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Abstract: The power optimization for a real closed intercooled
regenerated gas turbine (Brayton) cycle coupled to variable-temperature
heat reservoirs is studied by using finite-time thermodynamics. In the
analysis, the irreversibilities involve the heat resistance in four heat
exchangers (the hot- and cold-side heat exchangers, the regenerator and
the intercooler), the irreversible compression and expansion losses in
the compressor and the turbine, and the pressure losses in the piping
are taken into account. The optimal intercooling pressure ratio and the
heat conductance distributions among the four heat exchangers at the
maximum power are obtained by detailed numerical examples. Double
maximum power is obtained by optimizing the total pressure ratio.
Finally, the heat capacity ratio between working fluid and heat
reservoir is also optimized for the thrice-maximum power.
Key words: Finite-time thermodynamic Gas turbine cycle Intercooled
Regenerated Power optimization
CLC No: TK123
全国优秀博士学位论文作者专项资金(200136)和海军工程大学科研基金(HGDJJ03016)资助项目.
Received 20040623, received in revised form 20041124
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