Modelon Ab · OMXSTO:MODEL

Modelon Ab — Technical Presentation (2021)

34 slides from Modelon Ab's technical presentation, 2021

  1. Slide 1: Air Conditioning Library Overview

    AIR CONDITIONING LIBRARY Overview ©2021 Modelon.

  2. Slide 2: Agenda

    AGENDA ❑ About Air Conditioning Library ❑ Key Features ❑ Key Capabilities ❑ Key Applications ❑ Library Contents ❑ Modelon Compatibility ❑ Latest Release ©2021 Modelon. 2

  3. Slide 3: About Air Conditioning Library

    ABOUT AIR CONDITIONING LIBRARY • Library for refrigeration systems based on the open Modelica Standard with access to model source code • Release of Air Conditioning Library 1.0 in December 2004 with strong focus on automotive applications • Standard for model exchange process between automotive OEM

  4. Slide 4: Key Benefits

    KEY BENEFITS ©2021 Modelon. 4

  5. Slide 5: Key Benefits

    KEY BENEFITS • Modelica library by Modelon with access to source-code • Model library for refrigeration applications and other vapor compression cycles, focus on automotive Air-conditioning systems • Both transient and steady-state simulation with the same model • Easy-to-use templates that can be a

  6. Slide 6: Key Capabilities

    KEY CAPABILITIES ©2021 Modelon. 6

  7. Slide 7: Key Capabilities

    KEY CAPABILITIES • Domains • Automotive and residential air- conditioning • Stationary refrigeration and heat pumps • Applications • System integration, incl. model exchange between supplier and OEM • Controller design • Virtual testing - e.g. fuel consumption in standard driving cycles • Heat excha

  8. Slide 8: Key Applications

    KEY APPLICATIONS ©2021 Modelon. 8

  9. Slide 9: Key Applications

    KEY APPLICATIONS • Vapor Compression Cycle • Twin Evaporator Cycle • Vapor Cycle with Cabin • Component Test Rig 2018-08-08 ©2021 Modelon. 9

  10. Slide 10: Example: Vapor Compression Cycle

    EXAMPLE: VAPOR COMPRESSION CYCLE Transcritical refrigeration circuit with low pressure side accumulator and internal heat exchanger. The refrigerant is CO2 (R744). The system can be run with different transient air and compressor boundary conditions and used as a starting point to add controls. ©202

  11. Slide 11: Example: Twin Evaporator Cycle

    EXAMPLE: TWIN EVAPORATOR CYCLE A splitter divides the refrigerant flow between two cooling capacity consumers depending on valve positions. Working fluid is R134a. In a similar way more complex systems with more branches can be set up ©2021 Modelon. 11

  12. Slide 12: Example: Vapor Cycle with Cabin

    EXAMPLE: VAPOR CYCLE WITH CABIN A complete vapor compression system is included as a component in an air conditioning system with a simple cabin model. The compressor displacement is controlled to obtain the set-point value of the outlet air temperature from the evaporator. ©2021 Modelon. 12

  13. Slide 13: Example: Component Test Rig

    EXAMPLE: COMPONENT TEST RIG CondenserTestbench • Starting point for component experiments – e.g. for calibration or validation with experimental data • Test component can be replaced with customized component • Easy to perform typical design scenarios with FMI Add-in for CompressorTestbench Excel, o

  14. Slide 14: Library Contents

    LIBRARY CONTENTS ©2021 Modelon. 14

  15. Slide 15: Library Contents

    LIBRARY CONTENTS • Pre-defined system and component experiments • Heat exchangers • Pipes and volumes • Joins and splits • Compressors and fans • Valves and flow resistances • Sensors • Visualizers ©2021 Modelon. 15

  16. Slide 16: Library Contents: Air Handling

    LIBRARY CONTENTS Air Handling • AirDuct • IdealFan & AxialFan • SimpleCabin • ByPassValve • SimpleRoom • AirHeater • MultiportVolume • Split & Joint ©2021 Modelon. 16

  17. Slide 17: Library Contents: Compressors

    LIBRARY CONTENTS Compressors • Modelling approach • Quasi-steady state • Mass flow and change of enthalpy are calculated by algebraic equations • Displacement volume, if applicable, can be controlled by an external signal • Parameterization • User input as non-linear approximation functions or tabul

  18. Slide 18: Library Contents: Cycles

    LIBRARY CONTENTS Cycles • VapourCycle • This model contains a complete R134a AC-system cycle with controlled superheating. The model contains an init record, used for initialization and boundary condition data. All air flow connectors and the signal connectors to the compressor are used as external

