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A method of reducing energy consumption in a multi-effect absorption system. The multi-effect absorption system includes a primary generator for a primary desorption process and a secondary generator for a secondary desorption process. In the method, heat is provided to the primary generator from a

A method of reducing energy consumption in a multi-effect absorption system. The multi-effect absorption system includes a primary generator for a primary desorption process and a secondary generator for a secondary desorption process. In the method, heat is provided to the primary generator from a primary heat source for the primary desorption process. Heat generating devices are cooled with the multi-effect absorption system while the generated heat is collected and transferred to the to the secondary generator for use in the secondary desorption process thereby reducing the amount of heat required from the primary heat source and reducing the energy consumption of the absorption system.

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What is claimed is: 1. A method of reducing energy consumption in a multi-effect absorption system having a primary generator for a primary desorption process and a secondary generator for a secondary desorption process, comprising the steps of: providing heat to the primary generator from a primar

What is claimed is: 1. A method of reducing energy consumption in a multi-effect absorption system having a primary generator for a primary desorption process and a secondary generator for a secondary desorption process, comprising the steps of: providing heat to the primary generator from a primary heat source for the primary desorption process; cooling a heat generating device with cooling fluid supplied by the multi-effect absorption system; collecting heat generated by the heat generating device; and transferring the collected heat to the secondary generator for use in the secondary desorption process thereby reducing the amount of heat required from the primary heat source and reducing the energy consumption of the absorption system. 2. The method according to claim 1, wherein the multi-effect absorption system is a double-effect double-condenser system having a primary condenser; wherein the primary condenser dissipates heat, the method further comprising: collecting heat dissipated by the primary condenser; and transferring the collected heat from the primary condenser to the secondary generator for use in the secondary desorption process. 3. The method according to claim 1, wherein the multi-effect absorption system is a double-effect double-absorber system having a primary absorber, wherein the primary absorber dissipates heat, the method further comprising: collecting heat dissipated by the primary absorber; and transferring the collected heat from the primary absorber to the secondary generator for use in the secondary desorption process. 4. The method according to claim 1, wherein the multi-effect absorption system is a triple-effect absorption system having a primary absorber and a primary condenser, wherein the primary absorber and the primary condenser dissipate heat, the method further comprising: collecting heat dissipated by the primary absorber and the primary condenser; and transferring the heat collected from the primary absorber and the primary condenser to the secondary generator for use in the secondary desorption process. 5. The method according to claim 1, wherein the multi-effect absorption system receives cooling fluid heated by the heat generating device, said multi-effect absorption system comprising an evaporator, said method further comprising: cooling the heated cooling fluid through heat exchange between a heat exchanger and die evaporator in the multi-effect absorption system; and supplying the cooled cooling fluid to the heat generating device, wherein the heat generating device is housed in a rack. 6. The method according to claim 5, wherein step of collecting heat generated by the heat generating device comprises collecting heat from the rack housing a plurality of heat generating devices, said rack being housed in room. 7. The method according to claim 6, wherein the step of collecting heat from the rack housing the plurality of heat generating devices comprises collecting heat through at least one vent in a plenum. 8. The method according to claim 6, wherein the step of collecting heat from the rack housing the plurality of heat generating devices comprises collecting heat through a ducting system. 9. The method according to claim 8, wherein the ducting system includes at least one duct having an inlet positioned near one or more of the plurality of heat generating devices in the rack, and wherein the step of collecting heat further comprises collecting heat from one or more of the plurality of heat generating devices through the inlet of the at least one duct. 10. The method according to claim 8, wherein the room includes a plurality of racks, each rack housing one or more heat generating components, wherein the ducting system includes at least one duct per rack, said ducts having inlets positioned near at least one of the one or more heat generating devices in each rack, and wherein the step of collecting heat further comprises collecting heat from the one or more heat generating device trough to inlets of the ducts. 11. The method according to claim 5, further comprising: controlling the flow of heated cooling fluid delivered to heat exchanger and the secondary generator to thereby control the heat supplied to the secondary generator for use in to secondary desorption process. 12. A cooling system for cooling racks housing a plurality of heat generating devices in a room the system comprising: a multi-effect absorption device for cooling and supplying cooling fluid to the racks, the absorption device having a primary generator, a secondary generator, and an evaporator; a primary heat source for supplying heat to the primary generator; a plenum in fluid communication with the racks for drawing cooling fluid heated by the heat generating devices, said plenum being in fluid communication with a heat exchanger and the secondary generator; said heat exchanger for exchanging heat between the heated cooling fluid and a refrigerant contained in the evaporator; and wherein the secondary generator is configured to employ heat from to heated cooling fluid in an absorption process of the refrigerant. 13. The system of claim 12, further comprising a controller for controlling the amount of primary heat supplied to the primary generator from the primary heat source. 14. The system of claim 13, further comprising a temperature sensor for measuring the temperature of the heated cooling fluid and wherein the controller is configured to determine and control the amount of primary heat supplied to the primary generator based upon the detected temperature of the heated cooling fluid. 15. The system of claim 14, wherein the plenum further includes a variable output fan and wherein the controller is configured to control the output of the variable output fan in accordance with the temperature of the heated cooling fluid. 