Community Research and Development Information Service - CORDIS


Since most geothermal resources in the world are liquid dominated, some having a high rate of non-condensable gases and/or TDS (Total Dissolved Solids), their exploitation may not pay or may be impossible with conventional technology i.e. single or dual flash cycles. Two-phase expansion systems are more promising as they are thermodynamically more effective. Recovery of the whole energy of the geothermal resource (Total Flow Concept) means that to compete with a flashed steam turbine, a two-phase flow turbine needs only to reach 40% efficiency, without consideration of material, operation and maintenance costs which could be lessened. A test bench has been implemented, comprising the generation of pressurised liquid and steam, capable of achieving the simulation of water dominated geothermal brines. Single and two-phase inlet injection nozzles have been tested alone and with different turbine housing configurations.

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Authors: DEHAINE F, Bertin et Cie., Plaisir (FR);SCHLEGEL R, Bertin et Cie., Plaisir (FR);UNGEMACH P, Bertin et Cie., Plaisir (FR)
Bibliographic Reference: EUR 12214 FR (1990) 121 pp., MF, ECU 8
Availability: (2)
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