|Title:||Measurement of the Relationship Between Oil Circulation and Compressor Lubrication in a Mobile AlC System: Part One
|Author(s):||Drozdek, J.C.; Chappell, J.D.; Cusano, C.; Hrnjak, P.S.; Miller, N.R.; Newell, T.A.
|Subject(s):||mobile air conditioning systems
|Abstract:||A study was performed on a swashplate compressor to determine the state of
lubrication. Measurements of electrical resistance were taken as a primary measure of oil
film lubrication at the sliding shoe/swashplate interface. Two additional sensors were
used to indirectly determine the state of compressor lubrication. These included an
acoustic emission sensor mounted on the outside of the compressor and a dynamic
pressure transducer mounted in the swashplate cavity of the compressor.
The compressor lubrication experiments were performed on a mobile air
conditioning test stand. The loop was modified to control and measure steady oil return
to the compressor. Steady oil circulation conditions were controlled to determine effects
of oil circulation rate, compressor speed, and condenser air inlet temperature on
compressor lubrication. Furthermore, liquid refrigerant slugging and dry oil start up tests
and an oil shut off test were conducted to study severe oil lubrication conditions on the
This thesis outlines the instrumentation used on the compressor to determine the
state of lubrication. Also included are the steady oil circulation test results. A second
thesis, written by Chappell , describes the techniques used to control and measure
oil circulation. In addition, the transient oil circulation test conditions are presented,
including the start up conditions and the oil shut off test.
|Publisher:||Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
|Series/Report:||Air Conditioning and Refrigeration Center TR-169
|Sponsor:||Air Conditioning and Refrigeration Project 92
|Date Available in IDEALS:||2009-05-29
|Identifier in Online Catalog:||4291833