Optimizing the Heat Exchanger Network of a Steam Reforming System

Mads Pagh Nielsen, Anders Risum Korsgaard, Søren Knudsen Kær

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

Abstract

Proton Exchange Membrane (PEM) based combined heat and power production systems are highly integrated energy systems. They may include a hydrogen production system and fuel cell stacks along with post combustion units optionally coupled with gas turbines. The considered system is based on a natural gas steam reformer along with gas purification reactors to generate clean hydrogen suited for a PEM stack. The temperatures in the various reactors in the fuel processing system vary from around 1000°C to the stack temperature at 80°C. Furthermore, external heating must be supplied to the endothermic steam reforming reaction and steam must be generated. The dependence of the temperature profiles on conversion in shift reactors for gas purification is also significant. The optimum heat integration in the system is thus imperative in order to minimize the need for hot and cold utilities. A rigorous 1D stationary numerical system model was used and process integration techniques for optimizing the heat exchanger network for the reforming unit are proposed. Objective is to minimize the system cost. Keywords: Fuel cells; Steam Reforming; Heat Exchanger Network (HEN) Synthesis; MINLP.
Original languageEnglish
Title of host publicationProceedings of the SIMS 2004 Conference
Publisher<Forlag uden navn>
Publication date2004
Pages181-188
ISBN (Print)8774753169
Publication statusPublished - 2004
EventThe 45th Conference on Simulation and Modelling (SIMS 2004) - København, Denmark
Duration: 23 Sep 200424 Sep 2004
Conference number: 45

Conference

ConferenceThe 45th Conference on Simulation and Modelling (SIMS 2004)
Number45
CountryDenmark
CityKøbenhavn
Period23/09/200424/09/2004

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