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Impacts of thermos-physical properties on plate-fin multi-stream heat exchanger design in cryogenic process for CO 2 capture
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Energy Processes.
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2019 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, p. 1445-1453Article in journal (Refereed) Published
Abstract [en]

Oxy-fuel combustion is one of the most promising technologies for CO 2 capture for power plants. In oxy-fuel combustion plants, cryogenic process can be applied for CO 2 purification because the main impurities in flue gas are non-condensable gases. The multi-stream plate-fin heat exchanger is one of the most important components in the CO 2 cryogenic system. In-depth understanding of the impacts of property on the heat exchanger is of importance for appropriate design. In order to investigate the impacts of properties on sizing the heat exchanger and to further identify the key properties to be prioritized for the property model development, this paper presented the design procedure for the plate-fin multi-stream heat exchanger for the CO 2 cryogenic process. Sensitivity study was conducted to analyze the impacts of thermos-physical properties including density, viscosity, heat capacity and thermal conductivity. The results show that thermal conductivity has the most significant impact and hence, developing a more accurate thermal conductivity model is more important for the heat exchanger design. In addition, even though viscosity has less significant impact compared to other properties, the larger deviation range of current viscosity models may lead to higher uncertainties in volume design and annual capital cost of heat exchanger.

Place, publisher, year, edition, pages
Elsevier, 2019. p. 1445-1453
Keywords [en]
CO 2 mixture, Cryogenic process, Heat exchanger, Sensitivity study, Thermos-physical property, Air purification, Carbon dioxide, Chromium compounds, Combustion, Cryogenics, Design, Fins (heat exchange), Fuels, Gas fuel purification, Gas plants, Heat exchangers, Specific heat, Viscosity, Appropriate designs, Heat exchanger design, In-depth understanding, Non-condensable gas, Plate-fin heat exchanger, Sensitivity studies, Thermal conductivity model, Thermal conductivity
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-248171DOI: 10.1016/j.applthermaleng.2018.12.066ISI: 000460492300127Scopus ID: 2-s2.0-85059479126OAI: oai:DiVA.org:kth-248171DiVA, id: diva2:1306842
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QC 20190425

Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-10-17Bibliographically approved

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Tan, YutingYan, Jinyue

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