CN113301774A - Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system - Google Patents

Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system Download PDF

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CN113301774A
CN113301774A CN202110417329.8A CN202110417329A CN113301774A CN 113301774 A CN113301774 A CN 113301774A CN 202110417329 A CN202110417329 A CN 202110417329A CN 113301774 A CN113301774 A CN 113301774A
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water
heat exchanger
lng
temperature
energy
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何为
张志恒
陈映月
冀冰心
梁世龙
孟彦龙
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Tianjin University of Commerce
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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
    • 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
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
    • H02S10/12—Hybrid wind-PV energy systems
    • 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
    • H05K7/208—Liquid cooling with phase change
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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Abstract

The invention discloses a clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system, which is characterized in that a low-temperature semiconductor thermoelectric generator is composed of an LNG-water vaporizer and a low-temperature thermoelectric module; the high-temperature semiconductor thermoelectric generator consists of a tail gas-water heat exchanger and a high-temperature thermoelectric module, and the high-temperature thermoelectric module and the low-temperature thermoelectric module are both positioned between high-temperature fluid and low-temperature fluid. The LNG power generation system comprises an LNG liquid storage tank, an LNG-water vaporizer, an LNG gas generator set, a tail gas-water heat exchanger and an absorption refrigerating unit; and the second power generation system consists of an accumulator unit, a wind power generator set and a photovoltaic generator set. One output of each of the photovoltaic unit and the accumulator unit is connected to the data center system; meanwhile, the other paths of the wind power generator set and the photovoltaic generator set are respectively connected to the accumulator unit, and the other path of the accumulator is output to the water chilling unit. The three plate heat exchangers are connected with a water inlet and outlet main pipe of a cooling water system, so that water cooling of the high-heat-flow data center server is realized.

Description

Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system
Technical Field
The invention belongs to the field of thermal energy engineering, and particularly relates to a multi-energy system device for cooling a data center and supplying power.
Background
The function of the data center is far beyond the imagination of people, and the data center is completely integrated into the corners of national economy, modern national defense, life of people and the like, wherein the cooling technology of the server becomes a research topic in the fields of electronics, energy, environmental protection and the like. As is well known, a data center belongs to a household with large energy consumption, and if clean energy is used for supplying power, the data center is an ideal requirement in the social and energy fields. Distributed hybrid energy systems based on solar energy, wind energy and liquefied natural gas (hereinafter referred to as LNG-liquefied natural gas) energy are all clean energy sources, and the distributed hybrid energy systems are used for providing required cold energy and electric energy for data centers. When the solar energy and the wind energy are sufficient for power generation, the power requirement of the water chilling unit and the total required power provided for the data center can be met. The storage battery equipped in the data center system can be used for charging and discharging when various unstable-state energy works in a combined mode, and abundant electric energy can be stored in the storage battery for standby. When the total power supply of solar energy, wind power generation and battery can't satisfy the required electric power of data center and cold energy demand, start LNG gas generating set electricity generation with the supplementary electric quantity, carry out energy supply control through control LNG flow this moment. Therefore, the invention can generate huge social benefit and economic benefit.
Disclosure of Invention
The invention aims to provide a clean and high-energy-efficiency high-heat-flux-density data center hybrid multi-energy system device which is mainly used for providing clean power for the operation of a data center system and the cooling of servers in a cabinet.
The principle and technical solution of the present invention will be described below, where LNG refers to liquefied natural gas; NG refers to natural gas. A clean energy efficient high heat flux data center hybrid multi-energy system includes: the system comprises a liquefied natural gas liquid storage tank, a low-temperature semiconductor thermoelectric generator, an LNG-water vaporizer, a high-temperature semiconductor thermoelectric generator, a tail gas-water heat exchanger, a liquefied natural gas generator, an absorption refrigerator, a water chilling unit, an accumulator unit, a wind generating set, a photovoltaic generating set, a data center system, 3 plate heat exchangers and 2 one-way valves.
The technical scheme is as follows: the low-temperature semiconductor thermoelectric generator consists of an LNG-water vaporizer and a low-temperature thermoelectric module, wherein the low-temperature thermoelectric module is positioned between an LNG channel and a water channel; the high-temperature semiconductor thermoelectric generator consists of a tail gas-water heat exchanger and a high-temperature thermoelectric module, wherein the high-temperature thermoelectric module is positioned between a high-temperature tail gas channel and a water channel. The LNG-water vaporizer, the LNG gas generator set, the tail gas-water heat exchanger and the absorption refrigerating unit are sequentially connected in series to form a first power generation system; and the second power generation system consists of an accumulator unit, a wind generating set and a photovoltaic generating set. Wherein: the wind generating set, the photovoltaic generating set and the accumulator unit are respectively provided with one path of electric energy output which is respectively connected to a power supply input unit of the data center system; meanwhile, the other paths of electric energy output of the wind generating set and the photovoltaic generating set are respectively connected to the accumulator unit for storage, and the other paths of electric energy output of the accumulator unit are connected to the power input unit of the water chilling unit.
