Natural convection from a horizontal tube heat exchanger immersed in a tilted enclosure

Wei Liu, Jane H. Davidson, F. A. Kulacki, Susan C. Mantell

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 deg are measured. The results serve as a baseline case for a solar water heating system with a heat exchanger immersed in an integral collector storage. Experiments are conducted for isothermal and stratified enclosures with both adiabatic and uniform heat flux boundary conditions. Natural convection flow in the enclosure is interpreted from measured water temperature distributions. Formation of an appropriate temperature difference that drives natural convection is determined. Correlations for the overall heat transfer coefficient in terms of the Nusselt and Rayleigh numbers are reduced to the form NuD=0.675RaD0.25 for 9 × 105 ≤ RaD ≤ 4 × 107.

Original languageEnglish (US)
Pages (from-to)67-75
Number of pages9
JournalJournal of Solar Energy Engineering, Transactions of the ASME
Volume125
Issue number1
DOIs
StatePublished - Feb 2003

Fingerprint

Dive into the research topics of 'Natural convection from a horizontal tube heat exchanger immersed in a tilted enclosure'. Together they form a unique fingerprint.

Cite this