A technical note on the uncertainties of the Chen correlation for the boiling heat transfer coefficient at saturated flow
The so-called Chen correlation for the boiling heat transfer coefficient at saturated flow has been, since 1966, the year of its publication, largely cited as one of the most successful of its kind. As well known, it is based on adding terms respective to heat transfer in the liquid part and heat tr...
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Veröffentlicht in: | Nuclear technology & radiation protection 2024-01, Vol.39 (2), p.160-166 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The so-called Chen correlation for the boiling heat transfer coefficient at
saturated flow has been, since 1966, the year of its publication, largely
cited as one of the most successful of its kind. As well known, it is based
on adding terms respective to heat transfer in the liquid part and heat
transfer in the steam part. The respective formulae incorporate both the
Reynolds number factor F and the suppression factor S. At the time, Chen
accepted F and S to be derived graphically. Nevertheless, and mainly for
computational purposes, several equations have been proposed approximating
these two factors. These equations have been reviewed for accuracy and typos
and are now widely accepted. However, there has not been any attempt to
associate the results of the Chen correlation with the expected uncertainty.
The objective of this short report is to process the Chen correlation in
terms of its uncertainty based on the uncertainty of factors F and S. The
uncertainties of F and S were derived digitally from the graphs of F and S
in the original work of Chen of 1966. Following digitization the uncertainty
data were processed to provide uncertainty formulae in polynomial form. It
was accepted that the uncertainty level of F and S was k =1. |
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ISSN: | 1451-3994 1452-8185 |
DOI: | 10.2298/NTRP2402160P |