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RESEARCH PAPER

Entropy Generation Extrema and Their Relationship With Heat Exchanger Effectiveness—Number of Transfer Unit Behavior for Complex Flow Arrangements

[+] Author and Article Information
Ramesh K. Shah

Rochester Institute of Technology, Department of Mechanical Engineering, Rochester, NY 14623-5604, USA

Teodor Skiepko

Bialystok Technical University, Department of Mechanical Engineering, Wiejska 45C, 15-351 Bialystok, Poland

J. Heat Transfer 126(6), 994-1002 (Jan 26, 2005) (9 pages) doi:10.1115/1.1846694 History: Received November 27, 2002; Revised August 28, 2003; Online January 26, 2005
Copyright © 2004 by ASME
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References

Kays, W. M., and London, A. L., 1998, Compact Heat Exchangers, Krieger Publishing, Malabar, FL.
Pignotti,  A., and Shah,  R. K., 1992, “Effectiveness-Number of Transfer Units Relationships for Heat Exchanger Complex Flow Arrangements,” Int. J. Heat Mass Transfer, 35, pp. 1275–1291.
Shah, R. K., and Sekulic, D. P., 1998, “Heat Exchangers,” in Handbook of Heat Transfer, W. M. Rohsenow, J. P. Hartnett, and Y. I. Cho, eds., McGraw-Hill, New York, Chap. 17.
Kandlikar,  S. G., and Shah,  R. K., 1989, “Asymptotic Effectiveness-NTU Formulas for Multipass Plate Heat Exchangers,” ASME J. Heat Transfer, 111, pp. 314–321.
Sekulic,  D. P., 1990, “The Second Law Quality of Energy Transformation in a Heat Exchanger,” ASME J. Heat Transfer, 112, pp. 295–300.
Kern D. Q., 1950, Process Heat Transfer, McGraw-Hill, New York.
Shah R. K., 1983, “Heat Exchanger Basic Design Methods,” in Low Reynolds Number Flow Heat Exchangers, S. Kakaç, R. K. Shah, and A. E. Bergles, eds., Hemisphere Publishing Corp. Washington, DC, pp. 21–72.
Bejan,  A., 1977, “The Concept of Irreversibility in Heat Exchanger Design: Counterflow Heat Exchangers for Gas-to-Gas Applications,” ASME J. Heat Transfer, 99, pp. 374–380.
Bejan A., 1982, “Second-Law Analysis in Heat Transfer and Thermal Design,” Advances in Heat Transfer, T. F. Irvine and J. P. Hartnett, eds., 15, pp. 1–58.
Sekulic,  D. P., 1986, “Entropy Generation in a Heat Exchanger,” Heat Transfer Eng., 7(1-2), pp. 83–88.
Hesselgreaves,  J. E., 2000, “Rationalization of Second Law Analysis of Heat Exchangers,” Int. J. Heat Mass Transfer, 43, pp. 4189–4204.
Kmecko I., 1998, “Paradoxical Irreversibility of Enthalpy Exchange in Some Heat Exchangers,” M.S. thesis, University of Novi Sad, Novi Sad, Yugoslavia.
Witte,  L. C., 1988, “The Influence of Availability Costs on Optimal Heat Exchanger Design,” ASME J. Heat Transfer, 110, pp. 830–835.
Ogiso K., 2002, “Duality of Heat Exchanger Performance in Balanced Counter-Flow Systems,” Proc. of the International Symposium on Compact Heat Exchangers, G. P. Celata et al., eds., Edizioni ETS, Pisa, pp. 203–205.
London,  A. L., 1982, “Economics and the Second Law: An Engineering View and Methodology,” Int. J. Heat Mass Transfer, 25, pp. 743–751.
London, A. L., and Shah, R. K., 1983, “Costs of Irreversibilities in Heat Exchanger Design,” Heat Transfer Engineering, 4(2), pp. 59–73; Discussion by W. Roetzel, in 5(3-4), 1984, pp. 15, 17, and 6(2), 1985, p. 73.

Figures

Grahic Jump Location
Idealized temperature distributions in a 1-2 TEMA E exchangers (different by the shell fluid nozzle orientation) with shell fluid mixed for low NTU (with dashed lines)—case of no TC, and high NTU (with solid lines): (a) case of external TC, and (b) external and internal (▴) TC.
Grahic Jump Location
S*/Smax*,T2,o/T1,o and P1 as function of NTU1 for a 1-2 TEMA G exchanger with overall counterflow for ϑ=2.0, ▴-temperature cross (TC)
Grahic Jump Location
S*/Smax*,S̄,S̄,T2,o/T1,o and P1 as a function of NTU1 for a 1-2 TEMA J exchanger for ϑ=2.0. Note S̄=Sirr/(q/Tc,i) used by Hesselgreaves 11 marked with +, S̄=Sirr/UA used by Ogiso 14 marked with ×
Grahic Jump Location
S*/Smax*,T2,o/T1,o and P1 as a function of NTU1 for a 1-2 TEMA G with overall parallelflow exchanger for ϑ=2.0
Grahic Jump Location
S*/Smax*,T2,o/T1,o and P1 as a function of NTU1 for a 2 Pass—2 Pass plate heat exchanger with overall parallelflow and individual passes in counterflow for ϑ=2.0
Grahic Jump Location
S*/Smax*,T2,o/T1,o and P1 as a function of NTU1 for a 3 Pass—3 Pass plate heat exchanger with overall parallelflow and individual passes in counterflow for ϑ=2.0

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