Mixed convection heat transfer and pressure drop correlations for tube-ln-siiel! tjiermosyphon heat exchangers witii uniform heat flux

S. D. Dahl, J. H. Davidson

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

An important issue arising from prior studies of thermosyphon heat exchangers for use in solar water heaters is the need for heat transfer and pressure drop correlations for the laminar, mixed-convection regime in which these many of these heat exchangers operate. In this paper, we present empirical correlations for tube-in-shell heat exchangers with the thermosyphon flow on the shell side. The correlations are determined for uniform heat flux on the tube walls. Ranges of Reynolds and Grashof numbers are 130 to 2,000 and 4 X 10^ to 8 X 10”, respectively. Nusselt number correlations are presented in a form that combines the contributions of forced and natural convection. Mixed convection dominates forced convection heat transfer in these geometries. Pressure drop is not significantly affected by mixed convection.

Original languageEnglish (US)
Pages (from-to)260-269
Number of pages10
JournalJournal of Solar Energy Engineering, Transactions of the ASME
Volume120
Issue number4
DOIs
StatePublished - Nov 1998

Fingerprint

Dive into the research topics of 'Mixed convection heat transfer and pressure drop correlations for tube-ln-siiel! tjiermosyphon heat exchangers witii uniform heat flux'. Together they form a unique fingerprint.

Cite this