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ผลลัพธ์ (ไทย) 1:

unseal

ผลลัพธ์ (ไทย) 2:

Based on the detailed analysis described in this study, a totally oil-free, high-speed efficient centrifugal compressor using advanced compliant foil bearings and seals has been designed for hydrogen pipeline delivery. Operating at speeds of 56-67 krpm, a modular double entry compressor was configured to deliver from 500,000 kg/day at pressures to 8.8 MPa. In order to achieve optimum efficiency and pressure ratio, tip speeds in the proposed compressor design reach DN values of greater than 4 Million (where D is diameter in mm and N is speed in rpm) and exceed the capabilities of state-of-art (SOA) oil lubricated bearings by a factor of 2 or more. The double entry, multi-frame design was chosen to minimize thrust loads, machine complexity and power loss. This multi-frame system concept also offers a high degree of modularity to account for differing inlet conditions and requirements. The proposed compressor is approximately 20 times smaller in volume than SOA centrifugal compressors.
A high performance concept has been designed, which achieves the design targets with six stages or two frames. While this design concept provides a compact and lower power design, the increased operating speeds reduce the margin of safety with respect to stress and rotordynamics. Such high performance with reduced margin may have higher individual component and material costs but lower overall system and operating costs. This benefit must be weighed against the potential higher capital cost but overall higher reliability and life of the high-margin concept. Regardless of the approach chosen, this design study has shown the overall viability of the centrifugal compressor for application to pipeline delivery of hydrogen gas

ผลลัพธ์ (ไทย) 3:

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