A semiconductor chip cooling system having a body that forms a cavity configured to create a spray chamber when conformingly adjoined to a chip, or to a substrate or printed circuit board carrying one or more chips. Inkjet-type sprayers are configured to spray cooling fluid down on the chip. A controller transmits a control signal to the sprayer to cause the sprayer to spray at a rate leading to the cooling fluid being vaporized by the semiconductor device. The cooling system uses cooling fluid surface tension forces to draw liquid cooling fluid up a porous member from the spray chamber back to the sprayers, to be sprayed again. The cooling system uses gravity and/or pressure within the spray chamber to direct vaporized cooling fluid upward from the spray chamber to a condenser. The condenser is configured to cool and condense the vapor. A reservoir is positioned below the condenser and above the sprayers so as to receive condensed vapor from the condenser and feed it to the sprayers.

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Coolant Pump