CN113623895B - Combined cooling heating and power system for cooling data center and control method thereof - Google Patents
Combined cooling heating and power system for cooling data center and control method thereof Download PDFInfo
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- CN113623895B CN113623895B CN202110748274.9A CN202110748274A CN113623895B CN 113623895 B CN113623895 B CN 113623895B CN 202110748274 A CN202110748274 A CN 202110748274A CN 113623895 B CN113623895 B CN 113623895B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20763—Liquid cooling without phase change
- H05K7/2079—Liquid cooling without phase change within rooms for removing heat from cabinets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses a combined cooling heating and power system for cooling a data center and a control method thereof, wherein the system mainly comprises a waste heat boiler, a steam turbine unit, a condenser, a condensate pump, a shaft seal heater, a water feed pump, a cooling tower, a flue gas waste heat recovery device, a steam-water heat exchanger, a hydrophobic heat exchanger, a hot water type lithium bromide refrigerating unit, a water-water cooling heat exchanger and a data center machine room, wherein the flue gas waste heat recovery device and the steam-water heat exchanger are used for producing high-temperature hot water for driving the hot water type lithium bromide refrigerating unit to produce chilled water to supply cold for the data center machine room, and meanwhile, when the outdoor environment temperature is reduced, a natural cold source of a surface water source is also used for supplying cold for the data center machine room through the water-water cooling heat exchanger. According to the invention, the flue gas waste heat of the power plant is recovered and coupled with a natural cold source to meet the cooling demand of the data center, so that the energy efficiency level of the power plant is improved, the PUE index of the data center is deeply reduced, the construction of a green data center is effectively promoted, and the method has a wide application prospect.
Description
Technical Field
The invention belongs to the technical field of comprehensive energy, particularly relates to a combined cooling heating and power system for cooling a data center and a control method thereof, and is particularly suitable for combined cooling heating and power systems with cooling requirements of the data center.
Background
Aiming at the aspect of thermal power plants, with the strategic goals of 'carbon peak reaching and carbon neutralization' proposed by the nation, the thermal power plants face huge pressure on energy saving and carbon reduction. The thermal power plant is a large carbon emission user, and particularly, along with the continuous maturity of the domestic carbon market, the operation cost of the thermal power plant is increased sharply, however, the energy utilization efficiency of the thermal power plant is increased through waste heat resource recovery, on one hand, the carbon emission of the thermal power plant can be relatively reduced, and on the other hand, the carbon emission of the thermal power plant can be partially offset by the carbon reduction effect generated by the waste heat resource recovery. Therefore, the thermal power plant needs to develop a new energy utilization scene urgently, so that the deep recycling of waste heat resources of the thermal power plant is increased, the energy utilization efficiency of the thermal power plant is improved, and the carbon reduction pressure of the thermal power plant is relieved. In addition, the data center in China has certain gap compared with the advanced data center in Europe and America, especially the average Power Utilization Efficiency (PUE) index, although the PUE of the newly-built large-scale data center is reduced, the whole gap is larger than the average level of 1.3-2 internationally.
Aiming at the technical problems, the invention is based on the energy cascade utilization principle, effectively integrates the waste heat recovery process of the thermal power plant and the cooling process of the data center machine room so as to realize the simultaneous high-efficiency waste heat recovery and meet the cooling demand of the data center machine room, and simultaneously utilizes the natural cooling capacity of the surface water source around the power plant to supplement cooling for the data center machine room so as to further reduce the energy consumption level of the whole system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a combined cooling, heating and power system for cooling a data center and a control method thereof, wherein the combined cooling, heating and power system is reasonable in design and reliable in performance.
The technical scheme adopted by the invention for solving the problems is as follows: a combined cooling heating and power system for cooling a data center comprises a waste heat boiler, a steam turbine unit, a condenser, a condensate pump, a shaft seal heater, a water feed pump, a cooling tower, a first circulating water pump and an industrial steam user, wherein the waste heat boiler is sequentially provided with a high-pressure generator, a low-pressure generator and an economizer along the flow direction of flue gas, a high-temperature water outlet of the economizer is simultaneously connected with a high-temperature water inlet of the high-pressure generator and a high-temperature water inlet of the low-pressure generator, a second valve is arranged at the high-temperature water inlet of the high-pressure generator, a first valve is arranged at the high-temperature water inlet of the low-pressure generator, a high-pressure steam outlet of the high-pressure generator is connected with a main steam inlet of the steam turbine unit, a low-pressure steam outlet of the low-pressure generator is connected with a steam supplement inlet of the steam turbine unit, and a fourth valve is arranged at the steam supplement inlet of the steam turbine unit, the industrial steam extraction outlet of the steam turbine set is connected with an industrial steam user through an industrial steam pipeline, a third valve is installed at the industrial steam extraction outlet of the steam turbine set, a steam exhaust port of the steam turbine set is connected with a condenser, a cooling water outlet and a cooling water inlet of the condenser are respectively connected with a cooling water inlet and a cooling water outlet of a cooling tower through a first circulating water supply pipe and a first circulating water return pipe, a first circulating water pump is installed on the first circulating water return pipe, a condensed water outlet of the condenser is connected with a condensed water inlet of the condensed water pump, and a condensed water outlet of the condensed water pump is connected with a water supply inlet of a heater The system comprises a data center machine room, a cabinet set and a third circulating water pump, wherein the flue gas waste heat recovery device is arranged at the tail part of a waste heat boiler, a water supply inlet of the flue gas waste heat recovery device is connected with a water supply outlet of the water supply pump, a water supply outlet of the flue gas waste heat recovery device is simultaneously connected with a water supply inlet of an economizer and a water supply inlet of a steam-water heat exchanger, a fifth valve is arranged at the water supply inlet of the economizer, a twelfth valve is arranged at the water supply inlet of the steam-water heat exchanger, a high-temperature water outlet of the economizer is also connected with a water inlet end of a high-temperature water bypass, a thirteenth valve is arranged on the high-temperature water bypass, the water supply outlet of the steam-water heat exchanger is connected with the high-temperature water inlet of a hot water type lithium bromide refrigerating unit, a fourteenth valve is arranged at the water supply outlet of the steam-water heat exchanger, and the high-temperature water inlet of the high-temperature water type lithium bromide refrigerating unit is also connected with a water outlet