Experimental study of adiabatic capillary tubes: Critical flow of refrigerant/oil mixtures

S. F.Yana Motta; S. L. Braga; J. A.R. Parise

doi:10.1080/10789669.2001.10391279

Experimental study of adiabatic capillary tubes: Critical flow of refrigerant/oil mixtures

S. F.Yana Motta, S. L. Braga, J. A.R. Parise

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6 Scopus citations

Abstract

The critical flow of R-407C/oil mixtures through adiabatic capillary tubes is evaluated in this article. The available literature does not lead to definitive conclusions about the impact of oil on critical flow through capillary tubes. This phenomenon was studied experimentally using oil concentrations ranging from 2.9% to 7.9% (by mass), degrees of subcooling ranging from 8.1°C to 28.5°C (14.6°F to 51.3°F), and a condensing pressure of 1763 kPa (241 psia). The results obtained clearly show the trends of critical mass flow rate for several oil concentrations in the flowing fluid. The experimental data are analyzed and contribute to the knowledge of the influence of oil on the performance of adiabatic capillary tubes.

Original language	English
Pages (from-to)	331-344
Number of pages	14
Journal	HVAC and R Research
Volume	7
Issue number	4
DOIs	https://doi.org/10.1080/10789669.2001.10391279
State	Published - Oct 2001
Externally published	Yes

Funding

The present research work is based on the doctoral dissertation of Dr. Samuel F. Yana Motta. The authors are grateful to CAPES and the Brazilian National Agencies of Research (CNPq) for funding this project.

Funders	Funder number
National Research Centre

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10.1080/10789669.2001.10391279

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abstract = "The critical flow of R-407C/oil mixtures through adiabatic capillary tubes is evaluated in this article. The available literature does not lead to definitive conclusions about the impact of oil on critical flow through capillary tubes. This phenomenon was studied experimentally using oil concentrations ranging from 2.9% to 7.9% (by mass), degrees of subcooling ranging from 8.1°C to 28.5°C (14.6°F to 51.3°F), and a condensing pressure of 1763 kPa (241 psia). The results obtained clearly show the trends of critical mass flow rate for several oil concentrations in the flowing fluid. The experimental data are analyzed and contribute to the knowledge of the influence of oil on the performance of adiabatic capillary tubes.",

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AU - Braga, S. L.

AU - Parise, J. A.R.

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N2 - The critical flow of R-407C/oil mixtures through adiabatic capillary tubes is evaluated in this article. The available literature does not lead to definitive conclusions about the impact of oil on critical flow through capillary tubes. This phenomenon was studied experimentally using oil concentrations ranging from 2.9% to 7.9% (by mass), degrees of subcooling ranging from 8.1°C to 28.5°C (14.6°F to 51.3°F), and a condensing pressure of 1763 kPa (241 psia). The results obtained clearly show the trends of critical mass flow rate for several oil concentrations in the flowing fluid. The experimental data are analyzed and contribute to the knowledge of the influence of oil on the performance of adiabatic capillary tubes.

AB - The critical flow of R-407C/oil mixtures through adiabatic capillary tubes is evaluated in this article. The available literature does not lead to definitive conclusions about the impact of oil on critical flow through capillary tubes. This phenomenon was studied experimentally using oil concentrations ranging from 2.9% to 7.9% (by mass), degrees of subcooling ranging from 8.1°C to 28.5°C (14.6°F to 51.3°F), and a condensing pressure of 1763 kPa (241 psia). The results obtained clearly show the trends of critical mass flow rate for several oil concentrations in the flowing fluid. The experimental data are analyzed and contribute to the knowledge of the influence of oil on the performance of adiabatic capillary tubes.

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Experimental study of adiabatic capillary tubes: Critical flow of refrigerant/oil mixtures

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