Water cold storage system architecture
Through the system architecture of direct cooling and cooling, combined with refrigeration water pump and cold storage tank, the existing water storage system has been solved, and efficient and economical cold water supply and storage is achieved, which is suitable for semiconductor buildings.
Patent Information
- Application Number
- CN202420252085.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The existing water storage cooling system is low in efficiency and high investment cost, and is especially suitable for buildings with large semiconductor cooling loads and continuous cooling throughout the year. The traditional method is insufficient in applicability and economicality.
Adopt a system architecture of direct cooling and cooling, and through the combination of refrigeration water primary pump, refrigeration water secondary pump, chiller unit and cold storage tank, the system structure is simplified, and the cold storage tank is used to achieve cooling, refrigeration and cooling. Make a constant pressure hydration device to avoid adding additional equipment.
The efficiency of the chiller unit is improved, the operating cost is reduced, and the investment cost is reduced by simplifying the system structure, achieving efficient operation and economic optimization of the system.
Smart Images
Figure CN222317178U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water cooling system, in particular to a water cooling system architecture. Background Art
[0002] Water storage chilled water technology is a technology that utilizes the difference in electricity prices between peak and valley levels in the power grid, uses chillers to store cold during low electricity price periods, and uses the stored low-temperature chilled water to provide cooling for users during peak electricity price periods. This technology can transfer air conditioning electricity consumption during peak power periods to the valley level of the power grid, thereby saving users the operating costs of chillers, while also balancing the load of the power grid and achieving peak shifting and valley filling.
[0003] Existing water storage generally adopts a system architecture of indirect cold storage and cooling, or direct cold storage and indirect cooling. However, since the cold storage chiller needs to operate independently of the normal cold supply chiller, and the cold storage temperature must be lower than the normal cold supply temperature, the efficiency of the cold storage chiller is low during cold storage, which is not conducive to reducing operating costs. In addition, the above system architecture also requires the addition of heat exchange plates, constant pressure water replenishment devices, and control valves, which makes the system complex and the investment cost high.
[0004] For projects such as semiconductors, which have large cooling loads, continuous cooling throughout the year, and buildings that are generally 40 meters high or less, the applicability and economy of traditional water storage cooling methods need to be optimized. Utility Model Content
[0005] The utility model provides a water storage cooling system architecture, which can not only reduce operating costs, but also simplify the system and reduce investment costs.
[0006] The utility model provides a water cold storage system architecture, including a chiller, a chilled water primary pump, a chilled water secondary pump and a cold storage water tank;
[0007] The water inlet of the chiller is connected to the water outlet of the chilled water primary pump, the water outlet of the chiller is connected to the water inlet of the chilled water secondary pump, and the water outlet of the chiller is also connected to the cold water storage tank;
[0008] The water outlet of the chilled water secondary pump is connected to the water inlet of the end user, and the water outlet of the end user is connected to the water inlet of the chilled water primary pump;
[0009] The cold water storage tank is also connected to the water inlet of the chilled water primary pump.
[0010] The water cold storage system architecture in the utility model can realize the cold supply, cold charging and cold discharge of the system by setting a chilled water primary pump, a chilled water secondary pump, a chiller and a cold storage water tank. When the system is normally supplying cold, the output flow of the chilled water primary pump can be slightly greater than the output flow of the chilled water secondary pump, and the chilled water after heat exchange by the chiller basically enters the end user through the chilled water secondary pump, thereby performing heat exchange for the end user. When the system is charging cold, the output flow of the chilled water primary pump can be greater than the output flow of the chilled water secondary pump, and a part of the chilled water after heat exchange by the chiller flows to the chilled water secondary pump, thereby performing heat exchange for the end user, and the other part of the chilled water can flow to the cold storage water tank for cold supply. When the system is discharging cold, the output flow of the chilled water primary pump can be less than the output flow of the chilled water secondary pump, and all the chilled water after heat exchange by the chiller flows to the chilled water secondary pump, and a part of the chilled water in the cold storage water tank flows to the chilled water secondary pump to supplement the flow difference between the chilled water primary pump and the chilled water secondary pump, thereby achieving cold discharge. The water storage system architecture of the utility model can improve the efficiency of the chiller due to the direct cold storage and cooling mode, thereby reducing the operating cost. In addition, the system structure is simple, and the cold storage water tank is used as a constant pressure water replenishment and exhaust device and a chiller, avoiding the cost of additional equipment, which is conducive to reducing costs.
