Vertical phase change cold storage tank with cold charge and release balance

Abstract

The utility model discloses a vertical phase change cold storage tank with balanced cold charging and releasing. The vertical phase change cold storage tank comprises a tank body and a plurality of groups of cold storage components arranged in the tank body, a plurality of horizontal partition plates are arranged in the tank body in the height direction of the tank body, liquid passing holes are formed in the horizontal partition plates located above the lowermost horizontal partition plate, the liquid passing holes of every two adjacent horizontal partition plates are arranged in a staggered mode, and a plurality of baffling channels are formed in the tank body from bottom to top. A plurality of cold storage plates are horizontally stacked on each horizontal partition plate, and a gap allowing a secondary refrigerant to circulate is formed between every two adjacent cold storage plates. The thickness and the plate spacing of the cold storage plate are uniquely designed, the thickness of the plate body of the cold storage plate is gradually reduced along the flowing direction of the secondary refrigerant, and meanwhile, the flow velocity of the secondary refrigerant is consistent or the flow velocity of the back is higher, so that the time for completing cold filling can be consistent, the front cold storage plate is prevented from completing phase change, and the energy consumption is reduced. The back cold storage plate has no phase change, so that the cold charging time of the whole heat exchanger is longer.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold storage equipment technical field, concretely relates to a vertical phase change cold storage tank of charge release cold balance. BACKGROUND

[0002] With the country launched to encourage peak load shifting power policy, to make full use of power resources, cold storage air conditioner is therefore favored by people. At present, water storage equipment and ice storage equipment have been developed in the market, the above two are to use the peak and valley electricity price difference, store cold / heat at the low valley electricity price period, use the stored cold / heat to provide air conditioning cold / heat at the daytime power peak period. When the air conditioning use time and non air conditioning use time and power grid peak and low valley are synchronous, the air conditioning power consumption of power grid peak time can be transferred to the power grid low valley time.

[0003] Reference 1: Chinese patent document with publication number CN 117029545 A

[0004] Reference 1 discloses a cold storage tank, a cold storage system and a control method thereof, which can be used in the financial field or other fields. The cold storage tank is internally provided with a plurality of partitions for separating the cold storage tank into a plurality of cold storage spaces, wherein each cold storage space is placed with a hollow energy storage small ball, and the energy storage small ball is internally filled with phase change cold storage material; the upper part of the cold storage tank is provided with a water inlet pipeline for flowing in high temperature water; and the lower part of the cold storage tank is provided with a water outlet pipeline for flowing out low temperature water.

[0005] Reference 2: Chinese patent document with publication number CN 118757966 A

[0006] Reference 2 discloses a water storage and phase change storage combined type cold storage device and a cold storage release control method thereof. The device comprises a cold storage tank, an isolation support net is arranged near the bottom of the cold storage tank, a phase change material distribution frame is supported in the cold storage tank and located on the isolation support net, the phase change material distribution frame is distributed with phase change material cold storage units, the phase change material distribution frame makes the phase change material cold storage units dispersed in water in the cold storage tank, and the water is used for cold storage and heat conduction. The cold storage device adopts 5℃ phase change material cold storage units, and uses water as the medium for cold storage and heat conduction, solving the problem of low heat conduction efficiency in the cold storage release process; especially, the phase change material cold storage module is separated into a plurality of small phase change material cold storage units dispersed in the water medium, thereby greatly improving the working efficiency of cold storage and release. The cold storage control method adopts a segmented step-by-step cold storage mode, further improving the working efficiency of cold storage.

[0007] However, the existing phase change cold storage equipment still has the following problems:

[0008] The cold storage / heat release of the cold storage plates at different positions in the cold storage device is not balanced, the cold storage plates close to the inlet of the cold carrier are fully charged in a short time, the cold storage boxes far from the inlet of the cold carrier need a longer time to be fully charged, and finally the charging time of the whole cold storage device is prolonged. Utility model content

[0009] The utility model discloses to solve the technical problem of the uneven cold storage / heat release of the cold storage plates at different positions in the prior art phase change cold storage device, and provides a vertical phase change cold storage tank with balanced charging and heat release.

