Sensitivity Analysis for Shell-and-Tube Heat Exchangers Based on Entropy Production

Abstract:

In this article, sensitivity analysis was performed using bidirectional single method with shell-and-tube heat exchanger as the basis and the entropy production in the working process of heat exchanger as target, to explore the optimizing direction for heat exchangers with the objective to reduce entropy production. First, the differential element analysis method was used in a case study of the entropy production of the heat transfer process - including the three heat transfer processes of convective heat exchange inside and outside the pipes and heat conduction across the pipe wall and the flow process - the fluid flowing process inside and outside the pipes, and the typical process parameter - dimensionless inlet heat exchange temperature difference, operation parameter - fluid flow rate inside the pipe and structural parameters - the heat transfer pipe inner diameter and length were used as characteristic parameters, to obtain the sensitivity coefficients under the conditions of the example, being respectively 0.95, 0.3, 0.3 and 0.38. The study in this article can provide some support to the energy efficiency evaluation of heat exchangers.

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 419-424
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.419
• Online since: May 2012
• Authors: Guo Rong Zhu, Xiao Hua Wang, Hong Biao Huang, Hu Chen
• Keywords: Energy Efficiency, Entropy Production, Heat Exchanger, Sensitivity

References

[1] Meizhong Shi, Zhongzheng Wang, in: Principles of Heat Exchanger & Design, Southeast University Press(2009)( In Chinese)

[2] Shiming Yang, Wenquan Tao, in: Heat Transfer Theory, Higher Education Press(2006) (In Chinese)

[3] Webb R L: Heat and Mass Transfer, vol24(4)(1981),p.715

[4] BS EN 305:1997 Heat exchangers. Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers

DOI: 10.3403/01075868u

[5] BS EN 306:1997 Heat exchangers. Methods of measuring the parameters necessary for establishing the performance

[6] DB32/T 1328-2009: General Rule of Energy Efficiency Evaluation for Industrial Heat Exchanger

[7] Jing Zhu, Hanzhong Tao: Chemical Industry and Engineering Progress, 12(2010), S2

[8] Bejan A, in: Advanced Engineering Thermodynamics, Wiley( 1997)

[9] Daxi Xiong, Zhixin Li, Zengyuan Guo: Journal of Engineering Thermophysics. Vol.18(1)(1997), p.90 (In Chinese)

[10] RAMESH K S: ASME Journal of Heat Transfer, Vol126(12)(2003), p.994