • 4.38.2.4. Component messages
  • 4.38.3. WEIR_S (class)
    • 4.38.3.1. Mathematical model
  • 4.38.4. Outlet WEIR (incl. storage)
    • 4.38.4.1. Hydraulic specifications
    • 4.38.4.2. Component specific output
    • 4.38.4.3. H-actions
    • 4.38.4.4. Component messages
• 4.39. X-JUNCTION
  • 4.39.1. Mathematical model
    • 4.39.1.1. Positive flow definition
    • 4.39.1.2. Flow regimes
    • 4.39.1.3. Equations
    • 4.39.1.4. Resistance coefficients based on formulas
  • 4.39.2. X-Junction properties
    • 4.39.2.1. Properties X-junction (merging and dividing type)
• 4.40. Y-JUNCTION
  • 4.40.1. Mathematical model
    • 4.40.1.1. Positive flow definition
    • 4.40.1.2. Flow regimes
    • 4.40.1.3. Equations
    • 4.40.1.4. Resistance coefficients based on formulas
  • 4.40.2. Y-Junction properties
    • 4.40.2.1. Properties Y-junction (combining and dividing type)