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TECHNICAL PAPERS: Gas Turbines: Industrial and Cogeneration

A Feasibility Study of Inverted Brayton Cycle for Gas Turbine Repowering

[+] Author and Article Information
M. Bianchi, G. Negri di Montenegro, A. Peretto, P. R. Spina

DIEM-University of Bologna, Viale del Risorgimento, 2, 40136 Bologna, Italy

J. Eng. Gas Turbines Power 127(3), 599-605 (Jun 24, 2005) (7 pages) doi:10.1115/1.1765121 History: Received October 01, 2002; Revised March 01, 2003; Online June 24, 2005
Copyright © 2005 by ASME
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References

Figures

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Compressor stage schematic layout and corresponding velocity triangles
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Expander stage schematic layout and corresponding velocity triangles
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Inverted Brayton cycle (IBC) schematic layout
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Expander outlet pressure (pOE) versus expander inlet temperature (TiE) for ηpCpE=0.86
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Expander outlet pressure (pOE) versus expander inlet temperature (TiE) for ηpCpE=0.90
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Gas turbine outlet temperature (TOGT) versus gas turbine power size
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LHV electric efficiency versus gas turbine power size
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Gas turbine specific work versus gas turbine power size
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Percentage electrical power increase due to the IBC employment versus gas turbine power size
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Corrected mass flow (GT chosen for IBC design: bold; OGTMs to which the IBC can be matched: plain)
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Corrected mass flow (GT chosen for IBC design: bold; OGTMs to which the IBC can be matched: plain)
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Corrected mass flow (GTs chosen for IBC design: bold; OGTMs to which the IBC can be matched: plain)
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Corrected mass flow (GTs chosen for IBC design: bold; OGTMs to which the IBC can be matched: plain)
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Smith diagram 10 with points representative of IBC expanders
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Percentage electrical power increase due to the employment of an IBC ad hoc designed (black bar) and of an IBC designed for another GT (gray bar). Gas turbine power range up to 15 MW.
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Percentage electrical power increase due to the employment of an IBC ad hoc designed (black bar) and of an IBC designed for another GT (gray bar). Gas turbine power range over 15 MW.

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