dc.contributor.author |
Le Roux, Willem Gabriel
|
|
dc.contributor.author |
Bello-Ochende, Tunde
|
|
dc.contributor.author |
Meyer, Josua P.
|
|
dc.date.accessioned |
2012-10-05T14:28:52Z |
|
dc.date.available |
2012-10-05T14:28:52Z |
|
dc.date.issued |
2012 |
|
dc.description.abstract |
The Brayton cycle’s heat source can be obtained from solar energy instead of the combustion of fuel. The
irreversibilities of the open and direct solar thermal Brayton cycle with recuperator are mainly due to
heat transfer across a finite temperature difference and fluid friction, which limit the net power output of
such a system. In this work, the method of total entropy generation minimisation is applied to optimise
the geometries of the receiver and recuperator at various steady-state weather conditions. For each
steady-state weather condition, the optimum turbine operating point is also found. The authors
specifically investigate the effect of wind and solar irradiance on the maximum net power output of the
system. The effects of other conditions and constraints, on the maximum net power output, are also
investigated. These include concentrator error, concentrator reflectivity and maximum allowable surface
temperature of the receiver. Results show how changed solar beam irradiance and wind speed affect the
system net power output and optimum operating point of the micro-turbine. A dish concentrator with
fixed focal length, an off-the-shelf micro-turbine and a modified cavity receiver is considered. |
en_US |
dc.description.uri |
http://www.elsevier.com/locate/energy |
en_US |
dc.identifier.citation |
W.G. Le Roux, T. Bello-Ochende & J.P. Meyer, Optimum performance of the small-scale open and direct solar thermal Brayton cycle at various environmental conditions and constraints, Energy, NYP (2012), doi: 10.1016/j.energy.2012.03.034. |
en_US |
dc.identifier.issn |
0360-5442 (print) |
|
dc.identifier.issn |
1873-6785 (online) |
|
dc.identifier.other |
10.1016/j.energy.2012.03.034 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/20070 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.rights |
© 2012 Elsevier. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, NYP, doi: 10.1016/j.energy.2012.03.034. |
en_US |
dc.subject |
Recuperator |
en_US |
dc.subject |
Receiver |
en_US |
dc.subject.lcsh |
Heat -- Transmission |
en |
dc.subject.lcsh |
Brayton cycle |
en |
dc.subject.lcsh |
Solar energy |
en |
dc.title |
Optimum performance of the small-scale open and direct solar thermal Brayton cycle at various environmental conditions and constraints |
en_US |
dc.type |
Postprint Article |
en_US |