阅读说明：本技术 一种蓄冷罐 (Cold storage tank ) 是由 白松泉 高健 白欣萌 黄宏利 于 2021-08-27 设计创作，主要内容包括：本发明涉及工业设备领域,具体涉及一种蓄冷罐。所述蓄冷罐包括：罐体；第一相变液输入总管,用于将来自外界的第一相变液引入所述蓄冷罐中；第一相变液输出总管,用于将换热后的相变液输出到外界；以及,若干第一相变液分管,所述第一相变液分管的入口与所述第一相变液输入总管相连,所述第一相变液分管的出口与所述第一相变液输出总管相连,用于增大所述第一相变液在所述蓄冷罐中进行热交换的接触面积。本发明的蓄冷罐能够耐受更低的极低温冷源所带来的瞬时冷能,并且本发明能够灵活调节蓄冷罐中发生热交换的两种流体的量,从而能够较为精确地控制热交换的程度、出口的流体温度,从而能够适用于各种流量各种温度要求的情况。(The invention relates to the field of industrial equipment, in particular to a cold accumulation tank. The cold storage tank includes: a tank body; the first phase-change liquid input header pipe is used for introducing the first phase-change liquid from the outside into the cold storage tank; the first phase change liquid output header pipe is used for outputting the phase change liquid subjected to heat exchange to the outside; and a plurality of first liquid branch pipes that change phase, the entry of first liquid branch pipe that change phase with first liquid input house steward links to each other, the export of first liquid branch pipe that change phase with first liquid output house steward links to each other, is used for the increase first liquid that change phase is in carry out the area of contact of heat exchange in the cold storage tank. The cold accumulation tank can bear the instantaneous cold energy brought by a lower extremely-low-temperature cold source, and the quantity of two fluids subjected to heat exchange in the cold accumulation tank can be flexibly adjusted, so that the degree of heat exchange and the temperature of the fluid at an outlet can be accurately controlled, and the cold accumulation tank can be suitable for the conditions with various flow and temperature requirements.)

1. A cold storage tank, comprising:

a tank body;

the first phase-change liquid input header pipe is used for introducing the first phase-change liquid from the outside into the cold storage tank;

the first phase change liquid output header pipe is used for outputting the phase change liquid subjected to heat exchange to the outside; and the number of the first and second groups,

the inlet of the first phase-change liquid branch pipe is connected with the first phase-change liquid input main pipe, and the outlet of the first phase-change liquid branch pipe is connected with the first phase-change liquid output main pipe and used for increasing the contact area of the first phase-change liquid for heat exchange in the cold storage tank;

for one first phase-change liquid branch pipe, the pattern area ratio is 5-20%, and the pattern area ratio is the percentage of the projection area of the first phase-change liquid branch pipe on the arrangement plane to the cross-sectional area of the arrangement plane with the inner wall of the tank body as the side.

2. Cold storage tank according to claim 1, characterized in that the distance of separation between the first phase-change liquid partial tubes is 10-20 cm, preferably 12-16 cm.

3. The cold storage tank according to claim 1, wherein the tube diameter of the first phase-change liquid branch tube is 6mm to 32mm, preferably 20mm to 28 mm.

4. A cold storage tank according to claim 2 or 3, wherein each of the first phase-change liquid partial tubes is arranged in a pattern on one plane, and a plurality of the phase-change liquid partial tubes are parallel to each other; preferably, the pattern of the phase-change liquid distribution pipe is a spiral pattern or a serpentine coil pattern.

5. Cold storage tank according to claim 1, characterized in that the pattern area ratio is 8-16%, preferably 10-14%.

6. The cold storage tank of claim 1, further comprising: and a first valve is arranged at the joint of the first phase-change liquid branch pipe and the phase-change liquid input main pipe.

7. The cold storage tank of claim 1, further comprising a fluid inlet and a fluid outlet for circulating a second phase-change fluid in heat exchange relationship with the first phase-change fluid.

