Vapor Compression

Air Conditioning and Climate Control Design

SINDA/FLUINT and FloCADĀ® are used in automotive climate control, electronics cooling, and building HVAC design to simulate transient operation of vapor compression (VC) cycles and for the prediction of pressures, coefficients of performance, and condenser/evaporator liquid positions in a closed two-phase system with a fixed fluid charge. The programs can also be used to size components, to estimate the impact of tolerances and other variations, and to help estimate uncertainties given limited test data.

This widespread application of FloCAD to VC cycles is largely due to an increased demand for transient modeling of air conditioning systems needed to improve energy efficiency. FloCAD's unique abilities to analyze transient two-phase phenomena have been recognized as being critical to achieving accurate performance predictions. It also has tools to deal with the complexities of capillary tubes (both steady and transient) and suction line heat exchangers (SLHX).

A key advantage of using FloCAD to model VC cycle air conditioners is that it is not written specifically to address such systems: the general-purpose nature of the code can be exploited to integrate the VC cycle model with detailed models of the application (vehicle, building, electronics cabinet, etc.).

Sample Models:

Applications in this field have included:
Results of Transient Air Conditioning Prediction

  • Component modeling (compressor, evaporator, heat exchangers, heat pump, condenser, throttling devices)
  • Tracking of charge for steady state and transient simulation
  • Cabin/room psychrometrics and venting
  • System pressure prediction
  • Parametrical analysis and design optimization for sizing of compressors and heat exchangers
  • Effects of time- and direction-varying body forces
  • Regenerative interconnections such as SLHX

Publications

Recorded Videos

 

 

From beginning to advanced, here's your chance to learn how to use the powerful parametric and customization features in Thermal Desktop and SINDA/FLUINT. Click on each title to learn more, or to register.

Please note that earlier classes are prerequisites for later classes, so if you miss one, be sure to check out our recorded video page before attending the next one.

Symbols and Registers
Thursday Sept 26, 9-10am MT (8-9am PT, 11-noon ET)

Advanced Expressions
Thursday Sept 26, 2-3pm MT (1-2pm PT, 4-5pm ET)

Network Element Logic (NEL)
Tuesday Oct 1, 9-10am MT (8-9am PT, 11-noon ET)

Advanced Logic
Tuesday Oct 1, 2-3pm MT (1-2pm PT, 4-5pm ET)

flow regimes

Introduction to Two-phase Flow

September 24, 2-3pm MDT

This webinar introduces basic concepts in two-phase flow modeling including quality, void fraction, flow regimes, slip flow, pressure drops and accelerations, and heat transfer.

No knowledge of CRTech software is required. However, references to the corresponding FloCAD features will be made to assist users of that product.

Click here to register