Renewable energy and waste heat comprehensive utilization system and method for data center

Abstract

The present invention discloses a system and method for comprehensive utilization of renewable energy and waste heat for a data center, and relates to the technical field of comprehensive utilization of renewable energy and waste heat, including a data center, a water reservoir, a water circulation system and a refrigerant circulation system, wherein the water reservoir is used to: complete a heat storage process using the heat of the data center within a set first cycle, and to supply a heat release process using the heat stored in the heat storage process within a set second cycle; the water circulation system is provided with a plurality of water circulation loops; and the refrigerant circulation system is provided with a plurality of circulation systems; wherein the heat storage process and the heat release process are realized by the cooperation of a plurality of water circulation loops and / or a plurality of circulation systems. The present invention can effectively reduce the user's heating cost in winter, reduce the burning of fossil fuels, the generation of carbon dioxide, and the PUE value of the data center, and has important economic and environmental value.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy and waste heat comprehensive utilization, and in particular to a renewable energy and waste heat comprehensive utilization system and method for a data center. Background Art

[0002] During operation, the servers in the data center will release a large amount of medium and low-grade waste heat. This waste heat is easy to extract, has stable heat generation and high heat capacity. It is a high-quality heat source that can be used to heat domestic water, provide heating, or meet other heat needs. There are about 80,000 data centers in my country. Based on the scale of existing data centers, the total amount of recoverable waste heat from data centers in northern my country is about 10GW, which can theoretically support the heating of 300 million square meters of buildings. Recycling waste heat from data centers for regional heating has broad market prospects and energy-saving significance in northern my country.

[0003] However, at present, most of the waste heat from data centers is directly discharged into the atmosphere, which is a huge waste. At present, there are only a few companies that have applied waste heat recovery systems, such as Alibaba Qiandao Lake Data Center, Tencent Tianjin Data Center, and China Telecom Chongqing Cloud Computing Base. The key energy-saving links in my country's data center industry are air-conditioning systems and IT systems, and waste heat recovery is often overlooked. With the rapid growth in the scale and number of data center construction, the government's requirements for data center energy conservation are also getting higher and higher.

[0004] On the other hand, my country is rich in renewable energy resources, and the contribution of deep development of renewable energy also has broad development prospects in the fields of data center energy conservation and regional cooling and heating. Obviously, the comprehensive utilization of renewable energy and waste heat has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a system and method for comprehensive utilization of renewable energy and waste heat for data centers. In non-winter season, the waste heat generated by the data center is stored in a large water reservoir through multi-temperature zone continuous heat collection technology. During the whole process, the large water reservoir serves as a cross-season cold source for direct supply to the data center, the condensing end of the refrigeration unit, and the heat recovery end of the refrigeration unit, and is finally assisted by a solar collector to heat the temperature to the target heating temperature. In winter, the waste heat from the data center, solar energy, and heat from the large water reservoir are respectively collected through high-efficiency heat pump technology, solar thermal technology, and multi-temperature zone continuous heat release technology to achieve cross-seasonal low-carbon heating in cold areas. The system operates stably throughout the year, over and over again, which can effectively reduce users' winter heating costs, reduce the combustion of fossil fuels, the generation of carbon dioxide, and the PUE value of data centers, and has important economic and environmental value.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A renewable energy and waste heat comprehensive utilization system, comprising:

[0008] Data centers;

[0009] A water storage tank, which is used to: use the heat of the data center to complete a heat storage process within a set first period, and use the heat stored in the heat storage process to supply a heat release process within a set second period;

[0010] A water circulation system, which is provided with a plurality of water circulation loops; and

[0011] A refrigerant circulation system is provided with several circulation systems; wherein,

[0012] The heat storage process and the heat release process are realized by the cooperation of several water circulation loops and / or several circulation systems.