8. The cold storage tank as claimed in claim 1, further comprising an upper stage temperature detection port and/or a lower stage temperature detection port.

9. The cold storage tank of claim 1, further comprising at least one of a phase change liquid leakage detection port, a liquid level gauge port, a vent port, and a manhole.

10. The cold storage tank according to claim 1, wherein said cold storage tank is a cold storage tank for a very low temperature cold source of-120 ℃ to-170 ℃.

Technical Field

The invention relates to the field of industrial equipment, in particular to a cold accumulation tank.

Background

The cold storage technology can transfer the low temperature of fluid in one link in the system to the secondary refrigerant through heat exchange, the secondary refrigerant stores absorbed cold energy through the change from liquid state to solid state, and latent heat is released through the liquid circulation of the secondary refrigerant when the tail end system needs to be cooled. By the method, the energy in the system is recycled, the resource waste and energy loss caused by heat exchange through an external object source are saved, and the cost is reduced.

However, the existing cold storage tank is usually used for a low-temperature cold source with a temperature of minus twenty-three degrees at the lowest, and cannot tolerate the instant cold energy brought by the cold source with a lower temperature (for example, 100 ℃ below zero or even lower), which often causes that the coolant is completely changed into a solid phase rapidly and cannot continue to operate, and even causes the damage of the whole cold storage tank. Therefore, the prior art can not realize the recycling of the ultralow temperature cold energy, and the great waste of the high-quality cold source is caused.

Therefore, it is necessary to develop a new cold storage tank capable of being applied to a very low temperature cold source.

Disclosure of Invention

The invention aims to solve the problem that the existing cold storage tank cannot bear instantaneous cold energy, and provides a novel cold storage tank. The cold accumulation tank can bear an extremely low temperature cold source (particularly suitable for being used as the cold accumulation tank of the extremely low temperature cold source with the temperature of minus 120 ℃ to minus 170 ℃), and can be flexibly suitable for the conditions with various working condition requirements.

In order to achieve the above object, a first aspect of the present invention provides a cold storage tank comprising: a tank body; the first phase-change liquid input header pipe is used for introducing the first phase-change liquid from the outside into the cold storage tank; the first phase change liquid output header pipe is used for outputting the phase change liquid subjected to heat exchange to the outside; the inlet of the first phase-change liquid branch pipe is connected with the first phase-change liquid input main pipe, and the outlet of the first phase-change liquid branch pipe is connected with the first phase-change liquid output main pipe and used for increasing the contact area of the first phase-change liquid for heat exchange in the cold storage tank; for one first phase-change liquid branch pipe, the pattern area ratio is 5-20%, and the pattern area ratio is the percentage of the projection area of the first phase-change liquid branch pipe on the arrangement plane to the cross-sectional area of the arrangement plane with the inner wall of the tank body as the side.

In one example, the first phase-change liquid distribution pipes are spaced apart by a distance of 10cm to 20 cm.

In one example, the first phase-change liquid distribution pipe has a pipe diameter of 6-32 mm.

In one example, each of the first phase-change liquid sub-tubes is arranged in a pattern on one plane, and a plurality of the phase-change liquid sub-tubes are parallel to each other; preferably, the pattern of the phase-change liquid distribution pipe is a spiral pattern or a serpentine coil pattern.

In one example, the pattern area ratio is 8 to 16%, preferably 10 to 14%.

In one example, the cold storage tank further comprises: and a first valve is arranged at the joint of the first phase-change liquid branch pipe and the phase-change liquid input main pipe.

In one example, the cold storage tank further comprises a fluid inlet and a fluid outlet for circulating a second phase-change fluid in heat exchange relationship with the first phase-change fluid.

In one example, the cold storage tank further comprises an upper section temperature detection port and/or a lower section temperature detection port.

In one example, the cold storage tank further comprises at least one of a phase change fluid leakage detection port, a liquid level gauge port, a vent port, and a manhole.

In one example, the cold storage tank is a cold storage tank for a very low temperature cold source of minus 120 ℃ to minus 170 ℃.

