HVAC&R

Psychrometrics links (references and online calculators)

Keywords

Keywords

This page collects some useful External links (see section below) for Psychrometrics (humid air physics).

CED Engineering course PDF: 'Air Conditioning Psychrometrics (A.Bhatia)'

TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

Jump to first slide

Example 01: Values from 'tdb' and relative humidity 'r'

Sections

HVAC&R Zone

Keywords

Keywords

This zone presents some reference information on Heating, Ventilation, Air-Conditioning, and Refrigeration (HVAC&R), including some worked examples in Mathematica and SysML models.

GOTCHA: Mathematica: Specific enthalpy conversion J/kg to Btu/lb: Does not consider a possible "total" enthalpy reference offset vs 0 °C or 0 °F respectively

Mathematica: TIP: The ThermodynamicData function of Mathematica uses NIST's RefProp under the hood.

R32 (Methylene Fluoride) refrigerant links

Keywords

Keywords

Many of the properties of R32 are available via calls to the free CoolProp software, which has wrappers in many popular coding languages, as well as for Mathematica.

Refrigeration and Air-Conditioning reference links

Keywords

Keywords

This page collects External links (see section below) to some useful HVAC&R resources, especially for air-conditioning, and heat exchangers (evaporators, condensers).

Simulation of the refrigerant cycle Activities and StateMachine in Cameo Simulation Toolkit

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

Screencast: SysML/MBSE: An air conditioner refrigerant cycle in Cameo Simulation Toolkit

Keywords

Video style

This video only shows the Activities and StateMachines. For the underlying Block model please visit this accompanying slide trail:

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

© Copyright 2021 Darren R C Kelly (Webel IT Australia). All rights reserved.

Refrigerant cycle Activity allocation

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

MagicDraw/Cameo: allocation matrix

SysML Block Definition Diagram (BDD)

Activities driving Refrigerant states transitions

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Activity Diagram

StateMachine for Refrigerant states

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML StateMachine Diagram

IBD: Context for SimpleDomesticInverterAirCon - detailed

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Internal Block Diagram (IBD)

IBD: Context for SimpleDomesticInverterAirCon

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Internal Block Diagram (IBD)

BDD: InverterSubsystem

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Block Definition Diagram (BDD)

Overview of two SysPhS-style physical interaction Port types

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Package Diagram

Overview of ValueTypes and Units

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Package Diagram

Overview of flowing quantities and Port types with flows

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Package Diagram

BDD: SimpleDomesticInverterAirCon

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Block Definition Diagram (BDD)

Package Diagram overview of a simple domestic air conditioner with an inverter

Gallery

Tutorial

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Section

Slide kind

SysML Package Diagram

TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

Jump to first slide

IBD: Context for SimpleDomesticInverterAirCon

Sections

Some signals in the example reflect physical quantities, but this is not physical interaction in the sense of physical substances with flow rates and potentials ...

Source

A.5 Humidifier: A.5.1 Introduction: This subannex gives a model of a room humidifier as an example of signal flows and state machines.

Source

A.5 Humidifier: Value property defaults table

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

MagicDraw/Cameo: table

A.5 Humidifier: Scenario block overview BDDs: 96 to 102

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Package Diagram

BDD & PD: EvaporationCalculation2

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: EvaporationCalculation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: Evaporation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & PD: HeatingCalculation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: TemperatureIncrease

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: Heating

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & PD: VaporGenerationPlantCalculation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: Radiation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: VaporGenerationPlant

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & STM: HeaterControl

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML StateMachine Diagram

BDD & STM: Control

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML StateMachine Diagram

BDD & STM: UsageScenario

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML StateMachine Diagram

BDD & PD: WaterTank

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: Humidifier

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & PD: PercentageConversion

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: VaporPressureCalculation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: HumidityBalance

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: RelativeHumidityCalculation

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: RelativeHumidity

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & PD: SaturationVaporPressure

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & PD: VolumeConversion

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

BDD & IBD: HumidifiedRoom

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

BDD & IBD: HumidifierSystem

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

REFERENCE: A.5 Humidifier: Webel: Block overview

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Package Diagram

REFERENCE: A.5 Humidifier: Webel: ValueTypes and Units

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Package Diagram

Figure 65: Internal structure of the total humidifier system - black box vs details

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

SysML Internal Block Diagram (IBD)

Figure 64: Total humidifier system example (MOCKUP)

Gallery

Tutorial

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Section

Annex A.5: Humidifier (with Units)

Slide kind

The blocks used in these diagrams are introduced in Subannex A.5.4.

