CN216592932U - Branch type fin type phase change heat exchanger for heat exchange enhancement - Google Patents

Abstract

The utility model discloses a branch type fin formula phase change heat exchanger for strengthening heat transfer, including inner tube and outer tube, the inner tube penetrates in the outer tube, the inner tube with be provided with the phase change material section between the outer tube, the welding has V-arrangement main fin on the outer wall of inner tube, side fin has all been welded to the both sides of V-arrangement main fin, the V-arrangement main fin with side fin all inserts the phase change material section, just side fin slope welding is in on the V-arrangement main fin. The utility model discloses, constitute arborescent fin through setting up V-arrangement main fin and side fin to insert in the phase change material section, thereby improved the heat transfer area of hot-fluid and phase change material section, thereby improved heat transfer rate, accelerate whole heat accumulation process, and through arborescent fin, can make the even diffusion of heat to the phase change material section, thereby improve the homogeneity of phase change material section temperature everywhere.

Description

A dendritic fin type phase changer for enhanced heat exchange

technical field

The utility model relates to the technical field of heat storage heat exchangers. Specifically, it is a dendritic fin type phase-change heat exchanger for strengthening heat exchange.

Background technique

In order to solve the problem of energy mismatch in time and space, energy storage technology is developing rapidly, among which latent heat storage has been widely studied because of its high energy storage density.

Latent heat storage mainly uses heat exchange fluid and phase change material to exchange heat, so as to achieve the purpose of heat storage. After the heat absorption and melting of the change material to a certain amount, natural convection will occur, resulting in a significantly higher heat storage rate in the upper part of the heat storage part than in the lower part, resulting in uneven heat storage of the phase change material in the circumferential direction. A certain temperature difference will also have a certain impact on the heat storage equipment of the equipment.

Utility model content

Therefore, the technical problem to be solved by the present invention is to provide a dendritic fin type phase changer for enhancing heat exchange, which improves heat exchange efficiency and temperature uniformity.

In order to solve the above-mentioned technical problems, the present utility model provides the following technical solutions: a dendritic fin type phase-change heat exchanger for strengthening heat exchange, comprising an inner tube and an outer tube, and the inner tube penetrates into the outer tube , a phase change material section is arranged between the inner tube and the outer tube, a V-shaped main fin is welded on the outer wall of the inner tube, and side fins are welded on both sides of the V-shaped main fin , the V-shaped main fins and the side fins are inserted into the phase change material segment, and the side fins are obliquely welded on the V-shaped main fins.

In the above-mentioned branch-type fin type phase changer for strengthening heat exchange, the V-shaped main fin includes two fin plates, and the first ends of the two fin plates are welded to each other to form a V-shape It is welded with the outer wall of the inner tube, and the side fins are welded on the sides of the two fin plates away from each other.

The above-mentioned branch-type finned phase changer for strengthening heat exchange, the angle between the two fin plates is 45°, and the angle bisector of the two fin plates is along the The diameter direction of the outer tube is set.

In the above-mentioned dendritic fin type phase changer for strengthening heat exchange, the first ends of the side fins are welded to the middle position of the side walls of the fin plates, and the first ends of the side fins are welded at the middle position of the side walls of the fin plates. The two ends are close to the second end of the fin plate, and the angle between the side fin and the fin plate is 45°.

In the above-mentioned branch-type finned phase change heat exchanger for strengthening heat exchange, the fin plate and the side fins are made of copper plate, and the inner tube is a copper tube.

In the above-mentioned dendritic-finned phase-change heat exchanger for strengthening heat exchange, the outer tube is a stainless steel tube, and the outer wall of the outer tube is wrapped with a thermal insulation layer.

The technical scheme of the present utility model has achieved the following beneficial technical effects:

1. In this utility model, the V-shaped main fins and the side fins are arranged to form dendritic fins and inserted into the phase change material section, thereby increasing the heat exchange area between the thermal fluid and the phase change material section, thereby increasing the The heat exchange rate accelerates the entire heat storage process, and through the dendritic fins, the heat can be evenly diffused to the phase change material section, thereby improving the temperature uniformity of the phase change material section; V-shaped with an included angle of 45° The main fins and the side fins set at 45° can make the rate of heat storage and release in the best state.

2. The utility model, by setting the V-shaped main fins and the side fins, can firstly heat all parts of the phase change material section uniformly, so that the heat exchange reaction of the phase change material section tends to be uniform and stable, reducing the temperature difference and slowing down the natural environment. The generation of convection, and secondly, when natural convection occurs, the V-shaped main fins and side fins protrude outward to block the flow of the phase change material, slow down the natural convection, and make the phase change material flow. The flow around the change material improves the mixing effect of the phase change material at different temperatures, so as to achieve the purpose of uniform temperature.

Description of drawings

1 is a schematic diagram of the three-dimensional structure of the present utility model;

Figure 2 is a schematic side view of the structure of the present utility model;

FIG. 3 is a schematic structural diagram of the welding of V-shaped main fins and side fins in the present invention.

The reference numerals in the figure are indicated as: 1-inner tube; 2-phase change material segment; 3-outer tube; 4-V-shaped main fin; 41-side fin.

