CN215930645U - Discontinuous S-shaped fin heat exchange plate and PCHE core body - Google Patents

Abstract

The utility model provides a discontinuous S-shaped fin heat exchange plate and a PCHE core body. The discontinuous S-shaped fin heat exchange plate provided by the utility model has the advantages that the fluid inlet and outlet flow channel forms, the sawtooth-like configuration and the design of the positive and negative S-shaped fins increase the convection heat exchange area of the heat exchange plate, reduce the flow distribution nonuniformity and the flow separation phenomenon of the fluid and reduce the pressure loss of the fluid in the flow heat exchange process.

Description

Discontinuous S-shaped fin heat exchange plate and PCHE core body

Technical Field

The utility model relates to the field of efficient heat exchange of compact heat exchangers, in particular to a discontinuous S-fin type heat exchange plate and a PCHE core body.

Background

As a novel plate heat exchanger, a printed circuit board heat exchanger (PCHE) has the advantages of high compactness, high structural strength, good heat exchange efficiency and long-time stable and reliable operation under severe working conditions such as high temperature, high pressure and the like, and based on the advantages, the heat exchanger is suitable for the fields of ultra-high temperature gas cooled reactor coolers, solid oxide fuel cells, concentrated solar fused salt heat storage, hydrogen energy, coal-fired thermal power generation and the like.

The common thickness of the PCHE heat exchange plate is about 1.5-2.0mm, the required flow channel pattern is carved by advanced photochemical etching, then the multiple layers of plates are welded into a whole by a diffusion welding bonding technology, the PCHE has excellent structural strength and can bear the working pressure of about 60MPa by the advanced machining and manufacturing process, meanwhile, the flow channel of the PCHE is various and controllable in form, the hydraulic diameter is usually within the range of 0.5-2.0mm, the structure is compact, and the PCHE heat exchange plate can show great advantages in certain working environments with limited volume.

In the prior art, the flow channel form of the PCHE is mainly divided into two categories: continuous flow channels and discontinuous flow channels. Common straight runners, Zigzag runners, S-curve runners and trapezoidal runners of the continuous runners; the discontinuous flow channel form is mainly caused by the discontinuity of a fin structure, and long hexagonal fins, wing-shaped fins, rhombic fins, mixing fins and the like are common. Research shows that compared with a continuous flow channel, the discontinuous flow channel structure of the PCHE heat exchange plate has better comprehensive capacity. In order to improve the heat exchange capability of the heat exchanger, it is tried to increase the disturbance of the fluid in the flow channel and increase the convection heat exchange area, but the heat exchange capability is usually increased by improving the compactness, and at the same time, a large pressure loss is inevitably brought.

Therefore, it is desirable to provide a PCHE heat exchanger plate with better comprehensiveness to solve the above-mentioned problems.

Disclosure of Invention

The utility model is made to solve the above problems, and an object of the utility model is to provide a discontinuous S-fin heat exchange plate, wherein the heat exchange plate sheet is provided with a fluid inlet uniform distribution area, a fluid outlet contraction area and a discontinuous S-fin area, the side edge of the heat exchange plate sheet is of a sawtooth-like structure, and the discontinuous S-fin area comprises a positive fin and a negative fin which have the same structure and different arrangement positions.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that a concave flow channel is arranged in the uniform distribution area of the fluid inlet.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that the boundary tangent of the fluid inlet uniform distribution area is parallel to the arc tangent of the inverse fin.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that two side edges of the sawtooth-like structure are respectively consistent with the axial directions of the positive fin and the reverse fin.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that the distance from the left side edge of the sawtooth-like structure to the axis of the positive fin is 1/2 of the pitch of the positive fin and the reverse fin.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that the positive fin and the heat exchange plate have a positive anticlockwise included angle theta of 30-45 degrees in the length direction, and the positive anticlockwise included angle phi of the reverse fin and the heat exchange plate have a complementary angle with the included angle theta.

The discontinuous S-shaped fin heat exchange plate provided by the utility model is also characterized in that the fin pitch of the positive fin and the negative fin is 3.0-5.0mm, the fin length is 5.0-8.0mm, the fin width is 0.5-1.0mm, and the fin vertex distance is 1.2-2 mm.

Another objective of the present invention is to provide a PCHE core, wherein the core includes a plurality of stacked discontinuous S-fin heat exchange plates, the discontinuous S-fin heat exchange plates are the heat exchange plates described in any of the above, the plurality of discontinuous S-fin heat exchange plates are divided into a hot side heat exchange plate and a cold side heat exchange plate, and the hot side heat exchange plate and the cold side heat exchange plate are stacked alternately.