The liquefied natural gas liquid storage tank is sequentially communicated with an LNG working medium side of the LNG-water vaporizer, a burner in the liquefied natural gas-water vaporizer, a hot fluid flow channel side of the tail gas-water heat exchanger and a heat source side of the absorption refrigerating unit, and a cooling water side of the LNG-water vaporizer is communicated with a cooling water side of the liquefied natural gas-water vaporizer, a cooling water side of the tail gas-water heat exchanger and a low-temperature water side of the first plate heat exchanger to form a closed-loop water system. And the water side of the absorption refrigerating unit is communicated with the low-temperature side in the second plate heat exchanger to form a closed-loop water system. And the refrigerant working medium side of the water chilling unit is communicated with the working medium side in the third plate heat exchanger to form a closed-loop working medium system.
And the cooling water side in the first plate heat exchanger, the cooling water side in the second plate heat exchanger and the cooling water side in the third plate heat exchanger are connected in parallel and connected to a main pipeline of a server cabinet cooling water circulation system of a system in a data center.
One path of electric energy output generated by the liquefied natural gas generator is directly connected to a power supply input unit of the data center system, and the other path of electric energy output is connected to an accumulator unit for storage. The electric energy output generated by the low-temperature semiconductor thermoelectric module and the high-temperature semiconductor thermoelectric module is directly connected to the accumulator unit for storage.
In the LNG gas power generation system, a large amount of cold energy can be released in the process of vaporizing LNG into NG (natural gas), for full recycling, a low-temperature semiconductor thermoelectric generator is arranged for cold energy thermoelectric conversion, and meanwhile, a part of cold energy can be obtained by high-temperature side fluid of the low-temperature thermoelectric generator and is directly used for cooling a data center server. After NG burns, high-temperature waste gas can be discharged, in order to fully utilize heat energy, a high-temperature semiconductor thermoelectric generator is arranged for heat energy thermoelectric conversion, after the waste gas absorbs part of energy through the high-temperature thermoelectric generator, the rest energy provides a heat source for the absorption type refrigerating unit so as to further realize heat energy recycling, and the generated refrigeration can supply cold for the data center server.
The electrical power provided by the multi-energy system is primarily used to power the data center servers and (occasionally) chiller units. The power supply sources are: the low-temperature thermoelectric conversion of cold energy is utilized in the processes of solar photovoltaic power generation, wind power generation, LNG gas generator set power generation and LNG conversion NG vaporization, and the high-temperature thermoelectric conversion of the heat energy of high-temperature waste gas discharged by the generator set is utilized. The power supply source is preferably selected from solar power generation and wind power generation, redundant power is stored in the accumulator, and the LNG generator is started when the solar power generation, the wind power generation and the accumulator cannot supply power in a summing mode.
Adopt the liquid cooling mode to data center server (CPU), the source of liquid cooling has three: recovering cold energy released in the LNG vaporization process; the generator set discharges the absorption refrigeration cooling of the waste gas residual heat; and conventional chiller units. When the LNG gas engine is started, the first two refrigeration systems are started firstly, and if the cooling demand can be met, the water chilling unit is not started; in other cases, the water chilling unit needs to be started for cooling.
Therefore, solar energy (photovoltaic power generation), wind energy, LNG energy, semiconductor temperature difference power generation technology and absorption refrigeration technology are combined to realize clean energy hybrid energy supply, provide all electric energy and cold energy required by a data center server, and finally embody the efficient utilization of system energy due to the realization of the reutilization of waste energy (the conversion of cold energy or electric energy).
The invention has the characteristics and the positive effects that:
(1) the energy is supplied by clean energy, and the energy is combined and complemented, so that the energy-saving device has high permeability of renewable energy and is green and environment-friendly. The distributed energy can be controlled independently, is not influenced by an external network, and meets the stability and guarantee requirements of power utilization and cold utilization of the data center.
(2) The heat flux density of data center servers is increasing day by day, and large-scale data centers are increasingly built in remote areas, so that solar energy and wind power resources are conveniently utilized. The effect of a water Cooling (CPU) system is the best, and the LNG fuel gas power generation system has a large amount of cold and hot waste heat energy, so that the LNG fuel gas power generation system is very suitable for being used as a distributed energy supply source for power supply and cold supply.
