Temperature driving force (TDF) curves for heat exchanger network retrofit – A case study and implications

Dina A. Kamel, Mamdouh A. Gadalla, Omar Y. Abdelaziz, Mennat A. Labib and Fatma H. Ashour

Energy, 2017, vol. 123, issue C, 283-295

Abstract: In the present contribution, concepts supporting a new analysis method to retrofit heat exchanger networks (HENs) are presented. The new graphical representation appears to be simple to use and needs no simulation tools or software packages to perform the retrofit calculations and is found valuable for conceptual applications. The temperature driving force new representation (TDF) is accordingly applied to an existing HEN in an Egyptian refinery to boost its energy efficiency and generate cost-effective opportunities. This refinery is the most recent unit installed in Egypt as it has been built in 1994. Since this refinery is very modern, its energy consumption exceeds the benchmark by only 21.5% which is relatively very low compared to its counterparts worldwide. The graphical revamping in application applied on the HEN shows savings of approximately 10.5% in the energy demand with minor structural modifications, achieving some 60% of the potential energy savings with respect to Pinch Analysis benchmarks. The modified preheat train only exceeds the benchmark by 8.8%. Implications and advantages of the new developed approach are also discussed, highlighting the merits of the proposed method.

Keywords: Graphical revamping; Heat exchanger network; Pinch analysis; Energy saving; Retrofit; Process integration; Temperature driving force (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:123:y:2017:i:c:p:283-295

DOI: 10.1016/j.energy.2017.02.013

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