NATURAL CONVECTION FROM SINGLE FINNED TUBE IMMERRSED IN A TILTED ENCLOSURE
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Abstract
Heat transfer rates of a single horizontal finned tube immersed in 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 integral collector storage. Tests were made with both adiabatic and uniform heat flux boundary conditions. Natural convection flow in 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=0.716 Ra 0.247 Based on the diameter of the immersed tube .Comparison the present work
results with others gave a good agreement
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Canaan, R.E., and Klein, D.E., "An experimental investigation of natural convection heat
transfer within horizontal spent-fuel assemblies," Nuclear Technology, 116, No.3, pp. (306-
, 1996.
Churchill, S.W., and Chu, H.H.S., “Correlating equations for laminar and turbulent free
convection from a horizontal Cylinder.” University of Penney vania, Journal of Mass and Heat
Transfer. , vol., 18, pp (1049-1055).1975.
Farrington, R.B. and Bingham C.E., "Test and analysis of immersed heat exchangers,"
.Solar Energy Research Institute, SERI Report#TR-253-2866, 1986.
Farrington, R.B.," Test Results of immersed coil heat exchangers and liquid storage tanks used in
the packaged systems program," Solar Energy Research Institute, SERI Report#TR-254-2841, 1986.
Hart, J.E., "Stability of the flow in the differentially Heat inclined Box", Journal of Fluid
Mechanics, 47, No.3, pp. (547-576) 1971.
Keyhani, M.and Dalton, T., "Natural convection heat transfer in horizontal Rod-bundles
Enclosures," Journal of Heat Transfer, 118, No.3, pp. (598-605) 1996.
Keyhani, M.and Luo, L., "Numerical study of Natural convection heat transfer in horizontal
Rod-bundles, "Nuclear Science and Engineering, 119, No.2, pp. (116-127) 1995.
Khalillolahi,A.,and Sammakia,B., "Unsteady natural convection generated by a heated surface
within an enclosure ," ,Numerical Heat Transfer,9,No.6, pp.(715-730), 1986.
Lienhand, J.H., "On the commonality of equations for natural convection from immersed
Bodies "International Journal of Heat and Mass Transfer, 16, No.11, pp (2121-2123), 1973.
Liu, W.Davidson,J.Hand Kulacki ,F.A.,” Natural Convection From a Single Tube Immersed in
a Tilted thin Enclosure ”Proceed dings of International Conference on Energy Conversion and
Application(ICECA'2001),Huazhong University of Science and Technology Press,1.PP(408-413),
Wuhan,China,2001.
Morgan, V. T. ,”The overall convective Heat Transfer from smooth Circular Cylinders
”Advances in Heat Transfer , Hartntt ,J.,and Trvine, T. Tr. ,Eds., vol.,11, Wiley. Interscience, Now
York, pp (199-264).1975.
Ozoe ,H.,Sayama ,H.,and Churchill,S.W., " Natural convection in an inclined Rectangular
channelat averious Aspect Ratios and Angles-Experimental Measurements," International Journal
of Heat and Mass Transfer,18,No.12, pp.(1425-1431) ,1975.
Sparrow, E.M., and Charm chi, M., “Natural convection Experiments in an Enclosure
between Eccentric or concentric vertical Cylinders of Different Height and Diameter “University
of Minnesota state, Journal of Mass and heat transfer, vol.20, NO.1. pp (133-143). 1983.
Sundstrom, L.-G., and Kimura, S., "On laminar free convection in inclined rectangular
enclosures,"", Journal of Fluid Mechanics, 313, pp. (343-366), 1996.
Warrington, R. O., and Crupper, G.,”Natural convection Heat Transfer between Cylindrical
tube Bundles and a Cubical Enclosure “, University of Minnesota state, Journal of heat transfer,
vol.103, February, pp (103-107), 1981.
Wu,L.,and Bannerot,R.B. "Experimental study of the effect of water extraction on thermal
stratification in storage ,"Solar Engineering,1,pp(445-451) ,1987.