(3) The LNG cold energy is recovered by a low-temperature thermoelectric technology, the waste heat of the waste gas heat energy of the gas generator is utilized by a high-temperature thermoelectric technology and absorption refrigeration, the cold and heat energy of the system is fully utilized in three recovery links, and the total utilization energy consumption of the system is effectively improved.
(4) When the power supply is carried out on the power system of the data center, the priority is arranged in the order of solar photovoltaic, wind power, the storage battery and the LNG gas generator. When cooling the data center, the priority is: the energy-saving system comprises a water chilling unit powered by renewable energy and a storage battery, a direct cooling and absorption refrigerating unit for cooling based on LNG (liquefied natural gas) gas power generation, and a water chilling unit for cooling based on LNG gas power generation, and realizes a flexible energy-saving scheme for energy matching.
Drawings
Fig. 1 is a system diagram of the principles of the present invention and the connection of the components.
Wherein: the thick solid line represents the connection of the LNG fuel gas and each part of the semiconductor thermoelectric power generation system; the thin solid lines indicate the connections of the cooling water lines; the thin dashed lines indicate the connection of the multi-energy system to the data center power input unit, and to the energy storage circuit equipment.
Detailed Description
The following detailed description of the constituent aspects and the operation principles of the present invention with reference to the accompanying drawings and examples, should be pointed out that the embodiments are mainly used for explaining the technical features of the claims, and are descriptive rather than limiting, and do not limit the scope of the present invention.
A clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system comprises the following composition schemes: the low-temperature semiconductor thermoelectric generator consists of an LNG-water vaporizer and a low-temperature thermoelectric module, wherein the low-temperature thermoelectric module is positioned between an LNG channel and a water channel; the high-temperature semiconductor thermoelectric generator consists of a tail gas-water heat exchanger and a high-temperature thermoelectric module, wherein the high-temperature thermoelectric module is positioned between a high-temperature tail gas channel and a water channel. Namely: the high-temperature thermoelectric module and the low-temperature thermoelectric module are both positioned between the high-temperature fluid and the low-temperature fluid. A liquefied natural gas liquid storage tank 1, an LNG-water vaporizer 2, an liquefied natural gas generator set 3, a tail gas-water heat exchanger 4 and an absorption refrigerating unit 5 are sequentially connected in series to form a first power generation system; and a second power generation system is composed of an accumulator unit 6, a wind generating set 7 and a photovoltaic generating set 8. The LNG-water vaporizer and the tail gas-water heat exchanger both belong to a dividing wall type heat exchanger, and liquefied natural gas is arranged on one side of the LNG-water vaporizer; the other side is water. One side in the tail gas-water heat exchanger is tail gas discharged by a combustor of the liquefied natural gas generator set; the other side is water.
The wind generating set, the photovoltaic generating set and the accumulator unit are respectively provided with one path of electric energy output which is respectively connected to a power supply input unit of the data center system 9; meanwhile, the wind generating set and the photovoltaic generating set respectively have another path of electric energy output which is respectively connected to the accumulator unit for storage, and the other path of electric energy output of the accumulator unit is connected to the power input unit of the water chilling unit 10.
The liquefied natural gas liquid storage tank is sequentially communicated with a working medium side of the LNG-water vaporizer, a burner in the liquefied natural gas fuel generator set, a hot fluid flow channel side of the tail gas-water heat exchanger and a heat source side of the absorption refrigerating unit. And a cooling water side of the LNG-water vaporizer, a cooling water side of the liquefied natural gas generator set, a cooling water side of the tail gas-water heat exchanger and a low-temperature water side of the first plate heat exchanger form a closed-loop water system.
And the water side of the absorption refrigerating unit is communicated with the low-temperature side in the second plate heat exchanger to form a closed-loop water system.
And the refrigerant working medium side of the water chilling unit is communicated with the working medium side in the third plate heat exchanger to form a closed-loop working medium system.
The cooling water side of the cabinet in the first plate heat exchanger 11-1, the cooling water side of the cabinet in the second plate heat exchanger 11-2 and the cooling water side of the cabinet in the third plate heat exchanger 11-3 are connected in parallel and connected to a main pipeline of a cooling water circulation system of the server cabinet of a system in a data center.
One path of electric energy output generated by the liquefied natural gas generator is directly connected to a power supply input unit of the data center system, and the other path of electric energy output is connected to an accumulator unit for storage. The electric energy generated by the low-temperature semiconductor thermoelectric module 2-1 and the high-temperature semiconductor thermoelectric module 4-1 is directly output to an accumulator unit for storage.
