Efficient Transshipment-Based Framework for Energy Targeting and Retrofitting Industrial Total Sites

Abstract

This work presents an efficient framework TransGen for the energy targeting and retrofitting of industrial Total Sites. An expanded transshipment model with constrained matches – forced and/or prohibited matches – has been further extended. An optimal production of intermediate utilities at different pressure levels is enabled including or excluding preheating depending on the percentage of condensate return. It also enables optimum identifications of modification in heat exchangers networks, which is practical for retrofitting. It includes the rules for obtaining optimistic and pessimistic scenarios by exploring the “Plus- Minus Principle”. Finally, the insights from the Pinch Technology have been added within the framework. This framework could be applied for fixed and varying operational conditions. It is illustrated within the case-study of two process plants operating under fixed conditions. From the case-study it can be seen that significant improvements in energy efficiency and economic objective can be obtained when applying modifications.