Measurement of the Relationship Between Oil Circulation and Compressor Lubrication in a Mobile AlC System: Part One

Drozdek, J.C.; Chappell, J.D.; Cusano, C.; Hrnjak, P.S.; Miller, N.R.; Newell, T.A.

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Description

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.

Issue Date

2000-07

Keyword(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 compressor. 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 [2000], 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 Name or Number

Air Conditioning and Refrigeration Center TR-169

Type of Resource

text

Language

en

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http://hdl.handle.net/2142/11950

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Project 92

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