Determination of silica scale deposition rates and thresholds applied toward protection of injection reservoirs. Quarterly progress report, August 1--December 31, 1997 [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 2 pages : digital, PDF file
Additional Creators:: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Instrumentation and the components required for the probe and reactor assemblies were procured. Probes were fabricated and tested to assess their sensitivity to scaling. In October, the focus was on design and fabrication of the reactors. This required close coordination with welding and machine shop subvendors. Contact was made with the two Nevada power plants where the experimental equipment will be field tested. Each has indicated their support for the project and will accommodate field testing efforts. Lab testing of the components in November determined that a probe sensitivity problem existed. It was decided to request the specification for the materials used by the Costa Rican utility for pipelines and vessels at Miravalles. By building the probe assemblies from these same materials, experimental results would not be subject to the question of whether preferential scaling occurred due to a specific probe material. New probes were manufactured using the same material as the steel pipelines at Miravalles. Electrical problems still existed, however, probably due to the type of excitation used to monitor the scaling effects. Signal conditioning was added between the probe and recorder to convert from direct current to alternating current excitation. This eliminated additional galvanic effects which may have been masking changes in the signal caused by scale formation.

Report Numbers:

E 1.99:doe/id/13532--t1
doe/id/13532--t1

Subject(s):

Geothermal Energy

Other Subject(s):

Note:

Published through SciTech Connect.
01/26/1998.
"doe/id/13532--t1"
"DE98003021"
Booth, G.M. III.
Geothermal Development Associates, Reno, NV (United States)

Funding Information:

FG07-97ID13532

View MARC record | catkey: 14383134