end of the high-temperature water bypass, a fifteenth valve is arranged at a high-temperature water inlet of the hot water type lithium bromide refrigerating unit, a high-temperature water outlet of the hot water type lithium bromide refrigerating unit is connected with a water supply inlet of a water supply pump, a sixteenth valve is arranged at a high-temperature water outlet of the hot water type lithium bromide refrigerating unit, a low-pressure steam outlet of the low-pressure generator is also connected with a steam inlet of the steam-water heat exchanger, a sixth valve is arranged at a steam inlet of the steam-water heat exchanger, a drain outlet of the steam-water heat exchanger is connected with a drain inlet of the drain heat exchanger, a seventh valve is arranged at a drain inlet of the drain heat exchanger, a water supply outlet of the shaft seal heater is connected with a water supply inlet of the drain heat exchanger, a ninth valve is arranged at a water supply inlet of the drain heat exchanger, and a water supply outlet of the drain heat exchanger is connected with a water supply inlet of the water supply pump, a tenth valve is installed at a water supply outlet of the hydrophobic heat exchanger, a water supply bypass is arranged on a water supply side of the hydrophobic heat exchanger, an eleventh valve is installed on the water supply bypass, an eighteenth valve and a seventeenth valve are installed at a cooling water outlet and a cooling water inlet of the hot water type lithium bromide refrigerating unit respectively through a second circulating water supply pipe and a second circulating water return pipe, a filtering device and a second circulating water pump are sequentially installed on the second circulating water return pipe along the water flowing direction, the cooling water outlet and the cooling water inlet of the water-cooling heat exchanger are also connected with a ground water source through the second circulating water supply pipe and the second circulating water return pipe respectively, a twenty-fifth valve and a twenty-sixth valve are installed at the cooling water outlet and the cooling water inlet of the water-cooling heat exchanger respectively, the cooling water outlet of the hot water type lithium bromide refrigerating unit is connected with a cabinet set in a data center through a cooling water supply pipe, a twenty-fourth valve and a twenty-freezing water inlet of a refrigerating water pump are installed at a refrigerating water inlet of the hot water type lithium bromide refrigerating unit, a refrigerating water inlet of the refrigerating unit is connected with a refrigerating water cabinet set in the data center of the refrigerating machine room through a twenty-refrigerating water cooling water supply pipe, a refrigerating water inlet of the twenty-refrigerating water cooling water return pipe and a refrigerating unit, a refrigerating water inlet of the refrigerating water pump and a refrigerating machine room are connected with a refrigerating unit through a refrigerating water refrigerating machine room, the refrigerated water outlet of the water-cooling heat exchanger is connected with the cabinet in the data center machine room sequentially through a second refrigerated water bypass and a refrigerated water supply pipe, a twenty-eighth valve is installed on the second refrigerated water bypass, the refrigerated water inlet of the hot water type lithium bromide refrigerating unit is connected with the refrigerated water outlet of the water-cooling heat exchanger through a third refrigerated water bypass, and a twenty-ninth valve is installed on the third refrigerated water bypass.
Furthermore, the water-repellent heat exchanger is a direct contact heat exchanger, and steam water from the steam-water heat exchanger and boiler feed water from the shaft seal heater are subjected to mixed heat exchange in the water-repellent heat exchanger.
Further, the drain heat exchanger may also be a dividing wall type heat exchanger, and at this time, a drain outlet of the drain heat exchanger is connected to the condenser through a drain bypass, and an eighth valve is installed on the drain bypass.
Furthermore, the first chilled water bypass is arranged between a chilled water inlet of the hot water type lithium bromide refrigerating unit and a chilled water inlet of the water-water cooling heat exchanger, the second chilled water bypass is arranged between a chilled water outlet of the hot water type lithium bromide refrigerating unit and a chilled water outlet of the water-water cooling heat exchanger, and the third chilled water bypass is arranged between the chilled water inlet of the hot water type lithium bromide refrigerating unit and the chilled water outlet of the water-water cooling heat exchanger.
Further, the surface water source can be a water source such as a river, a lake and the like.
Furthermore, the cabinet group is arranged in a data center machine room and comprises N cabinets, the cabinets are formed by M layers of equipment display tables, the equipment display tables are used for storing IT equipment such as computers, servers and controllers, chilled water coils are uniformly arranged in the equipment display tables, chilled water inlets and chilled water outlets of the chilled water coils are respectively connected with a chilled water supply pipe and a chilled water return pipe, and hydraulic balance valves are respectively arranged at the chilled water inlets and the chilled water outlets of the chilled water coils.
The control method of the combined cooling heating and power system for cooling the data center comprises the following steps:
when the data center machine room needs cooling, a fifth valve and an eleventh valve are opened, boiler feed water from a shaft seal heater is driven by a feed water pump to enter a flue gas waste heat recovery device for recovering low-temperature waste heat of flue gas firstly, then enter an economizer for secondary heating to form high-temperature feed water, at the moment, the first valve, the second valve, the fourth valve, the thirteenth valve, the fifteenth valve and the sixteenth valve are opened and adjusted, part of the high-temperature feed water enters a low-pressure generator and a high-pressure generator to generate low-pressure steam and high-pressure steam respectively for the steam turbine unit to do work and generate power, the other part of the high-temperature feed water enters a hot water type lithium bromide refrigerating unit as a high-temperature driving heat source to generate chilled water, and the cooled feed water is driven by a feed water pump to enter the flue gas waste heat recovery device, so that a cycle is formed;
at the moment, a seventeenth valve and an eighteenth valve are opened, cooling water of the surface water source enters a filtering device to remove impurities in the water, the cooling water purified by the filtering device is driven by a second circulating water pump to be conveyed to a hot water type lithium bromide refrigerating unit through a second circulating water return pipe to be heated, and then the cooling water returns to the surface water source through a second circulating water supply pipe to be mixed and cooled;
at the moment, the nineteenth valve, the twentieth valve, the twenty-first valve, the twenty-second valve, the twenty-seventh valve and the hydraulic balance valve are opened and adjusted, the chilled water produced by the hot water type lithium bromide refrigerating unit enters the data center machine room under the driving of the third circulating water pump and cools the data center machine room to ensure that the data center machine room has the environment temperature required by the normal work of the IT equipment stored in the cabinet group, at the moment, the flow of the chilled water entering each chilled water coil is adjusted by adjusting the opening degree of each hydraulic balance valve to realize the hydraulic balance of a cooling system in the data center machine room, and therefore the situation that part of the IT equipment cannot normally work or is damaged due to overhigh local temperature caused by hydraulic imbalance is avoided.
