Summary
A 1-dimenional tool for preliminary design and performance prediction of oil-free CO2 compressor is presented. The model describes high speed centrifugal compressor in a hermetic configuration supported on foil gas bearings. To give possibly comprehensive overview of the technology, a wide range of loss mechanisms is considered. The model predicts aerodynamic performance of the compressor as well as losses related to the windage of rotor and bearings and due to the internal cooling. Numerical investigation of different compressor stages was used to validate aerodynamic predictions of the 1D model. Maximal prediction discrepancy amounted 2% for efficiency and 5% for pressure ratio. The prediction of the total compressor efficiency was compared with test data from a 50 kW compressor published Sandia Laboratories. The predicted peak compressor efficiencies are between 66 and 67.5% while experimentally measured values are within 65–70% region.
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Details
- Original title: Development of one-dimensional model for initial design and evaluation of oil-free CO2 turbo-compressor.
- Record ID : 30009816
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 8
- Publication date: 2013/12
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Indexing
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Themes:
Compression systems;
Compressors - Keywords: Refrigerating system; Performance; Model; High speed; Development; Oil free compressor; Centrifugal compressor; CO2
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Scale limitations of gas bearing supported turb...
- Author(s) : SCHIFFMANN J., KONTOMARIS K., ARPAGAUS C., et al.
- Date : 2020/01
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 109
- Formats : PDF
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Optimal operational efficiency of chillers usin...
- Author(s) : LISSANDRIN M., RAMPAZZO M., CECCHINATO L., et al.
- Date : 2017/10
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 82
- Formats : PDF
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The part-load efficiency benefit of oil-free, h...
- Author(s) : ALVARES J.
- Date : 2010/07/12
- Languages : English
- Source: 2010 Purdue Conferences. 20th International Compressor Engineering Conference at Purdue.
- Formats : PDF
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Novel partial admission radial compressor for C...
- Author(s) : KUS B., NEKSÅ P.
- Date : 2013/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 8
- Formats : PDF
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Oil-free turbo-compressors for refrigeration ap...
- Author(s) : KUS B., NEKSÅ P.
- Date : 2012/06/25
- Languages : English
- Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Formats : PDF
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