[0013] The renewable energy and waste heat comprehensive utilization system as described above, further, the water circulation system comprises:

[0014] A first water circulation loop, comprising: a No. 1 plate heat exchanger, a water reservoir, a cooling tower, and a No. 1 heat pump evaporator, wherein one end of the No. 1 plate heat exchanger is respectively connected to the water reservoir, the cooling tower, and the No. 1 heat pump evaporator;

[0015] The second water circulation loop comprises: a condensing end of the refrigeration unit, a water reservoir, and a cooling tower, wherein one end of the condensing end of the refrigeration unit is connected to the water reservoir and the cooling tower respectively;

[0016] A third water circulation loop, comprising: a heat recovery end of the refrigeration unit and a water reservoir, wherein the heat recovery end of the refrigeration unit is in communication with the water reservoir;

[0017] A fourth water circulation loop, comprising: a data center, a No. 1 plate heat exchanger and a refrigeration unit evaporator, wherein the cooling water supply / return interface of the data center is respectively connected to the No. 1 plate heat exchanger and the refrigeration unit evaporator;

[0018] A fifth water circulation loop, comprising: a solar thermal collector, a water reservoir, and a buffer water tank, wherein the solar thermal collector is connected to the large water reservoir and the buffer water tank respectively; and

[0019] The sixth water circulation loop includes: a buffer water tank, a solar thermal collector, a No. 1 heat pump condenser, a No. 2 heat pump condenser, and a No. 2 plate heat exchanger, wherein the buffer water tank is respectively connected to the large water reservoir, the solar thermal collector, the No. 1 heat pump condenser, the No. 2 heat pump condenser, and the No. 2 plate heat exchanger.

[0020] The renewable energy and waste heat comprehensive utilization system as described above, further, the refrigerant circulation system comprises:

[0021] A refrigeration unit circulation system, comprising a refrigeration unit evaporator, a compressor, a refrigeration unit heat recovery end, a refrigeration unit condensation end and a throttling device, wherein the refrigeration unit evaporator constitutes one end of the heat exchange process, the refrigeration unit heat recovery end and the refrigeration unit condensation end constitute the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process;

[0022] A heat pump circulation system No. 1, comprising a heat pump evaporator No. 1, a compressor, a heat pump condenser No. 1 and a throttling device, wherein the heat pump evaporator No. 1 constitutes one end of the heat exchange process, the heat pump condenser No. 1 constitutes the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process; and,

[0023] The No. 2 heat pump circulation system includes a No. 2 heat pump evaporator, a compressor, a No. 2 heat pump condenser and a throttling device, wherein the No. 2 heat pump evaporator constitutes one end of the heat exchange process, the No. 2 heat pump condenser constitutes the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process.

[0024] As described above, the renewable energy and waste heat comprehensive utilization system, further, the top layer of the water tank is hot water and the bottom layer is cold water, wherein, when the outlet water is hot water and the return water is cold water, the water tank adopts the top outlet and bottom return water mode for water circulation, and when the outlet water is cold water and the return water is hot water, the water tank adopts the bottom outlet and top return water mode for water circulation.

[0025] In the renewable energy and waste heat comprehensive utilization system as described above, further, a thermal insulation layer is provided on the top and around the water storage tank.

[0026] As described above, the renewable energy and waste heat comprehensive utilization system, further, the heat source of the No. 2 heat pump evaporator includes a water source from a water reservoir or an air source, wherein when the water pump drives the water circulation loop, the water source from the water reservoir is used as the heat source, and when the water circulation loop is closed, the fan of the No. 2 heat pump evaporator is driven, and at this time the air source is used as the heat source.

[0027] The renewable energy and waste heat comprehensive utilization system as described above, further, the first cycle includes spring, summer and autumn, and the second cycle includes winter.

[0028] As described above, the renewable energy and waste heat comprehensive utilization system, further, the heat storage process is a process in which 0°C water with a certain ice content is heated to 90°C water; the heat release process is a process in which 90°C water is cooled to 0°C water with a certain ice content.

