0
TECHNICAL PAPERS: Evaporative Boiling and Condensation

Investigation of Circumferential Variation of Heat Transfer Coefficients During In-Tube Evaporation for R-22 and R-407C Using Liquid Crystal

[+] Author and Article Information
Seok Ho Yoon, Min Soo Kim

School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea

J. Heat Transfer 124(5), 845-853 (Sep 11, 2002) (9 pages) doi:10.1115/1.1484110 History: Received March 27, 2000; Revised April 01, 2002; Online September 11, 2002
Copyright © 2002 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Relative magnitude of RGB values as a function of temperature
Grahic Jump Location
(a) An exemplary neuron; and (b) neural network used for calibration
Grahic Jump Location
Comparison of the measured temperatures with the calculated values using a neural network
Grahic Jump Location
Schematic diagram of experimental apparatus for measuring circumferential heat transfer coefficient
Grahic Jump Location
Cross sectional view of the test section
Grahic Jump Location
Circumferential variation of inner wall temperatures at quality near 0.25 for R-22 and R-407C: (a) R-22; G=200 kg/m2 s;q=3.6 kW/m2;Psat=670 kPa;x=0.26; and (b) R-407C; G=200 kg/m2 s;q=3.6 kW/m2;Psat=760 kPa; x=0.24
Grahic Jump Location
Circumferential variation of inner wall temperatures at quality near 0.50 for R-22 and R-407C: (a) R-22; G=200 kg/m2 s;q=3.6 kW/m2;Psat=670 kPa;x=0.46; and (b) R-407C; G=200 kg/m2 s;q=3.6 kW/m2;Psat=760 kPa;x=0.54
Grahic Jump Location
Circumferential variation of heat transfer coefficients at several vapor qualities of R-22 (G=200 kg/m2 s;q=3.6 kW/m2;Psat=670 kPa)
Grahic Jump Location
Circumferential variation of heat transfer coefficients at several vapor qualities of R-407C (G=200 kg/m2 s;q=3.6 kW/m2;Psat=760 kPa)
Grahic Jump Location
Circumferential variation of heat transfer coefficients and comparison with correlations for R-22 and R-407C: (a) R-22; G=200 kg/m2 s;q=3.6 kW/m2;Psat=670 kPa;x=0.46; and (b) R-407C; G=200 kg/m2 s;q=3.6 kW/m2;Psat=760 kPa;x=0.54
Grahic Jump Location
Variation of average heat transfer coefficients with respect to quality and comparison with correlations for R-22 and R-407C: (a) R-22; G=200 kg/m2 s;q=3.6 kW/m2;Psat=670 kPa; and (b) R-407C; G=200 kg/m2 s;q=3.6 kW/m2;Psat=760 kPa

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In