Exergy Analysis and Exergoeconomic Analysis of An Ethylene Process

Hsuan Chang

doi:10.6180/jase.2001.4.2.03

Exergy Analysis and Exergoeconomic Analysis of An Ethylene Process

Chemical Engineering

Hsuan Chang This email address is being protected from spambots. You need JavaScript enabled to view it.¹

¹Department of Chemical Engineering,Tamkang University Tamsui, Taipei, Taiwan, 251, R.O.C.

Received: January 1, 2001
Accepted: June 1, 2001
Publication Date: June 1, 2001

Download Citation: ||https://doi.org/10.6180/jase.2001.4.2.03

ABSTRACT

This paper presents the results of exergy analysis and exergoeconomic analysis for an ethylene process and its auxiliary refrigeration system. The exergy analysis results indicate that the exergetic efficiencies of the demethanization and the debutanization sections are the lowest. On the other hand, the exergoeconomic analysis results indicate that the increase of the unit thermoeconomic cost of the compression section and the demethanization section are the highest. This study demonstrates that exergoeconomic analysis can provide extra information than exergy analysis and the results from exergoeconomic analysis provide cost-based information suggesting potential locations for process improvement.

Keywords: exergoeconomic analysis, thermoeconomic analysis, ethylene process, energy efficiency

REFERENCES

[1] Fuge C. and Sohns, D., “Cut Costs in Olefin Plant,” Hydrocarbon Processing, Nov., p. 165 (1976).
[2] Keiser, V., Heck, G. and Mestrallet, J., “Optimize Demethanizer Pressure for Maximum Ethylene Recovery,” Hydrocarbon Processing, June, p. 115 (1979).
[3] El-Sayed, Y.M and Gaggioli, R.A. “A Critical Review of Second Law Costing Methods-I: Background and Algebraic Procedures,” J. Energy Res. Tech., Vol. 111, p. 1 (1989).
[4] Tsatsaronis, G., “A Review of Exergoeconomic Methodologies,” Proceedings, 4th International Symposium on Second Law Analysis, University of Roma, Rome, Italy, p. 81 (1987).
[5] Valero, A., M.A. Lozano and M. Muñoz, “A General Theory of Exergy Saving, Part I~III,” Computer-Aided Engineering of Energy System – Second Law Analysis and Modelling, AES Vol.2-3, p. 1 (1986).
[6] Tsatsaronis, G. and M.Winhold, “Exergoeconomic Analysis and Evaluation of Energy-Conversion Plants – II. Analysis of A Coal-Fired Steam Power Plant,” Energy, Vol. 10, No. 1, p. 81 (1985).
[7] Valero, A., Guallar, J., and M. Muñoz, “The Exergetic Cost and Related Concepts, An Application to a Simple Cogeneration Plant,” IV International Symposium on Second Law Analysis of Thermal Systems, Roma, May, 25-30, p. 123 (1987).
[8] Tsatsaronis, G., “Invited Papers on Exergoeconomics,” Energy, Vol. 19, No. 3, p. 279 (1994).
[9] Alvarado, A. and C, Gherardelli, “Exergoeconomic Optimization of A Cogeneration Plant,” Energy, Vol. 19, No. 12, p. 1225 (1994).
[10]Kim, S., S. Oh, Y. Kwon, and H. Kwak, “Exergoeconomic Analysis of Thermal Systems,” Energy, Vol. 23, No. 5, p.393 (1998).
[11]Tsatsaronis, G. and M. Winhold, “Exergoeconomic Analysis of Energy-Intensive Chemical Processes,” Proceedings of World Congress III of Chemical Engineering, Tokyo, Japan, Sep. 21-25, Vol. I, p. 402 (1986).
[12]Guallar, J. and A. Valero, “Thermoeconomic Study of A Sugar Factory,” Thermodynamic Analysis of Chemical Reactive Systems, AES-Vol. 4, p. 87 (1988).
[13]Lincoff, A.M., “Separation System for Recovery of Ethylene and Light Products from Naphtha-Pyrolysis Gas Stream,” Process Design Case Study, CACHE Corp., Austin, TX (1983).
[14]Chemstations Inc., CHEMCADTM , V.4.0 (1998).
[15]Gaggioli, R.A., “The Concept of Available Energy,” Chem. Eng. Sci., Vol. 16, p. 87 (1961).
[16]Lozano M.A. and A. Valero, “Methodology for Calculating Exergy in Chemical Process,” Proceedings, ASME Winter Annual Meeting, AES-Vol.4, p.77 (1988).