Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor

Deployment of a safe, efficient hydrogen production and delivery infrastructure on a scale that can compete economically with current fuels is needed in order to realize the hydrogen economy. While hydrogen compression technology is crucial to pipeline delivery, positive displacement compressors are...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hooshang Heshmat, Andrew Zhou, Zhaohui Ren, Said Jahanmir, James F. Walton, II
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2013
Materias:	bearings foil bearings seals foil seals hydrogen compressor oil-free bearing design Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/b894145853e544d789fccc67ad4c694d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b894145853e544d789fccc67ad4c694d
record_format	dspace
spelling	oai:doaj.org-article:b894145853e544d789fccc67ad4c694d2021-11-05T09:24:31ZOil-Free Bearings and Seals for Centrifugal Hydrogen Compressor1881-219810.2474/trol.8.44https://doaj.org/article/b894145853e544d789fccc67ad4c694d2013-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/8/1/8_44/_pdf/-char/enhttps://doaj.org/toc/1881-2198Deployment of a safe, efficient hydrogen production and delivery infrastructure on a scale that can compete economically with current fuels is needed in order to realize the hydrogen economy. While hydrogen compression technology is crucial to pipeline delivery, positive displacement compressors are costly, have poor reliability and use oil, which contaminates the hydrogen. A completely oil-free, high-speed, efficient centrifugal compressor using 4th generation compliant foil bearings and seals has been designed for hydrogen pipeline delivery. Using 6-12 MW drives operating at speeds to 56,000 rpm, a modular, double entry compressor was configured to deliver 500,000 kg/day at pressures greater than 8 MPa. Each of the two or three multi-stage compressor frames operate above the bending critical speed of the rotating group since speeds are 5 to 7 times faster than conventional compressors. To assure a structurally and economically feasible design, the rotor of each compressor frame spins at the same speed with blade tip velocities near 600 m/s. An iterative aerodynamic/structural/rotordynamic design process was used, including both quasi-three dimensional inviscid internal flow and Computational Fluid Dynamic (CFD) analyses. The flow field was carefully analyzed for areas of excessive diffusion, sudden velocity gradients and flow separation. Excellent correlation between the preliminary design and CFD analysis was obtained. Structural and rotor-bearing system dynamic analyses were also completed to finalize the compressor system configuration. Finite element analysis of the compressor impeller was used to verify structural integrity and fatigue limits for selected materials. Rotor-bearing system analysis was used to define acceptable bearing locations and dynamic coefficients, system critical speeds and dynamic stability. Given the high speeds, supercritical operation, and required reliability, efficiency and freedom from contaminants, compliant foil gas bearings and seals were designed and evaluated. Since hydrogen will be used as the lubricant for the foil bearings, substantially lower power loss than oil lubricated bearings will be experienced and the auxiliary supply or scavenge system is eliminated.Hooshang HeshmatAndrew ZhouZhaohui RenSaid JahanmirJames F. Walton, IIJapanese Society of Tribologistsarticlebearingsfoil bearingssealsfoil sealshydrogen compressoroil-freebearing designPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 8, Iss 1, Pp 44-63 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	bearings foil bearings seals foil seals hydrogen compressor oil-free bearing design Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	bearings foil bearings seals foil seals hydrogen compressor oil-free bearing design Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hooshang Heshmat Andrew Zhou Zhaohui Ren Said Jahanmir James F. Walton, II Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
description	Deployment of a safe, efficient hydrogen production and delivery infrastructure on a scale that can compete economically with current fuels is needed in order to realize the hydrogen economy. While hydrogen compression technology is crucial to pipeline delivery, positive displacement compressors are costly, have poor reliability and use oil, which contaminates the hydrogen. A completely oil-free, high-speed, efficient centrifugal compressor using 4th generation compliant foil bearings and seals has been designed for hydrogen pipeline delivery. Using 6-12 MW drives operating at speeds to 56,000 rpm, a modular, double entry compressor was configured to deliver 500,000 kg/day at pressures greater than 8 MPa. Each of the two or three multi-stage compressor frames operate above the bending critical speed of the rotating group since speeds are 5 to 7 times faster than conventional compressors. To assure a structurally and economically feasible design, the rotor of each compressor frame spins at the same speed with blade tip velocities near 600 m/s. An iterative aerodynamic/structural/rotordynamic design process was used, including both quasi-three dimensional inviscid internal flow and Computational Fluid Dynamic (CFD) analyses. The flow field was carefully analyzed for areas of excessive diffusion, sudden velocity gradients and flow separation. Excellent correlation between the preliminary design and CFD analysis was obtained. Structural and rotor-bearing system dynamic analyses were also completed to finalize the compressor system configuration. Finite element analysis of the compressor impeller was used to verify structural integrity and fatigue limits for selected materials. Rotor-bearing system analysis was used to define acceptable bearing locations and dynamic coefficients, system critical speeds and dynamic stability. Given the high speeds, supercritical operation, and required reliability, efficiency and freedom from contaminants, compliant foil gas bearings and seals were designed and evaluated. Since hydrogen will be used as the lubricant for the foil bearings, substantially lower power loss than oil lubricated bearings will be experienced and the auxiliary supply or scavenge system is eliminated.
format	article
author	Hooshang Heshmat Andrew Zhou Zhaohui Ren Said Jahanmir James F. Walton, II
author_facet	Hooshang Heshmat Andrew Zhou Zhaohui Ren Said Jahanmir James F. Walton, II
author_sort	Hooshang Heshmat
title	Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
title_short	Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
title_full	Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
title_fullStr	Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
title_full_unstemmed	Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor
title_sort	oil-free bearings and seals for centrifugal hydrogen compressor
publisher	Japanese Society of Tribologists
publishDate	2013
url	https://doaj.org/article/b894145853e544d789fccc67ad4c694d
work_keys_str_mv	AT hooshangheshmat oilfreebearingsandsealsforcentrifugalhydrogencompressor AT andrewzhou oilfreebearingsandsealsforcentrifugalhydrogencompressor AT zhaohuiren oilfreebearingsandsealsforcentrifugalhydrogencompressor AT saidjahanmir oilfreebearingsandsealsforcentrifugalhydrogencompressor AT jamesfwaltonii oilfreebearingsandsealsforcentrifugalhydrogencompressor
_version_	1718444369507254272

Oil-Free Bearings and Seals for Centrifugal Hydrogen Compressor

Ejemplares similares