The cold accumulation tank based on the specific structure can resist the transient cold energy released irregularly, can resist the very low temperature cold source with lower temperature (can easily resist the cold energy brought by the conventional low temperature cold source with the temperature of minus 10-30 ℃, and can further resist the transient cold energy brought by the very low temperature cold source with the temperature of minus 120-minus 170 ℃), and can flexibly adjust the quantity of two fluids subjected to heat exchange in the cold accumulation tank, so that the degree of heat exchange and the temperature of the fluid at an outlet can be accurately controlled, and the cold accumulation tank can be suitable for the conditions with various flow and temperature requirements.

Drawings

Fig. 1 is a schematic diagram of an external view of an accumulator tank according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a longitudinal section of a cold storage tank provided in an embodiment of the present invention, the cold storage tank being longitudinally sectioned from a central axis.

Fig. 3 is a plan view from the section a-a in fig. 2 looking down.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The cold storage tank of the present invention is exemplified below with reference to fig. 1, 2 and 3.

Fig. 1 is a schematic diagram showing an external view of a cold storage tank according to an embodiment, fig. 2 is a schematic diagram showing a longitudinal section of the cold storage tank of fig. 1, the longitudinal section being a longitudinal section taken in a direction parallel to a paper surface along a central axis Z, and fig. 3 is a plan view taken from a section a-a in fig. 2, the plan view being taken downward.

As shown in fig. 1 and 2, a cold storage tank according to an example includes: a tank 101; a first phase-change fluid input manifold 102, which may be disposed on the central axis of the cold storage tank, into which a first phase-change fluid (usually in a liquid state) from the outside is introduced; a first phase-change liquid output header pipe 106, which can be disposed inside the tank body and close to the inner wall of the tank body, and is used for outputting the phase-change liquid (usually in a gaseous state) after heat exchange to the outside; and a plurality of first phase change liquid branch pipes 201, the entry of first phase change liquid branch pipe 201 with first phase change liquid input manifold 102 links to each other, the export of first phase change liquid branch pipe 201 with first phase change liquid output manifold 106 links to each other for the increase first phase change liquid is in carry out heat exchange's area of contact in the cold storage tank.

The inventor of the present invention found that the existing cold storage tank can usually bear a low temperature cold source of minus several tens degrees (typically minus twenty-three degrees), but when a lower temperature cold source (for example, reaching minus 150 ℃) is developed and needs to be put into use, the existing cold storage tank can hardly bear the instantaneous cold energy, and the instantaneous cold energy can be instantly changed into a solid phase, so that the whole equipment is irreversibly damaged. For this reason, in addition to the device material and the cooling liquid (phase change liquid), the design of the internal structure of the cold storage tank is also an important factor that makes it unable to withstand the instantaneous cooling energy.

In the present invention, for convenience of description, a cold source having a temperature higher than-100 ℃ is referred to as a "low-temperature cold source", and a cold source having a temperature lower than-100 ℃ is referred to as an "extremely low-temperature cold source".

In order to enable the cold accumulation tank to bear the extremely low temperature cold source lower than minus 150 ℃, the inventor redesigns the structure of the cold accumulation tank and proposes the scheme of the invention.

In the cross section, the present invention defines the term "pattern area ratio", which is the percentage of the projected area of the first phase-change liquid distribution pipe 201 on the arrangement plane (i.e., the area of the spiral pipe in fig. 3) to the cross-sectional area of the arrangement plane (i.e., the area of the circle of the tank 101 in fig. 3) with the inner wall of the tank as the side, as shown in fig. 3. The pattern area ratio may be selected in a wide range of 5-20%. In order to achieve both storage of a larger volume of the fluid to be heat-exchanged in the cold storage tank and securing of a higher heat exchange efficiency, the pattern area ratio is preferably 8 to 16%, more preferably 10 to 14%. The inventors of the present invention have found that the purpose of "achieving heat exchange sufficiently" and the purpose of "controlling the heat exchange rate so as not to cause rapid cooling shock" can be effectively achieved at the same time by controlling the pattern area ratio within an appropriate range.

