A vertical phase change cold storage tank

Abstract

The utility model discloses a vertical phase change cold storage tank, including the jar body, the jar body comprises the jar top from top to bottom, the jar wall and jar bottom. The upper distributor is provided in the jar top, and the lower distributor is provided in the jar bottom, and the junction of jar top and jar wall is provided with the upper distribution orifice plate, and the junction of jar bottom and jar wall is provided with the lower distribution orifice plate. The second distributor and third distributor are provided in the jar wall from top to bottom, and the second distributor and third distributor all include upper orifice plate and lower orifice plate, and the support piece is arranged between upper orifice plate and lower orifice plate, and the opening of upper orifice plate and lower orifice plate is staggered arrangement. The bulk ice box is piled up in the jar wall. The utility model discloses the cold storage tank utilizes the bulk ice box of four around thin, and the middle thickening is in the fluid and relies on the dynamic self -balancing of buoyancy and gravity, can be free to stack and always keeps the horizontal attitude, solves the technical problem that traditional regular ice box must be fixed horizontally because of phase separation problem, and ice box installation cost greatly reduces, and improves jar body effective volume utilization.

Description

Technical Field

[0001] This utility model relates to the field of cold storage equipment technology, specifically to a vertical phase change cold storage tank. Background Technology

[0002] Phase change energy storage technology is widely used in commercial building air conditioning, industrial refrigeration, and cold chain logistics. Its core principle is to utilize the property of phase change materials (PCMs) to absorb or release a large amount of latent heat when they undergo a solid-liquid phase change at a specific temperature (phase change temperature). During periods of low electricity demand (such as at night), refrigeration equipment drives a low-temperature fluid to flow through the energy storage tank, causing the PCM inside the tank to condense and store the electrical energy as latent heat. During periods of high electricity demand (such as during the day), the operation of the refrigeration equipment is stopped or reduced, allowing a higher-temperature fluid on the load side to flow through the energy storage tank, triggering the PCM to melt and release heat, directly supplying cooling to the cooling system. This effectively transfers peak loads from the power grid and reduces electricity costs.

[0003] Vertical cold storage tanks have become the mainstream choice due to their significant advantages of small footprint and high cold storage density per unit space. Their core requirement is to overcome the phase separation problem that is common in PCMs. This problem means that traditional structured ice boxes must be placed strictly horizontally to avoid performance degradation. At the same time, it is necessary to solve the problems of complex installation caused by the horizontal stacking of ice boxes and the high manufacturing and installation costs caused by uneven flow field distribution inside the tank (often requiring multi-layer baffle structures). Utility Model Content

[0004] The purpose of this invention is to solve the technical problem of uneven cold storage / release of cold storage plates at different positions in existing phase change cold storage devices, and to provide a vertical phase change cold storage tank.

[0005] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a vertical phase change cold storage tank, comprising a tank body, which from top to bottom includes a tank top, a tank wall, and a tank bottom;

[0006] An upper distributor is installed inside the top of the tank, with the inlet of the upper distributor facing upwards.

[0007] A lower distributor is installed inside the bottom of the tank, with the outlet of the lower distributor facing downwards.

[0008] An upper perforated plate is provided at the junction of the tank top and the tank wall, and a lower perforated plate is provided at the junction of the tank bottom and the tank wall.

[0009] The tank wall is provided with a second distributor and a third distributor from top to bottom. Both the second distributor and the third distributor include an upper orifice plate and a lower orifice plate. A support member is provided between the upper orifice plate and the lower orifice plate, and the openings of the upper orifice plate and the lower orifice plate are staggered.

[0010] Bulk ice boxes are stacked between the upper distribution plate and the second distributor, between the second distributor and the third distributor, and between the third distributor and the lower distribution plate.

[0011] As a further optimization of the vertical phase change cold storage tank of this utility model: both the lower distributor and the upper distributor are made of plastic.

[0012] As a further optimization of the vertical phase change cold storage tank of this utility model: both the second distributor and the third distributor are made of plastic.

[0013] As a further optimization of the vertical phase change cold storage tank of this utility model: the upper perforated plate is made of plastic and the lower perforated plate is made of metal.

