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A modular cooling system ( 10 ) is provided for use in an electronics enclosure ( 12 ) mounting a plurality of heat generating electronic components ( 14 ). The cooling system ( 10 ) includes a cooling liquid supply manifold ( 16 ), a cooling liquid return manifold ( 18 ), and a plurality of cooling

A modular cooling system ( 10 ) is provided for use in an electronics enclosure ( 12 ) mounting a plurality of heat generating electronic components ( 14 ). The cooling system ( 10 ) includes a cooling liquid supply manifold ( 16 ), a cooling liquid return manifold ( 18 ), and a plurality of cooling modules ( 20 ) that are selectively mountable into the electronic enclosure ( 12 ). The cooling system ( 10 ) also includes a wall ( 64 ) fixed in the enclosure to separate the electronic components ( 14 ) from the manifolds ( 16,18 ) to shield the electronic components ( 14 ) from any of the cooling liquid ( 52 ) should it leak from the system ( 10 ).

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1. A modular cooling system for an electronics enclosure mounting a plurality of heat generating electronic components; the cooling system comprising:a plurality of cooling modules selectively mountable into the electronics enclosure, each of the cooling modules comprisingan evaporative cold plate i

1. A modular cooling system for an electronics enclosure mounting a plurality of heat generating electronic components; the cooling system comprising:a plurality of cooling modules selectively mountable into the electronics enclosure, each of the cooling modules comprisingan evaporative cold plate including an evaporative flow path to direct a working fluid through the cold plate in heat exchange relation with electronic components associated with the cold plate to reject heat from the electronic components to the working fluid,a condenser including a condensing flow path to direct the working fluid through the condenser in heat exchange relation with a cooling liquid to reject heat from the working fluid to the cooling liquid, a cooling liquid inlet connection, a cooling liquid outlet connection, and a cooling liquid flow path to direct the cooling liquid through the condenser from the cooling liquid inlet to the cooling liquid outlet in heat exchange relation with the working fluid in the condensing flow path to reject heat from the working fluid to the cooling liquid,a vapor conduit connecting the evaporative cold plate to the condenser to direct vapor phase working fluid from the evaporative flow path to the condensing flow path, anda liquid conduit connecting the condenser to the evaporative cold plate to direct liquid phase working fluid from the condensing flow path to the evaporative flow path;a cooling liquid supply manifold including a plurality of cooling liquid supply connections, each of the supply connections configured to connect with the cooling liquid inlet connection of one of said cooling modules to supply cooling liquid thereto; anda cooling liquid return manifold including a plurality of cooling liquid return connections, each of the return connections configured to connect with the cooling liquid outlet connection of one of said cooling modules to receive cooling liquid therefrom. 2. The modular cooling system of claim 1 further comprising a wall positioned in the enclosure to separate the electronics components and evaporative cold plates from the cooling liquid supply and return manifolds and the condensers of each of said cooling modules to shield the electronic components from the cooling liquid should the cooling liquid leak from the system, the wall including a plurality of openings through which the vapor and liquid conduits may pass. 3. The modular cooling system of claim 2 wherein each of said openings is a notch formed in a side of said wall that allows the vapor and liquid conduits of one of said cooling modules to be inserted into the electronics enclosure without disconnecting the vapor and liquid conduits from the condenser and evaporative cold plate of said one of said cooling modules. 4. The modular cooling system of claim 3 wherein each of said cooling modules further comprises a baffle plate mounted on the cooling module to close one of said openings through which the vapor and liquid conduits of said cooling module pass. 5. The modular cooling system of claim 4 wherein each of said baffle plates is mounted on at least one of the vapor and liquid cooling conduits of the associated cooling module. 6. The modular cooling system of claim 3 further comprising at least one blank baffle that closes at least one of said notches through which the vapor and liquid conduits do not pass. 7. The modular cooling system of claim 1 wherein said connections are configured to releasably connect to allow each of the cooling modules to be releasably connected to the cooling liquid supply and return manifolds. 8. The modular cooling system of claim 7 wherein said connections comprise quick disconnects. 9. The modular cooling system of claim 1 wherein the vapor and liquid conduits of each cooling module are permanently connected to the cold plate and the condenser. 10. The modular cooling system of claim 1 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow pat h, and the liquid conduit form a looped thermosiphon for the working fluid flow through the module. 11. The modular cooling system of claim 1 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a thermosiphon for the working fluid flow through the module. 12. The modular cooling system of claim 1 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a heat pipe for the working fluid flow through the module. 13. The modular cooling system of claim 1 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped heat pipe for the working fluid flow through the module. 14. The modular cooling system of claim 1 wherein at least one of said cooling modules further comprises a pump associated with said liquid conduit to enhance the working fluid flow through the cooling module; the evaporative flow path, the vapor conduit, the condensing flow path, the pump and the liquid conduit forming a pumped two-phase cooling cycle for the working fluid flow through the cooling module. 