The first phase-change liquid distribution pipes 201 of the present invention are arranged in parallel with each other, for example, as shown in fig. 2.

As shown in fig. 2, in one embodiment, the inlets of all the first phase-change liquid branch pipes 201 are connected to the first phase-change liquid input manifold 102, and the outlets of all the first phase-change liquid branch pipes 201 are connected to the first phase-change liquid output manifold 106, so that each of the first phase-change liquid branch pipes 201 is relatively independent and is convenient to be controlled separately.

It should be noted that the "tube" of the first phase-change liquid distribution tube 201 is only used to illustrate that it has a housing and a cavity, and a mobile phase can flow through the cavity, and is not limited to a circular cross section. The cross-section of the first phase-change liquid distribution pipe 201 may be various shapes such as a circle, a rectangle, an irregularity, etc. The circular cross-section in fig. 2 and 3 is by way of example only. In addition, different forms of heat exchange fins can be arranged outside the tube.

In one example, the interval distance between the first phase-change liquid distribution pipes is controlled to be not less than 8 cm.

In the present invention, the term "separation distance" refers to the shortest straight distance between adjacent outer walls (not between central axes). Specifically, the interval distance between the first phase-change liquid branch pipes includes: on one hand, for different first phase-change liquid branch pipes, the spacing distance is required to be met during arrangement; on the other hand, the same phase change liquid manifold also satisfies the spacing distance when coiled in a pattern.

In a more preferred embodiment, the first phase-change liquid distribution pipes are spaced apart by a distance of 10cm to 20cm, more preferably 12cm to 16 cm. The separation distance can withstand rapid solidification of the second phase-change fluid and can make room for the flow of the second phase-change fluid that is still in a liquid state.

In a preferred example, the pipe diameter of the first phase-change liquid branch pipe is 6mm-32 mm; more preferably 20mm to 28 mm; more preferably 21mm to 25 mm.

The inventors of the present invention have recognized that the size of the phase-change liquid branch pipe is very important for the purpose of simultaneously satisfying the "sufficient heat exchange" and the "controlling the heat exchange rate so as not to generate the shock of quenching too fast", and should be satisfied in any volume of the can body, which may easily cause the damage of the can body or cause the insufficient heat exchange. However, this problem has never been appreciated by the prior art. The inventor of the present invention has conducted intensive studies to determine the size of the first phase change liquid distribution pipe, i.e. the aforementioned spacing distance and pipe diameter, which can be particularly suitable for the extremely low temperature cold source of 120 ℃ below zero to 170 ℃ below zero. The above object can be achieved to some extent when the size of the first phase-change liquid branch pipe can satisfy the above basic range, and in a preferable range, the above can be achieved more favorably.

Under the using state of the cold storage tank, at least two phase-change liquids exist, namely a first phase-change liquid and a second phase-change liquid. The first phase-change liquid exists in the first phase-change liquid series pipeline (including all the first phase-change liquid branch pipes 201, the first phase-change liquid input header pipe 102 and the first phase-change liquid output header pipe 106), and phase change of a liquid phase (at a relatively low temperature) and a gas phase (at a relatively high temperature) is completely or partially performed; the second phase-change fluid exists in the tank body 101, at least part of the first phase-change fluid series pipeline is immersed, phase change between a liquid phase (at a relatively high temperature) and a solid phase (at a relatively low temperature) occurs, normally, when the second phase-change fluid undergoes phase change from the liquid phase to the solid phase, solid condensation can be generated on the outer wall of the pipeline, but the separation distance between the pipelines cannot be completely blocked, so that the second phase-change fluid can still flow in the cold storage tank.

In the present invention, the term "phase change liquid" refers only to a specific medium, and does not limit the existence form thereof. It is understood that the phase change fluid may be present in a variable form, either solid, liquid or gaseous. The "phase-change liquid" as referred to in the present invention is not limited to a liquid state, and may be in various forms.