[0010] The utility model discloses to solve the technical problem of the uneven cold storage / heat release of the cold storage plates at different positions in the prior art phase change cold storage device, and provides a vertical phase change cold storage tank with balanced charging and heat release.

[0011] The tank body is provided with a plurality of horizontal partitions in the height direction, the horizontal partitions above the lowermost horizontal partition are provided with liquid passing holes, the liquid passing holes of adjacent two horizontal partitions are staggered, and the inside of the tank body forms a plurality of zigzag channels from bottom to top.

[0012] A plurality of cold storage plates are horizontally stacked on each horizontal partition, the adjacent cold storage plates have gaps for the flow of the cold carrier, the thickness of the cold storage plates on the same horizontal partition and the gap between the adjacent cold storage plates are the same, and the thickness of the cold storage plates on different horizontal partitions and the gap between the adjacent cold storage plates have the following rules: from bottom to top, the thickness of the cold storage plates gradually decreases, and the product of the number of the cold storage plates and the distance between the adjacent cold storage plates remains unchanged or gradually decreases.

[0013] As a further optimization of the vertical phase change cold storage tank with balanced charging and heat release, the ratio of the thickness of the cold storage plates on the same horizontal partition to the distance between the adjacent cold storage plates is k, 1≤k≤7, the value of k is different on different horizontal partitions, and the value of k changes as follows: from bottom to top, k gradually increases.

[0014] As a further optimization of the vertical phase change cold storage tank with balanced charging and heat release, the phase change materials of the cold storage plates on the same horizontal partition are the same, the phase change materials filled in the cold storage plates on different horizontal partitions are different, and the thermal conductivity of the phase change materials changes as follows: from bottom to top, the thermal conductivity of the phase change materials gradually increases.

[0015] As a further optimization of the vertical phase change cold storage tank with balanced charging and heat release, two limiting nets are arranged between the adjacent horizontal partitions, and the two limiting nets correspond to the edges of the upper and lower liquid passing holes respectively.

[0016] As a further optimization of the vertical phase change cold storage tank with balanced charging and heat release, the peripheral cold storage plates are limited by the positioning angle steel.

[0017] As a further optimization of the utility model discloses a vertical phase change cold storage tank of equalization of filling and releasing cold: the distributor is arranged at the entrance of the cold carrier in the tank body.

[0018] As a further optimization of the utility model discloses a vertical phase change cold storage tank of equalization of filling and releasing cold: the cold storage plate comprises a cold storage plate body, the cold storage plate body has a phase change cold storage material storage cavity, one end of the cold storage plate body is provided with a loading port, the upper and lower surfaces of the cold storage plate body are provided with a plurality of parallel flow guide grooves, a plurality of V-shaped protrusions or arc protrusions are uniformly distributed along the length direction between adjacent two flow guide grooves and between the outermost flow guide groove and the body side edge on the surface of the cold storage plate body.

[0019] As a further optimization of the utility model discloses a vertical phase change cold storage tank of equalization of filling and releasing cold: the tank body is provided with an exhaust valve and a safety valve, the lowermost horizontal partition plate is a grating plate, and the bottom of the tank body is provided with a drain valve.

[0020] As a further optimization of the utility model discloses a vertical phase change cold storage tank of equalization of filling and releasing cold: the tank body bottom side wall is provided with a cold carrier inlet, and the tank body top side wall is provided with a cold carrier outlet.

[0021] As a further optimization of the utility model discloses a vertical phase change cold storage tank of equalization of filling and releasing cold: the phase change material filled in the cold storage plate is a hydrated salt phase change material, and the cold carrier is water.

