A test system is built first in order to investigate the instability of the automotive air conditioning (AAC) system with a variable displacement compressor (VDC), and hunting phenomena caused by the large external disturbance in the AAC system with a VDC and a thermal expansion valve, and in the AAC system with a VDC and a fixed-area throttling device are investigated experimentally in part 1 of this paper. The experimental results indicate that there also exist the hunting phenomena in the AAC system with a fixed-area throttling device. The system stability is found to be dependent on the direction of the external disturbance, and the system is apt to cause hunting when the condensing pressure decreases excessively since it may cause two-phase state at the throttling device inlet and make a large disturbance to the system. The piston stroke length will oscillate only when the oscillation amplitudes of forces acting on the wobble plate are great enough, otherwise the piston stroke length will be kept invariable, and then the system instability rule is also suitable for the AAC system with a fixed displacement compressor. From the experimental results, it is concluded that the two-phase flow at the throttling device inlet or at the evaporator outlet is the necessary condition but not sufficient condition for system hunting. Finally, a new concept, conservative stable region, is proposed based on the experimental results and theoretical analysis.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Instability of automotive air conditioning system with a variable displacement compressor. Part 1. Experimental investigation


    Contributors:

    Published in:

    Publication date :

    2005


    Size :

    9 Seiten, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    V-5 Automotive Variable Displacement Air Conditioning Compressor

    Skinner,T.J. / Swadner,R.L. / General Motors,Harrison Radiator Diversion,US | Automotive engineering | 1985


    V-5 Automotive Variable Displacement Air Conditioning Compressor

    Swadner, Robert L. / Skinner, Timothy J. | SAE Technical Papers | 1985


    Optimized Supervision of Variable Displacement Compressor for Automotive Air Conditioning

    Yadav, Aditya Pratap / Shukla, Ankit / Goel, Arun Kumar et al. | SAE Technical Papers | 2022