In a specific embodiment, in the using state of the cold storage tank, the first phase-change fluid is communicated with the outside, the first phase-change fluid from the outside firstly enters the first phase-change fluid input header pipe 102, moves along the first phase-change fluid input header pipe 102 from bottom to top, and enters a plurality of first phase-change fluid branch pipes 201 which are connected in parallel and are in a communicated state (a first valve at the joint of the first phase-change fluid input header pipe 102 and the first phase-change fluid branch pipes 201 is opened); the first phase-change liquid mainly exchanges heat in the first phase-change liquid branch pipe 201, enters the first phase-change liquid output header pipe 106, and is collected and leaves the cold storage tank. The second phase-change fluid is present in the tank 101, submerging all or at least part of the first phase-change fluid sub-pipe 201; the second phase-change fluid undergoes a phase change between a liquid phase and a solid phase. The liquid first phase-change liquid with lower temperature from the outside exchanges heat with the second phase-change liquid in the tank, the temperature of the first phase-change liquid rises, at least part of the first phase-change liquid is changed from the liquid state to the gas state, the temperature of the second phase-change liquid is reduced, at least part of the second phase-change liquid is changed from the liquid state to the solid state, and therefore cold energy brought by the first phase-change liquid is stored in the second phase-change liquid.

In order to increase the contact area between the first phase-change liquid branch pipe 201 and the second phase-change liquid in the tank, the first phase-change liquid branch pipe 201 may be coiled into a pattern, a three-dimensional pattern, or a planar pattern. In the example shown in fig. 2, the first phase-change liquid sub-tubes 201 are wound in a planar pattern, and planes in which a plurality of the first phase-change liquid sub-tubes 201 are located are parallel to each other.

The pattern of the first phase-change liquid distribution pipe 201 is not limited, and the patterns of the different first phase-change liquid distribution pipes 201 are not necessarily the same. As shown in fig. 3, the first phase-change liquid distribution pipe is arranged in a spiral pattern, a serpentine coil pattern, or the like.

The plane on which the first phase-change liquid branch pipes 201 are arranged and the first phase-change liquid input header pipe can be placed at an angle or perpendicular to each other. In one example as shown in fig. 2, all the first phase-change liquid branch pipes are arranged in a plane perpendicular to the first phase-change liquid input manifold.

The plane on which the first phase-change liquid branch pipes are arranged and the first phase-change liquid output header pipe 106 can be obliquely arranged or can be perpendicular to each other. In one example as shown in fig. 2, all the first phase-change liquid branch pipes are arranged in a plane perpendicular to the first phase-change liquid output header pipe.

In one example, the cold storage tank further includes a supporting fixture 202 for supporting and fixing the first phase-change liquid distribution pipe 201. The supporting and fixing members may be provided in the form of a plurality of right-angle bars, which are arranged in a direction parallel to the central axis of the tank body, as shown in fig. 2 and 3. This kind of mode can alleviate the body of rod dead weight, reduce the body of rod volume and can play firm supporting role. The support fixture 202 may be provided in other alternative forms that can provide both a fixing and a supporting function.

The area of the first phase-change liquid in the cold storage tank exchanging heat with the fluid in the tank is greatly related to the distribution area of the first phase-change liquid branch pipe 201.

In the longitudinal section where the central axis is located, as shown in fig. 2, the cold storage tank is divided into an H1 th region where the first phase-change liquid branch pipe is located, an H2 th region located above the first phase-change liquid branch pipe region, and an H3 th region located below the first phase-change liquid branch pipe region in terms of height.