[0014] As a further optimization of the vertical phase change cold storage tank of this utility model: the support member is a support plate or a support tube.

[0015] As a further optimization of the vertical phase change cold storage tank of this utility model: the bulk ice box is an irregular rectangular hexahedral structure, and the thickness of the bulk ice box gradually decreases from the center to the periphery.

[0016] As a further optimization of the vertical phase change cold storage tank of this utility model: the ratio of the center thickness to the edge thickness of the bulk ice box is greater than 1.5.

[0017] As a further optimization of the vertical phase change cold storage tank of this utility model: a manhole is provided on the top of the tank.

[0018] As a further optimization of the vertical phase change cold storage tank of this utility model: a drain valve is provided at the bottom of the tank.

[0019] This utility model has the following beneficial effects:

[0020] I. The cold storage tank of this utility model utilizes bulk ice boxes that are thin on all sides and thickened in the middle to achieve dynamic self-balancing in the fluid by relying on buoyancy and gravitational torque. It can be stacked freely and always maintains a horizontal posture, which solves the technical problem that traditional regular ice boxes must be fixed horizontally due to phase separation. The installation cost of ice boxes is greatly reduced, and the effective volume utilization rate of the tank is improved.

[0021] II. The cold storage tank of this utility model uses a four-stage distributor to replace the physical baffle device with fluid dynamic redistribution, which eliminates the difference in flow velocity in the tank and reduces the flow resistance and pressure drop, thereby improving the cold release rate of the phase change material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a vertical cold storage tank.

[0023] Figure 2A schematic diagram of the second and third distributors;

[0024] Marked in the image:

[0025] 1. Tank body;

[0026] 101. Top of the tank;

[0027] 102. Tank wall;

[0028] 103. Bottom of the jar;

[0029] 2. Upper distributor;

[0030] 3. Lower distributor;

[0031] 4. Upper distribution perforated plate;

[0032] 5. Lower distribution perforated plate;

[0033] 6. Second distributor;

[0034] 7. Third distributor;

[0035] 8. Upper perforated plate;

[0036] 9. Lower perforated plate;

[0037] 10. Support components. Detailed Implementation

[0038] 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.

[0039] As shown in the figure: A vertical phase change cold storage tank includes a tank body 1, which comprises a top 101, a wall 102, and a bottom 103 from top to bottom. The wall 102 is a cylindrical 304 stainless steel tank with a diameter of 1-1.5m, a height of 3-4m, and a design pressure of 0.6MPa. The top 101 is an arc-shaped head with a DN200 manhole on one side of the center. The bottom 103 is an elliptical head with a DN50 drain valve.

[0040] An upper distributor 2 is installed inside the tank top 101. The upper distributor 2 has a water inlet and a water outlet pipe connected to the water inlet. The water outlet pipe extends out of the tank top 101. Water inlets are evenly distributed on the water inlet. The water inlets of the upper distributor 2 are set facing upwards.

[0041] A lower distributor 3 is installed inside the tank bottom 103. The lower distributor 3 has a water outlet and a water inlet pipe connected to the water outlet. The water inlet pipe extends out of the tank bottom 103. Water outlets are evenly distributed on the water outlet. The water outlets of the lower distributor 3 are set downwards.

[0042] Both the upper distributor 2 and the lower distributor 3 are made of PP plastic.

[0043] An upper distribution perforated plate 4 is provided at the junction of the tank top 101 and the tank wall 102, and a lower distribution perforated plate 5 is provided at the junction of the tank bottom 103 and the tank wall 102.

[0044] The upper perforated plate 4 is a PP plastic plate with a thickness of 10mm. It has φ8mm round holes evenly distributed on the plate, with an opening rate of 40-45%. The upper perforated plate 4 only serves the function of distribution.

[0045] The lower distribution perforated plate 5 is made of 316L stainless steel plate with a thickness of 12mm. It has φ10mm round holes evenly distributed on the plate, with an opening rate of 45%. The lower distribution perforated plate 5 serves both a distribution function and a support function.

