EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER IN SHELL-AND-TUBE HEAT EXCHANGERS WITHOUT BAFFLES

Kim WK; Aicher T

Korean Journal of Chemical Engineering, Vol.14, No.2, 93-100, March, 1997

The influences of geometrical parameters on the shell side heat transfer in shell-and-tube heat exchangers are investigated by experiments using 32 different test heat exchangers. The test heat exchangers differ by number of tubes, length, shell and tube diameter, nozzle diameter and tube pitch. From the experimental results it can be confirmed that the influence of the tube pitch is small enough to be neglected in shell-and-tube heat exchangers used in real processes. The heat transfer rate of the longitudinal flow can be calculated from the correlation for turbulent flow in concentric annular ducts by inserting the porosity insted of the ratio of tube to shell diameter. The influence of the cross flow in the nozzle region increases with decreasing length of the heat exchangers. The heat transfer coefficients in the nozzle region are determined by comparing the overall heat transfer coefficients of the heat exchangers with that calculated from the correlation for the longitudinal flow. The results show that the heat transfer coefficient in the nozzle region is 40% greater than that in the parallel region, if the length of the apparatuses is about 30 times tha hydraulic diameter. A new correlation suitable for predicting the heat transfer coefficient is presented, which consists of a superposition of the Nusselt number for the flow in the nozzle region and that for the longitudinal flow.

Keywords:Turbulence Flow;Shell-side;Heat Transfer Coefficients;Empirical Correlation;Shell-and-tube Heat Exchangers

[References]

Aicher T, Kim WK, "Experimental Investigation of Influence of the "Cross-flow" in the Nozzle Region on the Shell-side Heat Transfer in Double Pipe Heat Exchangers," Int. Comm. Heat Mass Transfer, to be published (1997)
Dingee DA, Bell WB, Chastain JW, Fawcett SL, "Heat Transfer from Parallel Rods in Axial Flow," BMI-1026, Battelle Memorial Institute, Columbus, Ohio (1955)
Boelter D, "Heat and Mass Transfer," McGraw-Hill Book Comp. (1956)
Donohue A, Ind. Eng. Chem., 41(11), 2499 (1949)
El-Genk MS, Bedrose SD, Rao DV, Int. J. Heat Mass Transf., 33, 1289 (1990)
Gentry CC, Young RK, Small WM, "Rodbaffle Heat Exchangers," 7th Int. Heat Transfer Conf., Munich, Germany, 6 (1982)
Gnielinski V, "Warmeubergang im konzentrischen Ringspalt," VDI-Warmeatlas, Section Gb, VDI-Verlag, Dusseldorf, 6th edition (1991)
Kim WK, "Warmeubergang and Druckverlust in langsdurch-stromten Rohrbundelwarmeubertragem," Ph.D. Dissertation, University Karlsruhe, Karlsruhe, Germany (1994)
Kim WK, Gnielinski V, Martin H, Chem. Eng. Process., 32(2), 99 (1993)
Markocy G, "Konvektive Warmeubertragung in langsangestromten Rohr-oder Stabbundeln," Ph.D. Dissertation, Munich University, Munich, Germany (1971)
Miller P, Bymes JJ, Benforado DM, AIChE J., 2(2), 226 (1956)
Petukhov BS, Roisen LI, Teplofiz Vysokikh Temp., 12, 565 (1974)
Presser K, "Warmeubergang und Druckverlust an Reaktorbrennelementen in Form langsdurchstromter Rundstabbundel," Jul-48-RB (1967)
Rieger M, Int. J. Heat Mass Transf., 12, 1421 (1969)
Short BE, Uni. Texas Publ., 4324, 1 (1943)
Wantland JL, "Compact Turbular Heat Exchanger," Reactor Heat Transfer Conf., TID-7529, 525 (1956)
Weisman J, Nucl. Sci. Eng., 6, 78 (1958)

[Referenced By]

[1] Aicher T, Kim WK, "Experimental Investigation of Influence of the "Cross-flow" in the Nozzle Region on the Shell-side Heat Transfer in Double Pipe Heat Exchangers," Int. Comm. Heat Mass Transfer, to be published (1997)

[2] Dingee DA, Bell WB, Chastain JW, Fawcett SL, "Heat Transfer from Parallel Rods in Axial Flow," BMI-1026, Battelle Memorial Institute, Columbus, Ohio (1955)

[3] Boelter D, "Heat and Mass Transfer," McGraw-Hill Book Comp. (1956)

[4] Donohue A, Ind. Eng. Chem., 41(11), 2499 (1949)

[5] El-Genk MS, Bedrose SD, Rao DV, Int. J. Heat Mass Transf., 33, 1289 (1990)

[6] Gentry CC, Young RK, Small WM, "Rodbaffle Heat Exchangers," 7th Int. Heat Transfer Conf., Munich, Germany, 6 (1982)

[7] Gnielinski V, "Warmeubergang im konzentrischen Ringspalt," VDI-Warmeatlas, Section Gb, VDI-Verlag, Dusseldorf, 6th edition (1991)

[8] Kim WK, "Warmeubergang and Druckverlust in langsdurch-stromten Rohrbundelwarmeubertragem," Ph.D. Dissertation, University Karlsruhe, Karlsruhe, Germany (1994)

[9] Kim WK, Gnielinski V, Martin H, Chem. Eng. Process., 32(2), 99 (1993)

[10] Markocy G, "Konvektive Warmeubertragung in langsangestromten Rohr-oder Stabbundeln," Ph.D. Dissertation, Munich University, Munich, Germany (1971)

[11] Miller P, Bymes JJ, Benforado DM, AIChE J., 2(2), 226 (1956)

[12] Petukhov BS, Roisen LI, Teplofiz Vysokikh Temp., 12, 565 (1974)

[13] Presser K, "Warmeubergang und Druckverlust an Reaktorbrennelementen in Form langsdurchstromter Rundstabbundel," Jul-48-RB (1967)

[14] Rieger M, Int. J. Heat Mass Transf., 12, 1421 (1969)

[15] Short BE, Uni. Texas Publ., 4324, 1 (1943)

[16] Wantland JL, "Compact Turbular Heat Exchanger," Reactor Heat Transfer Conf., TID-7529, 525 (1956)

[17] Weisman J, Nucl. Sci. Eng., 6, 78 (1958)