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Transient migration of oil at compressor discharge and suction during startup.

Number: 2266

Author(s) : WANG X., HAIDER S., HRNJAK P., ELBEL S.

Summary

This paper focuses on the characterization of the transient behavior of oil at the discharge and the suction of the compressor. The characterization can help to reduce migration and further improve oil separation within the compressor. This study uses high-speed camera to record oil-refrigerant mixture flow at transient startup in variable speed electrical scroll compressor system. Warm and cold startup conditions are recorded and compared. Oil flow during startup is different from the annular mist flow in steady-state conditions. Oil flow is composed of oil droplets traveling with refrigerant vapor flow and oil film attached to the inner wall of discharge tube. During startup, small oil droplets are carried by vapor refrigerant to the discharge where some of droplets are attached to the tube wall and form film flow in low velocity, others coalesce into larger droplets.

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Pages: 9 p.

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Details

  • Original title: Transient migration of oil at compressor discharge and suction during startup.
  • Record ID : 30030635
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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