When the power plant runs at low load, the low-temperature flue gas generated by the waste heat boiler is difficult to meet the high-temperature feed water flow required by the hot water type lithium bromide refrigerating unit due to insufficient waste heat, at the moment, the fifth valve and the twelfth valve are opened and adjusted, after the boiler feed water is heated for the first time by the flue gas waste heat recovery device, one part of the boiler feed water enters the economizer, the other part of the boiler feed water enters the steam-water heat exchanger, the first valve, the second valve, the thirteenth valve, the fifteenth valve and the sixteenth valve are opened and adjusted, one part of the high-temperature feed water generated by the economizer enters the low-pressure generator and the high-pressure generator, the other part of high-temperature feed water produced by the economizer enters a hot water type lithium bromide refrigerating unit to be used as a high-temperature driving heat source to produce chilled water, a fourth valve, a sixth valve, a seventh valve, a ninth valve, a tenth valve and a fourteenth valve are opened and adjusted, an eleventh valve is closed, part of low-pressure steam from a low-pressure generator is used for carrying out secondary heating on boiler feed water from a flue gas waste heat recovery device in a steam-water heat exchanger to form high-temperature feed water, and then the high-temperature feed water is conveyed to the hot water type lithium bromide refrigerating unit to supplement high-temperature water required by the high-temperature driving heat source, so that the shortage of flue gas waste heat and the low-supply high-temperature feed water amount are made up;
at this time, when the water-repellent heat exchanger is a dividing wall type heat exchanger, the eighth valve needs to be opened, and the steam after being cooled by the water-repellent heat exchanger enters the condenser through the water-repellent bypass.
When the outdoor environment temperature is reduced, the refrigeration requirement of a data center machine room can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at the moment, a nineteenth valve, a twentieth valve, a twenty-first valve, a twenty-second valve, a twenty-third valve, a twenty-fourth valve, a twenty-fifth valve, a twenty-sixth valve, a twenty-seventh valve, a twenty-ninth valve and a hydraulic balance valve are opened and adjusted, the hot water type lithium bromide refrigeration unit and a water-water cooling heat exchanger are in a series connection mode, low-temperature cooling water provided by a surface water source firstly carries out primary cooling on high-temperature chilled water from the data center machine room through the water-water cooling heat exchanger, then enters the hot water type lithium bromide refrigeration unit for secondary cooling to form chilled water meeting the requirement, enters the data center machine room under the driving of a third circulating water pump, the data center machine room is cooled, the data center machine room is ensured to have the environment temperature required by meeting the normal working of IT equipment stored in a cabinet group, at the moment, the opening degree of each hydraulic balance valve is adjusted to realize that the flow of the chilled water entering each chilled water coil, and the local balance system in the data center machine room can not be damaged by high-water, and the hydraulic balance system, so that the abnormal working temperature can be avoided.
When the outdoor environment temperature is reduced, the refrigeration requirement of a data center machine room can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at the moment, a nineteenth valve, a twentieth valve, a twenty-first valve, a twenty-second valve, a twenty-third valve, a twenty-fourth valve, a twenty-fifth valve, a twenty-sixth valve, a twenty-seventh valve, a twenty-eighth valve and a hydraulic balance valve are opened and adjusted, the hot water type lithium bromide refrigeration unit and a water-water cooling heat exchanger are connected in parallel, chilled water meeting the requirement is produced by low-temperature cooling water provided by a surface water source through the water-water cooling heat exchanger, the chilled water is mixed with the chilled water meeting the requirement produced by the hot water type lithium bromide refrigeration unit, and then the chilled water is driven by a third circulating water pump to enter the data center machine room to cool the data center machine room, so that the data center machine room is ensured to have the environment temperature required when IT equipment stored in a cabinet group normally works, and at the moment, the opening degree of each chilled water balance valve is adjusted to adjust the flow entering each chilled water coil, so that the hydraulic balance of the data center machine room can not be damaged due to realize the hydraulic balance of a cooling system, and further avoid that the IT equipment can not be damaged or the abnormal work due to cause the abnormal local high temperature.
Compared with the prior art, the invention has the following advantages and effects: (1) The invention is based on the energy cascade utilization principle, realizes the synchronization of waste heat recovery and cooling demand meeting, effectively improves the energy utilization efficiency of the thermal power plant, effectively reduces the PUE index of a data center machine room, and promotes the construction of a green data center; (2) In spring, autumn and winter, the natural cold energy of the surrounding surface water sources is used for supplying cold for the data center, so that the energy consumption level of the whole system is further reduced; (3) The PUE index of the data center can be reduced to about 1.2 by applying and analyzing a certain case, is in an international advanced level, is very in line with national energy-saving and emission-reducing policies and strategic development of future carbon neutralization, and has wide application prospect.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the system in the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a system in which the hydrophobic heat exchanger is a dividing wall type heat exchanger according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cooling system in a data center room according to an embodiment of the present invention.
