Thermodynamic analysis of a beer engine |
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| Affiliation: | 1. Department of Materials Sciences and Engineering, City University of Hong Kong, Hong Kong, China;2. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China;3. Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong, China;1. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway;2. Department of Clinical Medicine, University of Bergen, Bergen, Norway;3. Laboratory of Clinical Biochemistry, Section of Clinical Pharmacology, Haukeland University Hospital, Bergen, Norway;4. Department of Surgical Sciences, Haukeland University Hospital, Norway;5. Department of Clinical Science, University of Bergen, Bergen, Norway;6. Centre for Cancer Biomarkers, CCBIO, Department of Clinical Science, University of Bergen, Bergen, Norway;7. Department of Internal Medicine, Hematology Section, Haukeland University Hospital, Bergen, Norway;8. Department of Radiology, Haukeland University Hospital, Bergen, Norway;9. Department of Pathology, Haukeland University Hospital, Bergen, Norway;10. Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, Bergen, Norway;11. Department of Oncology, Haukeland University Hospital, Bergen, Norway;12. Institute of Fundamental Technological Research, Polish Academy of Sciences, Warszawa, Poland;13. School of Electrical and Information Engineering, Chamber of Mines Building, University of the Witwatersrand, Johannesburg, South Africa |
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| Abstract: | This paper shows how the heat reclaimed from the exhaust gas of a gas turbine engine can be used to convert dilute ethyl alcohol (“beer”) to a fuel that can used to power the engine. Ordinarily, there is not enough heat available to distil the weak liquor to sufficient amounts of a strong product (>90%), due to high exergy destruction. In this design, a combination of destructive distillation and ordinary distillation is used, the wet product then being sent to a reformer for an endothermic shift reaction. The high temperature gas is now ready to burn in a gas turbine engine (or high temperature fuel cell). Water in the low temperature stack gas can be reclaimed in a cooling tower, if desired, so as to have no net loss of water for the system. The exergetic (Second Law) efficiency for power production is nearly 50%. |
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