Abstract
AbstractA method for solving the problem of heat exchanger network synthesis in chemical process plants is presented based on the use of the out‐of‐kilter algorithm. The method represents an extension of previous approaches based on network flow problem formulations. A new approach to overcome the constraints in forbidden‐match problems, termed the dual stream approach, has been developed based on the use of a stream as both a hot and a cold stream. This approach results in considerable savings in utility costs in certain forbidden‐match problems. An algorithm to deal with heating or cooling utilities that undergo temperature changes, termed non‐point‐temperature utilities, is presented using the transshipment model. The new algorithm determines the utility mass flow rates and pinch points accurately.
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