In the figure: the system comprises a waste heat boiler 1, a steam turbine set 2, a condenser 3, a condensate pump 4, a shaft seal heater 5, a water feed pump 6, a cooling tower 7, a first circulating water pump 8, an industrial steam user 9, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, a fifth valve 15, a sixth valve 16, a seventh valve 17, an eighth valve 18, a ninth valve 19, a tenth valve 20, an eleventh valve 21 a twelfth valve 22, a thirteenth valve 23, a fourteenth valve 24, a fifteenth valve 25, a sixteenth valve 26, a seventeenth valve 27, an eighteenth valve 28, a nineteenth valve 29, a twentieth valve 30, a twenty-first valve 31, a twentieth valve 32, a twenty-third valve 33, a twenty-fourth valve 34, a twenty-fifth valve 35, a twenty-sixth valve 36, a twenty-seventh valve 37, a the system comprises a twenty-eighth valve 38, a twenty-ninth valve 39, a steam-water heat exchanger 40, a water-repellent heat exchanger 41, a hot water type lithium bromide refrigeration unit 42, a surface water source 43, a second circulating water pump 44, a filtering device 45, a water-water cooling heat exchanger 46, a data center machine room 47, a cabinet group 48, a third circulating water pump 49, a first circulating water supply pipe 51, a first circulating water return pipe 52, a high-temperature water bypass 53, a water supply bypass 54, a water-repellent bypass 55, a second circulating water supply pipe 56, a second circulating water return pipe 57, a chilled water supply pipe 58, a chilled water return pipe 59, a first chilled water bypass 60, a second chilled water bypass 61, a third chilled water bypass 62, a high-pressure generator 01, a low-pressure generator 02, an economizer 03, a flue gas waste heat recovery device 04, a hydraulic balance valve 480, an equipment display platform 481 and a chilled water coil 482.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in this embodiment, a combined cooling heating and power system for cooling a data center includes a waste heat boiler 1, a turbine unit 2, a condenser 3, a condensate pump 4, a shaft seal heater 5, a water feed pump 6, a cooling tower 7, a first circulating water pump 8 and an industrial steam user 9, the waste heat boiler 1 is sequentially provided with a high-pressure generator 01, a low-pressure generator 02 and an economizer 03 along a flue gas flowing direction, a high-temperature water outlet of the economizer 03 is simultaneously connected with a high-temperature water inlet of the high-pressure generator 01 and a high-temperature water inlet of the low-pressure generator 02, a second valve 12 is installed at the high-temperature water inlet of the high-pressure generator 01, a first valve 11 is installed at the high-temperature water inlet of the low-pressure generator 02, a high-pressure steam outlet of the high-pressure generator 01 is connected with a main steam inlet of the turbine unit 2, a low-pressure steam outlet of the low-pressure generator 02 is connected with a steam supply inlet of the steam turbine set 2, a fourth valve 14 is installed at the steam supply inlet of the steam turbine set 2, an industrial steam extraction outlet of the steam turbine set 2 is connected with an industrial steam user 9 through an industrial steam pipeline, a third valve 13 is installed at the industrial steam extraction outlet of the steam turbine set 2, a steam exhaust port of the steam turbine set 2 is connected with the condenser 3, a cooling water outlet and a cooling water inlet of the condenser 3 are respectively connected with a cooling water inlet and a cooling water outlet of the cooling tower 7 through a first circulating water supply pipe 51 and a first circulating water return pipe 52, a first circulating water pump 8 is installed on the first circulating water return pipe 52, a condensed water outlet of the condenser 3 is connected with a condensed water inlet of the condensed water pump 4, and a condensed water outlet of the condensed water pump 4 is connected with a water supply inlet of the shaft seal heater 5; the system further comprises a flue gas waste heat recovery device 04, a steam-water heat exchanger 40, a water-draining heat exchanger 41, a hot water type lithium bromide refrigerating unit 42, a second circulating water pump 44, a filtering device 45, a water-water cooling heat exchanger 46, a data center machine room 47, a cabinet set 48 and a third circulating water pump 49, wherein the flue gas waste heat recovery device 04 is arranged at the tail part of the waste heat boiler 1, a water supply inlet of the flue gas waste heat recovery device 04 is connected with a water supply outlet of a water supply pump 6, a water supply outlet of the flue gas waste heat recovery device 04 is simultaneously connected with a water supply inlet of the economizer 03 and a water supply inlet of the steam-water heat exchanger 40, a fifth valve 15 is arranged at the water supply inlet of the economizer 03, a twelfth valve 22 is arranged at the water supply inlet of the steam-water heat exchanger 40, a high-temperature water outlet of the economizer 03 is also connected with a water inlet end of a high-temperature water bypass 53, and a thirteenth valve 23 is arranged on the high-temperature water bypass 53, a water supply outlet of the steam-water heat exchanger 40 is connected with a high-temperature water inlet of the hot-water type lithium bromide refrigerating unit 42, a fourteenth valve 24 is installed at a water supply outlet of the steam-water heat exchanger 40, a high-temperature water inlet of the hot-water type lithium bromide refrigerating unit 42 is also connected with a water outlet end of a high-temperature water bypass 53, a fifteenth valve 25 is installed at a high-temperature water inlet of the hot-water type lithium bromide refrigerating unit 42, a high-temperature water outlet of the hot-water type lithium bromide refrigerating unit 42 is connected with a water supply inlet of the water supply pump 6, a sixteenth valve 26 is installed at a high-temperature water outlet of the hot-water type lithium bromide refrigerating unit 42, a low-pressure steam outlet of the low-pressure generator 02 is also connected with a steam inlet of the steam-water heat exchanger 40, a sixth valve 16 is installed at a steam inlet of the steam-water heat exchanger 40, a drain outlet of the steam-water heat exchanger 40 is connected with a drain inlet of the drain heat exchanger 41, and a seventh valve 17 is installed at a drain inlet of the drain heat exchanger 41, a water supply outlet of the shaft seal heater 5 is connected with a water supply inlet of the water drainage heat exchanger 41, a ninth valve 19 is installed at the water supply inlet of the water drainage heat exchanger 41, a water supply outlet of the water drainage heat exchanger 41 is connected with a water supply inlet of the water supply pump 6, a tenth valve 20 is installed at the water supply outlet of the water drainage heat exchanger 41, a water supply bypass 54 is arranged at the water supply side of the water drainage heat exchanger 41, an eleventh valve 21 is installed on the water supply bypass 54, a cooling water outlet and a cooling water inlet of the hot water type lithium bromide refrigerating unit 42 are respectively connected with a ground water source 43 through a second circulating water supply pipe 56 and a second circulating water return pipe 57, an eighteenth valve 28 and a seventeenth valve 27 are respectively installed at the cooling water outlet and the cooling water inlet of the hot water type lithium bromide refrigerating unit 42, a filtering device 45 and a second circulating water pump 44 are sequentially installed on the second circulating water return pipe 57 along the water flowing direction, a cooling water outlet and a cooling water inlet of the water-cooling heat exchanger 46 are also connected with a ground water source 43 through a second circulating water supply pipe 56 and a second circulating water return pipe 57 respectively, a twenty-fifth valve 35 and a twenty-sixth valve 36 are respectively installed at the cooling water outlet and the cooling water inlet of the water-cooling heat exchanger 46, a chilled water outlet of the hot-water type lithium bromide refrigerating unit 42 is connected with a cabinet set 48 in the data center machine room 47 through a chilled water supply pipe 58, a twentieth valve 30 is installed at the chilled water outlet of the hot-water type lithium bromide refrigerating unit 42, a third circulating water pump 49 and a twenty-first valve 31 are installed on the chilled water supply pipe 58, the chilled water inlet of the water-cooling heat exchanger 46 is connected with the cabinet set 48 in the data center machine room 47 through a chilled water return pipe 59, and a twenty-fourth valve 34 is installed at the chilled water inlet of the water-cooling heat exchanger 46, the twenty-second valve 32 is installed on the chilled water return pipe 59, a chilled water inlet of the hot water type lithium bromide refrigeration unit 42 is connected with the cabinet group 48 in the data center machine room 47 sequentially through the first chilled water bypass 60 and the chilled water return pipe 59, a twenty-seventh valve 37 is installed on the first chilled water bypass 60, a chilled water outlet of the water-water cooling heat exchanger 46 is connected with the cabinet group 48 in the data center machine room 47 sequentially through the second chilled water bypass 61 and the chilled water supply pipe 58, a twenty-eighth valve 38 is installed on the second chilled water bypass 61, the chilled water inlet of the hot water type lithium bromide refrigeration unit 42 is also connected with a chilled water outlet of the water-water cooling heat exchanger 46 through the third chilled water bypass 62, and a twenty-ninth valve 39 is installed on the third chilled water bypass 62.
