Pumping System Resistant to Cavitation
First Claim
Patent Images
1. A pumping system, comprising:
- a thermal sub-cooling device comprising a cooled portion and a heated portion; and
a pump having an inlet and an outlet, the inlet configured to receive sub-cooled fluid cooled by the cooled portion of the thermal sub-cooling device.
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Abstract
Techniques herein describe a pumping system, adapted to reduce or eliminate fluid cavitation. Optionally, the pumping system is adapted for application to a passive fluid recovery system. In one example, the pumping system includes a pump and a thermal sub-cooling device. The thermal sub-cooling device may sub-cool fluid input to a pump and heat fluid output from the pump, particularly under start-up conditions. In a further example, a controller manages power supplied to both the pump and the thermal sub-cooling device, to transition from an ambient temperature start-up condition to an elevated temperature operating condition.
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Citations
20 Claims
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1. A pumping system, comprising:
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a thermal sub-cooling device comprising a cooled portion and a heated portion; and a pump having an inlet and an outlet, the inlet configured to receive sub-cooled fluid cooled by the cooled portion of the thermal sub-cooling device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pumping system, comprising:
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an enclosure configured to contain fluid in both gas and liquid states; a thermal sub-cooling device comprising a cooled portion and a heated portion; and a pump having a pump inlet and a pump outlet, the pump inlet configured to receive fluid cooled by the cooled portion of the thermal sub-cooling device and the pump outlet configured to provide fluid for transfer through the heated portion of the thermal sub-cooling device and into the enclosure. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A fluid recovery system, comprising:
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an enclosure configured to contain fluid in both gas and liquid states; a plurality of ports defined within the enclosure to remove fluid from the enclosure; a heat exchanger, to receive fluid removed from the ports, to remove heat from fluid, and to condense the fluid; a thermal sub-cooling device to cool fluid output from the heat exchanger; and a pump to input fluid cooled by the thermal sub-cooling device, and to output fluid to the enclosure. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification