Electrohydrodynamic pumping in cable pipes. Final report
Many oil-insulated electric power cables are limited by heat buildup caused in part by the low thermal conductivity of the oil. Circulation of the oil is known to reduce the cable temperature, but can lead to excessive pressure buildup on long cables when using conventional pumping methods. An alternate pumping method using distributed electric fields to avoid this pressure buildup is described. Electrohydrodynamic (EHD) pumping was studied both theoretically and experimentally for possible application in underground cable cooling. Theoretical studies included both analytical and finite-element analysis of the flow patterns driven by travelling electric fields. Experimentally, flow rates in a cable-pipe model were measured under a wide variety of operating conditions. Theory and experiment are in agreement for velocities below 10 cm/s, but higher velocities could not be reached in the experiment, due to increased electroconvection and, possibly, turbulence.
- Research Organization:
- Illinois Univ., Urbana (USA)
- OSTI ID:
- 6490241
- Report Number(s):
- EPRI-EL-2834; ON: DE83901838
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
24 POWER TRANSMISSION AND DISTRIBUTION
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
CABLES
CONDUCTOR DEVICES
COOLING
DATA
ELECTRIC CABLES
ELECTRIC FIELDS
ELECTRICAL EQUIPMENT
ELECTROHYDRODYNAMICS
EQUIPMENT
EXPERIMENTAL DATA
FLOW RATE
FLUID FLOW
FLUID MECHANICS
HYDRODYNAMICS
INFORMATION
INSULATING OILS
MECHANICS
NUMERICAL DATA
OIL-FILLED CABLES
OILS
OPERATION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE
POWER TRANSMISSION
PUMPING
PUMPS
THEORETICAL DATA
UNDERGROUND POWER TRANSMISSION