In this embodiment, the first chilled water bypass 60 is disposed between the chilled water inlet of the hot water type lithium bromide refrigeration unit 42 and the chilled water inlet of the water-cooling heat exchanger 46, the second chilled water bypass 61 is disposed between the chilled water outlet of the hot water type lithium bromide refrigeration unit 42 and the chilled water outlet of the water-cooling heat exchanger 46, and the third chilled water bypass 62 is disposed between the chilled water inlet of the hot water type lithium bromide refrigeration unit 42 and the chilled water outlet of the water-cooling heat exchanger 46.
In this embodiment, the water-repellent heat exchanger 41 is a direct contact heat exchanger, and the water-repellent steam from the steam-water heat exchanger 40 and the boiler feed water from the shaft seal heater 5 perform mixed heat exchange in the water-repellent heat exchanger 41.
In this embodiment, referring to fig. 2, the heat-rejecting heat exchanger 41 may also be a dividing wall type heat exchanger, in which case, a water-rejecting outlet of the heat-rejecting heat exchanger 41 is connected to the condenser 3 through a water-rejecting bypass 55, and the eighth valve 18 is installed on the water-rejecting bypass 55.
In this embodiment, the surface water source 43 may be a river, lake, or the like.
In this embodiment, referring to fig. 3, a cabinet set 48 is disposed in a data center machine room 47, the cabinet set 48 includes N cabinets, each cabinet includes M layers of equipment display platforms 481, each equipment display platform 481 is used for storing IT equipment such as computers, servers, and controllers, chilled water coils 482 are disposed in the equipment display platforms 481, chilled water inlets and chilled water outlets of the chilled water coils 482 are connected to a chilled water supply pipe 58 and a chilled water return pipe 59, respectively, and hydraulic balance valves 480 are disposed at the chilled water inlets and chilled water outlets of the chilled water coils 482.
The control method of the combined cooling heating and power system for cooling the data center comprises the following steps:
when the data center machine room 47 needs cooling, the fifth valve 15 and the eleventh valve 21 are opened, boiler feed water from the shaft seal heater 5 is driven by the feed water pump 6 to enter the flue gas waste heat recovery device 04 for recovering flue gas low-temperature waste heat, and then enter the economizer 03 for secondary heating to form high-temperature feed water, at this time, the first valve 11, the second valve 12, the fourth valve 14, the thirteenth valve 23, the fifteenth valve 25 and the sixteenth valve 26 are opened and adjusted, part of the high-temperature feed water enters the low-pressure generator 02 and the high-pressure generator 01 to generate low-pressure steam and high-pressure steam respectively for the steam turbine unit 2 to do work and generate electricity, the other part of the high-temperature feed water enters the hot water type lithium bromide refrigeration unit 42 as a high-temperature driving heat source to generate chilled water, and the cooled feed water is driven by the feed water pump 6 to enter the flue gas waste heat recovery device 04, so that a cycle is formed;
at this time, the seventeenth valve 27 and the eighteenth valve 28 are opened, the cooling water of the surface water source 43 enters the filtering device 45 to remove impurities in the water, the cooling water purified by the filtering device 45 is driven by the second circulating water pump 44 to be conveyed to the hot water type lithium bromide refrigeration unit 42 through the second circulating water return pipe 57 to be heated, and then is returned to the surface water source 43 through the second circulating water supply pipe 56 to be mixed and cooled;
at this time, the nineteenth valve 29, the twentieth valve 30, the twenty-first valve 31, the twenty-second valve 32, the twenty-seventh valve 37 and the hydraulic balance valve 480 are opened and adjusted, the chilled water produced by the hot water type lithium bromide refrigeration unit 42 enters the data center machine room 47 under the driving of the third circulating water pump 49 to cool the data center machine room 47, so as to ensure that the data center machine room 47 has an environmental temperature required by the normal operation of the IT equipment stored in the cabinet group 48, at this time, the flow of the chilled water entering each chilled water coil 482 is adjusted by adjusting the opening degree of each hydraulic balance valve 480 to realize the hydraulic balance of a cooling system in the data center machine room 47, and thus, the problem that part of the IT equipment cannot normally operate or is damaged due to the overhigh local temperature caused by hydraulic imbalance is avoided.
When the power plant operates at low load, the low-temperature flue gas generated by the waste heat boiler 1 cannot meet the high-temperature feed water flow required by the hot water type lithium bromide refrigerating unit 42 due to insufficient waste heat, at the moment, the fifth valve 15 and the twelfth valve 22 are opened and adjusted, after the boiler feed water is heated for the first time by the flue gas waste heat recovery device 04, a part of boiler feed water enters the economizer 03, the other part of boiler feed water enters the steam-water heat exchanger 40, then the first valve 11, the second valve 12, the thirteenth valve 23, the fifteenth valve 25 and the sixteenth valve 26 are opened and adjusted, a part of high-temperature feed water generated by the economizer 03 enters the low-pressure generator 02 and the high-pressure generator 01, the other part of high-temperature feed water produced by the economizer 03 enters the hot water type lithium bromide refrigerating unit 42 to be used as a high-temperature driving heat source to produce chilled water, the fourth valve 14, the sixth valve 16, the seventh valve 17, the ninth valve 19, the tenth valve 20 and the fourteenth valve 24 are opened and adjusted, the eleventh valve 21 is closed, part of low-pressure steam from the low-pressure generator 02 is subjected to secondary heating in the steam-water heat exchanger 40 on boiler feed water from the flue gas waste heat recovery device 04 to form high-temperature feed water, and then the high-temperature feed water is conveyed to the hot water type lithium bromide refrigerating unit 42 to supplement high-temperature water required by the high-temperature driving heat source, so that the low-temperature feed water amount due to insufficient flue gas waste heat is compensated;
at this time, when the heat exchanger 41 is a dividing wall type heat exchanger, the eighth valve 18 needs to be opened, and the steam cooled by the heat exchanger 41 enters the condenser 3 through the drain bypass 55.