[0022] The utility model has the advantages that the thickness of the cold storage plate and the plate spacing are uniquely designed, the plate body thickness of the cold storage plate gradually thins along the flow direction of the cold carrier, the product of the number of the cold storage plate and the spacing between adjacent cold storage plates remains unchanged or gradually becomes smaller, the flow speed of the cold carrier in the front and rear is consistent or the flow speed in the rear is higher, the time of completing the cold filling can be guaranteed to be consistent, the phase change of the front cold storage box is completed, and the phase change of the rear cold storage box is not completed, so that the cold filling time of the whole heat exchanger is longer. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is whole structure schematic diagram of vertical cold storage tank;

[0024] Figure 2 It is the layout schematic diagram of cold storage plate on horizontal partition plate;

[0025] Figure 3 It is the setting position schematic diagram of liquid hole on adjacent two horizontal partition plates;

[0026] Figure 4 It is the whole structure schematic diagram of cold storage plate (form one);

[0027] Figure 5A schematic diagram of the assembly state of the cold storage plate (Form 1);

[0028] Figure 6 A schematic diagram of the overall structure of the cold storage plate (Form 2);

[0029] Figure 7 A schematic diagram of the V-shaped protrusions and V-shaped grooves of the cold storage plate (Form 2);

[0030] Figure 8 This is a schematic diagram of the assembly state of the cold storage plate (Form 2);

[0031] Figure 9 A schematic diagram of the overall structure of the cold storage plate (Form 3);

[0032] Figure 10 A schematic diagram of the first and second protrusions of the cold storage plate (Form 3);

[0033] Figure 11 A schematic diagram of the assembly state of the cold storage plate (Form 3);

[0034] Figure 12 This is a schematic diagram of the overall structure of the cold storage plate (with clearance grooves);

[0035] Marked in the image:

[0036] 1. Cold storage plate;

[0037] 2. Flow guide channel;

[0038] 3. V-shaped protrusion;

[0039] 4. V-shaped groove;

[0040] 5. First protrusion;

[0041] 6. Second protrusion;

[0042] 7. Clearance groove;

[0043] 8. Tank body;

[0044] 9. Horizontal partition;

[0045] 10. Limiting net;

[0046] 11. Positioning angle steel;

[0047] 12. Liquid passage hole. Detailed Implementation

[0048] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0049] like Figures 1-3As shown: a kind of vertical phase change cold storage tank of full release cold balance, including tank body 8 and the cold storage plate 1 inbuilt in tank body 8, tank body 8 bottom is provided with the inlet of heat transfer medium, and tank body 8 top is provided with the outlet of heat transfer medium.Tank body 8 is the conventional vertical tank body 8, and heat transfer medium (water) flows from bottom to top in tank body 8.

[0050] Tank body 8 is provided with multiple horizontal partitions 9 along its height direction, and the horizontal partition 9 above the lowermost horizontal partition 9 is provided with liquid passing hole 12, and the liquid passing holes 12 of adjacent two horizontal partitions 9 are staggered, and multiple baffling passages are formed in tank body 8 from bottom to top.Tank body 8 top is provided with exhaust valve and safety valve, and the horizontal partition 9 at the lowermost is the grid plate, and the bottom of tank body 8 is provided with drain valve, and the distributor is arranged in tank body 8 corresponding to the inlet of heat transfer medium.

[0051] Each horizontal partition 9 is horizontally stacked with multiple cold storage plates 1, and the adjacent cold storage plates 1 have gaps for the flow of heat transfer medium.As the cold storage plates 1 are stacked on the horizontal partition 9, in order to prevent the displacement of the cold storage plates 1, two limiting nets 10 can be arranged between adjacent horizontal partitions 9, and the two limiting nets 10 correspond to the edges of the upper and lower liquid passing holes 12 respectively, and the cold storage plates 1 are located in the space surrounded by the limiting nets 10.Of course, the displacement of the cold storage plates 1 can also be prevented by arranging the positioning angle steel 11 around the cold storage plates 1.

[0052] The thickness of the cold storage plates 1 on the same horizontal partition 9 and the gap between adjacent cold storage plates 1 are the same, and the thickness of the cold storage plates 1 on different horizontal partitions 9 and the gap between adjacent cold storage plates 1 have the following rules: from bottom to top, the thickness of the cold storage plates 1 gradually decreases, and the product of the number of cold storage plates 1 and the gap between adjacent cold storage plates 1 remains unchanged or gradually decreases.

