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TECHNICAL PAPERS: Gas Turbines: Cycle Innovations

Preliminary Study of a Novel R718 Compression Refrigeration Cycle Using a Three-Port Condensing Wave Rotor

[+] Author and Article Information
Amir A. Kharazi, Pezhman Akbari, Norbert Müller

Department of Mechanical Engineering Michigan State University, East Lansing, MI 48824-1226

J. Eng. Gas Turbines Power 127(3), 539-544 (Jun 24, 2005) (6 pages) doi:10.1115/1.1850503 History: Received October 01, 2003; Revised March 01, 2004; Online June 24, 2005
Copyright © 2005 by ASME
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References

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Figures

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Schematic of an R718 cycle with direct condensation and evaporation
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Schematic of an R718 cycle enhanced by a 3-port condensing wave rotor substituting for the condenser and one compressor stage
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Schematic of a 3-port condensing wave rotor
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Regions modeled for each channel during shock compression and condensation
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Schematic wave and phase-change diagram for the 3-port condensing wave rotor (high-pressure part)
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Schematic p–h diagram of an R718 baseline cycle and enhanced cycle with a 3-port condensing wave rotor
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Schematic p–h diagram of an R718 baseline cycle (cooling water cycle not shown) and enhanced cycle with a 3-port condensing wave rotor
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Relative COP increase versus evaporation temperature for different mass flow ratios
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Relative COP increase versus mass flow ratio for different evaporation temperatures
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Relative COP increase versus the wave rotor pressure ratio for different mass flow ratios
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Heat rejecter temperature versus evaporator temperature for different wave rotor pressure ratios
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Performance map: maximum performance increase and optimum wave rotor pressure ratios

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