Energy use optimization of systems is traditionally done by looking for the best thermodynamic operating conditions of the process and heat integration solutions such as networks to redistribute intelligently the heat between different sources and sinks. Hence, there are two emerging situations in industrial parks that call for new methodologies: first, the flow exchanges are not limited to the plant boundaries, and incoming and outgoing flows could generate economic and environmental gains. Second, material such as waste can no longer be neglected in this optimization. Not only the energy conversion potential of material could be investigated, but other conversion options would bring the possibility of turning the non-usable waste into another usable material through chemical processes. This paper present a conceptual framework of optimization for an energy and mass system, and proposes a methodology for integrating conversion processes, with a case demonstration on wooden waste in an industrial activity zone.

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