16. The cooling system of claim 12, further comprising a duct system in fluid communication with one or more of the racks for drawing heat from the racks and conveying the drawn heat to the plenum. 17. The system of claim 16, wherein the duct system includes at least one duct for each rack, each duct having an inlet near a respective rack and an outlet near the plenum. 18. The system of claim 16, wherein the plenum is configured as part of the duct system and wherein the duct system includes at least one duct for each rack, each duct having an inlet attached to a respective rack and an outlet attached to the heat exchanger. 19. The system of claim 12, further comprising a valve configured to meter flow of the heated cooling fluid between the heat exchanger and the secondary generator. 20. A multi-effect absorption system having an absorbent and a refrigerant for cooling a heat generating device, comprising: a primary means for desorbing a first amount of the refrigerant from the absorbent; a primary heat source means for providing a variable amount of heat to the primary generator for use in desorbing the first amount of the refrigerant from the absorbent; a secondary means for desorbing a second amount of the refrigerant from the absorbent; and means for transferring heat generated by the heat generating device to the secondary means thereby increasing the second amount of refrigerant desorbed by the secondary means and decreasing the amount of beat required from the primary heat source means. 21. The system of claim 20, wherein the multi-effect absorption system is a double-effect double-condenser system having a primary condenser, the system further including means for transferring heat produced by the primary condenser to the secondary means. 22. The system of claim 20, wherein the multi-effect absorption system is a double-effect double-absorber system having a primary absorber, the system further including means for transferring heat produced by the primary absorber to the secondary means. 23. The system of claim 20, wherein multi-effect absorption system is a triple-effect absorption system having a primary absorber and a primary condenser, the system further including means for transferring heat produced by the primary absorber and the primary condenser to the secondary means. 24. The system of claim 20, wherein the means for transferring heat comprises a duct means and a means for exchanging heat between cooling fluid heated by the heat generating device and an evaporator means of the multi-effect absorption system, wherein the duct means includes an inlet positioned near the heat generating device and an outlet positioned near the means for exchanging heat. 25. The system of claim 24, further comprising a plurality of heat generating devices, wherein the duct means comprises a plurality of ducts for transferring the heat generated by the plurality of heat generating devices to the heat exchanger and the secondary means. 26. The system of claim 25, wherein the duct means includes at least one duct associated with each heat generating device. 27. The system of claim 24, further comprising: means for controlling delivery of cooling fluid heated by the heat generating device to the means for exchanging heat and the secondary means. 28. A computer readable medium on which is embedded one or more computer programs, said one or more computer programs implementing a method for reducing energy consumption in a multi-effect absorption system, said one or more computer programs comprising a set of instructions for: activating to multi-effect absorption system to provide cooling to a heat generating device, the multi-effect absorption system having a primary generator for a primary desorption process and a secondary generator for a secondary desorption process; delivering heat from a primary heat source to the primary generator; cooling a beat generating device with cooling fluid supplied by the multi-effect absorption system; collecting heat generated by the heat generating device; transferring the collected heat to the secondary generator for use in the secondary desorption process; monitoring the amount of collected heat transferred to the secondary generator; and varying the amount of heat provided from the primary heat source in response to the amount of collected heat transferred to the secondary generator thereby reducing the amount of heat required from the primary heat source and reducing the energy consumption of the absorption system. 29. The computer readable storage medium according to claim 28, wherein the multi-effect absorption system is a double-effect double-condenser system having a primary condenser, wherein the primary condenser dissipates heat, the one or more computer programs further comprising a set of instructions for: collecting heat dissipated by the primary condenser; and transferring the collected heat from the primary condenser to the secondary generator for use in the secondary desorption process. 30. The computer readable storage medium according to claim 28, wherein the multi-effect absorption system is a double-effect double-absorber system having a primary absorber, wherein the primary absorber dissipates heat, the one or more computer programs further comprising a set of instructions for: collecting heat dissipated by the primary absorber; and transferring the collected heat from the primary absorber to the secondary generator for use in the secondary desorption process. 31. The computer readable storage medium according to claim 28, wherein the multi-effect absorption system is a triple-effect absorption system having a primary absorber and a primary condenser, wherein the primary absorber and the primary condenser dissipate heat, the one or more computer programs further comprising a set of instructions for: collecting heat dissipated by the primary absorber and the primary condenser; and transferring the heat collected from the primary absorber and the primary condenser to the secondary generator for use in the secondary desorption process. 32. The computer readable storage medium according to claim 28, wherein the multi-effect absorption system receives cooling fluid heated by the heat generating device, said multi-effect absorption system comprising an evaporator, the one or more computer programs further comprising a set of instructions for: cooling the heated cooling fluid through heat exchange between a heat exchanger and the evaporator in the multi-effect absorption system; and supplying the cooled cooling fluid to the heat generating device, wherein the heat generating device is housed in a rack. 33. The computer readable storage medium according to claim 28, the one or more computer programs further comprising a set of instructions for: controlling the flow of heated cooling fluid delivered to a heat exchanger and the secondary generator to thereby control the heat supplied to the secondary generator for use in the secondary desorption process.