[0011] In some possible implementation schemes, the liquid level inside the cold water storage tank is 1m to 5m higher than the highest water usage point of the end user.
[0012] In some possible implementation schemes, the cold water storage tank further includes a water replenishment port, and the water replenishment port is located near the top of the cold water storage tank.
[0013] In some possible implementation schemes, a water level sensor is provided inside the cold water storage tank, and the water level sensor is used to detect the water level in the cold water storage tank.
[0014] In some possible implementation schemes, a plurality of temperature sensors are disposed inside the cold water storage tank, and the plurality of temperature sensors are spaced apart along the height direction of the cold water storage tank, and each of the temperature sensors is used to detect the water temperature at a corresponding height.
[0015] In some possible implementation schemes, a balancing pipe is further included, one end of which is connected between the water outlet of the chiller and the water inlet of the chilled water secondary pump, and the other end of which is connected between the water outlet of the end user and the water inlet of the chilled water primary pump, and the cold water storage tank is connected in series to the balancing pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of a water cooling system architecture in an embodiment of the utility model;
[0017] Figure 2 for Figure 1 The state of the grey water cooling system architecture during normal cooling or cooling storage;
[0018] Figure 3 for Figure 1 A state of the grey water chilled storage system architecture when cooling.
[0019] In the figure:
[0020] 10-primary chilled water pump; 20-chilled water unit; 30-cold water storage tank; 31-first circulation port; 32-second circulation port; 33-water replenishment port; 40-secondary chilled water pump; 50-end user; 60-balance pipe. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] refer to Figure 1 The water cold storage structure in the embodiment of the utility model includes a chiller 20, a chilled water primary pump 10, a chilled water secondary pump 40 and a cold water storage tank 30. Among them, the water inlet of the chiller 20 is connected to the water outlet of the chilled water primary pump 10, the water outlet of the chiller 20 is connected to the water inlet of the chilled water secondary pump 40, and the water outlet of the chiller 20 is also connected to the cold water storage tank 30, that is, the chilled water pumped into the chiller 20 by the chilled water primary pump 10 can exchange heat with the chiller 20, so that the temperature of the chilled water is reduced, and the chilled water with reduced temperature can enter both the chilled water secondary pump 40 and the cold water storage tank 30. The water outlet of the chilled water secondary pump 40 can be connected to the water inlet of the end user 50, the water outlet of the end user 50 is connected to the water inlet of the chilled water primary pump 10, and the cold water storage tank 30 is also connected to the water inlet of the chilled water primary pump 10.
[0023] Specifically, Figure 1 As shown, the water cold storage system architecture in this embodiment can be provided with a balance pipe 60, one end of which is connected between the water outlet of the chiller 20 and the water inlet of the chilled water secondary pump 40, and the other end of which is connected between the water outlet of the end user 50 and the water inlet of the chilled water primary pump 10. At this time, the cold storage water tank 30 can be connected in series to the balance pipe 60, so that a part of the system can enter the cold storage water tank 30 through the balance pipe 60.
[0024] The water cold storage system architecture in this embodiment can be used not only for cold supply, but also for cold storage and cold release. When the water cold storage system architecture is used for normal cold supply, the output flow rate of the chilled water primary pump 10 can be slightly greater than the output flow rate of the chilled water secondary pump 40, so that the chilled water is pumped into the end user 50 by the chilled water secondary pump 40, thereby performing heat exchange for the end user 50. When the water cold storage system architecture is used for cold storage, the output flow rate of the chilled water primary pump 10 can be greater than the output flow rate of the chilled water secondary pump 40, so that a part of the chilled water is pumped into the end user 50 by the chilled water secondary pump 40 to perform heat exchange for the end user 50, and the other part of the chilled water enters the cold storage water tank 30 through the balance pipe 60 for cold charging. When the water cold storage system architecture is used for cold release, the output flow rate of the chilled water primary pump 10 can be lower than the output flow rate of the chilled water secondary pump 40, and the cold storage water tank 30 replenishes chilled water to the chilled water secondary pump 40 through the balance pipe 60, thereby achieving cold release of the cold storage water tank 30.
