Two-phase flow of R-22 through short-tube orifices

Yong Chan Kim, D. L. O'Neal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

41 Citations (Scopus)

Abstract

Measurements were made on short-tube orifices with 5 < L/D < 20 for Refrigerant-22 in a 3/8-inch (9.53-mm) refrigerant line. Data were collected for upstream pressures ranging from 210 to 291 psia (1,448 to 2,006 kPa) and for qualities as high as 10% and subcoolings as high as 25°F (13.9°C). A mass flow model and flow charts were developed by empirically correcting the modified single-phase orifice equation to satisfy the short-tube orifice flow. The data and conditions extend beyond the range of and are presented in a format similar to a study by Aaron and Domanski (1990). For normal heat pump operating conditions, the mass flow rate was dependent on upstream pressure and upstream subcooling, but it was insensitive to downstream pressure due to approximate choking. As found in previous investigations, the mass flow rate was also dependent on cross-sectional area, chamfer depth, and short-tube length. For two-phase flow entering the short tube, the flow rate decreased with increasing quality.

Original languageEnglish
Title of host publicationASHRAE Transactions
PublisherASHRAE
Pages323-334
Number of pages12
Volume100
Edition1
Publication statusPublished - 1994
Externally publishedYes
EventProceedings of the ASHRAE Winter Meeting - New Orleans, LA, USA
Duration: 1994 Jan 231994 Jan 26

Other

OtherProceedings of the ASHRAE Winter Meeting
CityNew Orleans, LA, USA
Period94/1/2394/1/26

Fingerprint

Orifices
Two phase flow
Flow rate
Refrigerants
Pumps

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Kim, Y. C., & O'Neal, D. L. (1994). Two-phase flow of R-22 through short-tube orifices. In ASHRAE Transactions (1 ed., Vol. 100, pp. 323-334). ASHRAE.

Two-phase flow of R-22 through short-tube orifices. / Kim, Yong Chan; O'Neal, D. L.

ASHRAE Transactions. Vol. 100 1. ed. ASHRAE, 1994. p. 323-334.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kim, YC & O'Neal, DL 1994, Two-phase flow of R-22 through short-tube orifices. in ASHRAE Transactions. 1 edn, vol. 100, ASHRAE, pp. 323-334, Proceedings of the ASHRAE Winter Meeting, New Orleans, LA, USA, 94/1/23.
Kim YC, O'Neal DL. Two-phase flow of R-22 through short-tube orifices. In ASHRAE Transactions. 1 ed. Vol. 100. ASHRAE. 1994. p. 323-334
Kim, Yong Chan ; O'Neal, D. L. / Two-phase flow of R-22 through short-tube orifices. ASHRAE Transactions. Vol. 100 1. ed. ASHRAE, 1994. pp. 323-334
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