Energy storage type seawater desalination system for coupling utilization of waste heat of data center group and waste heat of power plant

Abstract

The invention discloses an energy storage type seawater desalination system for coupling utilization of waste heat of a data center group and waste heat of a power plant and belongs to the field of seawater desalination design. The problem that steam extraction of an existing steam turbine cannot meet the heat source requirement of a seawater desalination device is solved. The system comprises a steam turbine low-pressure cylinder, a water-cooling data center group and a seawater desalination device, and a water outlet of the steam turbine low-pressure cylinder is connected with a water inlet of the water-cooling data center group so as to realize cooling of the water-cooling data center group; the seawater desalination device is provided with a seawater storage cavity for desalinating seawater and a heat source fluid cavity for distilling seawater, the seawater storage cavity is provided with a seawater inlet and a fresh water outlet, the heat source fluid cavity is provided with a heat source side inlet and a heat source side outlet, and a water outlet of the water cooling data center group is connected with the heat source side inlet of the seawater desalination device. The seawater desalination device is driven to desalinate seawater. The device is mainly used for seawater desalination and cooling of a data center group.

Description

Technical Field

[0001] The invention relates to an energy storage type seawater desalination system which utilizes the waste heat of a data center group in coupling with the waste heat of a power plant. Background Art

[0002] With the development of artificial intelligence, the computing power requirements for data centers are increasing rapidly, which brings with it the cooling problem of high-computing data centers. The lower the operating temperature of the data center, the higher the computing efficiency. Currently, the cooling methods of large data centers include air cooling and water cooling. For example, Microsoft puts the data center on the seabed for forced circulation seawater cooling, and Huawei puts the data center in the mountains for air cooling. The above cooling solutions have problems such as low power transmission reliability and high power transmission costs, especially the high cost of corrosion-resistant materials required for seawater cooling.

[0003] On the other hand, for coastal areas, especially islands, fresh water is a very scarce resource that can be used for drinking, agricultural irrigation, and water replenishment for power plants. Current seawater desalination technologies include thermal and membrane desalination technologies. Power plants usually combine thermal desalination technology to heat the seawater in the desalination device through steam extraction from turbines. The seawater is distilled and desalinated to become drinkable fresh water. In particular, with the development of low-temperature multi-effect desalination technology, the heat source temperature of thermal desalination devices has been reduced to 50-70°C, allowing power plants to use lower-grade steam turbine extraction to drive desalination devices. However, the exhaust temperature of the steam turbine of the pure condensing unit of the power plant is around 40°C, so it is impossible to directly use the waste heat of the power plant to drive the desalination device. Summary of the invention

[0004] In view of this, the present invention provides an energy storage type seawater desalination system that couples the waste heat of a data center group with the waste heat of a power plant, which can realize cooling of the data center group and also realize seawater desalination by utilizing the waste heat of the data center group and the waste heat of the power plant.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] An energy storage type seawater desalination system that couples waste heat from a data center group with waste heat from a power plant comprises a steam turbine low-pressure cylinder, a water-cooled data center group and a seawater desalination device, wherein the water outlet of the steam turbine low-pressure cylinder is connected to the water inlet of the water-cooled data center group to achieve cooling of the water-cooled data center group; the seawater desalination device is provided with a seawater storage chamber for desalinating seawater and a heat source fluid chamber for distilling seawater, the seawater storage chamber is provided with a seawater inlet and a fresh water outlet, the heat source fluid chamber is provided with a heat source side inlet and a heat source side outlet, and the water outlet of the water-cooled data center group is connected to the heat source side inlet of the seawater desalination device to drive the seawater desalination device to desalinate seawater.

[0007] On the basis of Technical Solution 1, it also includes a regulating valve, at least one regulating valve is provided, the water-cooled data center group includes at least one data center, the at least one data center is arranged in parallel, each data center corresponds to a regulating valve, and the regulating valve is installed between the water inlet of the data center and the water outlet of the low-pressure cylinder of the turbine.

