Numbi, B.P. (Bubele Papy)Xia, Xiaohua2015-05-292015-05-292015-07Numbi, BP & Xia, X 2015, 'Systems optimization model for energy management of a parallel HPGR crushing process', Applied Energy, vol. 149, no. 133-147.0306-2619 (print)1872-9118 (online)10.1016/j.apenergy.2015.03.129http://hdl.handle.net/2263/45337This work proposes a systems optimization control model for energy management of a parallel crushing process made up with high-pressure grinding rolls (HPGR) machines. The aim is to reduce both energy consumption and cost through optimal control of the process and load shifting, respectively. A case study of a copper crushing process is solved under three scenarios in order to evaluate the effectiveness of the developed model. Simulation results show that 41.93% energy cost saving is achieved through load shifting by coordinating the rotational speed of HPGRs. It is further shown that the energy saving can be achieved when the two HPGRs are not operated with equal overall efficiency, but also through a small decrement in rolls operating pressure. In the first case, 1.87% energy saving is obtained while in the last case, about 4.5% energy saving is achieved for every decrement of 0:2 N=mm2 in rolls operating pressure without significant change in product quality.en© 2015 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Applied Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Energy, vol.149, pp.133-147, 2015. doi : 10.1016/j.apenergy.2015.03.129.Systems optimization modelEnergy managementParallel HPGR crushing processTime-of-use tariffHigh-pressure grinding rolls (HPGR)Postprint Article