Total Flow Power Generation from Geothermal Resources Using a Helical Screw Expander
- Conference
- New Zealand Geothermal Workshop
- Year
- 1983
- Session
- Power Cycles
- Language
- English
Full text
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Abstract
The Helical Screw Expander, a total flow wellhead generator, was tested by the Ministry of Works Development as part of an International Energy Agency Programme of research, development and demonstration of geothermal equipment. Testing assessed both the performance and the reliability of Helical Screw Expander. The isentropic efficiency of equipment was observed to be approximately 40% for loads greater than half full load. The Helical Screw Expander has the potential to extract more power from low enthalpy geothermal fluid than an atmospheric exhaust steam turbine generator set. Further development work to improve the reliability of the shaft seals must be undertaken.
Copyright 1983, University of Auckland. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.