[0008] On the basis of Technical Solution 1, it also includes a generator for generating electricity, the generator is connected to the low-pressure cylinder of the steam turbine to generate electricity, and the generator is connected to the water-cooled data center group to supply power to the water-cooled data center group.

[0009] On the basis of Technical Solution 1, it also includes a condenser and a condensate pump. The condenser is provided with a heat exchange pipeline and a cooling water pipeline. The water inlet of the heat exchange pipeline is connected to the water outlet of the low-pressure cylinder of the turbine, and the water outlet of the heat exchange pipeline is connected to the water inlet of the water-cooled data center group. The condensate pump is installed on the pipeline between the condenser and the water-cooled data center group, and the water outlet of the cooling water pipeline is connected to the water inlet on the fresh water side of the seawater desalination device.

[0010] On the basis of Technical Solution 4, the heat source side outlet of the seawater desalination device is connected to the thermal circulation system of the power plant, and two branch pipelines are provided at the outlet of the condensate pump, one of which is connected to the water-cooled data center group, and the other is connected to the thermal circulation system of the power plant. An electric switching valve is provided on each of the two branch pipelines.

[0011] On the basis of Technical Solution 1, it also includes a heat storage device, which is arranged in parallel with the seawater desalination device. The heat storage device is provided with a water inlet and a water outlet. The water inlet of the heat storage device is connected to the pipeline between the water-cooled data center group and the seawater desalination device, and the water outlet of the heat storage device is connected to the heat source outlet of the seawater desalination device.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The steam turbine low-pressure cylinder, condenser, water-cooled data center group and seawater desalination device of the present invention are connected in series, which can not only realize the cooling of the water-cooled data center group and improve the efficient operation of the data center group, but also utilize the waste heat of the coupling of the steam turbine low-pressure cylinder and the water-cooled data center group to drive the low-temperature multi-effect seawater desalination device to desalinate seawater and meet the demand for fresh water. In addition, the low-grade steam generated by the steam turbine low-pressure cylinder is used to increase the temperature of the seawater as the desalination water source, so that the low-temperature multi-effect seawater desalination device has higher energy efficiency.

[0014] 2. Different data centers in the water-cooled data center group are connected in parallel, so that the cooling of each data center does not interfere with each other, and the regulating valve can achieve precise control to further improve the working efficiency of each data center. At the same time, the low-grade steam generated by the low-pressure cylinder of the steam turbine generates power and supplies power to the water-cooled data center group, which can meet the power supply and cooling of data centers with different computing power and heat dissipation requirements on-site, accurately and in real time, with the characteristics of low cost, high reliability, high stability and high efficiency; it caters to the different needs of more users and is conducive to expanding related markets.

[0015] 3. The present invention controls the heat of driving the low-temperature multi-effect seawater desalination device through a heat storage device, thereby producing fresh water according to user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated as part of this application and are used to provide a further understanding of the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the energy storage type seawater desalination system for coupling and utilizing the waste heat of a data center group and the waste heat of a power plant according to the present invention.

[0018] Explanation of the reference numerals: 1-steam turbine low-pressure cylinder; 2-water-cooled data center group; 3-seawater desalination device; 4-regulating valve; 5-generator; 6-condenser; 6-1-heat exchange pipeline; 6-2-cooling water pipeline; 7-condensate pump; 8-thermal cycle system of power plant; 9-heat storage device; 10-electric switching valve. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with specific embodiments.