[0053] The specifications of the cold storage plates 1 on the same horizontal partition 9 are the same, and the phase change materials filled in the cold storage plates 1 are also the same.It can be foreseen that, as the thickness of the cold storage plates 1 gradually decreases along the flow direction of the heat transfer medium, the number of cold storage plates 1 on the horizontal partition 9 also tends to increase along the flow direction of the heat transfer medium.

[0054] The ratio of the thickness of the cold storage plates 1 on the same horizontal partition 9 to the gap between adjacent cold storage plates 1 is k, and 1≤k≤7.The k values of different cold storage assemblies are different, and the k values change as follows: along the flow direction of the heat transfer medium, k gradually increases.

[0055] The phase change materials filled in the cold storage plates 1 on the same horizontal partition 9 are the same, and the phase change materials filled in the cold storage plates 11 of different cold storage assemblies are different, and the phase change materials change as follows: along the flow direction of the heat transfer medium, the thermal conductivity of the phase change material gradually increases.

[0056] Along the flow direction of the cold carrier, the thickness of the cold storage plate 1 gradually thins, and the product of the number of cold storage plates 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases, so that the flow rates of the cold carrier in the front and rear are consistent or the flow rate in the rear is higher, so that the charging and cooling time can be guaranteed to be consistent, avoiding the situation that the front cold storage box completes the phase change, and the rear cold storage box does not complete the phase change, resulting in a longer charging and cooling time of the entire heat exchanger.

[0057] Water can be used as a cold carrier. Water has a high specific heat capacity and can absorb or release a large amount of heat while its temperature changes relatively little, which enables it to effectively store and transfer cold during charging and discharging. Moreover, water has stable chemical properties and will not react under normal charging and discharging conditions, and will not cause corrosion and other adverse effects on the cold storage equipment and the cooled object.

[0058] The cold storage plate 1 includes a cold storage plate body having a phase change cold storage material storage cavity, and the cold storage plate body has a loading port at one end. The upper and lower surfaces of the cold storage plate body are provided with a plurality of parallel flow guide grooves 2, and the surface of the cold storage plate body between adjacent two flow guide grooves 2 and between the outermost flow guide groove 2 and the side edge of the body is uniformly distributed with a plurality of V-shaped protrusions 3 or arc-shaped protrusions along the length direction.

[0059] The loading port of the cold storage plate body is provided with a loading nozzle and a cap, which is mainly used to facilitate the filling of phase change material into the cold storage plate 1. There are at least two ways to set the loading nozzle:

[0060] The loading port of the cold storage plate body is located in the notch, and the loading nozzle is hidden in the notch. The shape of the entire cold storage plate body is relatively regular, but the loading nozzle of this form cannot completely fill the inside of the cold storage plate body. Some organic phase change materials are liquid at room temperature, and will solidify into solid state when the temperature decreases below the melting point. The volume of the organic phase change material will decrease during the solidification process, because the molecules are relatively loose in liquid state, and are more closely arranged in solid state. Even if the material is filled, it will not cause the cold storage plate 1 to deform during the phase change process.

[0061] Another form is that the loading port of the cold storage plate body is provided with a threaded loading nozzle, and the cap is screwed on the loading nozzle. The end of the cold storage plate body opposite to the loading nozzle is provided with a suitable avoidance slot 7. When a plurality of cold storage plates 1 are connected, the loading nozzle of the adjacent cold storage plate 1 can be placed in the avoidance slot 7 (see Figure 12 ).

[0062] The phase change material filled in the cold storage plate can be a hydrated salt phase change material, which mainly achieves cold storage through its solid-liquid phase change at a specific temperature. During the cold storage process, when the ambient temperature is lower than the phase change temperature of the hydrated salt, the hydrated salt changes from a liquid to a solid state, releasing the latent heat of phase change, thus achieving cold storage. During the cold release process, when the ambient temperature is higher than the phase change temperature of the hydrated salt, the hydrated salt changes from a solid to a liquid state, absorbing heat from the surroundings, thus achieving cold release.

