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 |
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| Pages (from-to) | 134 |
| Number of pages | 1 |
| Journal | ASHRAE Transactions |
| Volume | 108 PART 1 |
| State | Published - 2002 |
| Externally published | Yes |
| Event | 2002 ASHRAE Winter Meeting - Atlantic City, NJ, United States Duration: Jan 13 2002 → Jan 16 2002 |
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.