Development of the turbomachinery for the supercritical carbon dioxide power cycle. (4th November 2015)

• Record Type: Journal Article
• Authors: Cho, Junhyun; Choi, Munkyoung; Baik, Young‐Jin; Lee, Gilbong; Ra, Ho‐Sang; Kim, Byunghui; Kim, Minsung
• Other Names: Lee Jang‐Ho guestEditor.
• Is Part Of: International journal of energy research. Volume 40:Number 5(2016)
• Page Start: 587
• Page End: 599
• Publication Date: 2015-11-04
• Subjects: supercritical carbon dioxide -- Brayton cycle -- turbomachinery -- compressor -- turbine; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.3453
• Languages: English
• ISSNs: 0363-907X

Abstract

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. Abstract : For a supercritical CO2 Brayton power cycle, a shrouded type of a compressor impeller and a turbine wheel with labyrinth seals were designed to overcome thrust balancing problems.