CN113623895A - 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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- CN113623895A CN113623895A CN202110748274.9A CN202110748274A CN113623895A CN 113623895 A CN113623895 A CN 113623895A CN 202110748274 A CN202110748274 A CN 202110748274A CN 113623895 A CN113623895 A CN 113623895A
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- water
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- cooling
- heat exchanger
- data center
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- 238000001816 cooling Methods 0.000 title claims abstract description 124
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 585
- AMXOYNBUYSYVKV-UHFFFAOYSA-M Lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 166
- 239000002918 waste heat Substances 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- 238000011084 recovery Methods 0.000 claims abstract description 32
- 239000002352 surface water Substances 0.000 claims abstract description 21
- 230000002209 hydrophobic Effects 0.000 claims abstract description 5
- 239000000498 cooling water Substances 0.000 claims description 50
- 238000005057 refrigeration Methods 0.000 claims description 32
- 239000005871 repellent Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims 3
- 230000005494 condensation Effects 0.000 claims 3
- 230000001502 supplementation Effects 0.000 claims 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000005591 charge neutralization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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 produce 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 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 unit 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 unit, a steam exhaust port of the steam turbine unit 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 a condensed water pump shaft seal, and a condensed water outlet of the condensed water pump is connected with a water supply inlet of a heater The waste heat recovery device is arranged at the tail part of the waste heat boiler, a water supply inlet of the waste heat recovery device is connected with a water supply outlet of the water supply pump, a water supply outlet of the waste heat recovery device is simultaneously connected with a water supply inlet of the economizer and a water supply inlet of the 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 the 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 hot 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 the drain inlet of the drain heat exchanger, a water supply outlet of the shaft seal heater is connected with the water supply inlet of the drain heat exchanger, a ninth valve is arranged at the water supply inlet of the drain heat exchanger, a water supply outlet of the drain heat exchanger is connected with the water supply inlet of the water supply pump, and a tenth valve is arranged at the water supply outlet of the drain heat exchanger, the water supply side of the hydrophobic heat exchanger is provided with a water supply bypass, an eleventh valve is installed on the water supply bypass, a cooling water outlet and a cooling water inlet of the hot water type lithium bromide refrigerating unit are respectively connected with a ground surface water source through a second circulating water supply pipe and a second circulating water return pipe, an eighteenth valve and a seventeenth valve are respectively installed at the cooling water outlet and the cooling water inlet of the hot water type lithium bromide refrigerating unit, 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 respectively connected with the ground surface water source through the second circulating water supply pipe and the second circulating water return pipe, a twenty-fifth valve and a twenty-sixth valve are respectively installed at the cooling water outlet and the cooling water inlet of the water cooling heat exchanger, and a chilled water outlet of the hot water type lithium bromide refrigerating unit is connected with a cabinet group in a data center machine room through the chilled water supply pipe A twenty-first valve and a twenty-second valve are arranged at a chilled water outlet of the hot water type lithium bromide refrigerating unit, a third circulating water pump and the twenty-first valve are arranged on a chilled water supply pipe, a chilled water inlet of the water-water cooling heat exchanger is connected with a cabinet set in the data center machine room through a chilled water return pipe, a twenty-fourth valve is arranged at the chilled water inlet of the water-water cooling heat exchanger, a twenty-twelfth valve is arranged on the chilled water return pipe, the chilled water inlet of the hot water type lithium bromide refrigerating unit is connected with the cabinet set in the data center machine room through a first chilled water bypass and a chilled water return pipe in sequence, a twenty-seventh valve is arranged on the first chilled water bypass, the chilled water outlet of the water-water cooling heat exchanger is connected with the cabinet set in the data center machine room through a second chilled water bypass and a chilled water supply pipe in sequence, and a twenty-eighth valve is arranged on the second chilled water bypass, the chilled water inlet of the hot water type lithium bromide refrigerating unit is also connected with the chilled water outlet of the water-water cooling heat exchanger through a third chilled water bypass, and a twenty-ninth valve is installed on the third chilled 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-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-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-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 produced by the economizer enters the low-pressure generator and the high-pressure generator, the other part of the high-temperature feed water produced by the economizer enters the hot water type lithium bromide refrigerating unit as a high-temperature driving heat source to produce chilled water, and the fourth valve, the sixth valve, the seventh valve, the ninth valve, the tenth valve and the fourteenth valve are opened and adjusted, closing the eleventh valve, secondarily heating boiler feed water from a flue gas waste heat recovery device by part of low-pressure steam from the low-pressure generator in the steam-water heat exchanger to form high-temperature feed water, and then conveying the high-temperature feed water to a hot water type lithium bromide refrigerating unit to supplement high-temperature water required by a 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 water-repellent heat exchanger is a dividing wall type heat exchanger, the eighth valve needs to be opened, and steam after being cooled by the water-repellent heat exchanger is drained to the condenser through the water-repellent bypass.