A check valve 12 is arranged between the cooling water side outlet of the second plate heat exchanger and the cooling water side outlet of the first plate heat exchanger; a check valve is also arranged between the cooling water side outlet of the third plate heat exchanger and the cooling water side outlet of the second plate heat exchanger.
Introduction of a system work flow: the (solar) photovoltaic generator set and the wind generating set can directly generate electric energy when running, and can supply power to the data center after conversion. When the power of the solar receiver and the wind power generator meets the requirement, the two natural energy sources can provide all required power for the data center, and can also provide power requirement for the water chilling unit, and when the solar receiver and the wind power generator have surplus, the two natural energy sources are directly stored in the storage battery unit. The cooling of the CPU of the data center server cabinet adopts a liquid cooling mode, namely, a liquid cooling radiator is arranged on the CPU of the server substrate, and cooling liquid flows through the radiator to take away heat generated by the CPU. The data center is provided with two closed cooling liquid circulating systems inside and outside, and an external cooling water system pipeline exchanges heat with the cooling liquid system of the internal circulation through a heat exchanger, so that the safety and the stability of the cooling operation of the data center are ensured.
The storage battery unit is used for power supply when the photovoltaic generator set and the wind generating set are unstable, is mainly used for power generation amount allocation, and is used for flexible charging and discharging when various energy supplies work in a combined mode. When photovoltaic power generation, wind power generation and battery unit all can't satisfy the required power consumption demand of data center, start the electricity generation of LNG gas generating set, supply the required not enough electric quantity, carry out energy supply control through the flow of control liquefied natural gas this moment.
The principle and process of using the LNG gas generator system are as follows: the liquefied natural gas flows into the LNG-water vaporizer from the liquid storage tank, and exchanges heat with the hot fluid on the other side in the vaporizer, and at the moment, the liquefied natural gas absorbs heat in the vaporizer and is vaporized into gas. The hot fluid in the vaporizer comes from cooling water of a gas generator, LNG (liquefied natural gas) absorbs heat and is transformed into NG (natural gas), a large amount of cold energy is released, and the cooled low-temperature cooling water enters a cooling water circulation system main pipeline of a data center system. Because the low-temperature semiconductor thermoelectric module is arranged between the two fluid heat exchange walls in the LNG-water vaporizer, thermoelectric conversion is carried out by utilizing the temperature difference between hot fluid and cold fluid, namely, electric energy generated by the temperature difference is input to the accumulator unit for storage. NG flowing out of the LNG-water vaporizer enters a gas generator to be combusted and generated, generated electric energy is directly sent to a power supply input unit of a data center, and redundant electric energy is also input to an accumulator unit to be stored.
The cooling water of the LNG-water vaporizer, the LNG gas generator set and the tail gas-water heat exchanger exchanges heat with the first plate heat exchanger, the low-temperature water after heat exchange is merged into a cooling water pipeline system of the data center server,
high-temperature tail gas generated after natural gas combustion power generation enters a hot fluid channel of the tail gas-water heat exchanger, a cold fluid channel of the heat exchanger is low-temperature cooling water from the first plate heat exchanger, the high-temperature thermoelectric module performs temperature difference power generation under hot and cold fluids, and generated electric energy is directly sent to the accumulator unit.
And the medium-temperature waste gas flowing out of the hot fluid flow channel of the tail gas-water heat exchanger enters the absorption refrigerating unit to be used as a heat source of the absorption water chilling unit, the cold energy generated by the absorption water chilling unit exchanges heat with the second plate heat exchanger, and the low-temperature water after heat exchange is merged into the cooling water pipeline system of the data center server.
When the absorption refrigerating unit can not meet the requirement of the cooling capacity required by the cooling of the data center, the cold water unit supplements the cooling capacity, and the electric energy required by the cold water unit is directly provided by the storage battery unit. Cold energy generated by the water chilling unit exchanges heat with the third plate heat exchanger, and low-temperature water after heat exchange is merged into a cooling water pipeline system of the data center server to provide a cold source for the CPU.
The three cold supply modes provide cold sources for the data center liquid cooling system, and the cooling water side of the three plate heat exchangers is connected with the water inlet and return main pipe of the server cooling water pipeline system, so that the water cooling of the high-heat-flow data center server is realized. The purpose of cooling and supplying power to the data center with the least energy consumption is achieved through cascade utilization of LNG cold and heat energy.