[0025] It should be understood that the water cold storage system architecture in this embodiment, by providing a chilled water primary pump 10 and a cold storage water tank 30, and by adjusting the output flow of the chilled water primary pump 10, not only achieves normal cooling, but also achieves direct charging and cooling, avoiding the temperature difference loss caused by indirect charging and cooling, which is conducive to reducing operating costs. In addition, the system structure is simple, and the cold storage water tank 30 is used as a constant pressure water replenishment and exhaust device and a chiller, avoiding the cost of additional equipment, which is conducive to reducing investment costs.
[0026] In some embodiments, continue to refer to Figure 1 The bottom of the cold water tank 30 is provided with a first circulation port 31, and the top of the cold water tank 30 is provided with a second circulation port 32. When the cold water tank 30 is charged with cold water, the chilled water after heat exchange with the chiller 20 can enter the cold water tank 30 through the first circulation port 31 and be stored at the bottom of the cold water tank 30 when entering the cold water tank 30 through the balance pipe 60. The chilled water in the upper layer of the cold water tank 30 enters the system through the second circulation port 32 for recirculation. When the cold water tank 30 is used for cooling, the chilled water with a lower temperature stored in the cold water tank 30 flows from the first circulation port 31 to the chilled water secondary pump 40, so that the end user 50 can be effectively exchanged with heat. A part of the chilled water in the system that has undergone heat exchange with the end user 50 can also enter the cold water tank 30 through the second circulation port 32 to play a role in constant pressure.
[0027] In this embodiment, the liquid level inside the cold water storage tank 30 is higher than the highest water consumption point of the end user 50. Specifically, the liquid level inside the cold water storage tank 30 is 1m to 5m higher than the highest water consumption point of the end user 50. At this time, the cold water storage tank 30 can also serve as a constant pressure device of the system, saving investment costs.
[0028] In addition, a plurality of temperature sensors (not shown in the figure) may be arranged in the cold water pipe, and the plurality of temperature sensors may be arranged at intervals along the height direction of the cold water tank 30. The plurality of temperature sensors may be used to detect the distribution of the temperature field in the cold water tank 30, that is, the water temperature of each layer in the cold water tank 30 may be monitored by arranging a plurality of temperature sensors. In the process of charging the cold water tank 30, since the chilled water cooled by the chiller 20 continuously enters the bottom of the cold water tank 30, the chilled water in the upper layer of the cold water tank 30 is replaced by the chiller 20 for cooling. When the temperature of the upper layer of the chilled water is reduced to a preset value, the chilled water primary pump 10 may be turned off to reduce the chilled water output flow of the chiller 20, thereby controlling the temperature of the chilled water in the cold water tank 30.
[0029] Further, continue to refer to Figure 1 A water replenishment port 33 is also provided near the top of the cold water tank 30, and a water level sensor (not shown in the figure) is also provided in the cold water tank 30, which is used to detect the water level in the cold water tank 30. When the water level in the cold water tank 30 is lower than the preset value, the water replenishment port 33 can be opened to replenish the cold water tank 30, so as to maintain the normal liquid level of the cold water tank 30. At this time, the cold water tank 30 can also serve as a constant pressure water replenishment and exhaust device, thereby saving the cost of separately setting up a constant pressure water replenishment and exhaust device.
[0030] To facilitate understanding of the different operation modes of the water storage cooling system architecture in this embodiment, the following will be combined with Figure 2 and Figure 3 The specific working process of the water storage cooling system architecture under different operating modes is introduced.
[0031] Combination Figure 2 , the water cold storage system architecture in this embodiment can increase the output flow rate of the chilled water primary pump 10 when charging cold, so that the output flow rate of the chilled water primary pump 10 is greater than the output flow rate of the chilled water secondary pump 40. After the chilled water passing through the chilled water primary pump 10 is pumped into the chiller 20 to complete the heat exchange, a part of it flows to the chilled water secondary pump 40 to exchange heat with the end user 50, and the part exceeding the output flow rate of the chilled water secondary pump 40 enters the cold storage water tank 30 through the balance pipe 60 for charging cold. In this process, the cold storage water tank 30 is not only a cold storage device, but also a constant pressure device of the system. At this time, the first flow port 31 of the cold storage water tank 30 is used to flow in chilled water, and the second flow port 32 is used to flow out chilled water. The cold storage water tank 30 can be regarded as an end user 50 put into system operation. In addition, the cold charging rate can be controlled by controlling the output flow rate of the chilled water primary pump 10. The larger the output flow rate of the chilled water primary pump 10, the larger the cold charging rate, so that the system can complete the cold storage work while providing normal cooling, and the system control is simple, the operation is efficient and energy-saving.