The PCHE core of the present invention is further characterized by openings at the four corners of the heat exchanger plate, the openings being inlet and outlet ports for the fluid.

The present invention provides a PCHE core further characterized by cold fluid inlet and outlet apertures at a primary diagonal position of the cold side heat exchanger plate and hot fluid inlet and outlet apertures at a secondary diagonal position of the hot side plate, the cold and hot fluids in the core flowing in opposite directions.

Compared with the prior art, the utility model has the beneficial effects that:

the discontinuous S-shaped fin heat exchange plate provided by the utility model has the advantages that the fluid inlet and outlet flow channel forms, the sawtooth-like configuration and the design of the positive and negative S-shaped fins increase the convection heat exchange area of the heat exchange plate, reduce the flow distribution nonuniformity and the flow separation phenomenon of the fluid and reduce the pressure loss of the fluid in the flow heat exchange process.

The PCHE core body provided by the utility model is formed by stacking a plurality of layers of discontinuous S-shaped fin heat exchange plate sheets, the compactness of the core body is increased, and the overall flowing and heat exchange performance of the core body is effectively improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a PCHE core configuration provided by an embodiment of the present invention;

FIG. 2 is an exploded view of a discontinuous S-fin configuration according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a sawtooth-like side structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a uniform distribution area according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a constriction region provided in an embodiment of the present invention;

wherein the content of the first and second substances,

A. a discontinuous S-fin region; alpha, positive wing; beta, reverse fin; theta, the positive wing axis and the x axis form a positive and counterclockwise included angle; phi and a positive and counterclockwise included angle between the axis of the reverse fin and the axis x; lx, wing pitch; ly, long wing; lz, width of fin; lw, fin vertex distance; 0. a PCHE core body of discontinuous fin type heat exchange plate; 1. a cold side heat exchange plate; 2. a cold fluid inlet equipartition zone; 3. a cold fluid outlet constriction zone; 4. a cold fluid outlet orifice; 5. a hot fluid inlet port; 6. a hot fluid inlet equipartition zone; 7. a sawtooth-like structure; 8. a hot fluid outlet constriction zone; 9. a hot side heat exchange plate; 10. a cold fluid inlet orifice; 11. hot fluid outlet orifice

Detailed Description

In order to make the technical means, the original features, the achieved objects and the effects of the present invention easily understood, the following embodiments are provided to specifically describe the discontinuous S-fin heat exchange plate and the PCHE core in conjunction with the accompanying drawings.

In the description of the embodiments of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing and simplifying the description of the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the utility model, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

It should be noted that, in the description of the present invention, the terms "inlet", "outlet", "positive", "negative", "primary" and "secondary" are only named descriptions of relative positions, and are not to be understood as referring or implying specifically, the terms "cold" and "hot" with respect to the fluid temperature are only descriptions of relatively high and low fluid temperatures, and are not to be understood as limiting the present invention, the black arrow line in fig. 1 represents the direction of the fluid flow, the coordinate axes "x" and "y" are only descriptions of directions and position relations based on the drawings, the present invention is described only with respect to the discontinuous S-fin heat exchange plates and the stacked PCHE core, and does not describe the proceeding, outlet connection pipes, external shell and other related structural members, and with respect to the description of the formation of the heat exchange plate flow channels, the etching technology and diffusion welding technology for describing the heat exchange plate processing of the present invention represent a preferred processing technology, and not unique.

As shown in fig. 1 to 5, a discontinuous S-fin heat exchange plate is provided, the heat exchange plate sheet is provided with a fluid inlet uniform distribution area 2, a fluid outlet contraction area 3 and a discontinuous S-fin area a, the side edge of the heat exchange plate sheet is of a sawtooth-like structure 7, and the discontinuous S-fin area a includes a positive fin α and a negative fin β having the same structure and different arrangement positions. And the fluid inlet uniform distribution area is provided with a sunken flow channel. The boundary tangent of the fluid inlet distribution area is parallel to the arc tangent of the inverse fin beta. Two side edges of the sawtooth-like structure 7 are respectively consistent with the axial directions of the positive fin alpha and the reverse fin beta. The distance from the left side edge of the sawtooth-like structure 7 to the axis of the positive fin is 1/2 of the pitch of the positive fin and the reverse fin. The positive fin alpha and the heat exchange plate are in a positive anticlockwise included angle theta of 30-45 degrees in the length direction, and the positive anticlockwise included angle phi of the reverse fin and the heat exchange plate are complementary to the included angle theta. The fin pitch Lx of the positive fin alpha and the negative fin beta is 3.0-5.0mm, the fin length Ly is 5.0-8.0mm, the fin width Lz is 0.5-1.0mm, and the fin vertex distance Lw is 1.2-2 mm.