[0029] A renewable energy and waste heat comprehensive utilization operation method, which uses the renewable energy and waste heat comprehensive utilization system as described above,

[0030] The heat storage process includes:

[0031] The first heat storage stage is used when the water temperature of the water storage tank is in the first heat storage temperature range. The process includes: starting the water circulation loop composed of the water storage tank and the No. 1 plate heat exchanger and starting the refrigeration unit circulation system, while other water circulation loops and refrigerant circulation systems are closed, and the water storage tank directly provides cooling for the data center;

[0032] The second heat storage stage is used when the water temperature of the water storage tank is in the second heat storage temperature range. The process includes: opening the water circulation loop composed of the water storage tank and the condensing end of the refrigeration unit and opening the circulation system of the refrigeration unit, and closing other water circulation loops and refrigerant circulation systems, and the water storage tank provides coldness for the condensing end of the refrigeration unit;

[0033] The third heat storage stage is used when the water temperature of the water reservoir is in the third heat storage temperature range. The process includes: opening the water circulation loop composed of the water reservoir and the heat recovery end of the refrigeration unit, opening the water circulation loop composed of the solar collector and the buffer water tank, and opening the circulation system of the refrigeration unit. Other water circulation loops and refrigerant circulation systems are closed. The water reservoir provides coldness for the heat recovery end of the refrigeration unit, and the solar collector stores heat for the buffer water tank. When the buffer water tank temperature rises to the first set temperature, the hot and cold water are replaced with the top water layer of the water reservoir, and the cycle is repeated;

[0034] The fourth heat storage stage is used when the water temperature of the water reservoir is in the fourth heat storage temperature range, and the process includes: opening the water circulation loop composed of the water reservoir and the solar thermal collector, closing other water circulation loops and the refrigerant circulation system, and the solar thermal collector provides reserve heat for the water reservoir;

[0035] The exothermic process comprises:

[0036] The first heat release stage is used when the water temperature of the water storage tank is in the first heat release temperature range. The process includes: the water circulation loop composed of the water storage tank and the buffer water tank is opened, the water circulation loop composed of the buffer water tank and the second plate heat exchanger is opened, and other water circulation loops and refrigerant circulation systems are closed.

[0037] The second heat release stage is used when the water temperature of the water reservoir is in the second heat release temperature range, and its process includes: at this time, the water circulation loop composed of the data center's supply / return water and No. 1 plate heat exchanger is turned on, the water circulation loop composed of No. 1 plate heat exchanger and No. 1 heat pump evaporator is turned on, the water circulation loop composed of No. 1 heat pump condenser and buffer water tank is turned on, the No. 1 heat pump circulation system is turned on, the water circulation loop composed of the buffer water tank and No. 1 heat pump condenser is turned on, the water circulation loop composed of the solar collector and the buffer water tank is turned on, the water circulation loop composed of the water reservoir and No. 2 heat pump evaporator is turned on, the water circulation loop composed of No. 2 heat pump condenser and buffer water tank is turned on, the No. 2 heat pump circulation system is turned on, the water circulation loop composed of the buffer water tank and No. 2 plate heat exchanger is turned on, and other water circulation loops and refrigerant circulation loops are closed.

[0038] As described above, the renewable energy and waste heat comprehensive utilization operation method, further, the first heat storage stage is a temperature of 0 to 20°C; the second heat storage stage is a temperature of 21 to 37°C; the third heat storage stage is a temperature of 38 to 60°C; the fourth heat storage stage is a temperature of 61 to 90°C; the first heat release temperature range is a water temperature of 37 to 90°C; the second heat release stage is a water temperature of 0 to 37°C.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The renewable energy and waste heat comprehensive utilization system for data centers proposed in the present invention realizes a cross-seasonal energy supply mode of storing cold in winter and supplying it in summer, and supplying heat in winter and storing it in summer through cross-seasonal cold and heat storage technology, thus solving the problem of seasonal discontinuity and volatility of renewable energy.

[0041] 2. The renewable energy and waste heat comprehensive utilization system for data centers proposed in the present invention has broad market prospects and energy-saving significance in northern my country. The large-scale reuse of waste heat from data centers can not only help users reduce heating costs, but also indirectly reduce carbon dioxide generated by the use of fossil fuels, which has important economic and environmental value.

