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A new technique for simultaneous water and energy minimisation in process plant

Manan, Z. A. and Tea, S. Y. and Alwi, S. R. W. (2009) A new technique for simultaneous water and energy minimisation in process plant. Chemical Engineering Research & Design, 87 (11A). pp. 1509-1519. ISSN 1509-1519

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Official URL: http://dx.doi.org/10.1016/j.cherd.2009.04.013

Abstract

This paper presents a new technique for simultaneous minimisation of water and energy in process plants through a combination of numerical and graphical tools. The technique consists of three steps, namely, setting the minimum water and wastewater targets; design of minimum water utilisation network, and finally, heat recovery network design. This technique offers two key advantages over current state-of-the art techniques. Firstly, it is applicable to mass transfer based and non-mass transfer based water-using operations. Secondly, it introduces a new graphical visualisation tool through a plot of temperature versus stream flowrate, termed as heat surplus diagram to guide water and energy reduction simultaneously. The heat surplus diagram provide insights on the energy demand as well as on stream matching scenarios during design of a maximum water and energy recovery network. A case study on a paper mill plant demonstrates that significant reductions in water and energy consumption can be achieved using this approach.

Item Type:Article
Uncontrolled Keywords:water minimisation, energy minimisation, pinch analysis, process integration, heat surplus diagram, heuristics
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:11836
Deposited By: Nor Asmida Abdullah
Deposited On:21 Jan 2011 10:24
Last Modified:21 Jan 2011 10:24

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