Comparison of the Accuracy and Speed of Transient Mobile A/C System Simulation Models

• DOI: 10.4271/2014-01-0669
• Publication Date: 2014-04-02T06:13:17Z
• Authors: Tibor Kiss; Jason Lustbader
• Keywords: Transient (computer programming); Duty cycle; Component (thermodynamics)

The operation of air conditioning (A/C) systems is a significant contributor to the total amount fuel used by light-and heavyduty vehicles.Therefore, continued improvement efficiency these mobile A/C important.Numerical simulation has been reduce system development time and improve electronic controls, but numerical models that include highly detailed physics run slower than desired for carrying out vehicle-focused drive cycle-based optimization.Therefore, faster are needed even if some accuracy sacrificed.In this study, validated model with physics, "Fully-Detailed" model, two different levels simplification, "Quasi-Transient" "Mapped-Component" models, compared.The Quasi-Transient applies simplifications compared Fully-Detailed allow execution speeds.The Mapped-Component similar except instead flow heat transfer calculations in exchangers, it uses lookup tables created model.All three set up represent same physical controls.Speed results versions steady state transient operation.Steady simulated data also measured data.The show ran much on order 10-and 100-fold, respectively.They adequately approach steady-state operation, predictions