When the outdoor environment temperature is reduced, the refrigeration requirement of the 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 the 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, and enters the data center machine room under the driving of a third circulating water pump, the data center machine room is cooled to ensure that the data center machine room has the environment temperature required by normal working of IT equipment stored in the cabinet group, at the moment, the flow of chilled water entering each chilled water coil is adjusted by adjusting the opening degree of each hydraulic balance valve so as to realize hydraulic balance of a cooling system in the data center machine room, and therefore the problem 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 outdoor environment temperature is reduced, the refrigeration requirement of the 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-eighth valve and a hydraulic balance valve are opened and adjusted, the hot water type lithium bromide refrigeration unit and the water-water cooling heat exchanger are connected in parallel, the chilled water meeting the requirement produced by the low-temperature cooling water provided by the surface water source is mixed with the chilled water meeting the requirement produced by the hot water type lithium bromide refrigeration unit through the water-water cooling heat exchanger, and then the mixed chilled water enters the data center machine room through the driving of a third circulating water pump to cool the data center machine room so as to ensure that the data center machine room has the environment temperature required by normal work of 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 of each hydraulic balance valve, so that the hydraulic balance of a cooling system in a data center machine room is realized, and the problem that part of IT equipment cannot work normally or is damaged due to overhigh local temperature caused by hydraulic imbalance is avoided.
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 waste heat boiler 1, the steam turbine set 2, the condenser 3, the condensate pump 4, the shaft seal heater 5, the feed water pump 6, the cooling tower 7, the first circulating water pump 8, the industrial steam user 9, the first valve 11, the second valve 12, the third valve 13, the fourth valve 14, the fifth valve 15, the sixth valve 16, the seventh valve 17, the eighth valve 18, the ninth valve 19, the tenth valve 20, the eleventh valve 21, the twelfth valve 22, the thirteenth valve 23, the fourteenth valve 24, the fifteenth valve 25, the sixteenth valve 26, the seventeenth valve 27, the eighteenth valve 28, the nineteenth valve 29, the twentieth valve 30, the twenty-first valve 31, the twenty-second valve 32, the thirteenth 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, the twenty-ninth valve 39, the twenty-ninth valve 32, the twenty-seventh valve 37, the twenty-eighth valve 38, The system comprises a steam-water heat exchanger 40, a water-repellent heat exchanger 41, a hot water type lithium bromide refrigerating 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 set 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 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, 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 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 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 steam turbine set 2, a low-pressure steam outlet of the low-pressure generator 02 is connected with a steam make-up inlet of the steam turbine set 2, a fourth valve 14 is installed at a 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 also 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 group 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 steam water 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 the present embodiment, referring to fig. 3, a cabinet group 48 is disposed in a data center machine room 47, the cabinet group 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 to recover low-temperature flue gas waste heat, then the high-temperature feed water is formed after the high-temperature feed water enters the economizer 03 for secondary heating, 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, a part of the high-temperature feed water enters the low-pressure generator 02 and the high-pressure generator 01 to respectively generate low-pressure steam and high-pressure steam, the system is used for supplying work to the turbine unit 2 for power generation, the other part of high-temperature feed water enters the hot water type lithium bromide refrigerating unit 42 to be used as a high-temperature driving heat source for producing chilled water, and the cooled feed water is driven by the water supply 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 runs at a 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, one part of the boiler feed water enters the economizer 03, the other part of the boiler feed water enters the steam-water heat exchanger 40, 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 the 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 the high-temperature feed water generated by the economizer 03 enters the hot water type lithium bromide refrigerating unit 42 as a high-temperature driving heat source to generate chilled water, and the fourth valve 14, the sixth valve 16, the fifteenth valve 25 and the sixteenth valve 26 are opened and adjusted, The seventh valve 17, the ninth valve 19, the tenth valve 20 and the fourteenth valve 24 are used for closing the eleventh valve 21, part of low-pressure steam from the low-pressure generator 02 is used for carrying out secondary heating on boiler feed water from the flue gas waste heat recovery device 04 in the 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 high-temperature water required by a high-temperature driving heat source, so that the low-temperature feed water quantity caused by 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 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 the moment, a nineteenth valve 29, a twentieth valve 30, a twenty-first valve 31, a twenty-second 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, low-temperature cooling water provided by an earth surface water source 43 firstly carries out primary cooling on high-temperature chilled water from the data center machine room 47 through the water-water cooling heat exchanger 46, then enters the hot water type lithium bromide refrigeration unit 42 for secondary cooling to form chilled water meeting the requirement, and enters the data center machine room 47 under the driving of a third circulating water pump 49, the data center machine room 47 is cooled to ensure that the data center machine room 47 has an ambient temperature required by the IT equipment stored in the cabinet group 48 during normal operation, and at the moment, the opening degree of each hydraulic balance valve 480 is adjusted to adjust the flow rate of the chilled water entering each chilled water coil 482 so as to realize hydraulic balance of a cooling system in the data center machine room 47, thereby avoiding that part of the IT equipment cannot work normally or is damaged due to overhigh local temperature caused by hydraulic imbalance.
