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Thermodynamic analysis of an irreversible MHD power plant
Author(s) -
El Haj Assad Mamdouh
Publication year - 2000
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/1099-114x(200008)24:10<865::aid-er629>3.0.co;2-o
Subject(s) - magnetohydrodynamic generator , mach number , magnetohydrodynamic drive , constant (computer programming) , magnetohydrodynamics , mechanics , gas compressor , power (physics) , generator (circuit theory) , thermodynamics , entropy (arrow of time) , power station , physics , time constant , magnetic field , engineering , electrical engineering , computer science , quantum mechanics , programming language
A theoretical model to study the performance characteristics of a magnetohydrodynamic (MHD) power plant is presented. The model takes into account the external and internal irreversibilities. General expressions for power and efficiency of the power plant are derived when the MHD generator is operating at constant velocity and constant Mach number conditions. It is shown that when the generator and compressor are running reversibly, the constant velocity and constant Mach number cases are identical in performance and the efficiency at maximum power is identical to Curzon–Ahlborn efficiency. It is also shown that the constant velocity case produces less entropy generation in the generator than that of the constant Mach number case when the generator electrical efficiency is less than one. Copyright © 2000 John Wiley & Sons, Ltd.