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A new graphical method for Pinch Analysis applications: Heat exchanger network retrofit and energy integration

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  • Gadalla, Mamdouh A.

Abstract

Energy integration is a key solution in chemical process and crude refining industries to minimise external fuel consumption and to face the impact of growing energy crises. Typical energy integration projects can reach a reduction of heating fuels and cold utilities by up to 40% compared with original designs or existing installations. Pinch Analysis is a leading tool and regarded as an efficient method to increase energy efficiency and minimise fuel flow consumptions. It is valid for both natures of design, grassroots and retrofit situations. It can practically be applied to synthesise a HEN (heat exchanger network) or modify an existing preheat train for minimum energy consumption. Heat recovery systems or HENs are networks for exchanging heat between hot and cold process sources. All heat transferred from hot process sources into cold process sinks represent the scope for energy integration. On the other hand, energies required beyond this integrated amount are to be satisfied by external utilities. Graphical representations of Pinch Analysis, such as Composite and Grand Composite Curves are very useful for grassroots designs. Nevertheless, in retrofit situation the analysis is not adequate and besides it is graphically tedious to represent existing exchangers on such graphs.

Suggested Citation

  • Gadalla, Mamdouh A., 2015. "A new graphical method for Pinch Analysis applications: Heat exchanger network retrofit and energy integration," Energy, Elsevier, vol. 81(C), pages 159-174.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:159-174
    DOI: 10.1016/j.energy.2014.12.011
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    References listed on IDEAS

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