[0042] 3. The renewable energy and waste heat comprehensive utilization system for data centers proposed in the present invention uses a cross-seasonal water reservoir to directly provide cooling for the data center, reducing the power consumption of refrigeration equipment in the total power consumption of the data center, thereby effectively reducing the PUE value, which is beneficial to the data center to enhance its brand value and guide the data center to take a green development path of high efficiency, low carbon, intensive and circular. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is a structural schematic diagram of a renewable energy and waste heat comprehensive utilization system for a data center according to an embodiment of the present invention.

[0045] Explanation of the reference numerals: 1. Large water reservoir; 2. Plate heat exchanger No. 1; 3. Condensation end of refrigeration unit; 4. Heat recovery end of refrigeration unit; 5. Evaporator of refrigeration unit; 6. Cooling tower; 7. Solar collector; 8. Buffer water tank; 9. Heat pump evaporator No. 1; 10. Heat pump condenser No. 1; 11. Heat pump evaporator No. 2; 12. Heat pump condenser No. 2; 13. Plate heat exchanger No. 2; 14. First water pump; 15. Second water pump; 16. Third water pump; 17. Fourth water pump; 18. Fifth water pump; 19. Sixth water pump; 20. Seventh water pump; 21. the eighth water pump; 22. the ninth water pump; 23. the first stop valve; 24. the second stop valve; 25. the third stop valve; 26. the fourth stop valve; 27. the fifth stop valve; 28. the sixth stop valve; 29. ​​the seventh stop valve; 30. the eighth stop valve; 31. the ninth stop valve; 32. the tenth stop valve; 33. the eleventh stop valve; 34. the twelfth stop valve; 35. the first compressor; 36. the second compressor; 37. the third compressor; 38. the first throttling device; 39. the second throttling device; 40. the third throttling device. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Example:

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of the embodiments of the present invention are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly defined. In addition, unless otherwise clearly defined and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] See also Figure 1 , Figure 1 It is a structural schematic diagram of a renewable energy and waste heat comprehensive utilization system for a data center according to an embodiment of the present invention.

[0052] The present invention provides a system and method for comprehensive utilization of renewable energy and waste heat for a data center. In non-winter season, the waste heat generated by the data center is stored in a large water reservoir through multi-temperature zone continuous heat collection technology. During the whole process, the large water reservoir is successively used as a cross-season cold source for direct supply to the data center, the condensing end of the refrigeration unit, and the heat recovery end of the refrigeration unit, and is finally assisted by a solar collector to heat the temperature to a target heating temperature. In winter, the waste heat from the data center, solar energy, and heat from the large water reservoir are respectively used through high-efficiency heat pump technology, solar thermal technology, and multi-temperature zone continuous heat release technology to achieve cross-seasonal low-carbon heating in cold areas. The system operates stably throughout the year, over and over again, which can effectively reduce users' winter heating costs, reduce the combustion of fossil fuels, the generation of carbon dioxide, and the PUE value of data centers, and has important economic and environmental value.

[0053] like Figure 1 As shown, in an embodiment of the present invention, the renewable energy and waste heat comprehensive utilization system for a data center includes a large water reservoir 1, a No. 1 plate heat exchanger 2, a refrigeration unit condensing end 3, a refrigeration unit heat recovery end 4, a refrigeration unit evaporator 5, a cooling tower 6, a solar collector 7, a buffer water tank 8, a No. 1 heat pump evaporator 9, a No. 1 heat pump condenser 10, a No. 2 heat pump evaporator 11, a No. 2 heat pump condenser 12, a No. 2 plate heat exchanger 13, a plurality of water pumps (a first water pump 14 to a ninth water pump 22), a plurality of stop valves (a first stop valve 23 to a twelfth stop valve 34), a compressor (a first compressor 35 to a third compressor 37), and a throttling device (a first throttling device 38 to a third throttling device 40). The renewable energy and waste heat comprehensive utilization system for the data center includes a water circulation system and a refrigerant circulation system. The water circulation system and the refrigerant circulation system perform heat exchange through heat exchangers such as a No. 1 plate heat exchanger 2, a refrigeration unit condensing end 3, a refrigeration unit heat recovery end 4, a refrigeration unit evaporator 5, a No. 1 heat pump evaporator 9, a No. 1 heat pump condenser 10, a No. 2 heat pump evaporator 11, and a No. 2 heat pump condenser 12.

