Modelon Ab · OMXSTO:MODEL
Modelon Ab — Technical Presentation (2021)
30 slides from Modelon Ab's technical presentation, 2021
Slide 1: Vapor Cycle Library Overview
VAPOR CYCLE LIBRARY Overview ©2021 Modelon.
Slide 2: Agenda
AGENDA ❑ About Vapor Cycle Library ❑ Key Features ❑ Key Capabilities ❑ Key Applications ❑ Library Contents ❑ Modelon Compatibility ❑ Latest Release ©2021 Modelon. 2
Slide 3: About Vapor Cycle Library
ABOUT VAPOR CYCLE LIBRARY condenser • Vapor Compression Cycles • Air-conditioning - automotive, residential • Refrigeration - cryogenic, supermarket, household appliances evaporator • Heat Pumps - automotive, residential • Organic Rankine Cycles • Waste heat recovery - automotive, residential, proce
Slide 4: Key Benefits
KEY BENEFITS • Transient and steady-state simulation of component test rigs and cycle systems • Flexible composition of user-defined system architectures • Wide range of different working fluids including R-134a, R-1234yf, R-404a, R-407c, carbon dioxide, isobutane • Plug and play compatible with oth
Slide 5: Key Capabilities
KEY CAPABILITIES • Ready-to-use models for • Example cycle systems • Heat exchangers • Valves and flow resistances • Flow machines • Pipes and tanks • Fluid domains • Working fluid with phase change • Incompressible water in heat exchangers and sources • Moist air in heat exchangers and sources ©202
Slide 6: Key Applications
KEY APPLICATIONS ©2021 Modelon. 6
Slide 7: Key Applications
KEY APPLICATIONS • Air-conditioning system with R134a as default refrigerant. • Air-conditioning system with cabin model. • Organic Rankine Cycle • Heat Pump system 2018-08-08 ©2021 Modelon. 7
Slide 8: Example: Air Conditioning
EXAMPLE: AIR CONDITIONING This is an example of an air- conditioning system experiment with R-134a as refrigerant. A vapor compression cycle with air as secondary fluid in condenser and evaporator is controlled via a variable volume displacement in the compressor to reach a pre-defined air outlet te
Slide 9: Example: Vapor Cycle with Cabin Model
EXAMPLE: VAPOR CYCLE WITH CABIN MODEL This is an example of a simple cabin cooled down by a vapor compression cycle. The compressor displacement is controlled to obtain the set-point value of the outlet air temperature from the evaporator. This an extension of air conditioning model. ©2021 Modelon.
Slide 10: Example: Organic Rankine Cycle
EXAMPLE: ORGANIC RANKINE CYCLE This is an example of an Organic Rankine Cycle with R-245fa as working fluid. Water is the heat source at the evaporator which evaporates the working fluid with an expansion in the following turbine. In the condenser the working fluid is returned into its liquid state
Slide 11: Example: Heat Pump System
EXAMPLE: HEAT PUMP SYSTEM This is an example of a heat pump system experiment with R-407c as working fluid. A vapor compression cycle with water as secondary fluid in condenser and evaporator transports heat from the low temperature heat source to the high temperature heat sink. The superheating at
Slide 12: Library Contents
LIBRARY CONTENTS ©2021 Modelon. 12
Slide 13: Library Contents
LIBRARY CONTENTS • Compressors • Expanders • Pumps • Fan • HeatExchanger • Pipes • Tanks • FlowResistances • Valves • Media ©2021 Modelon. 13
Slide 14: 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
Slide 15: Library Contents: Expanders
LIBRARY CONTENTS Expanders • Modelling approach • Quasi-steady state • Mass flow and change of enthalpy are calculated by algebraic equations • Parameterization • User input as tabulated isentropic efficiency and corrected mass flow. • Description of flow and efficiency characteristic according to t
Slide 16: Library Contents: Pumps and Fan
