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A mathematical model of a variable displacement wobble plate compressor for automotive air conditioning system.

Author(s) : TIAN C., DOU C., YANG X., et al.

Type of article: Article

Summary

Based on the force balance equations, mass and energy conservation equations, a mathematical model of control valve used in the variable displacement wobble plate compressor (VDC) was developed firstly. The dynamic model of the moving components was then developed by analysing the forces and force moments acting on the piston, piston rod, wobble plate, rotating journal and shaft sleeve. The compression process model was obtained by fitting the data from the experiments. Finally, the steady-state mathematical model of VDC was developed by combining the three above models. In order to verify the mathematical model of the compressor, a test bench for the control valve and the test system for the VDC were established, and the simulated results agree well with the experimental data. The simulation results show that there are four operation modes for the VDC, i.e. constant rotary speed and constant piston stroke length (PSL), variable rotary speed and constant PSL, constant rotary speed and variable PSL, variable rotary speed and variable PSL, which have included almost all operation modes of the refrigeration compressor in common use.

Details

  • Original title: A mathematical model of a variable displacement wobble plate compressor for automotive air conditioning system.
  • Record ID : 2005-0683
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 24 - n. 17-18
  • Publication date: 2004/12

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