When the outdoor environment temperature is reduced, the refrigeration requirement of the data center machine room 47 can be met by adopting a combination of 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 thirteenth valve 33, the twenty-fourth valve 34, the twenty-fifth valve 35, the twenty-sixth valve 36, 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, the chilled water meeting the requirement produced by the surface water source 43 is mixed with the chilled water meeting the requirement produced by the hot water type lithium bromide refrigeration unit 42 through the water-water cooling heat exchanger 46, and then the chilled water enters the data center machine room 47 through 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 environmental temperature required by the normal operation of the IT equipment stored in the cabinet group 48, at this time, the opening degree of each hydraulic balance valve 480 is adjusted to adjust the flow rate of the chilled water entering each chilled water coil 482 so as to realize the hydraulic balance of the cooling system in the data center machine room 47, thereby avoiding that part of the IT equipment can not work normally or is damaged due to the overhigh local temperature caused by hydraulic imbalance.
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 supplementing inlet of the steam turbine set (2), a fourth valve (14) is installed at the steam supplementing 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 condensation water outlet of the condenser (3) is connected with a condensation water inlet of the condensation water pump (4), the condensate water outlet of the condensate water pump (4) is connected with the water supply inlet of the shaft seal heater (5), and the condensate water heat recovery device is characterized by further comprising 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), the water supply inlet of the flue gas waste heat recovery device (04) is connected with the water supply outlet of the water supply pump (6), the water supply outlet of the flue gas waste heat recovery device (04) is simultaneously connected with the water supply inlet of the economizer (03) and the water supply inlet of the steam-water heat exchanger (40), and a fifth valve (15) is arranged at the 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 further 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), the 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 the water supply outlet of the steam-water heat exchanger (40), the high-temperature water inlet of the hot-water type lithium bromide refrigerating unit (42) is further connected with a water outlet end of the high-temperature water bypass (53), a fifteenth valve (25) is installed at the high-temperature water inlet of the hot-water type lithium bromide refrigerating unit (42), the high-temperature water outlet of the hot-water type lithium bromide refrigerating unit (42) is connected with the water supply inlet of the water pump (6), and a sixteenth valve (26) is installed at the high-temperature water outlet of the hot-water type lithium bromide refrigerating unit (42), the low-pressure steam outlet of the low-pressure generator (02) is also connected with a steam inlet of a steam-water heat exchanger (40), a sixth valve (16) is installed at the 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 a drain heat exchanger (41), a seventh valve (17) is installed at the drain inlet of the drain heat exchanger (41), a water supply outlet of a shaft seal heater (5) is connected with a water supply inlet of the drain heat exchanger (41), a ninth valve (19) is installed at the water supply inlet of the drain heat exchanger (41), a water supply outlet of the drain heat exchanger (41) is connected with a water supply inlet of a water supply pump (6), a tenth valve (20) is installed at the water supply outlet of the drain heat exchanger (41), and a water supply bypass (54) is arranged on the water supply side of the drain 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 on 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 respectively connected with the ground water source (43) through the second circulating water supply pipe (56) and the second circulating water return pipe (57), and a twenty-fifth valve (35) and a twenty-sixth valve (36) are respectively installed on the cooling water outlet and the cooling water inlet of the water-cooling heat exchanger (46), 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 twelfth 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 the refrigerated water return pipe (59) in sequence Connect, and install twenty-seventh valve (37) on first refrigerated water bypass (60), the refrigerated water export of water cooling heat exchanger (46) loops through second refrigerated water bypass (61) and refrigerated water delivery pipe (58) and is connected with rack group (48) in data center computer lab (47), and installs twenty-eighth valve (38) on second refrigerated water bypass (61), the refrigerated water import of hot water type lithium bromide refrigerating unit (42) still passes through third refrigerated water bypass (62) and the refrigerated water exit linkage of water cooling heat exchanger (46), and installs twenty-ninth valve (39) on third refrigerated water bypass (62).
