Simultaneous heat exchanger network synthesis for direct and indirect heat transfer inside and between processes |
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Authors: | Timo Laukkanen Tor-Martin TveitCarl-Johan Fogelholm |
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Affiliation: | Aalto University, School of Engineering, Department of Energy Technology, P.O. Box 14400, FI-00076 Aalto, Finland |
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Abstract: | Process plants are typically divided into different process parts having specific processing tasks with possibly different ownership. Heat integration between these processes can increase the energy- and economic efficiency for both the overall plant and the individual processes. In this paper we present a heat exchanger network synthesis MINLP-model that allows simultaneous heat integration directly between streams in the same process and both directly and indirectly between streams in different processes. The indirect heat transfer is accomplished by using intermediate streams. Two examples, one small explanatory one and one from the literature, are optimized. The results verify that the model works logically. |
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Keywords: | Heat exchanger network synthesis Synheat model Areas of integrity MINLP Grouping of process streams Indirect heat transfer |
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