[0046] The tank wall 102 is provided with a second distributor 6 and a third distributor 7 from top to bottom. Both the second distributor 6 and the third distributor 7 include an upper perforated plate 8 and a lower perforated plate 9. A support member 10 is provided between the upper perforated plate 8 and the lower perforated plate 9, and the openings of the upper perforated plate 8 and the lower perforated plate 9 are staggered.

[0047] Loose ice boxes are stacked between the upper distribution plate 4 and the second distributor 6, between the second distributor 6 and the third distributor 7, and between the third distributor 7 and the lower distribution plate 5.

[0048] Both the upper orifice plate 8 and the lower orifice plate 9 are made of PP plastic. The second distributor 6 and the third distributor 7 can rectify the flow in the height direction, so that the water is evenly distributed and in full contact with the bulk ice box.

[0049] The bulk ice boxes are irregular rectangular hexahedral structures (100mm×100mm×30mm), with a center thickness of 30mm that gradually decreases to 12mm towards the edges. The ice boxes are filled with phase change cold storage material. Several ice boxes are freely stacked in the three-section tank space (between the upper perforated plate 4 and the second distributor 6, between the second distributor 6 and the third distributor 7, and between the third distributor 7 and the lower perforated plate 5).

[0050] Cold storage stage (off-peak electricity at night): The refrigerant (water) is injected downwards from the lower distributor 3, flows to the bottom of the tank 103, and then diffuses upwards. The fluid passes sequentially through: the lower orifice plate 5 (first flow equalization), the third distributor 7 (upper and lower orifice plates are misaligned for flow guidance and deflection), the second distributor 6 (secondary flow field reconstruction), and the upper orifice plate 4 (outlet pre-flow equalization). The bulk ice box remains horizontal in the flow field. Cold release stage (peak electricity during the day): 12°C return water enters the cold storage tank from the upper distributor 2. The fluid flows through the cold storage box, and the water temperature drops to 7°C, completing the cold release.

[0051] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A vertical phase change cold storage tank, comprising a tank body (1), the tank body (1) comprising, from top to bottom, a tank top (101), a tank wall (102), and a tank bottom (103), characterized in that: An upper distributor (2) is provided inside the top of the tank (101), with the inlet of the upper distributor (2) facing upwards; A lower distributor (3) is provided inside the tank bottom (103), with the outlet of the lower distributor (3) facing downwards; An upper distribution perforated plate (4) is provided at the junction of the tank top (101) and the tank wall (102), and a lower distribution perforated plate (5) is provided at the junction of the tank bottom (103) and the tank wall (102). The tank wall (102) is provided with a second distributor (6) and a third distributor (7) from top to bottom. The second distributor (6) and the third distributor (7) both include an upper perforated plate (8) and a lower perforated plate (9). A support member (10) is provided between the upper perforated plate (8) and the lower perforated plate (9), and the openings of the upper perforated plate (8) and the lower perforated plate (9) are staggered. Bulk ice boxes are stacked between the upper distribution perforated plate (4) and the second distributor (6), between the second distributor (6) and the third distributor (7), and between the third distributor (7) and the lower distribution perforated plate (5).

2. The vertical phase change cold storage tank as described in claim 1, characterized in that: Both the lower distributor (3) and the upper distributor (2) are made of plastic.

3. A vertical phase change cold storage tank as described in claim 1, characterized in that: Both the second distributor (6) and the third distributor (7) are made of plastic.

4. A vertical phase change cold storage tank as described in claim 1, characterized in that: The upper perforated plate (4) is made of plastic, and the lower perforated plate (5) is made of metal.

5. A vertical phase change cold storage tank as described in claim 1, characterized in that: The support member (10) is a support plate or a support tube.

6. A vertical phase change cold storage tank as described in claim 1, characterized in that: The bulk ice box has an irregular rectangular hexahedral structure, and the thickness of the bulk ice box gradually decreases from the center to the periphery.

7. A vertical phase change cold storage tank as described in claim 6, characterized in that: The ratio of the center thickness to the edge thickness of the bulk ice box is greater than 1.

5.

8. A vertical phase change cold storage tank as described in claim 1, characterized in that: A manhole is provided on the top of the tank (101).

9. A vertical phase change cold storage tank as described in claim 1, characterized in that: A drain valve is provided at the bottom of the tank (103).

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