LIBRARY CONTENTS Pumps • pump combines the corresponding pump component from the Modelon Base Library with a two-phase working fluid volume Fan • An ideal fan with fixed mass flow and no heat losses. • An axial fan where the fan characteristic can be given in different ways ©2021 Modelon. 16
Slide 17: Library Contents: HeatExchanger
LIBRARY CONTENTS HeatExchanger • Working Fluid - Air • Cross-flow • Working Fluid - Liquid • Counter-flow • Working Fluid – Working Fluid • Counter-flow • Generic models based on finite volume method • Usable directly with base geometry (volumes, areas etc.) • Extendable by the user to more complex
Slide 18: Library Contents: Pipes
LIBRARY CONTENTS Pipes • Discretized pipe • Discretized pipe which includes boundary tracking • Discretized adiabatic pipe • Air duct model with dynamic humidity and energy balances. ©2021 Modelon. 18
Slide 19: Library Contents: Tanks
LIBRARY CONTENTS Tanks • Ideally mixed volume of fixed size with scalar port • Ideally mixed volume of fixed size with vector port • Suction accumulator with an U-shaped tube and bleed orifice • liquid receiver assuming complete de-mixing of phases and including pressure drop due to friction • Ideal
Slide 20: Library Contents: Flow Resistances
LIBRARY CONTENTS Flow Resistances • Generic flow resistance • Fixed Orifice • Orifice Tube • Split • Junction • Bend • Air Resistance • Variable Air Resistance ©2021 Modelon. 20
Slide 21: 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
Slide 22: Library Contents: Media
LIBRARY CONTENTS Media High accuracy equations of state in Helmholtz function form • Natural working fluids • R744 (carbon dioxide), R728 (nitrogen), R702 (hydrogen), R732 (oxygen), R717 (ammonia) • Hydrocarbons • R290 (propane), R600a (isobutane) • Alcohols • Ethanol • Hydrofluorocarbons • R125, R1
Slide 23: Library Contents: Basic Components
LIBRARY CONTENTS Basic Components ▪ The AggregateVolume object calculates the total TwoPhase volume in the system – useful for dimensioning ©2021 Modelon. 23
Slide 24: Modelon Compatibility
MODELON COMPATIBILITY ©2021 Modelon. 24
Slide 25: Recommended Modelon Library Compatibility
RECOMMENDED MODELON LIBRARY COMPATIBILITY • VaporCycle Library components are seamless compatible with HeatExchanger Library, Liquid cooling Library, Engine Dynamics Library and Also with Air Conditioning Library via special adapter. ©2021 Modelon. 25
Slide 26: Example: VCL - ACL Interaction
ACL Component EXAMPLE: VCL - ACL INTERACTION This air-conditioning system experiment is a copy of the class VaporCycle.Experiments.AirConditionin g, with the modification that a condenser component model from Air Conditioning Library is used. ©2021 Modelon. 26
Slide 27: Latest Release
LATEST RELEASE ©2021 Modelon. 27
Slide 28: Release 2021.2 New Features
RELEASE:2021.2 New Features • Liquefied air energy storage (LAES) example added, a thermo-electric energy storage system that uses liquid air as the energy storage media. The stored energy is used to cover electricity consumption peaks or for balancing of the power grid ©2021 Modelon. 28
Slide 29: Release 2021.2 New Features
RELEASE:2021.2 New Features • An example of recompression Brayton power cycle system with supercritical CO2 as fluid added. The model is set up to provide 15 MW turbine output. Primary heater or external heat source can be used for providing heat to the fluid after compression based on the turbine i
Slide 30: Release 2021.2 New Features and Enhancements
RELEASE:2021.2 New Features • Improved the SBTL media to support generating analytic Jacobians, but not yet for the system models Enhancements • Improved the R1234yfSBTL coefficients with extended range • Improved the CoolProp volume experiment model • Robustness improvements for the FlowModifier mo