  19. Slide 19: Library Contents: Heat Exchanger

    LIBRARY CONTENTS HeatExchanger Microtube compact heat exchangers with louvered fins • Refrigerant – Air • Evaporator, Condenser/GasCooler, Condenser with integrated receiver • Coolant – Air • Radiator, Heater core (AirCoolantHXHorizontal/Vertical) Plate heat exchangers incl. Chevron type • Refrigera

  20. Slide 20: Library Contents: Heat Exchanger

    LIBRARY CONTENTS Heat exchanger • Evaporator • Condenser • GasCooler • CondReceiver • InternalHX • LayeredEvaporator • PlateEvaporator • HXHorizontal • HXVertical ©2021 Modelon. 20

  21. Slide 21: Heat Exchanger Layering

    LIBRARY CONTENTS Heat exchanger – Layering 1 Non-standard and complex heat exchangers can be composed layer by layer Two examples in library: • A condenser with a separate subcooler of smaller face area • An evaporator composed from layers that 2 are not aligned in air flow direction Heat exchangers

  22. Slide 22: Library Contents: Heating

    LIBRARY CONTENTS Heating HeatExchangers • AirCoolantHXHorizontal/Vertical • PlateAir/RefCoolantHX • CoolantRefrigerantHX/Horizontal/Vertical • ChevronPlateHX PipesAndVolumes Pipe • CoolantSplitHX • CoolantMixHX Reservoirs ©2021 Modelon. 22

  23. Slide 23: Library Contents: Pipes and Volumes

    LIBRARY CONTENTS PipesAndVolumes • Pipe • PipeMB • PipeAdiabatic • Volume • MultiportVolume • Split • Junction • Bend • AirSplitHX • AirMixHX ©2021 Modelon. 23

  24. Slide 24: Library Contents: Receivers

    LIBRARY CONTENTS Receivers • SimpleSeparator • SuctionSideAccumulator • WaterAccumulator • PhaseSeparator ©2021 Modelon. 24

  25. Slide 25: Library Contents: Valves

    LIBRARY CONTENTS Valves • Modelling approach • Quasi-steady state, isenthalpic behaviour • Mass flow is determined by algebraic equations using valve specific data, e.g. the flow coefficient KV and the critical differential pressure ratio x • Thermostatic expansion valves • Modelled in a simplified

  26. Slide 26: Library Contents: Fluids

    LIBRARY CONTENTS - FLUIDS Refrigerants (two-phase) • Reference properties, very high accuracy, high computational cost: R744(CO2), R134a, R1234yf, R1234yf_smooth • Technical, high accuracy, medium computational cost: R717 (ammonia), R744, R728 (nitrogen), R732 (oxygen), R702 (hydrogen), Ethanol, R29

  27. Slide 27: Modelon Compatibility

    MODELON COMPATIBILITY ©2021 Modelon. 27

  28. Slide 28: Recommended Modelon Library Compatibility

    RECOMMENDED MODELON LIBRARY COMPATIBILITY • Air Conditioning Library components are compatible with Liquid Cooling Library and Vapor Cycle Library (or Heat Exchanger Library) via adapters, which are available on demand. ©2021 Modelon. 28

  29. Slide 29: Example: LCL - ACL Interaction

    EXAMPLE : LCL - ACL INTERACTION In this model, an engine cooling circuit ACL Component from Liquid Cooling Library is combined with a radiator from the Air Conditioning Library. The flow is driven by a pump parameterized with a table format pump curve. The engine heat load heat load is described by

  30. Slide 30: Example: VCL - ACL Interaction

    ACL Component EXAMPLE : VCL - ACL INTERACTION This air-conditioning system experiment is a copy of the class VaporCycle.Experiments.AirConditioning, with the modification that a condenser component model from Air Conditioning Library is used. ©2021 Modelon. 30

  31. Slide 31: Latest Release

    LATEST RELEASE ©2021 Modelon. 31

  32. Slide 32: Release 2021.2 New Features

    RELEASE:2021.2 New Features • Major improvements for media using spline-based table lookup (SBTL) • All functions from the media interface are implemented, so that SBTL media can replace Helmholtz-energy based media in any model without changes to that model • Added derivatives, so that tools can ge

  33. Slide 33: Release 2021.2 New Features

    RELEASE:2021.2 New Features • Added options for initial value propagation through connectors allowing to define pressure/enthalpy difference for initialization. Components then automatically propagate and calculate the inlet and outlet values depending on upstream or downstream choice • Four-way val

  34. Slide 34: Release 2021.2 Enhancements

    RELEASE:2021.2 Enhancements • Initialization value for Kv for valves in cycle initialization records with default value calculated from high and low pressure • analyticInverseTfromh parameter in the AirTransport and AirTemperature models to compute temperature for given specific enthalpy and vice ve

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