Optimal Synthesis of Multipass Heat Exchanger without Resorting to Correction Factor

Authors: Bharat B. Gulyani, Anuj Jain, Shalendra Kumar

Abstract:

Customarily, the LMTD correction factor, FT, is used to screen alternative designs for a heat exchanger. Designs with unacceptably low FT values are discarded. In this paper, authors have proposed a more fundamental criterion, based on feasibility of a multipass exchanger as the only criteria, followed by economic optimization. This criterion, coupled with asymptotic energy targets, provide the complete optimization space in a heat exchanger network (HEN), where cost-optimization of HEN can be performed with only Heat Recovery Approach temperature (HRAT) and number-of-shells as variables.

Keywords: heat exchanger, heat exchanger networks, LMTD correction factor, shell targeting.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077064

References:

[1] Bowman, R.A., Mueller, A.C., and Nagle, W.M. Mean Temperature Difference in Design, Trans. ASME, 62, p. 283- 293, 1940.
[2] Ahmad, S., Linnhoff, B., and Smith, R. Design of Multipass Heat Exchangers: An Alternative Approach, Trans. ASME, 110, pp. 304-309, May 1988.
[3] Gulyani, B. B., and Mohanty, B., 1996, ÔÇÿÔÇÿEstimating Log Mean Temperature Difference in Multipass Exchangers,-- Chem. Eng., 103, No. 11, pp. 127-130.
[4] Gulyani, B. B. (2000). Estimating Number of Shells in Shell and Tube Heat Exchangers: A New Approach Based on Temperature Cross, Transactions of the ASME Jl of Heat Transfer, Vol. 122, August, pp. 566-571.
[5] Gulyani, B. B., S. Khanam, B. Mohanty. A new approach for shell targeting of a heat exchanger network, Computers and Chemical Engineering, Computers and Chemical Engineering, 33 (2009), 1460-1467.
[6] Moita, R. D., Fernandes, C., Matos, H. A., and Nynes, C. P. (2004). A cost base strategy to design multiple shell and tube heat exchangers. ASME Journal of Heat Transaction, 126, 119- 130.
[7] Ponce-Orgeta, J. M., Serna-Gonzalez, M., & Jimenez-Gutirrez, A. (2008). Design and optimization of multipass heat exchangers. Chemical Engineering and Processing, 47(5), 906- 913.
[8] Kern, D.Q. Process Heat Transfer, McGraw Hill, New York, 1965.
[9] Underwood, A.J.V., J. Inst. Pet. Tech., 20, pp. 145-158, 1934.
[10] Gulyani, B.B. and Mohanty, B. A novel FT plot for shell and tube heat exchangers, Research and Industry, 40, pp. 189-192, Sept. 1995.
[11] Saunders, E.A.D. Heat Exchangers __ Selection, Design and Construction, John Wiley & Sons, Inc., New York, 1988.
[12] Walker, G. Industrial Heat Exchangers __ A Basic Guide, Hemisphere Publishing Corporation, Washington, D.C., 1982.
[13] TEMA. Standards of Tubular Exchanger Manufacturers Association, 6th edition, Tubular Exchanger Manufacturers Association, Inc., NewYork. 1978.
[14] Frank, O. In Practical Aspects of Heat Transfer, AIChE, NewYork, 1978.
[15] Wales, R.E. Mean Temperature Difference in Heat Exchangers, Chem. Eng., 88(4), pp. 77-81, Feb. 23, 1981.
[16] Li Shaojun and Yao Pingjing, Synthesis of heat exchanger network considering multipass exchangers, Chinese J. of Chem. Eng., 9(3), 242-246 (2001)
[17] Gulyani, B. B. (1998). Strategies for design and simulation of heat exchanger networks. Ph.D. Dissertation, Department of Chemical Engineering, University of Roorkee, India.
[18] Smith, R. (2005). Chemical process design and integration. John Wiley and Sons, Ltd.