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A cooling system is configured to supply individually metered amounts of cooling fluid to heat generating components of an electronic system. The cooling system includes at least one variable speed fan configured to supply fluid through a centralized plenum and thereafter through a plurality of nozz

A cooling system is configured to supply individually metered amounts of cooling fluid to heat generating components of an electronic system. The cooling system includes at least one variable speed fan configured to supply fluid through a centralized plenum and thereafter through a plurality of nozzles to the components of the electronic system. Each of the nozzles contains a valve to control the amount of fluid flow through the each of the nozzles. A controller is provided to control the operation of the variable speed fan and the operation of each of the valves is also controlled by a controller.

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1. An electronic system comprising:a plurality of heat generating components; and a cooling system configured to supply cooling fluid to the plurality of heat generating components, said cooling system comprising: a variable speed blower; a plenum having an inlet and a plurality of outlets, wherein

1. An electronic system comprising:a plurality of heat generating components; and a cooling system configured to supply cooling fluid to the plurality of heat generating components, said cooling system comprising: a variable speed blower; a plenum having an inlet and a plurality of outlets, wherein said inlet of said plenum is in fluid communication with said blower; a plurality of nozzles, said plurality of nozzles having a first end and a second end, each of said first ends of said nozzles being connected to said plurality of outlets of said plenum and each of said second ends of said nozzles terminating at a location with respect to respective ones of the plurality of heat generating components such that the plurality of heat generating components are within respective impinging zones of the cooling fluid flowing out of the plurality of nozzles; and a valve located at a position along each of said nozzles to independently vary a flow of said cooling fluid through each of said nozzles to provide substantially independent amounts of cooling fluid to the plurality of heat generating components. 2. The system according to claim 1, further comprising:a plurality of valve controllers, said plurality of valve controllers being connected to at least one of said valves, wherein said plurality of valve controllers are operable to independently control each of said valves to thereby control the flow of the cooling fluid through each of said nozzles. 3. The system according to claim 2, further comprising:a plurality of temperature sensors, said plurality of temperature sensors being configured to measure the temperatures of the plurality of heat generating components, wherein said valve controllers are configured to independently control each of said valves in response to said measured temperatures of the plurality of heat generating components. 4. The system according to claim 2, wherein each of said valve controllers is operable to independently control each of said valves based upon anticipated amounts of heat predicted to be generated by the plurality of heat generating components.5. The system according to claim 2, further comprising:a blower controller operable to control the speed of said blower, wherein said blower controller is operable to vary an output of the cooling fluid from said blower in response to signals received from said plurality of valve controllers to thereby vary the cooling fluid supply in said plenum. 6. The system according to claim 1, wherein said plenum includes a divider, said divider positioned to divide said plenum into a first chamber and a second chamber.7. The system according to claim 6, wherein said first chamber is in fluid communication with said blower and said second chamber is in fluid communication with said nozzles, and wherein said divider operates to maintain a pressure of the cooling fluid in said second chamber at a substantially uniform pressure.8. The system according to claim 1, wherein said valves comprise pulsating valves.9. A rack system for housing a plurality of heat generating components, said rack system-comprising:an enclosure having at least one side wall, said at least one side wall having a plenum including a divider separating said plenum into a first chamber and a second chamber, said second chamber comprising a plurality of outlets for discharging a cooling fluid into a space inside the enclosure; at least one variable speed blower configured to supply the cooling fluid into said plenum; a plurality of nozzles having a first end in fluid communication with each of said plurality of outlets and a second end extending into the space of the enclosure; and a plurality of valves, each of said valves being operable to vary the flow of the cooling fluid through each of said nozzles. 10. The rack system according to claim 9, further comprising:a plurality of valve controllers, each of said valve controllers being connected to at least one of said valves, wherein said plurality of valve controllers are operable to independently control each of said valves to thereby control the flow of the cooling fluid through each of said nozzles; and a blower controller operable to control the speed of said blower, wherein said blower controller is operable to vary the output of the cooling fluid from said blower in response to signals received from said plurality of valve controllers to thereby vary the cooling fluid supply in said plenum. 11. The rack system according to claim 9, comprising:a plurality of heat generating components housed in the enclosure and selected from the group consisting of processors, micro-controllers, high speed video cards, disk drives, semi-conductor devices, and combinations thereof. 12. The rack system according to claim 11, further comprising:a plurality of temperature sensors, said plurality of temperature sensors being configured to measure the temperatures of the plurality of heat generating components, wherein said valve controllers are configured to independently control each of said valves in response to said measured temperatures of the plurality of heat generating components. 13. The rack system according to claim 11, wherein each of said valve controllers is operable to independently control each of said valves based upon anticipated amounts of heat predicted to be generated by the plurality of heat generating components.14. The rack system according to claim 9, wherein the first chamber is in fluid communication with the blower and the second chamber is in fluid communication with the plurality of nozzles, and wherein the divider operates to maintain a pressure of the cooling fluid in the second chamber at a substantially uniform pressure.15. An electronic device comprising:means for generating heat; and means for cooling the plurality of heat generating means, said means for cooling comprising: means for variably supplying a plenum with cooling fluid; means for delivering the cooling fluid from the plenum to the means for generating heat, said means for delivering comprising a nozzle that terminates at a location with respect to the means for generating heat such that the means for generating heat is within an impinging zone of the cooling fluid flowing out of the nozzle; and means for varying the cooling fluid flow through the means for delivering. 16. The electronic device according to claim 15, further comprising:means for controlling the means for varying the cooling fluid flow through the means for delivering. 17. The electronic device according to claim 16, further comprising:means for detecting the temperatures of the plurality of heat generating means, said means for controlling the means for varying the cooling fluid flow being configured to vary the cooling fluid flow through the means for delivering in response to the temperatures detected by the means for detecting. 18. The electronic device according to claim 15, further comprising:means for dividing the plenum into a first chamber and a second chamber. 19. The electronic device according to claim 18, wherein the means for dividing the plenum operates to maintain a pressure of the cooling fluid in the second chamber at a substantially uniform pressure.20. The electronic device according to claim 15, further comprising:means for controlling the means for variably supplying the cooling fluid, the means for controlling the means for variably supplying the cooling fluid being operable to vary the supply of cooling fluid into the plenum in response to the cooling fluid flow through the means for delivering.