Results of investigations of failures of geothermal direct-use well pumps [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 40 pages : digital, PDF file
Additional Creators:: Oregon Institute of Technology (Klamath Falls, Or.). Geo-Heat Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Failures of 13 geothermal direct-use well pumps were investigated and information obtained about an additional 5 pumps that have been in service up to 23 years, but have not failed. Pumps with extra long lateral and variable-speed drives had the highest correlation with reduced time in service. There appears to be at least circumstantial evidence that recirculation may be a cause of reduced pump life. If recirculation is a cause of pump failures, pump specifiers will need to be more aware of minimum flow conditions as well as maximum flow conditions when specifying pumps. Over-sizing pumps and the tendency to specify pumps with high flow and low Net Positive Suction Head (NPSH) could lead to increased problems with recirculation.

Report Numbers:

E 1.99:doe--13049-1
doe--13049-1

Subject(s):

Geothermal Energy

Other Subject(s):

Note:

Published through SciTech Connect.
12/01/1994.
"doe--13049-1"
"DE95016904"
Culver, G.

Funding Information:

FG07-90ID13040

View MARC record | catkey: 14383135