[0020] Figure 1 The overall structure diagram of the energy storage type seawater desalination system for coupling the waste heat of the data center group with the waste heat of the power plant in this embodiment is shown. Figure 1 As shown, the energy storage type seawater desalination system for coupling the waste heat of the data center group and the waste heat of the power plant in this embodiment comprises a steam turbine low-pressure cylinder 1, a generator 5, a condenser 6, a condensate pump 7, a water-cooled data center group 2 and a seawater desalination device 3. Two branch pipelines are provided at the water outlet of the steam turbine low-pressure cylinder 1, one of which is connected to the generator 5 for power generation. A part of the low-grade steam generated by the steam turbine low-pressure cylinder 1 enters the generator 5 to do work to generate electricity. Although the steam turbine extracts steam of lower grade, this part of the steam still has a certain ability to do work and generate electricity, and electricity is also very scarce for islands. Therefore, the generator 5 is designed in this embodiment to convert a part of the low-grade steam generated by the steam turbine low-pressure cylinder 1 into electrical energy, a part of which is used to power the water-cooled data center group 2, and the other part of the electrical energy is used to power users, so there is no need to set up additional power supply equipment.

[0021] Another branch pipeline of the low-pressure cylinder 1 of the steam turbine is connected to the condenser 6. Another part of the low-grade steam generated by the low-pressure cylinder 1 of the steam turbine enters the condenser 6 for heat exchange to form low-temperature condensate to achieve efficient heat exchange of the water-cooled data center group. Specifically, a heat exchange pipeline 6-1 and a cooling water pipeline 6-2 are provided in the condenser 6. The water inlet of the heat exchange pipeline 6-1 is connected to the water outlet of the low-pressure cylinder 1 of the steam turbine. The water outlet of the heat exchange pipeline 6-1 is connected to the water inlet of the condensate pump 7. The water outlet of the condensate pump 7 is connected to the water inlet of the water-cooled data center group 2. Seawater is introduced into the cooling water pipeline 6-2. The low-grade steam generated by the low-pressure cylinder 1 of the steam turbine exchanges heat with the seawater in the cooling water pipeline 6-2 to form low-temperature condensate, which is then pumped into the water-cooled data center group 2 by the condensate pump 7 to cool the water-cooled data center group 2. The outlet of the cooling water pipeline 6-2 in the condenser 6 is connected to the seawater inlet of the seawater desalination device 3, and the seawater in the cooling water pipeline 6-2 is introduced through the inlet. The condenser 6 has a heat exchange function. The condenser 6 is arranged on the pipeline between the low-pressure cylinder 1 of the steam turbine and the water-cooled data center group 2. At the same time, seawater is introduced into the cooling water pipeline 6-2 in the condenser 6. The low-grade steam generated by the low-pressure cylinder 1 of the steam turbine exchanges heat with the seawater introduced into the condenser 6. The seawater after heat exchange is used as a desalinated water source and enters the seawater inlet of the low-temperature multi-effect seawater desalination device 3 through the outlet of the cooling water pipeline 6-2. The low-temperature condensed water generated by the condenser 6 is pumped into different data centers through the condensate pump 7. It can be seen that the design of the condenser 6, on the one hand, heats the seawater used as the desalinated water source through the waste heat of the power plant, so that the heat source energy required for seawater desalination distillation can be lower and have higher energy efficiency. On the other hand, the temperature of the condensed water produced by the condenser 6 is lower than the temperature of the low-grade steam produced by the low-pressure cylinder 1 of the turbine, which can improve the cooling efficiency of the water-cooled data center group 2.

[0022] The seawater desalination device 3 is provided with a seawater storage chamber for desalinating seawater and a heat source fluid chamber for distilling seawater. The seawater storage chamber is provided with a seawater inlet and a freshwater outlet. The heat source fluid chamber is provided with a heat source side inlet and a heat source side outlet. The outlet of the water-cooled data center group 2 is connected to the heat source side inlet of the seawater desalination device 3 to drive the seawater desalination device 3 to desalinate seawater. The fresh water outlet is connected to the fresh water user to provide the desalinated seawater for the fresh water user.

