Retrofit of total site heat exchanger networks by mathematical programming approach

Abstract

Heat Integration and Total Site Integration can provide considerable energy savings and emission reduction within industrial plants and entire Total Sites. Several approaches have been developed, such as an approach based on physical insights-Pinch Analysis, an approach based on Mathematical Programming, and recently combined or hybrid approaches based on both Mathematical Programming and Pinch Analysis. There are two designs, grassroots design for new process plants and Total Sites and retrofit design for existing plants and Total Sites. Tools for grassroots designs usually differ from those for retrofits, and retrofit analysis is considerably more difficult as the existing layout should be taken into consideration. This chapter provides an overview of the recent developments in Total Site Integration focusing mainly on the retrofits of existing Total Sites by Mathematical Programming approach and hybrid approaches. First, the Total Site Integration, approaches for Total Site Integration and software tools for Total Site Integration are introduced, followed by the retrofitting of existing heat exchangers within Total Sites. Furthermore, two illustrative examples are shown. Finally, the concluding remarks and sources of further information are provided.