[0054] The large water reservoir 1 serves as the core device of the entire system. When it is working normally, it is filled with water and is required to form an independent water circulation loop with the No. 1 plate heat exchanger 2, the condensing end 3 of the refrigeration unit, the heat recovery end 4 of the refrigeration unit, the solar collector 7, the buffer water tank 8, and the No. 2 heat pump evaporator 11. Insulation materials are provided around and on the top of the large water reservoir 1, which are not shown in the figure. The large water reservoir 1 uses a layered design concept of hot water top layer distribution and cold water bottom layer distribution to arrange the water outlet mode of the water circulation loop. When the outlet water is hot water and the return water is cold water, the top outlet and top return water mode are preferably used for water circulation. When the outlet water is cold water and the return water is hot water, the bottom outlet and top return water mode are preferably used for water circulation.

[0055] The water circulation loop mainly includes: the No. 1 plate heat exchanger 2 forms an independent water circulation loop with the large water reservoir 1, the cooling tower 6, and the No. 1 heat pump evaporator 9 respectively; the condensing end 3 of the refrigeration unit forms an independent water circulation loop with the large water reservoir 1 and the cooling tower 6 respectively; the heat recovery end 4 of the refrigeration unit forms an independent water circulation loop only with the large water reservoir 1; the cooling water supply / return interface of the data center forms an independent water circulation loop with the No. 1 plate heat exchanger 2 and the refrigeration unit evaporator 5 respectively; the solar collector 7 forms an independent water circulation loop with the large water reservoir 1 and the buffer water tank 8 respectively; the buffer water tank 8 forms an independent water circulation loop with the large water reservoir 1, the solar collector 7, the No. 1 heat pump condenser 10, the No. 2 heat pump condenser 12, and the No. 2 plate heat exchanger 13 respectively.

[0056] The refrigerant circulation system includes: a refrigeration unit circulation system, a No. 1 heat pump circulation system and a No. 2 heat pump circulation system. The refrigerant circulation system is mainly composed of a refrigeration unit evaporator 5, a first compressor 35, a refrigeration unit heat recovery end 4, a refrigeration unit condensation end, and a first throttling device 38; the No. 1 heat pump circulation system is mainly composed of a No. 1 heat pump evaporator 9, a second compressor 36, a No. 1 heat pump condenser 10, and a second throttling device 39; the No. 2 heat pump circulation system is mainly composed of a No. 2 heat pump evaporator 11, a third compressor 37, a No. 2 heat pump condenser 12, and a third throttling device 40. The heat source of the No. 2 heat pump evaporator 11 can be a water source from a large water reservoir 1 or an air source. When the sixth water pump 19 drives the water circulation loop, the water source of the large water reservoir 1 is used as a heat source. When the water circulation loop is closed, the fan of the No. 2 heat pump evaporator 11 is driven, and the air source is used as a heat source.

[0057] The water pumps (the first water pump 14 to the ninth water pump 22) and the stop valves (the first stop valve 23 to the twelfth stop valve 34) can be freely switched between the various operating modes according to actual needs.

[0058] Based on the above system, the present invention also proposes an operation method of a renewable energy and waste heat comprehensive utilization system for a data center, which revolves around the heat storage process and heat release process of a large water reservoir 1 to achieve cross-seasonal regional cooling and heating.

[0059] The heat storage process is also called the cooling process. It requires the waste heat utilization system to achieve a temperature change of the large water storage tank from 0°C to 90°C in spring, summer and autumn. When the temperature of the large water storage tank 1 is 0°C, the corresponding ice content is about 40%. The specific implementation process is as follows:

[0060] (1) When the temperature of large water reservoir 1 is between 0 and 20°C, the large water reservoir enters direct cooling mode. At this time, the water circulation loop composed of large water reservoir 1 and plate heat exchanger 2 is turned on, and other water circulation loops and refrigerant circulation loops are closed. Large water reservoir 1 directly provides cooling capacity for the cooling water loop of the data center.