[0023] This embodiment uses the low-grade steam generated by the low-pressure cylinder 1 of the steam turbine to increase the temperature of the seawater used as the desalination water source, and uses the low-temperature condensed water generated by the condenser 6 to cool the water-cooled data center group 2 to achieve cooling of the water-cooled data center group 2. The low-temperature condensed water forms a high-temperature fluid after cooling the water-cooled data center group 2. The high-temperature fluid flows to the heat source fluid cavity of the seawater desalination device 3 to increase the temperature of the heat source fluid cavity of the seawater desalination device 3. The seawater desalination device 3 uses the heat source fluid cavity to distill the seawater in the seawater storage cavity to achieve desalination of the seawater. It can be seen that the series connection of the steam turbine low-pressure cylinder 1, the condenser 6, the water-cooled data center group 2 and the seawater desalination device 3 in this embodiment can not only achieve cooling of the water-cooled data center group 2 and improve the efficient operation of the data center group, but also utilizes the waste heat coupled by the steam turbine low-pressure cylinder 1 and the water-cooled data center group 2 to drive the low-temperature multi-effect seawater desalination device 3 to desalinate seawater and meet the use demand of fresh water.

[0024] This embodiment is actually a newly added seawater desalination system in the original thermal power plant thermal cycle system, wherein the steam turbine low-pressure cylinder 1, the generator 5, the condenser 6 and the condensate pump 7 are existing structures in the thermal power plant thermal cycle system, and the water-cooled data center group 2 and the seawater desalination device 3 are newly added structures in the thermal power plant thermal cycle system. Figure 1 As shown, the hot water in the heat source fluid cavity in the seawater desalination device 3 still has a certain amount of heat after the seawater distillation is realized. In this embodiment, the heat source side outlet of the heat source fluid cavity is connected to the thermal cycle system 8 of the thermal power plant thermal cycle system, so that the hot water at the heat source side outlet can be sent to the thermal cycle system 8 of the thermal power plant for use, providing additional heat recovery to improve the thermal efficiency of the cycle. In addition, two branch pipelines are provided at the outlet of the condensate pump 7, one of which is connected to the water-cooled data center group 2, and the other branch pipeline is connected to the thermal cycle system 8 of the power plant, and an electric switch valve is respectively provided on the two branch pipelines; when the condensate pump 7 is required to pump the condensate in the condenser 6 into the water-cooled data center group 2, the electric switch valve between the condensate pump 7 and the thermal cycle system 8 of the power plant is closed, and the electric switch valve between the condensate pump 7 and the water-cooled data center group 2 is opened, so that the condensate flows to the water-cooled data center group 2. When the seawater desalination system needs to be inspected and repaired, such as equipment failure or maintenance, the electric switch valve between the condensate pump 7 and the water-cooled data center group 2 is closed to isolate the newly added seawater desalination system, and the electric switch valve between the condensate pump 7 and the power plant thermal cycle system 8 is opened. The condensate at the outlet of the condensate pump 7 enters the original thermal cycle, allowing the power plant to operate in the original way to ensure power supply.

[0025] Since the water-cooled data center group 2 includes at least one data center, and the cooling requirements of each data center are different, this embodiment also provides 4 groups of regulating valves. Figure 1, the regulating valve group 4 is provided with at least one regulating valve 4, and multiple data centers are arranged in parallel, and each data center corresponds to a regulating valve 4, and the regulating valve 4 is installed between the water inlet of the data center and the water outlet of the condensate pump 7. When the condensate pump 7 flows to the water-cooled data center group 2, the cooling flow used to cool each data center can be controlled through the diversion of multiple pipelines and the control of the regulating valve 4 on each pipeline. Since the real-time computing requirements of different data centers in the water-cooled data center group 2 are different, different data centers are arranged in parallel, so that the cooling of each data center does not interfere with each other, and the regulating valve 4 can achieve precise control to further improve the work efficiency of each data center.

