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This study investigates experimentally the potential of integrating a scroll expander into a microcogeneration steam Rankine cycle. This expander technology is not an existing technical option for such applications; consequently, an existing oil-free scroll compressor is adapted to run in an expander mode with water as working fluid. The performance of the adapted scroll expander, with dry vapour expansion, is characterized using a test bench developed for this specific application. The tested operating conditions include different operating pressure ratios and different rotation speeds. The results show that the volumetric efficiency increases with the rotation speed, while the isentropic efficiency exhibits an optimum value at a given pressure ratio with a rotation speed of 2000 rpm. A first series of experimentations show a poor volumetric efficiency. The latter was improved by replacing the original tip seal of the expander by a polytetrafluorethylene seal. Experimental results obtained after the modification show 20% increase in the volumetric efficiency without affecting the isentropic efficiency. The increase in volumetric efficiency is mainly due to the lower axial clearance between the seals and the wraps of the expander, while the isentropic efficiency was maintained due to the low leakage flow.
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Details
- Original title: Theoretical and experimental study of an oil-free scroll type vapour expander.
- Record ID : 2008-2411
- Languages: English
- Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Publication date: 2008/07/14
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Indexing
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Experimental study of the integration of a scro...
- Author(s) : LEMORT V., TEODORESE I. V., LEBRUN J.
- Date : 2006/07/17
- Languages : English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
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Numerical simulation on scroll expander-compres...
- Author(s) : KIM H. J., AHN J. M., CHO S. O., et al.
- Date : 2006/07/17
- Languages : English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
View record
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Study of cooling production with a combined pow...
- Author(s) : POPA V., COSTIUC L.
- Date : 2009/05/07
- Languages : English
- Source: 3th Conference on Ammonia Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 7-9, 2009.
- Formats : PDF
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Axial and radial force control for CO2 scroll e...
- Author(s) : HIWATA A., IKEDA A., MORIMOTO T., et al.
- Date : 2008/07/14
- Languages : English
- Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
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Analysis of liquid-flooded compression using a ...
- Author(s) : BELL I., LEMORT V., BRAUN J., et al.
- Date : 2008/07/14
- Languages : English
- Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
View record