When the outdoor ambient temperature is reduced, the refrigeration requirement of the data center machine room 47 can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at this time, a nineteenth valve 29, a twentieth valve 30, a twenty-first valve 31, a twentieth valve 32, a thirteenth valve 33, a twenty-fourth valve 34, a twenty-fifth valve 35, a twenty-sixth valve 36, a twenty-seventh valve 37, a twenty-ninth valve 39 and a hydraulic balance valve 480 are opened and adjusted, the hot water type lithium bromide refrigeration unit 42 and the water-water cooling heat exchanger 46 are in a series connection mode, high-temperature chilled water from the data center machine room 47 is firstly subjected to primary cooling through the water-water cooling heat exchanger 46 by utilizing surface water source 43, then enters the hot water type lithium bromide refrigeration unit 42 for secondary cooling to form chilled water meeting the requirement, the chilled water enters the data center machine room 47 under the driving of the third circulating water pump 49 to cool the data center machine room 47, the data center machine room 47 is ensured to have the ambient temperature required by meeting the normal work of the IT equipment stored in the machine room 48, at this time, the problem that the hydraulic balance of imbalance of each piece of the high-water supply coil 480 is caused by adjusting the hydraulic balance of the hydraulic balance valve 480 is solved, and the high-water supply of the high-water.
When the outdoor environment temperature is reduced, the refrigeration requirement of the data center machine room 47 can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at this time, the nineteenth valve 29, the twentieth valve 30, the twenty-first valve 31, the twenty-second valve 32, the twenty-third valve 33, the twenty-fourth valve 34, the twenty-fifth valve 35, the twenty-sixth valve 36, the twenty-seventh valve 37, the twenty-eighth valve 38 and the hydraulic balance valve 480 are opened and adjusted, the hot water type lithium bromide refrigeration unit 42 and the water-water cooling heat exchanger 46 are connected in parallel, low-temperature cooling water provided by the surface water source 43 is utilized to produce required chilled water through the water-water cooling heat exchanger 46 and mix the required chilled water produced by the hot water type lithium bromide refrigeration unit 42, the mixed chilled water is driven by the third circulating water pump 49 to enter the data center machine room 47, the data center machine room 47 is cooled, the data center machine room 47 is ensured to have the environment temperature required when the IT equipment stored in the data center machine room 48 normally works, at this time, the opening degree of each hydraulic balance valve 480 is adjusted to enter the data center machine room 47, and the data center machine room is prevented from being damaged by the high-water supply temperature, and the loss caused by the loss of the high-water supply of the chilled water cooling coil 47 is avoided.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (10)
1. A combined cooling, heating and power system for cooling a data center comprises a waste heat boiler (1), a steam turbine set (2), a condenser (3), a condensate pump (4), a shaft seal heater (5), a water feed pump (6), a cooling tower (7), a first circulating water pump (8) and an industrial steam user (9), wherein the waste heat boiler (1) is sequentially provided with a high-pressure generator (01), a low-pressure generator (02) and an economizer (03) along the flow direction of flue gas, a high-temperature water outlet of the economizer (03) is simultaneously connected with a high-temperature water inlet of the high-pressure generator (01) and a high-temperature water inlet of the low-pressure generator (02), a second valve (12) is arranged at the high-temperature water inlet of the high-pressure generator (01), a first valve (11) is arranged at the high-temperature water inlet of the low-pressure generator (02), a high-pressure steam outlet of the high-pressure generator (01) is connected with a main steam inlet of the steam turbine set (2), a low-pressure steam outlet of the low-pressure generator (02) is connected with a steam inlet of the steam turbine set (2), a fourth valve (14) is arranged at a steam outlet of the steam turbine set (2), and a third valve (13) is arranged at a steam outlet of the industrial steam turbine set (9), the steam exhaust port of the steam turbine unit (2) is connected with a condenser (3), a cooling water outlet and a cooling water inlet of the condenser (3) are respectively connected with a cooling water inlet and a cooling water outlet of a cooling tower (7) through a first circulating water supply pipe (51) and a first circulating water return pipe (52), a first circulating water pump (8) is installed on the first circulating water return pipe (52), a condensed water outlet of the condenser (3) is connected with a condensed water inlet of a condensed water pump (4), a condensed water outlet of the condensed water pump (4) is connected with a water supply inlet of a shaft seal heater (5), the steam turbine unit is characterized by further comprising a flue gas waste heat recovery device (04), a steam-water heat exchanger (40), a hydrophobic heat exchanger (41), a hot water type lithium bromide refrigerating unit (42), a second circulating water pump (44), a filtering device (45), a water-water cooling heat exchanger (46), a data center machine room (47), a cabinet set (48) and a third circulating water pump (49), the flue gas waste heat recovery device (04) is arranged at the tail part of a boiler (1), the flue gas waste heat recovery device (04) is connected with a water supply inlet of a flue gas waste heat exchanger (6), and a flue gas waste water supply device (6) is connected with a flue gas waste water inlet of a flue gas waste heat recovery device (04) and a water supply inlet of a flue gas waste water inlet of a flue gas waste heat exchanger (6), a fifth valve (15) is installed at a water supply inlet of the economizer (03), a twelfth valve (22) is installed at a water supply inlet of the steam-water heat exchanger (40), a high-temperature water outlet of the economizer (03) is also connected with a water inlet end of a high-temperature water bypass (53), a thirteenth valve (23) is installed on the high-temperature water bypass (53), a water supply outlet of the steam-water heat exchanger (40) is connected with a high-temperature water inlet of a hot-water type lithium bromide refrigerating unit (42), a fourteenth valve (24) is