Source

The internal structure of VaporGenerationPlant uses blocks Heating and Evaporation, which have internal structures depicted in Figure 70 and Figure 71, respectively.

Source

The internal structure of Humidifier in Figure 68 uses a block VaporGenerationPlant, which has an internal structure shown in Figure 69.

Source

The internal structure of HumidifiedRoom depicted in Figure 66 uses a block RelativeHumidity, which has an internal structure depicted in Figure 67.

Source

The internal structure of the block HumidifierSystem shown in Figure 65 uses the blocks HumidifiedRoom and Humidifier. These two blocks have their own internal structures.

Source

A.5.3 Internal structure: Figure 65 through Figure 71 show the internal structure of the total humidifier system and its components through seven nested internal block diagrams.

Source

The humidifier uses information about the room’s humidity level to determine how much vapor to input to the room. The humidifier includes a water tank, a heater controller, and a vapor generation plant.

Source

A.5.2 System being modeled: The total humidifier system has two main components: the humidified room and the humidifier, see Figure 64.

Source

Annex A.5: Humidifier (with Units)

TRAIL: SysPhS-1.1 Annex A examples in MagicDraw/Cameo SysML vs Modelica (Wolfram SystemsModeler)

Slides in this section

If you want to navigate the entire section including the additional explanatory text click on the title link of the first slide to view the full slide page, then use the next links to move through the slide pages. If you just want to view the slide images only in sequence, click on any slide to view it larger in a viewer, then click again to move through each slide in this tutorial trail section.

Figure 64: Total humidifier system example (MOCKUP)

Figure 65: Internal structure of the total humidifier system - black box vs details

REFERENCE: A.5 Humidifier: Webel: ValueTypes and Units

REFERENCE: A.5 Humidifier: Webel: Block overview

BDD & IBD: HumidifierSystem

BDD & IBD: HumidifiedRoom

BDD & PD: VolumeConversion

BDD & PD: SaturationVaporPressure

BDD & IBD: RelativeHumidity

BDD & PD: RelativeHumidityCalculation

BDD & PD: HumidityBalance

BDD & PD: VaporPressureCalculation

BDD & PD: PercentageConversion

BDD & IBD: Humidifier

BDD & PD: WaterTank

BDD & STM: UsageScenario

BDD & STM: Control

BDD & STM: HeaterControl

BDD & IBD: VaporGenerationPlant

BDD & PD: Radiation

BDD & PD: VaporGenerationPlantCalculation

BDD & IBD: Heating

BDD & PD: TemperatureIncrease

BDD & PD: HeatingCalculation

BDD & IBD: Evaporation

BDD & PD: EvaporationCalculation

BDD & PD: EvaporationCalculation2

Export to Modelica and execution of the SysML/SysPhS block HumidifierSystem_S1

A.5 Humidifier: Scenario block overview BDDs: 96 to 102

A.5 Humidifier: Value property defaults table

Subscribe to HVAC&R

Site looks mangled? Get help here

We are Australia's Systems Modeling Language (SysML^®) and Model-Based Systems Engineering (MBSE) specialists!

Catch our SysMLv1/MBSE course Early Bird Deal 50% off all courses fully pre-paid by 21st July 2025!

Save 50% off Live Online SysMLv1/MBSE web sessions for individuals before 21st July 2025!

Learn about our 50% off deals for all SysMLv1 training services, Webel Q&A access, and SysMLv1 slide sales!

SysMLv1 slide set PDFs now available for purchase!

Home of the Webel Parsing Analysis recipe for Model-Based Systems Engineering with SysML^®

Visit our Client showcase