Abstract
This chapter presents a methodology that incorporates economical, environmental, heat integration and operational considerations within a multi-objective optimization framework. The methodology as it stands enables the design engineers to draw “boundary” Pareto curves corresponding to the maximum and minimum levels of heat integration for all operating points achievable by the process. It is also possible to use the proposed approach to draw the Pareto curve for any designed HEN between the calculated limits, and thus to quantify the trade-offs between economic and environmental objectives. Improving energy efficiency generally increases plant complexity and which leads to significant impacts on plant operability and/or controllability. The controllability of the designed HEN is analyzed explicitly through the RGA and condition number techniques. Plant-wide control and dynamic evaluation are integrated within the framework as a means of including control and operational considerations in the early stages of design.
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