installed at a water supply outlet of the steam-water heat exchanger (40), a high-temperature water inlet of the hot-water type lithium bromide refrigerating unit (42) is also connected with a water outlet end of the high-temperature water bypass (53), a fifteenth valve (25) is installed at a high-temperature water inlet of the hot-water type lithium bromide refrigerating unit (42), a high-temperature water outlet of the hot-water type lithium bromide refrigerating unit (42) is connected with a water supply inlet of a water pump (6), a sixteenth valve (26) is installed at a high-temperature water outlet of the hot-water type lithium bromide refrigerating unit (42), a low-pressure steam-generating heat exchanger (40) is also connected with a drain heat exchanger (41), a drain heat exchanger (17) is installed at a steam inlet of the steam-drain inlet of the steam-water heat exchanger (40), and a drain heat exchanger (17), a water supply outlet of the shaft seal heater (5) is connected with a water supply inlet of the hydrophobic heat exchanger (41), a ninth valve (19) is installed at the water supply inlet of the hydrophobic heat exchanger (41), a water supply outlet of the hydrophobic heat exchanger (41) is connected with a water supply inlet of the water supply pump (6), a tenth valve (20) is installed at the water supply outlet of the hydrophobic heat exchanger (41), a water supply bypass (54) is arranged at the water supply side of the hydrophobic heat exchanger (41), an eleventh valve (21) is installed on the water supply bypass (54), a cooling water outlet and a cooling water inlet of the hot water type lithium bromide refrigerating unit (42) are respectively connected with a surface hot water source (43) through a second circulating water supply pipe (56) and a second circulating water return pipe (57), an eighteenth valve (28) and a seventeenth valve (27) are respectively installed at the cooling water outlet and the cooling water inlet of the hot water type lithium bromide refrigerating unit (42), a filtering device (45) and a second circulating water pump (44) are sequentially installed on the second circulating water return pipe (57) along the water flowing direction, a cooling water outlet and a cooling water inlet of the second circulating water return pipe (46) are respectively connected with a twenty-surface hot water source (43), the refrigerated water outlet of the hot water type lithium bromide refrigerating unit (42) is connected with a cabinet set (48) in a data center machine room (47) through a refrigerated water supply pipe (58), a twentieth valve (30) is installed at the refrigerated water outlet of the hot water type lithium bromide refrigerating unit (42), a third circulating water pump (49) and a twenty-first valve (31) are installed on the refrigerated water supply pipe (58), a refrigerated water inlet of the water-cooling heat exchanger (46) is connected with the cabinet set (48) in the data center machine room (47) through a refrigerated water return pipe (59), a twenty-fourth valve (34) is installed at the refrigerated water inlet of the water-cooling heat exchanger (46), a twenty-second valve (32) is installed on the refrigerated water return pipe (59), the refrigerated water inlet of the hot water type lithium bromide refrigerating unit (42) is connected with the cabinet set (48) in the data center machine room (47) through a first refrigerated water bypass (60) and a refrigerated water return pipe (59), a seventh refrigerated water outlet of the refrigerated water bypass (37) is installed on the first refrigerated water bypass pipe (60), and the refrigerated water outlet of the twenty-cooling heat exchanger (46) is connected with the refrigerated water supply pipe (48) in the data center machine room (47) through the refrigerated water supply pipe (61), and the refrigerated water supply pipe (46), the chilled water inlet of the hot water type lithium bromide refrigerating unit (42) is also connected with the chilled water outlet of the water-water cooling heat exchanger (46) through a third chilled water bypass (62), and a twenty-ninth valve (39) is installed on the third chilled water bypass (62).
2. The combined cooling, heating and power system for data center cooling as claimed in claim 1, wherein the water-repellent heat exchanger (41) is a direct contact heat exchanger, and steam water from the steam-water heat exchanger (40) and boiler feed water from the shaft seal heater (5) are mixed in the water-repellent heat exchanger (41) for heat exchange.
3. The combined cooling, heating and power system for cooling of a data center according to claim 1, wherein the water-repellent heat exchanger (41) is a dividing wall type heat exchanger, in which case, a water-repellent outlet of the water-repellent heat exchanger (41) is connected to the condenser (3) through a water-repellent bypass (55), and an eighth valve (18) is installed on the water-repellent bypass (55).
4. The combined cooling, heating and power system for data center cooling as claimed in claim 1, wherein the first chilled water bypass (60) is provided between a chilled water inlet of the hot water type lithium bromide refrigerator group (42) and a chilled water inlet of the water-water cooling heat exchanger (46), the second chilled water bypass (61) is provided between a chilled water outlet of the hot water type lithium bromide refrigerator group (42) and a chilled water outlet of the water-water cooling heat exchanger (46), and the third chilled water bypass (62) is provided between a chilled water inlet of the hot water type lithium bromide refrigerator group (42) and a chilled water outlet of the water-water cooling heat exchanger (46).
5. Combined cooling, heating and power system for cooling of data centers as claimed in claim 1 characterized in that said surface water source (43) is a river or lake water source.
6. The combined cooling, heating and power system for data center cooling according to claim 1, wherein the cabinet set (48) is arranged in a data center machine room (47), the cabinet set (48) is composed of N cabinets, each cabinet is composed of M layers of equipment display platforms (481), each equipment display platform (481) is used for storing IT equipment, chilled water coils (482) are arranged in the equipment display platforms (481), chilled water inlets and chilled water outlets of the chilled water coils (482) are respectively connected with a chilled water supply pipe (58) and a chilled water return pipe (59), and hydraulic balance valves (480) are respectively arranged at chilled water inlets and chilled water outlets of the chilled water coils (482).
