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A data center includes an air handling system and a thermal energy receptacle system. The air handling system moves air across heat producing components of electrical systems in the data center. The thermal energy receptacle system is coupled to the air handling system. The thermal energy receptacle

A data center includes an air handling system and a thermal energy receptacle system. The air handling system moves air across heat producing components of electrical systems in the data center. The thermal energy receptacle system is coupled to the air handling system. The thermal energy receptacle system includes one or more heat exchangers that exchange heat between air moving through the air handling system and a fluid, one or more phase change material modules including phase change material, and a fluid transport system that transports fluid between the phase change material modules and the heat exchangers. The thermal energy receptacle system transfers heat from air passing over the one or more heat exchangers to at least one of the phase change material modules such that at least a portion of the phase change material changes phase.

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1. A data center, comprising: an air handling system configured to move air across heat producing components of electrical systems in the data center; anda thermal energy receptacle system coupled to the air handling system, wherein the thermal energy receptacle system comprises: one or more phase c

1. A data center, comprising: an air handling system configured to move air across heat producing components of electrical systems in the data center; anda thermal energy receptacle system coupled to the air handling system, wherein the thermal energy receptacle system comprises: one or more phase change material modules, at least one of the one or more phase change materials modules comprising:a container; andan arrangement of a plurality of phase change material elements spaced within the container, wherein each of the plurality of phase change material elements contains phase change material; anda fluid transport system configured to transport fluid between the one or more phase change material modules and one or more heat exchangers, wherein the one or more heat exchangers are in fluid communication with air moving through the air handling system, wherein the fluid of the fluid transport system flows through the one or more heat exchangers, and wherein heat is exchanged from the air moving through the air handling system to the fluid of the fluid transport system flowing though the one or more heat exchangers to cool the air moving through the air handling system; andwherein the thermal energy receptacle system is configured to transfer heat from air passing over the one or more heat exchangers to at least one of the phase change material modules such that at least a portion of the phase change material changes phase. 2. The data center of claim 1, wherein at least one of the phase change material modules comprises: one or more containers configured to hold at least a portion of the fluid; andone or more of the phase change material elements at least partially in the one or more containers, wherein the one or more phase change material elements are configured to receive heat from at least a portion of the fluid in the one or more containers. 3. The data center of claim 1, further comprising a control system configured to control transfer of heat between the air moving through the air handling system and at least a portion of the phase change material. 4. The data center of claim 1, wherein thermal energy receptacle system is configured to increase removal of heat from the air moving through the air handling system when one or more measured air temperatures in or near the data center are above a predetermined threshold. 5. A system, comprising: an air handling system configured to move air across heat producing components of electrical systems; anda thermal energy receptacle system coupled to the air handling system, wherein the thermal energy receptacle system comprises one or more phase change material modules comprising: a container, andan arrangement of a plurality of phase change material elements spaced within the container, wherein each of the plurality of phase change material elements contains phase change material, anda fluid transport system configured to transport a fluid between the one or more phase change material modules and one or more heat exchangers;wherein the one or more heat exchangers are in fluid communication with the air moving through the air handling system, wherein the fluid of the fluid transport system flows through the one or more heat exchangers, and wherein heat is exchanged from the air moving through the air handling system to the fluid of the fluid transport system flowing though the one or more heat exchangers to cool the air moving through the air handling system; andwherein the thermal energy receptacle system is configured to transfer heat from the air moving through the air handling system to at least one of the phase change material modules such that at least a portion of the phase change material changes phase. 6. The system of claim 5, wherein at least one of the phase change material modules is configured to receive heat from the fluid such that at least the portion of the phase change material melts. 7. The system of claim 6, wherein the fluid transported between the air moving through the air handling system and at least of the one or more phase change material modules comprises air. 8. The system of claim 6, wherein the fluid transported between the air moving through the air handling system and at least one of the one or more phase change material modules comprises a liquid. 9. The system of claim 6, wherein the thermal energy receptacle system comprises a pump configured to move the fluid over at least some of the phase change material elements. 10. The system of claim 6, wherein at least one of the one or more phase change material modules comprises: one or more of the containers configured to hold the fluid; andone or more of the phase change material elements comprising phase change material, wherein the phase change material elements are configured to receive heat from at least a portion of the fluid in the one or more containers. 11. The system of claim 6, wherein at least one of the phase change material modules comprises one or more tubes configured to transport the fluid over at least some of the phase change material elements. 12. The system of claim 6, wherein thermal energy receptacle system comprises the one or more heat exchangers configured to exchange the heat between the air moving through the air handling system and at least a portion of the fluid. 