[0026] like Figure 1 As shown, the present embodiment further includes a heat storage device 9, which is arranged in parallel with the seawater desalination device 3. The heat storage device 9 is provided with a water inlet and a water outlet. The water inlet of the heat storage device 9 is connected to the pipeline between the water-cooled data center group 2 and the seawater desalination device 3, and the water outlet of the heat storage device 9 is connected to the heat source outlet of the seawater desalination device 3. The hot water flowing out of the water-cooled data center group 2 is divided into two paths, one of which flows into the heat storage device 9 for storage, and the other flows into the seawater desalination device 3 for distillation of seawater. The hot water stored in the heat storage device 9 can also flow out from the water inlet and flow into the seawater desalination device 3. With such a design, the heat for driving the low-temperature multi-effect seawater desalination device 3 can be controlled by controlling the flow of hot water in and out of the heat storage device 9, thereby controlling the fresh water output according to user needs.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An energy storage type seawater desalination system that utilizes the waste heat of a data center group and the waste heat of a power plant, characterized in that: It includes a steam turbine low-pressure cylinder, a water-cooled data center group and a seawater desalination device. The water outlet of the steam turbine low-pressure cylinder is connected to the water inlet of the water-cooled data center group to realize cooling of the water-cooled data center group. The seawater desalination device is provided with a seawater storage chamber for desalinating seawater and a heat source fluid chamber for seawater distillation. The seawater storage chamber is provided with a seawater inlet and a fresh water outlet, the heat source fluid chamber is provided with a heat source side inlet and a heat source side outlet, and the water outlet of the water-cooled data center group is connected to the heat source side inlet of the seawater desalination device to drive the seawater desalination device to desalinate seawater.

2. The energy storage type seawater desalination system for coupling utilization of waste heat from a data center group and waste heat from a power plant according to claim 1 is characterized in that: It also includes a regulating valve, at least one of which is provided. The water-cooled data center group includes at least one data center, and the at least one data center is arranged in parallel. Each data center corresponds to a regulating valve, and the regulating valve is installed between the water inlet of the data center and the water outlet of the low-pressure cylinder of the turbine.

3. The energy storage type seawater desalination system for coupling utilization of waste heat from data center group and waste heat from power plant according to claim 1 is characterized in that: It also includes a generator for generating electricity, the generator is connected to the low-pressure cylinder of the steam turbine to generate electricity, and the generator is connected to the water-cooled data center group to supply power to the water-cooled data center group.

4. The energy storage type seawater desalination system for coupling utilization of waste heat from a data center group and waste heat from a power plant according to claim 1 is characterized in that: It also includes a condenser and a condensate pump. The condenser is provided with a heat exchange pipeline and a cooling water pipeline. The water inlet of the heat exchange pipeline is connected to the water outlet of the low-pressure cylinder of the turbine, and the water outlet of the heat exchange pipeline is connected to the water inlet of the water-cooled data center group. The condensate pump is installed on the pipeline between the condenser and the water-cooled data center group, and the water outlet of the cooling water pipeline is connected to the water inlet on the fresh water side of the seawater desalination device.

5. The energy storage type seawater desalination system for coupling utilization of waste heat from data center group and waste heat from power plant according to claim 4 is characterized in that: The heat source side outlet of the seawater desalination device is connected to the thermal circulation system of the power plant. Two branch pipelines are provided at the outlet of the condensate pump, one of which is connected to the water-cooled data center group, and the other is connected to the thermal circulation system of the power plant. An electric switching valve is provided on each of the two branch pipelines.

6. The energy storage type seawater desalination system for coupling utilization of waste heat from a data center group and waste heat from a power plant according to claim 1 is characterized in that: It also includes a heat storage device, which is arranged in parallel with the seawater desalination device. The heat storage device is provided with a water inlet and a water outlet. The water inlet of the heat storage device is connected to the pipeline between the water-cooled data center group and the seawater desalination device, and the water outlet of the heat storage device is connected to the heat source outlet of the seawater desalination device.

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