15. A cooling module for use in a modular cooling system of an electronics enclosure mounting a plurality of heat generating electronic components, the cooling system including a cooling liquid supply manifold and a cooling liquid return manifold; the cooling module comprising:an evaporative cold plate including a cold plate inlet, a cold plate outlet, and an evaporative flow path to direct a working fluid flow from the cold plate inlet to the cold plate outlet in heat exchange relation with electronic components associated with the cold plate to reject heat from the electronic components to the working fluid flow,a condenser including a working fluid inlet, a working fluid outlet, a condensing flow path to direct the working fluid flow through the condenser from the working fluid inlet to the working fluid outlet, a cooling liquid inlet connection configured to releasably connect to the cooling liquid supply manifold to receive cooling liquid therefrom, a cooling liquid outlet connection configured to releasably connect to the cooling liquid return manifold to deliver cooling liquid thereto, and a cooling liquid flow path to direct a cooling liquid through the condenser from the cooling liquid inlet to the cooling liquid outlet in heat exchange relation with the working fluid flow in the condensing flow path to heat from the working fluid flow to the cooling liquid,a vapor conduit connecting the cold plate outlet to the working fluid inlet to direct vapor phase working fluid from the evaporative cold plate to the condenser, anda liquid conduit connecting the working fluid outlet to the cold plate inlet to direct liquid phase working fluid from the condenser to the evaporative cold plate. 16. The cooling module of claim 15 wherein each of said connections is a quick disconnect. 17. The cooling module of claim 15 wherein the vapor conduit is permanently connected to the cold plate outlet and to the working fluid inlet, and the liquid conduit is permanently connected to the liquid phase working fluid outlet and the cold plate inlet. 18. The cooling module of claim 15 wherein the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped thermosiphon for the working fluid flow through the module. 19. The cooling module of claim 15 wherein the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a thermosiphon for the working fluid flow through the module. 20. The cooling module of claim 15 wherein the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a heat pipe for the working fluid flow through the module. 21. The cooling module of claim 15 wherein the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped heat pipe for the working fluid flow through the module. 22. The cooling module of claim 15 further comprising a pump associated with said liquid conduit to enhance the working fluid flow through the cooling module; the evaporative flow path, the vapor conduit, the condensing flow path, the pump and the liquid conduit forming a pumped two-phase cooling cycle for the working fluid flow through the cooling module. 23. A modular cooling system for an electronics enclosure mounting a plurality of heat generating electronic components; the cooling system comprising:a plurality of cooling modules selectively mountable into the electronics enclosure, each of the cooling modules comprisingan evaporative cold plate including an evaporative flow path to direct a working fluid through the cold plate in heat exchange relation with electronic components associated with the cold plate to reject heat from the electronic components to the working fluid,a condenser including a condensing flow path to direct the working fluid through the condenser in heat exchange relation with a cooling fluid to reject heat from the working fluid to the cooling fluid,a vapor conduit connecting the evaporative cold plate to the condenser to direct vapor phase working fluid from the evaporative flow path to the condensing flow path, anda liquid conduit connecting the condenser to the evaporative cold plate to direct liquid phase working fluid from the condensing flow path to the evaporative flow path,a cooling fluid supply manifold to direct the cooling fluid to each of the condensers;a cooling fluid return manifold to direct the cooling fluid from each of the condensers; anda wall positioned in the electronics enclosure to separate the electronic components and evaporative cold plates from the cooling fluid supply and return manifolds and the condensers of each of said cooling modules to shield the electronic components from the cooling fluid should the cooling fluid leak from the system, the wall including a plurality of notches through which the vapor and liquid conduits may pass, each of said notches is formed in a side of said wall to allow the vapor and fluid conduits of one of said cooling modules to be inserted into the electronics enclosure without disconnecting the vapor and liquid conduits from the condenser and evaporative cold plate of said one of said cooling modules. 24. The modular cooling system of claim 23 wherein each of said cooling modules further comprises a baffle plate mounted on the cooling module to close one of said notches through which the vapor and liquid conduits of said cooling module pass. 25. The modular cooling system of claim 24 wherein each of said baffle plates is mounted on at least one of the vapor and liquid cooling conduits of the associated cooling module. 26. The modular cooling system of claim 23 further comprising at least one blank baffle that closes at least one of said notches through which the vapor and liquid conduits do not pass. 27. The modular cooling system of claim 23 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped thermosiphon for the working fluid flow through the module. 28. The modular cooling system of claim 23 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a thermosiphon for the working fluid flow through the module. 29. The modular cooling system of claim 23 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a heat pipe for the working fluid flow through the module. 30. The modular cooling system of claim 23 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped heat pipe for the working fluid flow through the module. 31. The modular cooling system of claim 23 wherein at least one of said cooling modules further comprises a pump associated with said liquid conduit to enhance the working fluid flow through the cooling module; the evaporative flow path, the vapor conduit, the condensing flow path, the pump and the liquid conduit forming a pumped two-phase cooling cycle for the working fluid flow through the cooling module. 