13. The system of claim 6, wherein thermal energy receptacle system comprises the one or more heat exchangers configured to exchange the heat between outdoor air and at least a portion of the fluid. 14. The system of claim 5, further comprising a control system configured to control transfer of heat between the air moving through the air handling system and at least a portion of the phase change material. 15. The system of claim 14, wherein the system is configured to be deployed within a data center, andwherein the control system is configured to: sense at least one of characteristic of air in or near the data center; andchange a rate of transfer of heat from the air to the phase change material based on predetermined characteristics of the air. 16. The system of claim 15, wherein the control system is configured to increase heat removal by the thermal energy receptacle system from air moving in the data center when an air temperature is above a predetermined level. 17. The system of claim 14, wherein the control system is configured to add or remove one or more of the phase change material elements from thermal communication with one or more fluids. 18. The system of claim 14, wherein control system is configured control the thermal energy receptacle system based on a periodic cycle. 19. The system of claim 5, wherein the air handling system further comprises one or more mechanical cooling systems configured to remove heat from the air moving through the air handling system. 20. The system of claim 5, wherein the system comprises a data center, wherein the data center comprises one or more computing rooms, wherein at least some of the heat producing components are in the computing room, wherein the system further comprises a mixing plenum configured to mix outside air with air returned from at least one of the one or more computing rooms of the data center, wherein the thermal energy receptacle system is configured to exchange heat with air mixed in the mixing plenum. 21. The system of claim 5, wherein the air handling system is configurable to receive heat from the fluid such that at least a portion of the phase change material solidifies. 22. The system of claim 5, further comprising a chilled water system, wherein the chilled water system is configurable to remove heat from at least one of the phase change material modules. 23. The system of claim 5, wherein at least one of the one or more phase change material modules comprises one or more of the containers configured to hold one or more phase change material elements, wherein at least at a portion of at least one of the containers is in fluid communication with outside air, wherein the at least one of the containers is configured to reject at least a portion of the heat in the phase change material elements to the outside air. 24. A thermal energy receptacle system for a computing room of a data center, comprising: one or more phase change material modules, wherein at least one of the one or more phase change material modules comprises: a container; andan arrangement of a plurality of phase change material elements spaced within the container, wherein each of the plurality of phase change material elements contains phase change material; anda fluid transport system configured to transport a fluid between the one or more phase change material modules and one or more heat exchangers;wherein the one or more heat exchangers are in fluid communication with air moving through an air handling system, wherein the fluid of the fluid transport system flows through the one or more heat exchangers, and wherein heat is exchanged from the air moving through the air handling system to the fluid of the fluid transport system flowing though the one or more heat exchangers to cool the air moving through the air handling system, andwherein at least some of the heat transferred from the air to the fluid of the fluid transport system is further transferred to at least some of the one or more phase change material modules such that phase change material of the at least some phase change material modules changes phase. 25. A method of removing heat from heat producing components in a data center, comprising: moving, via an air handling system, air through a computing room in the data center, wherein at least a portion of the air is moved across heat producing components of electrical systems in the data center;moving, via the air handling system, air heated by the heat producing components out of the computing room of the data center; andtransferring heat from at least a portion of the air in the data center to phase change material in a phase change material module such that a temperature of the air in a least a portion of the computing room is lowered, wherein transferring heat comprises:moving the air, via the air handling system, across one or more heat exchangers of the air handling system, the heat exchanges in fluid communication with the air moving through the air handling system, andtransporting fluid of a fluid transport system through the one or more heat exchangers,wherein heat is exchanged from the air moving through the air handling system to the fluid of the fluid transport system flowing though the one or more heat exchangers to cool the air moving through the air handling system, andwherein at least some of the heat transferred from the air to the fluid of the fluid transport system is further transferred to at least some of the phase change material such that phase change material changes phase. 26. The method of claim 25, wherein transferring the heated air to phase change material comprises: transferring the heat from the heated air to the fluid; andtransferring the heat from the at least a portion of the fluid to the phase change material. 27. The method of claim 25, wherein transfer of the heat in the air to the phase change material is in response to detecting a thermal condition exceeding a predetermined level. 28. The method of claim 25, further comprising transferring at least a portion of the heat from the phase change material to the air to solidify at least a portion of the phase change material. 29. The method of claim 28, wherein transferring the portion of the heat from the phase change material to the air to solidify at least a portion of the phase change material comprises mechanically cooling the air. 30. The method of claim 28, wherein transferring the portion of the heat from the phase change material to the air to solidify at least a portion of the phase change material comprises rejecting the portion of the heat to outside air. 31. The method of claim 25, wherein transferring the heat from the air to the phase change material comprises moving one or more phase change material elements to place at least one of the phase change material elements into thermal communication with the fluid.