Foaming characteristics of refigerant/lubricant mixtures

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Description

The air-conditioning and refrigeration industry has moved to HFC refrigerants which have zero ozone depletion and low global warming potential due to regulations on CFC and HCFC refrigerants and concerns for the environment. The change in refrigerants has prompted the switch from mineral oil and alkylbenzene lubricants to polyolester-based lubricants. This change has also brought about a desire for lubricant, refrigerant and compressor manufacturers to understand the foaming properties of alternative refrigerant/ lubricant mixtures, as well as the mechanisms which affect these properties. The objectives of this investigation are to experimentally determine the foaming absorption and desorption rates of HFC ... continued below

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Medium: P; Size: 40 p.

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Goswami, D.Y.; Shah, D.O.; Jotshi, C.K.; Bhagwat, S.; Leung, M. & Gregory, A. April 1, 1997.

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Description

The air-conditioning and refrigeration industry has moved to HFC refrigerants which have zero ozone depletion and low global warming potential due to regulations on CFC and HCFC refrigerants and concerns for the environment. The change in refrigerants has prompted the switch from mineral oil and alkylbenzene lubricants to polyolester-based lubricants. This change has also brought about a desire for lubricant, refrigerant and compressor manufacturers to understand the foaming properties of alternative refrigerant/ lubricant mixtures, as well as the mechanisms which affect these properties. The objectives of this investigation are to experimentally determine the foaming absorption and desorption rates of HFC and blended refrigerants in polyolester lubricant and to define the characteristics of the foam formed when the refrigerant leaves the refrigerant/ lubricant mixture after being exposed to a pressure drop. The refrigerants being examined include baseline refrigerants: CFC-12 (R-12) and HCFC-22 (R-22); alternative refrigerants: HFC-32 (R-32), R-125, R-134a, and R-143a; and blended refrigerants: R-404A, R-407C, and R-410A. The baseline refrigerants are tested with ISO 32 (Witco 3GS) and ISO 68 (4GS) mineral oils while the alternative and blended refrigerants are tested with two ISO 68 polyolesters (Witco SL68 and ICI RL68H).

Physical Description

Medium: P; Size: 40 p.

Notes

OSTI as DE97004547

Source

  • Winter meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. and exposition, Philadelphia, PA (United States), 25-29 Jan 1997; Other Information: DN: Includes vugraphs

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  • Other: DE97004547
  • Report No.: DOE/CE/23810--82B
  • Report No.: CONF-970101--4
  • Grant Number: FG02-91CE23810
  • Office of Scientific & Technical Information Report Number: 544234
  • Archival Resource Key: ark:/67531/metadc693129

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  • April 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 13, 2015, 7:06 p.m.

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Goswami, D.Y.; Shah, D.O.; Jotshi, C.K.; Bhagwat, S.; Leung, M. & Gregory, A. Foaming characteristics of refigerant/lubricant mixtures, article, April 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc693129/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.