Detailed ways

In this embodiment, a dendritic fin type phase changer for enhancing heat exchange, please refer to FIG. 1 and FIG. 2, including an inner tube 1 and an outer tube 3, the fin plate and the side The fins 41 are all made of copper plates, the inner tube 1 is a copper tube, the outer tube 3 is a stainless steel tube, the outer wall of the outer tube 3 is wrapped with a thermal insulation layer, and the inner tube 1 penetrates the outer tube 3, a phase change material section 2 is arranged between the inner tube 1 and the outer tube 3, V-shaped main fins 4 are welded on the outer wall of the inner tube 1, and the V-shaped main fins 4 are Side fins 41 are welded on both sides, the V-shaped main fins 4 and the side fins 41 are inserted into the phase change material segment 2, and the side fins 41 are obliquely welded on the V-shaped main fins 41. On the fins 4, the V-shaped main fins 4 and the side fins 41 are arranged to form dendritic fins, which are inserted into the phase change material section 2, thereby increasing the heat exchange area between the thermal fluid and the phase change material section 2. , thereby increasing the heat exchange rate and speeding up the entire heat storage process, and through the dendritic fins, the heat can be uniformly diffused to the phase change material section 2, thereby improving the temperature uniformity of the phase change material section 2.

As shown in FIG. 2 and FIG. 3 , the V-shaped main fin 4 includes two fin plates, and the first ends of the two fin plates are welded to each other to form a V shape and are welded to the outer wall of the inner tube 1 , the side fins 41 are welded on the side of the two fin plates away from each other; the angle between the two fin plates is 45°, and the angle between the two fin plates is 45°. The bisector is set along the diameter direction of the outer tube 3, the first end of the side fin 41 is welded with the middle position of the side wall of the fin plate, and the second end of the side fin 41 is close to the At the second end of the fin plate, the angle between the side fins 41 and the fin plate is 45°. The rate of heat storage and release is in the best state. By arranging the V-shaped main fins 4 and the side fins 41, firstly, all parts of the phase change material section 2 can be uniformly heated, so that the heat exchange reaction of the phase change material section 2 tends to increase. In order to be uniform and stable, reduce the temperature difference, and slow down the generation of natural convection. Secondly, when natural convection occurs, the V-shaped main fins 4 and the side fins 41 protrude outwards to block the flow of the phase change material and slow down the natural convection. In addition, when the phase change material flows, the phase change material can flow around, and the mixing effect of the phase change material at different temperatures can be improved, so as to achieve the purpose of uniform temperature.

Working principle: When in use, according to the actual pressure requirements, select pipe fittings with different pressure levels, and check the tightness of the pipe to prevent danger and heat loss;

When the hot fluid flows through the inner tube 1, the temperature of the hot fluid is first transferred from the inner wall surface of the inner tube to the outer wall of the inner tube by heat conduction, and then the outer wall of the inner tube 1 transfers the heat to the V-shaped main fins 4 and side fins 41. , and finally transferred to the phase change material, the phase change material obtains heat and stores it in the form of phase change; when the heat stored by the phase change material needs to be used, it is only necessary to pass a low temperature heat exchange fluid into the inner tube, and the phase change material passes through The form of heat conduction transfers heat to the cryogenic fluid, while the phase change material solidifies below the melting temperature and gradually tends to the temperature of the heat transfer fluid.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived from this are still within the protection scope of the claims of this patent application.

Claims (6)

1. A dendritic finned phase change heat exchanger for strengthening heat exchange, characterized in that it comprises an inner tube (1) and an outer tube (3), and the inner tube (1) penetrates the outer tube (1). Inside the tube (3), a phase change material section (2) is arranged between the inner tube (1) and the outer tube (3), and V-shaped main fins are welded on the outer wall of the inner tube (1) (4), side fins (41) are welded on both sides of the V-shaped main fin (4), and both the V-shaped main fin (4) and the side fins (41) are inserted into the A phase change material segment (2), and the side fins (41) are obliquely welded on the V-shaped main fins (4). 2 . The dendritic fin type phase changer for enhancing heat exchange according to claim 1 , wherein the V-shaped main fins ( 4 ) comprise two fin plates, and the two The first ends of the two fin plates are welded to each other to form a V shape and are welded to the outer wall of the inner tube (1), and the side fins ( 41). 3 . The dendritic finned phase changer for enhancing heat exchange according to claim 2 , wherein the included angle between the two fin plates is 45°, and the two fin plates are 45°. The angle bisectors of each of the fin plates are arranged along the diameter direction of the outer tube (3). The dendritic fin type phase changer for enhancing heat exchange according to claim 2, wherein the first ends of the side fins (41) are connected to the fin plate. Welding at the middle position of the side wall of the side fin (41), the second end of the side fin (41) is close to the second end of the fin plate, and the angle between the side fin (41) and the fin plate is 45 °. 5 . The dendritic fin type phase changer for enhancing heat exchange according to claim 2 , wherein the fin plate and the side fins ( 41 ) are made of copper plate. 6 . The inner tube (1) is a copper tube. 6 . The dendritic fin type phase changer for enhancing heat exchange according to claim 1 , wherein the outer tube ( 3 ) is a stainless steel tube, and the outer tube ( 3 ) The outer wall is wrapped with a thermal insulation layer.

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