Increasing attention has recently been drawn to the energy consumption of the manufacturing process. Manufacturers are facing challenges from society of reducing emissions and operating more efficiently because of rising raw material prices and energy costs. Manufacturers are trying to balance among the total energy, economic and environmental targets simultaneously, a strategy that can be self-conflicting at times. This paper focuses on the objective optimizations of a plantlevel energy supply system, and describes how a multiobjective optimization strategy can be effectively formulated for making the best use of energy delivered to the manufacturing process. An example from an automotive assembly manufacturer is described.

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