[0032] After the cold charging is completed and the cold water is not released, the output flow of the chiller 20 can be reduced by turning off the primary chilled water pump 10, so that the system can return to normal cooling.
[0033] Reference again Figure 2 In the water cold storage system architecture of this embodiment, when the cooling is normally provided, the output flow rate of the primary chilled water pump 10 is slightly greater than the output flow rate of the secondary chilled water pump 40. After the chilled water passing through the primary chilled water pump 10 is pumped into the chiller 20 to complete the heat exchange, most of it flows to the secondary chilled water pump 40 to exchange heat with the end user 50. The remaining small part enters the cold storage water tank 30 through the balance pipe 60, and the cold storage water tank 30 is charged with cold at a low speed, thereby suppressing and eliminating the inclined temperature layer in the cold storage water tank 30.
[0034] It is worth noting that the system architecture in this embodiment has two working modes, normal cooling and cold storage, and the main difference lies in the output flow rate of the primary chilled water pump 10. The output flow rate of the primary chilled water pump 10 in the cold storage mode is greater than the output flow rate of the primary chilled water pump 10 in the normal cooling mode.
[0035] Combination Figure 3 In the cold water storage system architecture of this embodiment, when cooling, the output flow rate of the primary chilled water pump 10 is reduced, so that the output flow rate of the primary chilled water pump 10 is less than the output flow rate of the secondary chilled water pump 40, that is, the output flow rate of the chiller 20 is less than the output flow rate of the secondary chilled water pump 40. At this time, the chilled water in the cold storage water tank 30 flows to the secondary chilled water pump 40 through the balance pipe 60 to replenish the secondary chilled water pump 40 with chilled water, thereby achieving the cooling of the cold storage water tank 30. In this process, the cold storage water tank 30 can be regarded as a chiller for providing chilled water to the end user 50. In addition, the cooling rate of the cold storage water tank 30 can be controlled by controlling the output flow rate of the primary chilled water pump 10. The larger the output flow rate of the primary chilled water pump 10, the smaller the cooling rate of the cold storage water tank 30.
[0036] In addition, after cooling is completed and before cold storage begins, the water cold storage system architecture in this embodiment operates according to the normal cooling control mode.
[0037] In addition, it is worth mentioning that the water storage system architecture in this embodiment realizes automatic charging and discharging of cold water by controlling the output flow of the primary chilled water pump. The system control is simple and can save operating costs.
[0038] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A water storage cooling system architecture, characterized in that: Including chillers, chilled water primary pumps, chilled water secondary pumps and cold water storage tanks; The water inlet of the chiller is connected to the water outlet of the chilled water primary pump, the water outlet of the chiller is connected to the water inlet of the chilled water secondary pump, and the water outlet of the chiller is also connected to the cold water storage tank; The water outlet of the chilled water secondary pump is connected to the water inlet of the end user, and the water outlet of the end user is connected to the water inlet of the chilled water primary pump; The cold water storage tank is also connected to the water inlet of the chilled water primary pump.
2. The water storage cooling system architecture according to claim 1 is characterized in that: The liquid level inside the cold water storage tank is 1m to 5m higher than the highest water use point of the end user.
3. The water storage cooling system architecture according to claim 1, characterized in that: The cold water storage tank also includes a water replenishment port, which is located near the top of the cold water storage tank.
4. The water storage cooling system architecture according to claim 3 is characterized in that: A water level sensor is provided inside the cold water storage tank, and the water level sensor is used to detect the water level in the cold water storage tank.
5. The water storage cooling system architecture according to claim 1, characterized in that: A plurality of temperature sensors are arranged inside the cold water storage tank, and the plurality of temperature sensors are arranged at intervals along the height direction of the cold water storage tank, and each of the temperature sensors is used to detect the water temperature at a corresponding height.
6. The water storage cooling system architecture according to claim 1, characterized in that: It also includes a balancing pipe, one end of which is connected between the water outlet of the chiller and the water inlet of the chilled water secondary pump, and the other end of which is connected between the water outlet of the end user and the water inlet of the chilled water primary pump, and the cold water storage tank is connected in series to the balancing pipe.