[0061] (2) When the temperature of the large water reservoir 1 is between 21 and 37°C, the large water reservoir-condensing end cooling mode is entered. At this time, the refrigeration unit circulation system loop is turned on (refrigeration unit condensing end 3, refrigeration unit heat recovery end 4, refrigeration unit evaporator 5, first compressor 35, first throttling device 38), the water circulation loop composed of the large water reservoir 1 and the refrigeration unit condensing end 3 is turned on, and other water circulation loops and refrigerant circulation loops are closed, and the large water reservoir 1 provides cooling for the refrigeration unit condensing end 3.

[0062] (3) When the temperature of the large water reservoir 1 is 38-60°C, the large water reservoir-heat recovery end cooling mode is entered. At this time, the circulation loop of the refrigeration unit system is turned on (refrigeration unit condensing end 3, refrigeration unit heat recovery end 4, refrigeration unit evaporator 5, first compressor 35, first throttling device 38), the water circulation loop composed of the large water reservoir 1 and the refrigeration unit heat recovery end 4 is turned on, the water circulation loop composed of the solar collector 7 and the buffer water tank 8 is turned on, and other water circulation loops and refrigerant circulation loops are closed. The large water reservoir 1 provides cooling for the refrigeration unit heat recovery end 4, and the solar collector 7 stores heat for the buffer water tank 8. When the buffer water tank temperature rises to 90°C, the hot and cold water are replaced between the top water layer of the large water reservoir 1, and the cycle is repeated.

[0063] (4) When the temperature of the large water reservoir 1 is between 61 and 90°C, the large water reservoir-collector mode is entered, the water circulation loop consisting of the large water reservoir 1 and the solar collector 7 is turned on, and other water circulation loops and refrigerant circulation loops are turned off, and the solar collector 7 provides reserve heat for the large water reservoir 1. It is required that the water temperature of the large water reservoir 1 reaches about 90°C from the beginning of spring to the end of autumn.

[0064] The heat release process is also called the cold storage process, which requires the waste heat utilization system to achieve a change in the temperature of the large water storage tank from 90°C to 0°C in winter.

[0065] (1) When the temperature of the large water reservoir 1 is 0°C, the corresponding ice content is about 40%. The specific implementation process is as follows: When the water temperature of the large water reservoir 1 is 37-90°C, the large water reservoir enters the direct heating mode, the water circulation loop composed of the large water reservoir 1 and the buffer water tank 8 is opened, the water circulation loop composed of the buffer water tank 8 and the second plate heat exchanger 13 is opened, and other water circulation loops and refrigerant circulation loops are closed.

