Experimental investigation on ammonia spray evaporator with triangular-pitch plain-tube bundle, Part I: Tube bundle effect

X. Zeng, M. C. Chyu, Z. H. Ayub

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

The experiment of spray evaporation of ammonia was conducted using spray nozzles distributing liquid ammonia downward onto a horizontal, 3-2-3 triangular-pitch plain-tube bundle. Heat transfer performance of individual tubes in the tube bundle was studied by changing saturation temperature, heat flux, spray flow rate, nozzle height, and nozzle type. The present data suggest that the tube bundle effect is less significant at a lower saturation temperature, a lower spray flow rate, a smaller nozzle height, and with standard-angle compared with wide-angle nozzles. Mechanism causing variation of individual tubes' heat transfer performance was studied. Results were compared with ammonia spray evaporation in a square-pitch plain-tube bundle.

Original languageEnglish
Pages (from-to)2299-2310
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume44
Issue number12
DOIs
StatePublished - May 8 2001

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