[0063] The specific forms of the cold storage plate body are as follows:

[0064] Form 1: such as Figures 4-5 As shown, the material of the cold storage plate body can usually be plastic, such as HDPE and PE. Plastic materials are widely used in the manufacture of cold storage plates due to their good plasticity, durability, and cost-effectiveness. HDPE (high-density polyethylene) and PE (polyethylene) are not only safe and non-toxic, but also have good cold insulation properties and reusability.

[0065] The upper and lower surfaces of the cold storage plate body are provided with multiple parallel guide grooves 2, and the cross-section of the guide grooves 2 is an inverted trapezoid. Multiple V-shaped protrusions are evenly distributed along the length of the surface of the cold storage plate body between two adjacent guide grooves 2 and between the outermost guide groove 2 and the side of the body.

[0066] The raised openings on the upper and lower surfaces of the cold storage plate body face opposite directions. The upper and lower surfaces of the cold storage plate body are also provided with end grooves, the cross-section of which is V-shaped. One end of the end groove connects to the end face of the cold storage plate body, and the other end extends into the interval of the guide groove 2.

[0067] Through the above-mentioned unique surface structure design, the turbulence of the heat transfer medium on the surface of the cold storage plate can be improved, thereby improving the heat transfer efficiency. In addition, the cold storage plate 1 has a strong ability to withstand external pressure and the sealing port does not leak.

[0068] Form 2: such as Figures 6-8 As shown, this form has the same overall structure as <Form 1>, the difference being that: a V-shaped groove 4 is provided between two adjacent protrusions in the same column, and the orientation of the V-shaped groove 4 or the arc-shaped groove is consistent with that of the V-shaped protrusion 3.

[0069] Form 3: such as Figures 9-11 As shown, this form has the same overall structure as <Form 1>, the difference being that the heights of the protrusions in the same column are inconsistent.

[0070] The protrusions in the same column include a first protrusion 5 with a height of h1 and a second protrusion 6 with a height of h2, where h1 > h2. The multiple protrusions in the same column are arranged in a pattern of "first protrusion, second protrusion, second protrusion, first protrusion, second protrusion, second protrusion, first protrusion..."

[0071] The cold storage plate effectively captures the cold energy carried by the cooling water generated by the water chiller by virtue of its special design and the phase change material filled therein. The phase change material has specific thermodynamic properties and can change phase, such as changing from liquid to solid or changing from one crystal state to another crystal state, in a low-temperature environment, thereby storing a large amount of latent heat and achieving cold energy storage.

[0072] When the day comes and the power peak period occurs, the servers, storage devices and other large heat-generating electronic components in the data center require a stable low-temperature environment to ensure their normal operation. At this time, the phase change cold storage tank begins to release cold energy. Through a reasonably arranged heat exchange system, the reverse phase change process occurs in the cold storage tank, and the stored cold energy is transferred to the refrigerant, which is then evenly distributed to each area of the data center through a precisely designed pipe network, thereby effectively reducing the temperature of the data center and meeting the cooling demand of the data center.

[0073] This working mode effectively realizes the "peak load shifting" of electricity. During the power peak period, the phase change cold storage tank is used to release cold energy for data center cooling, which significantly reduces the amount of electricity obtained from the power grid for cooling in the data center, thereby relieving the power supply pressure of the power grid during the peak period. At the same time, during the night power valley period, the process of the water chiller charging the cold storage tank increases the power load during the valley period, thereby improving the power utilization rate of the power system during the valley period, making the power resources more reasonably distributed and utilized in the time dimension, and having important significance for optimizing the operation efficiency and economy of the power system.

[0074] The thickness of the cold storage plate and the plate spacing are uniquely designed, and the thickness of the plate body of the cold storage plate 1 gradually thins along the flow direction of the cold carrier, and the product of the number of the cold storage plate 1 and the spacing between adjacent cold storage plates 1 remains unchanged or gradually decreases, so that the flow direction of the cold carrier is consistent or higher in the back flow speed of the cold carrier, so that the time of completing the charging and cooling can be guaranteed to be consistent, and the front cold storage box completes the phase change, and the rear cold storage box does not complete the phase change, thereby causing the charging and cooling time of the entire heat exchanger to be longer.

