Method and apparatus for improving pump net positive suction hea

Pumps – Combined

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Details

417 53, 62 501, 62 506, F04B 3914, F17C 702

Patent

active

055139612

ABSTRACT:
A method and apparatus are disclosed for improving the available pump net positive suction head in a system for pumping liquid from a storage tank. When the liquid in the system is at or near its boiling point, a pump suction vessel is used to store and cool the liquid. The liquid in the pump suction vessel is kept at a temperature lower than its boiling point by surrounding the vessel with a jacketed space containing liquid from the storage tank. As the liquid in the jacketed space evaporates, the vapor is vented to the storage tank and more liquid is fed into the jacketed space.

REFERENCES:
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patent: 4932214 (1990-06-01), Nieratscher et al.
Beale, "LNG as a Transportation Fuel TOPTEC." Paper Presented at SAE (Jan. 1993).
Biederman et al., "Evaluation and Economic Analysis of LNG for Heavy-Duty Transportation Applications." The LNG Observer (1990/1991).
"NVE's New LGN Station Design." LNG Express (Jan./Feb. 1993).
"Houston Metro's Fueling Stations Go On-line." LNG Express Project Survey (May/Jun. 1993).

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