Cryogenic Pumps
AssigneeWestport Power Inc.
InventorsAlexis Lefevre, Pierre Papirer
Life of this patent
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Abstract
A cryogenic pump for a cryogenic liquid has associated therewith a heater for vaporizing the cryogenic liquid. The heater comprises a chamber (bounded by an inner sleeve and an outer sleeve), a helical heating coil having a plurality of turns disposed within the chamber, an inlet for cryogenic liquid communicating with the heat exchange coil and an outlet for resulting heated fluid communicating with the heat exchange coil. An inlet and an outlet from the water chamber for heat exchange fluid are provided. The heater chamber has a helical baffle having a plurality of turns for guiding the heat exchange fluid over the turns of the heat exchange coil. The turns of the baffle are interspaced with the turns of coil.
Claims8
A cryogenic pump for pumping a cryogenic liquid natural gas has associated therewith a heater for vaporizing the cryogenic liquid, the heater comprising:
- (a) a chamber bounded by an inner sleeve and an outer sleeve;
- (b) a helical heat exchange coil having a plurality of turns disposed within said heater chamber;
- (c) an inlet with cryogenic liquid communicating with said heat exchange coil;
- (d) an outlet for resulting vaporized fluid communicating with said heat exchange coil;
- (e) an inlet to said heater chamber for a heat exchange fluid;
- and
- (f) an outlet from said heater chamber for said heat exchange fluid;
- wherein said heater chamber has a helical baffle having a plurality of turns for guiding said heat exchange fluid over said turns of said heat exchange coil, said turns of said baffle being interspaced with said turns of said heat exchange coil.
Dependencies are inferred from the claim text.