 Work-heat exchanger network synthesis (WHENS)Kefeng Huang and I.A. Karimi Energy, 2016, vol. 113, issue C, 1006-1017 Abstract: Research on heat integration has made significant advances in reducing utility consumption in chemical plants. However, the idea of work exchange between high and low-pressure process streams to reduce the consumption of the relatively expensive electricity has received limited attention. In this article, we present a more efficient mixed-integer nonlinear programming (MINLP) formulation to synthesize work-heat exchanger networks (WHENs). We propose a superstructure that explicitly considers constant-pressure streams for heat integration and enables an optimized selection of end-heaters and end-coolers to meet the desired temperature targets. Using a few examples, we demonstrate that simultaneous integration of work and heat in a chemical plant can offer significant savings in total annualized cost. In a case study from the literature, our approach yields a network with 3.1% lower total annualized cost, 10.6% more work exchange, and 81.0% more heat exchange than the best solution obtained from the existing literature approach. Furthermore, our approach successfully solves two case studies that previous literature approaches fail to solve. Keywords: Process network synthesis; Energy integration; Power integration; Heat integration; Work-heat exchange (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:113:y:2016:i:c:p:1006-1017 DOI: 10.1016/j.energy.2016.07.124 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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