In order to ensure that the cooling water at the outlets of the first plate heat exchanger and the second plate heat exchanger circulates in a single direction, the water inlet return main pipe of the cooling water system is respectively provided with two one-way valves, so that the water outlet of the three heat exchangers connected in parallel is not influenced. The first check valve is arranged between the second plate heat exchanger and the outlet of the first plate heat exchanger; the second check valve is arranged between the outlet of the third plate heat exchanger and the outlet of the second plate heat exchanger.
According to the cold load demand of data center power consumption, solar energy, wind energy are the priority to be started, when the unsatisfied demand of energy supply, restart LNG gas generator. After the gas generator is started, the low-temperature semiconductor thermoelectric generator, the high-temperature semiconductor thermoelectric generator and the absorption type refrigerating device are started in priority to meet the cooling demand, and when the cooling is not met, the water chilling unit is started finally. The multifunctional flexible complementation and the high-efficiency utilization are realized.

Claims (3)

1. Clean high energy efficiency's high heat flux density data center hybrid multi-energy system includes: a liquefied natural gas liquid storage tank, a low-temperature semiconductor thermoelectric generator, an LNG-water vaporizer, a low-temperature thermoelectric module, a high-temperature semiconductor thermoelectric generator, a tail gas-water heat exchanger, a high-temperature thermoelectric module, a liquefied natural gas generator, an absorption refrigerator, a water chilling unit, an accumulator unit, a wind generating set, a photovoltaic generating set, a data center system, 3 plate heat exchangers and 2 one-way valves,
the method is characterized in that: the LNG-water vaporizer and the low-temperature thermoelectric module jointly form a low-temperature semiconductor thermoelectric generator, and the low-temperature thermoelectric module is positioned between the LNG channel and the water channel; the high-temperature semiconductor thermoelectric generator is formed by a tail gas-water heat exchanger and a high-temperature thermoelectric module, the high-temperature thermoelectric module is positioned between a high-temperature tail gas channel and a water channel, and a first power generation system is formed by sequentially connecting a liquefied natural gas liquid storage tank (1), an LNG-water vaporizer (2), an liquefied natural gas power generator set (3), a tail gas-water heat exchanger (4) and an absorption refrigerating unit (5) in series; constitute second power generation system by accumulator unit (6), wind generating set (7) and photovoltaic generating set (8), wherein: the wind generating set, the photovoltaic generating set and the accumulator unit are respectively provided with one path of electric energy output which is respectively connected to a power supply input unit of the data center system (9); meanwhile, the other paths of electric energy output of the wind generating set and the photovoltaic generating set are respectively connected to an accumulator unit for storage, the other paths of electric energy output of the accumulator unit are connected to a power supply input unit of a water chilling unit (10), an LNG working medium side of an LNG-water vaporizer, a burner in the LNG gas generating set, a hot fluid flow passage side of the LNG-water vaporizer and a heat source side of an absorption refrigerating unit are sequentially communicated, and a cooling water side of the LNG-water vaporizer is communicated with a cooling water side in the LNG gas generating set, a cooling water side of a tail gas-water heat exchanger and a low-temperature water side in a first plate heat exchanger to form a closed-loop water system; the water side of the absorption refrigerating unit is communicated with the low-temperature side in the second plate heat exchanger to form a closed-loop water system; the refrigerant working medium side of the water chilling unit is communicated with the working medium side of the third plate heat exchanger to form a closed-loop working medium system, the cabinet cooling water side of the first plate heat exchanger (11-1), the cabinet cooling water side of the second plate heat exchanger (11-2) and the cabinet cooling water side of the third plate heat exchanger (11-3) are connected in parallel, the three paths of the cabinet cooling water systems are connected to a main pipeline of a server cabinet cooling water circulation system in a data center, one path of the three paths of.
2. The clean energy efficient high heat flux data center hybrid multi-energy system of claim 1, wherein: a check valve (12) is arranged between the outlet at the cooling water side of the second plate heat exchanger and the outlet at the cooling water side of the first plate heat exchanger; a check valve is also arranged between the cooling water side outlet of the third plate heat exchanger and the cooling water side outlet of the second plate heat exchanger.
3. The clean energy efficient high heat flux data center hybrid multi-energy system of claim 1, wherein: the LNG-water vaporizer and the tail gas-water heat exchanger both belong to a dividing wall type heat exchanger, one side of the LNG-water vaporizer is liquefied natural gas, and the other side of the LNG-water vaporizer is water; one side of the tail gas-water heat exchanger is tail gas discharged by the combustor of the liquefied natural gas generator set, and the other side of the tail gas-water heat exchanger is water.
CN202110417329.8A 2021-04-19 2021-04-19 Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system Pending CN113301774A (en)

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