The volume of the cold storage tank can be selected according to specific working conditions. Generally, the maximum volume V1 of the second phase-change fluid under various operating conditions may be determined, and then the maximum temperature-difference expansion volume V2 of the second phase-change fluid (the V2 is not the expanded volume but the difference between the expanded volume and the original volume) may be determined, and the storage volume of the cold storage tank (i.e., the volume capable of storing the second phase-change fluid) may be 1.2 to 1.3 times the sum of V1 plus V2. Among them, the H3 plus H1 region may be able to contain a volume of the second phase-change fluid that is approximately equivalent to 1 to 1.3 times of V1, and the H2 region may be able to contain a volume of the second phase-change fluid that is approximately equivalent to 1.2 to 1.3 times of V2.

The number of the first phase-change liquid branch pipes can be selected according to specific working conditions. Generally, the maximum phase change heat exchange amount of the first phase change liquid under various operating conditions can be determined, then the phase change heat exchange amount of each first phase change liquid branch pipe can be measured and calculated, and then the number of the first phase change liquid branch pipes 201 is selected so that all the first phase change liquid branch pipes 201 can meet the requirements of phase change cold energy release and recovery.

Therefore, the cold accumulation tank can meet the requirements of various operation conditions. Not only can bear the situation of the maximum flow, but also has a proper amount of redundancy to deal with the unexpected situation; and when the actual flow (the first phase-change liquid and/or the second phase-change liquid) only occupies the part of the maximum flow, the liquid level of the second phase-change liquid in the cold storage tank and/or the utilization rate of the first phase-change liquid branch pipe can be adjusted by adjusting the switch of the valve, so that the equipment meets the flow requirement on one hand, and the heat exchange process has good controllability on the other hand, and the temperature of a fluid outlet can be controlled.

In an example, the first phase-change liquid output header pipe 106 is disposed inside the tank body and near the inner wall of the tank body, and is connected to an outlet of the first phase-change liquid branch pipe 201, so as to output the first phase-change liquid after heat exchange to the outside.

In one example, the cold storage tank further comprises: a first valve (not shown in the figure) is arranged at the connection position of the first phase-change liquid branch pipe 201 and the first phase-change liquid input header pipe 102, and is used for controlling the utilization rate of the first phase-change liquid branch pipes in all the first phase-change liquid branch pipes 201. In one application, all or part of the first phase-change liquid branch pipes 201 immersed below the liquid level of the fluid in the tank body of the cold storage tank are used, i.e. the first valves are open, while those first phase-change liquid branch pipes 201 above the liquid level are in a standby state, i.e. the first valves are closed.

In one example, the cold storage tank may further include: a second valve (not shown in the figure) is arranged at the intersection of the first phase-change liquid branch pipe 201 and the first phase-change liquid output header pipe 106, and is used for controlling the utilization rate of the first phase-change liquid branch pipes in all the first phase-change liquid branch pipes 201. In one application, all or part of the first phase-change liquid branch pipes 201 immersed below the liquid level of the fluid in the tank body of the cold storage tank are used, i.e. the second valves are open, while those first phase-change liquid branch pipes 201 above the liquid level are in a standby state, i.e. the second valves are closed.

The first valve and the second valve can be simultaneously arranged, also can be only arranged, and also can be only provided with a part of first phase change liquid branch pipes, the first valve and/or the second valve can both play a role in adjusting the utilization rate of the first phase change liquid branch pipes.

In one example, the first valve is controlled by a controller.

In one example, the second valve is controlled by a controller.

The cold storage tank may also include sensors, transmitters, etc. when controlled by the controller.

In an example, the cold storage tank further includes a second phase-change fluid inlet 103 and a second phase-change fluid outlet 104 for inputting and outputting the second phase-change fluid. In one example, the second phase-change fluid outlet 104 is located at the bottom of the tank 101 and the second phase-change fluid inlet 103 (see fig. 3, where the second phase-change fluid inlet 103 is blocked by the first phase-change fluid output manifold 106 in fig. 2) is located on a sidewall of the tank.

As shown in fig. 3, in one example, the direction in which the second phase-change fluid inlet 103 cuts into the tank 101 is parallel to the tangential direction.