[0066] (2) When the water temperature of the large water reservoir 1 is between 0 and 37°C, the buffer water tank composite heating mode is entered. At this time, the water circulation loop composed of the data center supply / return water and the No. 1 plate heat exchanger 2 is turned on, the water circulation loop composed of the No. 1 plate heat exchanger 2 and the No. 1 heat pump evaporator 9 is turned on, the water circulation loop composed of the No. 1 heat pump condenser 10 and the buffer water tank 8 is turned on, the No. 1 heat pump circulation system is turned on (No. 1 heat pump evaporator 9, No. 1 heat pump condenser 10, the second compressor 36, the second throttling device 39), the water circulation loop composed of the buffer water tank 8 and the No. 1 heat pump condenser is turned on, and the solar collector 7 and the buffer water tank 8 are turned on. The water circulation loop is turned on, the water circulation loop composed of the large water reservoir 1 and the No. 2 heat pump evaporator 11 is turned on, the water circulation loop composed of the No. 2 heat pump condenser 12 and the buffer water tank 8 is turned on, the No. 2 heat pump circulation system is turned on (No. 2 heat pump evaporator 11, No. 2 heat pump condenser 12, the third compressor 37, the third throttling device 40), the water circulation loop composed of the buffer water tank 8 and the No. 2 plate heat exchanger 13 is turned on, and other water circulation loops and refrigerant circulation loops are closed to realize winter regional heating under the multi-combination system, requiring that at the end of winter, the water temperature of the large water reservoir 1 reaches 0°C and the ice content is about 40%.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A renewable energy and waste heat comprehensive utilization system, characterized in that: include: Data centers; A water storage tank, which is used to: use the heat of the data center to complete a heat storage process within a set first period, and use the heat stored in the heat storage process to supply a heat release process within a set second period; A water circulation system, which is provided with a plurality of water circulation loops; and, A refrigerant circulation system is provided with a refrigerant dry circulation system; wherein, The heat storage process and the heat release process are realized by cooperating with a plurality of water circulation loops and / or a plurality of refrigerant circulation systems; The water circulation system comprises: A first water circulation loop, comprising: a No. 1 plate heat exchanger, a water reservoir, a cooling tower, and a No. 1 heat pump evaporator, wherein one end of the No. 1 plate heat exchanger is respectively connected to the water reservoir, the cooling tower, and the No. 1 heat pump evaporator; The second water circulation loop comprises: a condensing end of the refrigeration unit, a water reservoir, and a cooling tower, wherein one end of the condensing end of the refrigeration unit is connected to the water reservoir and the cooling tower respectively; A third water circulation loop, comprising: a heat recovery end of the refrigeration unit and a water reservoir, wherein the heat recovery end of the refrigeration unit is in communication with the water reservoir; A fourth water circulation loop, comprising: a data center, a No. 1 plate heat exchanger and a refrigeration unit evaporator, wherein the cooling water supply / return interface of the data center is respectively connected to the No. 1 plate heat exchanger and the refrigeration unit evaporator; A fifth water circulation loop, comprising: a solar thermal collector, a water reservoir, and a buffer water tank, wherein the solar thermal collector is connected to the large water reservoir and the buffer water tank respectively; and A sixth water circulation loop, comprising: a buffer water tank, a solar thermal collector, a No. 1 heat pump condenser, a No. 2 heat pump condenser, and a No. 2 plate heat exchanger, wherein the buffer water tank is respectively connected to the large water reservoir, the solar thermal collector, the No. 1 heat pump condenser, the No. 2 heat pump condenser, and the No. 2 plate heat exchanger; The refrigerant circulation system comprises: A refrigeration unit circulation system, comprising a refrigeration unit evaporator, a compressor, a refrigeration unit heat recovery end, a refrigeration unit condensation end and a throttling device, wherein the refrigeration unit evaporator constitutes one end of the heat exchange process, the refrigeration unit heat recovery end and the refrigeration unit condensation end constitute the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process; A heat pump circulation system No. 1, comprising a heat pump evaporator No. 1, a compressor, a heat pump condenser No. 1 and a throttling device, wherein the heat pump evaporator No. 1 constitutes one end of the heat exchange process, the heat pump condenser No. 1 constitutes the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process; and, A No. 2 heat pump circulation system, which includes a No. 2 heat pump evaporator, a compressor, a No. 2 heat pump condenser and a throttling device, wherein the No. 2 heat pump evaporator constitutes one end of the heat exchange process, the No. 2 heat pump condenser constitutes the other end of the heat exchange process, and the compressor and the throttling device promote the heat exchange process; The heat source of the second heat pump evaporator includes a water source or an air source from a water reservoir, wherein when the water pump drives the water circulation loop, the water source from the water reservoir is used as the heat source, and when the water circulation loop is closed, the fan of the second heat pump evaporator is driven, and at this time, the air source is used as the heat source; The first period includes spring, summer and autumn, and the second period includes winter.

2. The renewable energy and waste heat comprehensive utilization system according to claim 1 is characterized in that: The top layer of the water reservoir is hot water and the bottom layer is cold water. When the outlet water is hot water and the return water is cold water, the water reservoir adopts the method of outlet water from the top and return water from the bottom to circulate water. When the outlet water is cold water and the return water is hot water, the water reservoir adopts the method of outlet water from the bottom and return water from the top to circulate water.

