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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5151

Title: Optimum heat storage design for heat integrated multipurpose batch plants
Authors: Stamp, J
Majozi, T
Keywords: Heat integrat
Heat storage
Multipurpose
Multiproduct
Energy optimisation
Energy
Chemical engineering
Modelling
Simulation
Issue Date: 2011
Publisher: Elsevier
Citation: Stamp, J and Majozi, T. 2011. Optimum heat storage design for heat integrated multipurpose batch plants. Energy (In Press)
Series/Report no.: Workflow request;7251
Abstract: Heat integration to minimise energy usage in multipurpose batch plants has been in published literature for more than two decades. In most present methods, time is fixed a priori through a known schedule, which leads to suboptimal results. The method presented in this paper treats time as a variable, thereby leading to improved results. Both direct and indirect heat integration are considered together with optimisation of heat storage size and initial temperature of heat storage medium. The resulting model exhibits MINLP structure, which implies that global optimality cannot generally be guaranteed. However, a procedure is presented that seeks to find a globally optimal solution, even for nonlinear problems. Heat losses from the heat storage vessel during idling are also considered. This work is an extension of MILP model of Majozi (2009), which was more suited to multiproduct rather than multipurpose batch facilities. Optimising the size of the heat storage vessel as well as the initial temperature of the heat storage fluid decreased the requirement for external hot utility for an industrial case study by 33% compared to using known parameters.
Description: Copyright: 2011 Elsevier . This is the Post Print version of the work. The definitive version is published in the Journal Energy
URI: http://hdl.handle.net/10204/5151
Appears in Collections:Advanced mathematical modelling and simulation
General science, engineering & technology

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