32. The modular cooling system of claim 23 wherein:each of said condenser's further comprises a cooling fluid inlet connection, a cooling fluid outlet connection, and a cooling fluid flow path to direct the cooling fluid through the condenser from the cooling fluid inlet to the cooling fluid outlet in heat exchange relation with the working fluid flow in the condensing flow path to reject heat from the working fluid to the cooling fluid;the cooling fluid supply manifold comprises a plurality of cooling fluid supply connections, each of the supply connections configured to connect with the cooling fluid inlet connection of one of said cooling modules to supply the cooling fluid thereto; andthe cooling fluid return manifold comprises a plurality of cooling fluid return connections, each of the return connections configured to connect with the cooling fluid outlet connection of one of said cooling modules to receive the cooling fluid therefrom. 33. The modular cooling system of claim 23 further comprising a plurality of heat exchangers extending between the cooling fluid supply manifold and the cooling fluid return manifold, each of the heat exchangers including a cooling fluid flow path to direct the cooling fluid from the cooling fluid supply manifold to the cooling fluid return manifold; and whereineach of the condensers is engagable with one of the heat exchangers to place the working fluid flow in the condensing flow path of the condenser in heat exchange relation with the cooling fluid in the cooling fluid flow path to reject heat from the working fluid to the cooling fluid. 34. A modular cooling system for an electronics enclosure mounting a plurality of heat generating electronic components; the cooling system comprising:a plurality of cooling modules selectively mountable into the electronics enclosure, each of the cooling modules comprisingan evaporative cold plate including an evaporative flow path to direct a working fluid through the cold plate in heat exchange relation with electronic components associated with the cold plate to reject heat from the electronic components to the working fluid,a condenser including a condensing flow path to direct the working fluid flow through the condenser in heat exchange relation with a cooling liquid to reject heat from the working fluid to the cooling liquid,a vapor conduit connecting the evaporative cold plate to the condenser to direct vapor phase working fluid from the evaporative flow path to the condensing flow path, anda liquid conduit connecting the condenser to the evaporative cold plate to direct liquid phase working fluid from the condensing flow path to the evaporative flow path,a cooling liquid supply manifold to direct the cooling liquid to each of the condensers;a cooling liquid return manifold to direct the cooling liquid from each of the condensers; anda wall positioned in the electronics enclosure to separate the electronic components and evaporative cold plates from the cooling liquid supply and return manifolds and the condensers of each of said cooling modules to shield the electronic components from the cooling liquid should the cooling liquid leak from the system. 35. The cooling system of claim 34 wherein the wall comprises a plurality of notches through which the vapor and liquid conduits may pass, each of said notches is formed in a side of said wall to allow the vapor and fluid conduits of one of said cooling modules to be inserted into the electronics enclosure without disconnecting the vapor and liquid conduits from the condense r and the cold plate of said one of said cooling modules. 36. The modular cooling system of claim 35 wherein each of said cooling modules further comprises a baffle plate mounted on the cooling module to close one of said notches through which the vapor and liquid conduits of said cooling module pass. 37. The modular cooling system of claim 36 wherein each of said baffle plates is mounted on at least one of the vapor and liquid cooling conduits of the associated cooling module. 38. The modular cooling system of claim 35 further comprising at least one blank baffle that closes at least one of said notches through which the vapor and liquid conduits do not pass. 39. The modular cooling system of claim 34 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped thermosiphon for the working fluid flow through the module. 40. The modular cooling system of claim 34 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a thermosiphon for the working fluid flow through the module. 41. The modular cooling system of claim 34 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a heat pipe for the working fluid flow through the module. 42. The modular cooling system of claim 34 wherein for each cooling module, the evaporative flow path, the vapor conduit, the condensing flow path, and the liquid conduit form a looped heat pipe for the working fluid flow through the module. 43. The modular cooling system of claim 34 wherein at least one of said cooling modules further comprises a pump associated with said liquid conduit to enhance the working fluid flow through the cooling module; the evaporative flow path, the vapor conduit, the condensing flow path, the pump and the liquid conduit forming a pumped two-phase cooling cycle for the working fluid flow through the cooling module. 44. The modular cooling system of claim 34 wherein:each of said condenser's further comprises a cooling liquid inlet connection, a cooling liquid outlet connection, and a cooling liquid flow path to direct the cooling liquid through the condenser from the cooling liquid inlet to the cooling liquid outlet in heat exchange relation with the working fluid flow in the condensing flow path to reject heat from the working fluid to the cooling liquid;the cooling liquid supply manifold comprises a plurality of cooling liquid supply connections, each of the supply connections configured to connect with the cooling liquid inlet connection of one of said cooling modules to supply the cooling liquid thereto; andthe cooling liquid return manifold comprises a plurality of cooling liquid return connections, each of the return connections configured to connect with the cooling liquid outlet connection of one of said cooling modules to receive the cooling liquid therefrom. 45. The modular cooling system of claim 34 further comprising a plurality of heat exchangers extending between the cooling liquid supply manifold and the cooling liquid return manifold, each of the heat exchangers including a cooling liquid flow path to direct the cooling liquid from the cooling liquid supply manifold to the cooling liquid return manifold; and whereineach of the condensers is engagable with one of the heat exchangers to place the working fluid flow in the condensing flow path of the condenser in heat exchange relation with the cooling liquid in the cooling liquid flow path to reject heat from the working fluid to the cooling liquid.