4009 — The Effect of R123 Condensate Inundation and Vapour Shear on Enhanced Tube Geometries
- Comments Off on 4009 — The Effect of R123 Condensate Inundation and Vapour Shear on Enhanced Tube Geometries
- ASHRAE
Data showing the combined effects of refrigerant R123 condensate inundation and vapour shear on the shell-side heat transfer coefficient are presented for four enhanced tube geometries. The test bundle consists of five instrumented tubes surrounded by inactive tubes in a five-by-five staggered tube arrangement with a horizontal pitch of 22.2mm (0.875in.) and a vertical pitch of 19.1mm (0.75in.). Simulations of the effect of inundation up to a depth of 25 rows are presented at three different vapour velocities. The data were obtained at a saturation temperature of 35degC (95degF) and at heat fluxes between approximately 17,500 and 31,000 W/m2 (5,550 and 9,830Btu/[h.ft2 ). Four separate tube geometries were tested – a 1,024-fpm (26-fpi) tube; a low-fin, 1,475-fpm (40-fpi) tube; and two enhanced tubes, designated the Tu-Cii and the G-SC.
KEYWORDS: year 1996, refrigerants, R123, condensate, heat transfer coefficient, finned tubes, heat flow, testing, performance, comparing, calculating
Citation: ASHRAE Trans. 1996, Vol.102, Part 2, Paper number 4009 (RP-676), 273-284, 10 figs., 4 tabs., refs.
Product Details
- Published:
- 1996
- File Size:
- 1 file , 1.4 MB
- Product Code(s):
- D-16569