[0075] The specific embodiments of the utility model have been described above. It should be understood that the utility model is not limited to the above specific embodiments, and those skilled in the art can make various modifications or changes within the scope of the claims, which does not affect the essential content of the utility model.

Claims

1. A vertical phase change cold storage tank with full release and cold balance, comprising a vertically arranged tank body (8) and a cold storage plate (1) arranged in the tank body (8), characterized in that: a plurality of horizontal partitions (9) are arranged in the tank body (8) along the height direction, the horizontal partitions (9) above the lowermost horizontal partition (9) are each provided with a liquid passing hole (12), the liquid passing holes (12) of adjacent two horizontal partitions (9) are staggered, and the inside of the tank body (8) forms a plurality of zigzag channels from bottom to top; a plurality of cold storage plates (1) are horizontally stacked on each horizontal partition (9), there is a gap between the upper and lower adjacent cold storage plates (1) for the flow of the cold carrier, the thickness of the cold storage plates (1) on the same horizontal partition (9) and the gap between the upper and lower adjacent cold storage plates (1) are the same, and the thickness of the cold storage plates (1) and the gap between the adjacent cold storage plates (1) on different horizontal partitions (9) have the following rules: from bottom to top, the thickness of the cold storage plates (1) gradually decreases, and the product of the number of the cold storage plates (1) and the distance between the adjacent cold storage plates (1) remains unchanged or gradually decreases. The ratio of the thickness of the cold storage plates (1) on the same horizontal partition (9) to the distance between the adjacent cold storage plates (1) is k, 1≤k≤7, the value of k is different on different horizontal partitions (9), and the value of k changes as follows: from bottom to top, k gradually increases. The phase change materials of the cold storage plates (1) on the same horizontal partition (9) are the same, the phase change materials filled in the cold storage plates (1) on different horizontal partitions (9) are different, and the thermal conductivity of the phase change materials gradually increases from bottom to top.

2. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: Two limiting nets (10) are arranged between the adjacent horizontal partitions (9), and the two limiting nets (10) correspond to the edges of the upper and lower liquid passing holes (12) respectively, and the cold storage plates (1) are located in the space surrounded by the limiting nets (10).

3. The charge-to-discharge thermally regenerative vertical phase change cold storage tank of claim 1, wherein: The outer peripheral cold storage plates (1) are limited by the positioning angle steel (11).

4. The charge-to-discharge thermally regenerative vertical phase change cold storage tank of claim 1, wherein: A distributor is arranged in the tank body (8) corresponding to the cold carrier inlet.

5. The charge-to-discharge thermally regenerative vertical phase change cold storage tank of claim 1, wherein: The cold storage plate (1) comprises a cold storage plate body, the cold storage plate body has a phase change cold storage material storage cavity, one end of the cold storage plate body is provided with a loading port, the upper and lower surfaces of the cold storage plate body are each provided with a plurality of mutually parallel flow guide grooves (2), a plurality of V-shaped protrusions (3) or arc protrusions are arranged on the surface of the cold storage plate body between the adjacent two flow guide grooves (2) and between the outermost flow guide groove (2) and the side edge of the body along the length direction.

6. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: The top of the tank body (8) is provided with an exhaust valve and a safety valve, the lowermost horizontal partition (9) is a grid plate, and the bottom of the tank body (8) is provided with a drain valve.

7. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: The bottom side wall of the tank body (8) is provided with a cold carrier inlet, and the top side wall of the tank body (8) is provided with a cold carrier outlet.

8. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: The phase change material filled in the cold storage plate (1) is a hydrated salt phase change material, and the cold carrier is water.

9. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: ​ 10. A charge-to-discharge thermally regenerative vertical phase change cold storage tank as claimed in claim 1, wherein: ​

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