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oai:www.ideals.illinois.edu:2142/83940 2023-07-11 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Hrnjak, Predrag S. Seeton, Christopher John 2015-09-25T21:12:47Z 2015-09-25T21:12:47Z 10000-01-01 2009 2009 This research developed measurement capabilities for measuring the solubility, miscibility, liquid density, liquid viscosity, and interfacial tension of lubricant-refrigerant mixtures. For the first time, interfacial tension measurements for refrigerant-lubricant mixtures over the range of concentrations from neat lubricant to pure refrigerant have been measured and published. The research has also lead to the development of a new prediction and modeling method for liquid viscosity and extends the historic lubricant only mixing rules to systems of lubricants with dissolved liquefied gases. A high-speed, high-pressure (< 100 bar, 1500 psia) video system has been constructed to capture the two-phase flow patterns of CO2 flows near the critical point with and without coexisting lubricant inside 0.5 mm tubes. A new flow map based on the thermophysical properties of the flowing fluid has been developed to account for the viscous and interfacial tensions effects on two-phase flows in channels below the criteria for interfacial tension affected flows. Made available in DSpace on 2015-09-25T21:12:47Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3392468.pdf: 3137045 bytes, checksum: 8f256f260df9d0a0496d217d9e4fe99b (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 85221 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 163 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/83940 (MiAaPQ)AAI3392468 eng Engineering, Mechanical Carbon Dioxide-Lubricant Two-Phase Flow Patterns in Small Horizontal Wetted Wall Channels: The Effects of Refrigerant/lubricant Thermophysical Properties text Mechanical Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.