The feasibility study on supercritical methane Recuperated Brayton Cycle for waste heat recovery

Handle URI:
http://hdl.handle.net/10754/623478
Title:
The feasibility study on supercritical methane Recuperated Brayton Cycle for waste heat recovery
Authors:
Dyuisenakhmetov, Aibolat ( 0000-0002-4305-8929 )
Abstract:
Recuperated Brayton Cycle (RBC) has attracted the attention of research scientists not only as a possible replacement for the steam cycle at nuclear power plants but also as an efficient bottoming cycle for waste heat recovery and for concentrated solar power. RBC’s compactness and the ease at which it can be integrated into existent power plants for waste heat recovery require few modifications. Methane, carbon dioxide and trifluoromethane are analyzed as possible working fluids. This work shows that it is possible to achieve higher efficiencies using methane under some operating conditions. However, as it turns out, the performance of Recuperated Brayton Cycle should be evaluated based on net output work. When the performance is assessed on the net output work criteria carbon dioxide still proves to be superior to other gases. This work also suggests that piston engines as compressors and expanders may be used instead of rotating turbines since reciprocating pistons have higher isentropic efficiencies.
Advisors:
Dibble, Robert W. ( 0000-0002-4002-9356 )
Committee Member:
Thoroddsen, Sigurdur T ( 0000-0001-6997-4311 ) ; Ng, Kim Choon ( 0000-0003-3930-4127 )
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Program:
Mechanical Engineering
Issue Date:
May-2017
Type:
Thesis
Appears in Collections:
Theses

Full metadata record

DC FieldValue Language
dc.contributor.advisorDibble, Robert W.en
dc.contributor.authorDyuisenakhmetov, Aibolaten
dc.date.accessioned2017-05-14T05:28:41Z-
dc.date.available2017-05-14T05:28:41Z-
dc.date.issued2017-05-
dc.identifier.urihttp://hdl.handle.net/10754/623478-
dc.description.abstractRecuperated Brayton Cycle (RBC) has attracted the attention of research scientists not only as a possible replacement for the steam cycle at nuclear power plants but also as an efficient bottoming cycle for waste heat recovery and for concentrated solar power. RBC’s compactness and the ease at which it can be integrated into existent power plants for waste heat recovery require few modifications. Methane, carbon dioxide and trifluoromethane are analyzed as possible working fluids. This work shows that it is possible to achieve higher efficiencies using methane under some operating conditions. However, as it turns out, the performance of Recuperated Brayton Cycle should be evaluated based on net output work. When the performance is assessed on the net output work criteria carbon dioxide still proves to be superior to other gases. This work also suggests that piston engines as compressors and expanders may be used instead of rotating turbines since reciprocating pistons have higher isentropic efficiencies.en
dc.language.isoenen
dc.subjectBrayton Cycleen
dc.subjectworking fluiden
dc.subjectsupercritical methaneen
dc.subjectCarbon Dioxideen
dc.titleThe feasibility study on supercritical methane Recuperated Brayton Cycle for waste heat recoveryen
dc.typeThesisen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberThoroddsen, Sigurdur Ten
dc.contributor.committeememberNg, Kim Choonen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.nameMaster of Scienceen
dc.person.id143751en
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