Patent ID: 8797741

Claim:
A cold plate system, comprising: a common inlet and a common outlet; first and second flow paths being hydraulically parallel between the common inlet and the common outlet, wherein the first and second flow paths enable two-phase coolant flow under pressure through micro-channels for cooling heat loads on the cold plate system; the first flow path having a first inlet coupled to the common inlet, a first outlet coupled to the common outlet, and first and second orifices located between the first inlet and the first outlet, wherein the first orifice is spaced from the second orifice in the first flow path, the first and second orifices disposed in the first flow path on an inlet side of the first flow path, wherein the first and second orifices each protrude into the first flow path to reduce a cross-sectional area of the first flow path for constricting flow of the coolant; a third orifice spaced from a fourth orifice, the third and fourth orifices disposed in the second flow path on an inlet side of the second flow path; wherein the first and second orifices in the first flow path and the third and fourth orifices in the second flow path minimize a difference in mass flow rate between the first and second flow paths when the first and second flow paths are exposed to different heat loads; and a first card slot aligned with the first flow path to cool a first circuit card assembly seated in the first card slot and a second card slot aligned with the second flow path to cool a second circuit card assembly.