The shape of the can 101 is not particularly limited, and the can shown in fig. 1 and 2 has a cylindrical-like shape (barrel-like shape), but the can may have various other shapes, such as a rectangular parallelepiped shape (box-like shape) and the like.

In the present invention, when a "class" is preceded by a shape, it is intended that the geometry may not be standard, and those skilled in the art will recognize that the shape conforms to the basic geometry, i.e., to the scope of the present invention.

The cold storage tank of the present invention may also include other accessories as are common in the art. The fittings shown in fig. 1 to 3 are given below as examples only.

In one example, as shown in fig. 2, the cold storage tank further includes an upper section temperature sensing port 110 for sensing an upper fluid temperature.

In one example, as shown in fig. 2, the cold storage tank further includes a lower section temperature detection port 111 for detecting a lower fluid temperature.

The cold storage tank may further include more temperature detection ports (not shown in the drawings). These temperature sensing ports may be dials or sensors (which transmit the temperature to the control center in digital form).

In fig. 3, the can body external parts such as the upper stage temperature detection port 110 and the lower stage temperature detection port 111 are not shown.

In one example, the cold storage tank further comprises a support member 112 for supporting the H2 th region, which may be, for example, a diagonal bracing angle as shown in fig. 1.

In one example, the cold storage tank further includes an anti-iron plate 113 provided near the second phase-change liquid inlet 103 for buffering the flow rate of the second phase-change liquid.

In one example, the cold storage tank further includes a phase change fluid leak detection port 105 for shutting down the device in time when a leak occurs.

In one example, as shown in FIG. 2, the cold storage tank further includes a level gauge port 107 for sensing the level of liquid in the cold storage tank.

In one example, as shown in FIG. 2, the cold storage tank further includes an air bleed port 108 for pressure equalization within the tank body.

In one example, as shown in fig. 2, the cold storage tank further includes a manhole 109 for access during servicing of the cold storage tank.

The cold storage tank provided by the embodiment of the invention can resist the transient cold energy released at irregular intervals, can resist a lower extremely-low temperature cold source (for example, the temperature can reach below-30 ℃, even below-100 ℃, even below-160 ℃), can still ensure the normal operation of the cold storage tank, and can keep the phase change liquid in the pipe and the phase change liquid outside the pipe to flow to a certain degree. The cold energy can be fully stored, and the cold accumulation tank is not damaged.

The cold accumulation tank provided by the embodiment of the invention has high heat exchange efficiency, can meet the requirements under various operation conditions on the premise that only one cold accumulation tank is arranged in one unit, flexibly adjusts the amount of the fluid to be cooled entering the cold accumulation tank, and also can adjust the amount of the first phase-change liquid entering the cold accumulation tank, so that the degree of heat exchange and the temperature of the fluid at an outlet can be accurately controlled, and the cold accumulation tank can be suitable for the conditions of various flow and temperature requirements.

According to one embodiment, the cold storage tank of the present invention may be sized to include:

(1) the first phase-change liquid branch pipe:

the pipe diameter of the first phase-change liquid branch pipe is 6mm-32mm (preferably 20mm-28mm, more preferably 21mm-25mm), and the coiling interval is 10cm-20cm (preferably 12cm-16 cm);

the number of the first phase change liquid branch pipes is 20-40; are connected with the first phase-change liquid input header pipe and the first phase-change liquid output header pipe and are arranged up and down at the same interval distance in the vertical direction, and the interval distance in the vertical direction is 10cm-20cm (preferably 12cm-16 cm).

(2) First phase change liquid header pipe

The pipe diameter of the first phase-change liquid input manifold 102 is 60mm-100mm (preferably 70mm-90mm, more preferably 75mm-85 mm);

the pipe diameter of the first phase-change liquid output manifold 106 is 120mm-180mm (preferably 130mm-170mm, more preferably 140mm-160 mm).

(3) The size of the tank body is as follows:

the diameter of the tank is 2m-5m, the height of the tank is 5m-12m (preferably 7m-10m), wherein H3: h1: h2 is 1, (2-3), (1.5-2).