2. The combined cooling, heating and power system for cooling of data centers as claimed in claim 1, wherein the hydrophobic heat exchanger (41) is a direct contact heat exchanger, and steam from the steam-water heat exchanger (40) is mixed with boiler feed water from the shaft seal heater (5) in the hydrophobic 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 cooling of a data center according to 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-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-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-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 control method of a combined cooling heating and power system for cooling a data center according to any one of claims 1 to 6, characterized by comprising the following steps:
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 the flue gas waste heat enters an economizer (03) to be secondarily heated 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 a steam turbine unit (2) to work and generate electricity, and the other part of the high-temperature feed water enters a hot water type lithium bromide refrigerating unit (42) to be used as a high-temperature driving heat source to generate chilled water, the cooled feed water is driven by a feed water pump (6) to enter a flue gas waste heat recovery device (04) to form a cycle;
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 twenty-second valve (32), a twenty-seventh valve (37) and a hydraulic balance valve (480) are opened and adjusted, the 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 to ensure that the data center machine room (47) has the environment temperature meeting the requirement of the IT equipment stored in the cabinet group (48) when the IT equipment works normally, the flow rate of the chilled water entering each chilled water coil (482) is adjusted by adjusting the opening degree of each hydraulic balance valve (480) so as to realize the hydraulic balance of a cooling system in the data center machine room (47), thereby avoiding that part of the IT equipment can not work normally or is damaged due to overhigh local temperature caused by hydraulic imbalance.
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) cannot 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 water supply generated by the economizer (03) enters the hot water type lithium bromide refrigerating unit (42) as a high-temperature driving heat source to produce chilled water, opening and adjusting 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), closing an eleventh valve (21), and forming high-temperature water after part of low-pressure steam from a low-pressure generator (02) secondarily heats boiler feed water from a flue gas waste heat recovery device (04) in a steam-water heat exchanger (40), and then conveying the high-temperature water to a hot water type lithium bromide refrigerating unit (42) to supplement high-temperature water required by a high-temperature driving heat source, so that the low-temperature feed water amount which is insufficient due to flue gas waste heat is compensated;
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 twenty-second 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, low-temperature cooling water provided by a surface water source (43) firstly carries out primary cooling on high-temperature chilled water from the data center machine room (47) through the water-water cooling heat exchanger (46), and then enters the hot water type lithium bromide refrigeration unit (42) for secondary cooling to form refrigeration meeting the requirement after the secondary cooling Water enters the data center machine room (47) under the driving of the third circulating water pump (49) and cools the data center machine room (47), so that the data center machine room (47) is ensured to have the environment temperature required by the IT equipment stored in the cabinet group (48) in normal operation, at the moment, the flow of chilled water entering each chilled water coil (482) is adjusted 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 realized, and the problem that part of the IT equipment cannot normally operate or is damaged due to overhigh local temperature caused by 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 twenty-second valve (32), a thirteenth valve (33), a twenty-fourth valve (34), a twenty-fifth valve (35), a twenty-sixth valve (36), a twenty-eighth valve (38) and a hydraulic balance valve (480) are opened and adjusted, the 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 utilized to produce chilled water meeting the requirement through the water-water cooling heat exchanger (46) and then the chilled water meeting the requirement produced by the hot water type lithium bromide refrigeration unit (42) is mixed, and then the cooling water enters the data center machine room (47) through the driving of a third circulating water pump (49), the data center machine room (47) is cooled, the data center machine room (47) is ensured to have the environment temperature required by the IT equipment stored in the cabinet group (48) during normal work, 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), so that the hydraulic balance of a cooling system in the data center machine room (47) is realized, and 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.
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