Hybrid cooling systems for low-temperature geothermal power production
By: Andrea Ashwood and Desikan Bharathan
Contributors: Bharathan, D. (Desikan), 1949-; National Renewable Energy Laboratory (U.S.)
Series: NREL/TP-5500-48765; NREL/TP -- 5500-48765.
Publisher: National Renewable Energy Laboratory
Published: 2011
Place of publication: Golden, CO
Language: eng
Format: [electronic resource] /
Number of pages: 62
Subjects: Geothermal power plants; Research; Cooling load; Thermodynamics
Other titles: Hybrid cooling systems for low temperature geothermal power production
Description: The overall objective of this investigation is to identify and evaluate methods by which the net power output of an air-cooled geothermal power plant can be enhanced during hot ambient conditions using minimal amounts of water. This report addresses binary power plants that use a hydrocarbon as the working fluid and utilize an air-cooled condenser (ACC) for heat load rejection. We considered two configurations to mitigate losses in power production: 1) evaporative pre-cooling of the ACC inlet air (without the use of any added heat exchanger) and 2) the use of a water-cooled condenser/heat exchanger in parallel or series with the ACC (or an air-cooled heat exchanger (ACHX)) to split the total condenser load. Steam cycles, though not currently used in industry for low temperature geothermal resources, were also analyzed.
Notes: Title from PDF title screen (NREL, viewed Mar. 14, 2011).

"March 2011."

Includes bibliographical references.

Technical report.

DE-AC36-08GO28308. ARGT.0910.

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