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Development of the turbomachinery for the supercritical carbon dioxide power cycle
Author(s) -
Cho Junhyun,
Choi Munkyoung,
Baik YoungJin,
Lee Gilbong,
Ra HoSang,
Kim Byunghui,
Kim Minsung
Publication year - 2016
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/er.3453
Subject(s) - shroud , brayton cycle , turbomachinery , gas compressor , centrifugal compressor , turbine , impeller , supercritical fluid , supercritical carbon dioxide , working fluid , rotordynamics , engineering , mechanical engineering , thermal efficiency , nuclear engineering , rotor (electric) , chemistry , thermodynamics , physics , combustion , organic chemistry
Summary A supercritical carbon dioxide power cycle has been focused as a promising power cycle because of its compactness, a high efficiency, and a wide applicability. A 10‐kWe‐class simple unrecuperated supercritical carbon dioxide Brayton experimental loop including a turbo‐alternator‐compressor unit using a centrifugal compressor and a radial turbine was developed. A shrouded type of a compressor impeller and a turbine wheel with labyrinth seals were designed to overcome thrust balancing problems of the high‐pressure fluid turbomachinery. In addition, this type has no issues on the thermal growth collision failure and clearance loss between a shroud and a wheel. Preliminary operation at 30,000 rpm, turbine inlet temperature of 83 °C, and pressure of 8500 kPa was successful. It is founded that all states of the cycle existed in the supercritical region. Copyright © 2015 John Wiley & Sons, Ltd.