The present invention will be described in detail below by way of examples. The described embodiments of the invention are only some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following example uses the cold storage tank of the structure shown in fig. 1 to 3.

Example 1

The size of the cold storage tank comprises:

(1) first phase-change liquid branch pipe 201:

coiling the first phase change liquid into a spiral pattern shown in fig. 3 in a branched pipe mode, wherein the pipe diameter is 25mm, and the coiling interval distance is 150 mm;

the number of the first phase-change liquid branch pipes is 26; all are connected with first phase transition liquid input manifold and output manifold to arrange from top to bottom at the same interval distance of vertical direction, the interval distance of this vertical direction is 150 mm.

(2) First phase change liquid header pipe

The pipe diameter of the first phase-change liquid input header pipe 102 is 80 mm;

the pipe diameter of the first phase-change liquid output manifold 106 is 150 mm.

(3) The size of the tank body is as follows:

the diameter of the can body is 3000mm, and the height of the can body is 8850mm (wherein H3 is 1400mm, H1 is 3750mm, and H2 is 2500 mm).

Example 2a

The pipe diameter of the first phase-change liquid branch pipe of the cold storage tank is 21mm, and other parameters (including other parameters of the first phase-change liquid branch pipe, the first phase-change liquid main pipe and the size parameter of the tank body) are the same as those in embodiment 1.

Example 2b

The pipe diameter of the first phase-change liquid branch pipe of the cold accumulation tank is 10mm, and other parameters are the same as those of the embodiment 1.

Example 3a

The interval distance between the coils of the first phase-change liquid branch pipe of the cold storage tank is 140mm, the interval distance in the vertical direction is 140mm, and other parameters are the same as those of embodiment 1.

Example 3b

The interval distance between the windings of the first phase-change liquid distribution pipe of the cold storage tank was 160mm, the interval distance in the vertical direction was 160mm, and other parameters were the same as those of embodiment 1.

Example 3c

The interval distance between the coils of the first phase-change liquid branch pipe of the cold accumulation tank is 90mm, the interval distance in the vertical direction is 90mm, and other parameters are the same as those in embodiment 1.

Example 3d

The interval distance between the windings of the first phase-change liquid branch pipe of the cold storage tank was 220mm, the interval distance in the vertical direction was 220mm, and other parameters were the same as those of embodiment 1.

Test example

The following tests were respectively performed in the cold storage tanks of the above-described examples:

(1) phase change liquid

A second phase-change liquid is stored between the tank body of the cold storage tank and the first phase-change liquid branch pipe 201, the height of the second phase-change liquid is just to submerge all the first phase-change liquid branch pipes 201, the second phase-change liquid is subjected to phase change between a liquid phase and a solid phase, and the phase change point is-32 ℃;

introducing a first phase change liquid into the first phase change liquid main pipe and the branch pipes, wherein the phase change liquid is subjected to phase change between a liquid phase and a gas phase, and the phase change point is-163 ℃;

the initial state of the second phase change liquid in the cold storage tank is liquid phase, and the initial temperature is-25 ℃;

the initial state of the first phase change liquid introduced into the cold storage tank is a liquid phase, and the initial temperature is-163 ℃.

(2) Operation of

The first phase change fluid was introduced into the cold storage tanks of the above-described examples at a flow rate of 7.2T/day, respectively.

(3) The phenomenon in each cold storage tank was observed and is shown in table 1.

TABLE 1

It can be seen from table 1 that the pipe diameter and the spacing distance (especially in the preferred range) of the first phase-change liquid branch pipe of the present invention can smoothly bear the quenching brought by the first phase-change liquid with more than 160 degrees below zero, so as to ensure the normal operation of the cold storage tank, and can ensure sufficient heat exchange, the first phase-change liquid leaving the cold storage tank is all gas, the second phase-change liquid in the tank body is partially converted into solid phase, and a proper amount of liquid phase is still kept flowing.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defining "first", "second" may explicitly or implicitly include at least one such feature.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.