7. A method of controlling a combined cooling, heating and power system for cooling a data center as claimed in any one of claims 1~6 wherein the process is as follows:
when the data center machine room (47) needs cooling, a fifth valve (15) and an eleventh valve (21) are opened, boiler feed water from a shaft seal heater (5) is driven by a feed water pump (6) to firstly enter a flue gas waste heat recovery device (04) to recover low-temperature waste heat of flue gas, then enter an economizer (03) to carry out secondary heating to form high-temperature feed water, at the moment, the first valve (11), the second valve (12), the fourth valve (14), the thirteenth valve (23), the fifteenth valve (25) and the sixteenth valve (26) are opened and adjusted, part of the high-temperature feed water enters a low-pressure generator (02) and a high-pressure generator (01) to respectively generate low-pressure steam and high-pressure steam for supplying power to a steam turbine unit (2) to generate power, the other part of the high-temperature feed water enters a hot water type lithium bromide refrigerating unit (42) to serve as a high-temperature driving heat source to generate chilled water, and the cooled feed water enters the flue gas waste heat recovery device (04) through the feed water pump (6) to form a circulation;
at the moment, a seventeenth valve (27) and an eighteenth valve (28) are opened, cooling water of the surface water source (43) enters a filtering device (45) to remove impurities in the water, the cooling water purified by the filtering device (45) is driven by a second circulating water pump (44) to be conveyed to a hot water type lithium bromide refrigerating unit (42) through a second circulating water return pipe (57) to be heated, and then is returned to the surface water source (43) through a second circulating water supply pipe (56) to be mixed and cooled;
at the moment, a nineteenth valve (29), a twentieth valve (30), a twenty-first valve (31), a twentieth valve (32), a twenty-seventh valve (37) and a hydraulic balance valve (480) are opened and adjusted, chilled water produced by the hot water type lithium bromide refrigerating unit (42) enters a data center machine room (47) under the driving of a third circulating water pump (49), the data center machine room (47) is cooled, the condition that the environment temperature required by normal work of IT equipment stored in a cabinet unit (48) is met is ensured to be provided for the data center machine room (47), at the moment, the flow of the chilled water entering each chilled water coil (482) is adjusted by adjusting the opening degree of each hydraulic balance valve (480) to realize the hydraulic balance of a cooling system in the data center machine room (47), and therefore the problem that part of the IT equipment cannot work normally or is damaged due to overhigh local temperature caused by hydraulic imbalance is avoided.
8. A control method for a combined cooling, heating and power system for cooling of a data center according to claim 7, characterized in that:
when the power plant operates at low load, low-temperature flue gas generated by the waste heat boiler (1) is difficult to meet the high-temperature water supply flow required by the hot water type lithium bromide refrigerating unit (42) due to insufficient waste heat, at the moment, a fifth valve (15) and a twelfth valve (22) are opened and adjusted, after boiler water supply is heated for the first time by the flue gas waste heat recovery device (04), one part of boiler water supply enters the economizer (03), the other part of boiler water supply enters the steam-water heat exchanger (40), then the first valve (11), the second valve (12), the thirteenth valve (23), the fifteenth valve (25) and the sixteenth valve (26) are opened and adjusted, one part of high-temperature water supply generated by the economizer (03) enters the low-pressure generator (02) and the high-pressure generator (01), the other part of high-temperature feed water produced by the economizer (03) enters a hot water type lithium bromide refrigerating unit (42) to be used as a high-temperature driving heat source to produce chilled water, a fourth valve (14), a sixth valve (16), a seventh valve (17), a ninth valve (19), a tenth valve (20) and a fourteenth valve (24) are opened and adjusted, an eleventh valve (21) is closed, part of low-pressure steam from a low-pressure generator (02) is used for carrying out secondary heating on boiler feed water from a flue gas waste heat recovery device (04) in a steam-water heat exchanger (40) to form high-temperature feed water, and then the high-temperature feed water is conveyed to the hot water type lithium bromide refrigerating unit (42) to supplement the high-temperature required by the high-temperature driving heat source Water, so as to make up for the insufficient residual heat of the flue gas and the low-supply high-temperature water supply amount;
at this time, when the water-repellent heat exchanger (41) is a dividing wall type heat exchanger, the eighth valve (18) needs to be opened, and the steam after being cooled by the water-repellent heat exchanger (41) enters the condenser (3) through the water-repellent bypass (55).
9. A control method for a combined cooling, heating and power system for cooling of a data center according to claim 7, characterized in that:
when the outdoor environment temperature is reduced, the refrigeration requirement of a data center machine room (47) can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at the moment, a nineteenth valve (29), a twentieth valve (30), a twenty-first valve (31), a twentieth valve (32), a twentieth valve (33), a twenty-fourth valve (34), a twenty-fifth valve (35), a twenty-sixth valve (36), a twenty-seventh valve (37), a twenty-ninth valve (39) and a hydraulic balance valve (480) are opened and adjusted, the hot water type lithium bromide refrigeration unit (42) and the water-water cooling heat exchanger (46) are connected in series, the method comprises the steps of firstly carrying out primary cooling on high-temperature chilled water from a data center machine room (47) by utilizing low-temperature cooling water provided by an earth surface water source (43) through a water-water cooling heat exchanger (46), then entering a hot water type lithium bromide refrigerating unit (42) for secondary cooling to form chilled water meeting requirements, entering the data center machine room (47) under the driving of a third circulating water pump (49), cooling the data center machine room (47) to ensure that the data center machine room (47) has the environment temperature meeting the requirement of normal work of IT equipment stored in a cabinet unit (48), and at the moment, adjusting the flow of the chilled water entering each chilled water coil (482) by adjusting the opening degree of each hydraulic balance valve (480), the hydraulic balance of a cooling system in the data center machine room (47) is achieved, and therefore the problem that part of IT equipment cannot work normally or is damaged due to the fact that local temperature is too high due to hydraulic imbalance is avoided.
10. A control method for a combined cooling, heating and power system for cooling of a data center according to claim 7, characterized in that:
when the outdoor environment temperature is reduced, the refrigeration requirement of a data center machine room (47) can be met by adopting a mode of combining partial natural cooling and hot water type lithium bromide refrigeration, at the moment, a nineteenth valve (29), a twentieth valve (30), a twenty-first valve (31), a twentieth valve (32), a twentieth valve (33), a twenty-fourth valve (34), a twenty-fifth valve (35), a twenty-sixth valve (36), a twenty-seventh valve (37), a twenty-eighth valve (38) and a hydraulic balance valve (480) are opened and adjusted, a hot water type lithium bromide refrigeration unit (42) and a water-water cooling heat exchanger (46) are connected in parallel, low-temperature cooling water provided by a surface water source (43) is used for producing chilled water meeting the requirement through the water-water cooling heat exchanger (46) and is mixed with chilled water produced by the hot water type lithium bromide refrigeration unit (42) and then is driven into a data center (47) through a third circulating water pump (49), the data center (482) is cooled to ensure that the data center (47) has a cabinet group of data center machine rooms with normal working equipment for storing chilled water, and the chilled water temperature adjustment of the data center machine room (47) is realized through a hydraulic balance coil (480), and the opening of each chilled water supply system for adjusting the chilled water supply and adjusting the chilled water in the data center, thereby avoiding that part of the IT equipment can not work normally or is damaged due to overhigh local temperature caused by hydraulic imbalance.
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