3. The renewable energy and waste heat comprehensive utilization system according to claim 1 is characterized in that: The top and surroundings of the water storage tank are provided with a heat-insulating layer.

4. The renewable energy and waste heat comprehensive utilization system according to claim 1, characterized in that: The heat storage process is a process in which water at 0°C with a certain ice content is heated to water at 90°C; the heat release process is a process in which water at 90°C is cooled to water at 0°C with a certain ice content.

5. A method for comprehensive utilization of renewable energy and waste heat, characterized in that: Using the renewable energy and waste heat comprehensive utilization system as described in any one of claims 1 to 4, The heat storage process includes: The first heat storage stage is used when the water temperature of the water storage tank is in the first heat storage temperature range. The process includes: starting the water circulation loop composed of the water storage tank and the No. 1 plate heat exchanger and starting the refrigeration unit circulation system, while other water circulation loops and refrigerant circulation systems are closed, and the water storage tank directly provides cooling for the data center; The second heat storage stage is used when the water temperature of the water storage tank is in the second heat storage temperature range. The process includes: opening the water circulation loop composed of the water storage tank and the condensing end of the refrigeration unit and opening the circulation system of the refrigeration unit, and closing other water circulation loops and refrigerant circulation systems, and the water storage tank provides coldness for the condensing end of the refrigeration unit; The third heat storage stage is used when the water temperature of the water reservoir is in the third heat storage temperature range. The process includes: opening the water circulation loop composed of the water reservoir and the heat recovery end of the refrigeration unit, opening the water circulation loop composed of the solar collector and the buffer water tank, and opening the circulation system of the refrigeration unit. Other water circulation loops and refrigerant circulation systems are closed. The water reservoir provides coldness for the heat recovery end of the refrigeration unit, and the solar collector stores heat for the buffer water tank. When the buffer water tank temperature rises to the first set temperature, the hot and cold water are replaced with the top water layer of the water reservoir, and the cycle is repeated; The fourth heat storage stage is used when the water temperature of the water reservoir is in the fourth heat storage temperature range, and the process includes: opening the water circulation loop composed of the water reservoir and the solar thermal collector, closing other water circulation loops and the refrigerant circulation system, and the solar thermal collector provides reserve heat for the water reservoir; The exothermic process comprises: The first heat release stage is used when the water temperature of the water storage tank is in the first heat release temperature range. The process includes: the water circulation loop composed of the water storage tank and the buffer water tank is opened, the water circulation loop composed of the buffer water tank and the second plate heat exchanger is opened, and other water circulation loops and refrigerant circulation systems are closed. The second heat release stage is used when the water temperature of the water reservoir is in the second heat release temperature range, and its process includes: at this time, the water circulation loop composed of the data center's supply / return water and No. 1 plate heat exchanger is turned on, the water circulation loop composed of No. 1 plate heat exchanger and No. 1 heat pump evaporator is turned on, the water circulation loop composed of No. 1 heat pump condenser and buffer water tank is turned on, the No. 1 heat pump circulation system is turned on, the water circulation loop composed of the buffer water tank and No. 1 heat pump condenser is turned on, the water circulation loop composed of the solar collector and the buffer water tank is turned on, the water circulation loop composed of the water reservoir and No. 2 heat pump evaporator is turned on, the water circulation loop composed of No. 2 heat pump condenser and buffer water tank is turned on, the No. 2 heat pump circulation system is turned on, the water circulation loop composed of the buffer water tank and No. 2 plate heat exchanger is turned on, and other water circulation loops and refrigerant circulation loops are closed.

6. The renewable energy and waste heat comprehensive utilization operation method according to claim 5, characterized in that: The first heat storage stage is a temperature of 0 to 20°C; the second heat storage stage is a temperature of 21 to 37°C; the third heat storage stage is a temperature of 38 to 60°C; the fourth heat storage stage is a temperature of 61 to 90°C; the first heat release temperature range is a water temperature of 37 to 90°C; the second heat release stage is a water temperature of 0 to 37°C.

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