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

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

doi:10.1115/SED2002-1037

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

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

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees 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 NU_D = 0.675Ra_D^0.25 for 10⁶ ≤ Ra_D ≤ 10⁸.

Original language	English (US)
Title of host publication	International Solar Energy Conference
Editors	J Boise Pearson, B.N. Farhi
Pages	65-74
Number of pages	10
DOIs	https://doi.org/10.1115/SED2002-1037
State	Published - Dec 24 2002
Event	Solar Engineering 2002 - Reno, NV, United States Duration: Jun 15 2002 → Jun 20 2002

Other

Other	Solar Engineering 2002
Country/Territory	United States
City	Reno, NV
Period	6/15/02 → 6/20/02

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title = "Natural convection from a horizontal tube heat exchanger immersed in a tilted enclosure",

abstract = "Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees 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 106 ≤ RaD ≤ 108.",

author = "Wei Liu and Davidson, {Jane H.} and Kulacki, {F. A.} and Mantell, {Susan C.}",

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doi = "10.1115/SED2002-1037",

language = "English (US)",

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T1 - Natural convection from a horizontal tube heat exchanger immersed in a tilted enclosure

AU - Liu, Wei

AU - Davidson, Jane H.

AU - Kulacki, F. A.

AU - Mantell, Susan C.

PY - 2002/12/24

Y1 - 2002/12/24

N2 - Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees 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 106 ≤ RaD ≤ 108.

AB - Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees 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 106 ≤ RaD ≤ 108.

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U2 - 10.1115/SED2002-1037

DO - 10.1115/SED2002-1037

M3 - Conference contribution

AN - SCOPUS:0036456567

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EP - 74

BT - International Solar Energy Conference

A2 - Boise Pearson, J

A2 - Farhi, B.N.

T2 - Solar Engineering 2002

Y2 - 15 June 2002 through 20 June 2002

ER -

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

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