In the embodiment, the fluid enters the discontinuous S-shaped fin area A through the diversion and uniform distribution action of the cold-sunken flow channel type fluid inlet uniform distribution area, the flow channel structure with the gradually expanded section of the fluid inlet uniform distribution area 2 can better and uniformly distribute the fluid to the discontinuous S-shaped fin area, and when the fluid impacts the fin structure, the inlet pressure gathering phenomenon of the discontinuous S-shaped fin area is reduced as the flow direction is tangent to the arc line at the beta end of the reverse S-shaped fin; meanwhile, the arrangement of the sawtooth-like side structures 7 further ensures the uniformity of fluid flow, and as shown in fig. 2 and 3, the structural relationship and the size between the sawtooth-like structures and the positive fins alpha and the negative fins beta can reduce the flow velocity change of the fluid at the position close to the side edges of the heat exchange plates, which is caused by the change of the flow cross section. The fluid carries out heat exchange in the discontinuous S-shaped wing-shaped area, the flowing uniformity is good, and the S-shaped flow channel pattern can realize the adherent movement of the fluid and reduce the possibility of fluid separation. The cold fluid outlet contraction area is mainly used for conveying cold fluid after heat exchange, and the reducing structure plays a role in guiding and concentrating the fluid and reduces the possibility of occurrence of flow dead zones.

Some embodiments provide a PCHE core 0, the core includes a plurality of discontinuous S wing type heat transfer plates of piling up, discontinuous S wing type heat transfer plate is the heat transfer plate that above-mentioned embodiment provided, a plurality of discontinuous S wing type heat transfer plates divide into hot side heat transfer plate 9 and cold side heat transfer plate 1, hot side heat transfer plate 9 with cold side heat transfer plate 1 piles up in turn. Openings are arranged at four corners of the heat exchange plate and are inlet holes and outlet holes of fluid. The cold fluid inlet hole 10 and the cold fluid outlet hole 4 are arranged on the main diagonal of the cold side heat exchange plate 1, the hot fluid inlet hole 5 and the hot fluid outlet hole 11 are arranged on the secondary diagonal of the hot side plate 9, and the cold fluid and the hot fluid in the core body flow in opposite directions.

In the above embodiment, the specific number of heat exchange plates of the PCHE core 0 provided is determined according to the total heat exchange area and the area of a single heat exchange plate, the cold-side heat exchange plate 1 and the hot-side heat exchange plate 9 have similar structures, and the first row and the last row of the S-fin type of the cold-side heat exchange plate 1 and the hot-side heat exchange plate 9 have opposite distribution, for example, the first row and the last row of the cold-side heat exchange plate 1 are positive fins α, and the first row and the last row of the hot-side heat exchange plate 9 are negative fins. Cold fluid enters the cold fluid inlet uniform distribution area 2 from the cold fluid inlet hole 10, carries out heat exchange in the discontinuous S-shaped fin area A, and is discharged from the cold fluid outlet hole 4 through the cold fluid outlet contraction area 3; the hot fluid enters from a hot fluid inlet hole 5, passes through a hot fluid inlet uniform distribution area 6, exchanges heat in a discontinuous S-shaped fin area A, and is discharged from a hot fluid outlet hole 11 through a hot fluid outlet contraction area 8. The S-shaped fin structure on the heat exchange plate enlarges the convection heat exchange area, can enhance the convection heat exchange effect of the core body, has a special flow channel form on the heat exchange plate, has good uniformity of an internal flow field, and effectively reduces the pressure loss in the flow channel, thereby further improving the comprehensive performance of the PCHE.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The discontinuous S-shaped fin heat exchange plate is characterized by being provided with a fluid inlet uniform distribution area, a fluid outlet contraction area and a discontinuous S-shaped fin area, wherein the side edge of the heat exchange plate is of a sawtooth-like structure, and the discontinuous S-shaped fin area comprises positive fins and negative fins which are identical in structure and different in arrangement position.

2. The discontinuous S-fin heat exchange plate of claim 1, wherein the fluid inlet distribution area is provided with a recessed flow channel.

3. The discontinuous S-fin heat exchange plate of claim 2, wherein a boundary tangent of the fluid inlet distribution area is parallel to an arc tangent of the counter-fin.

4. The discontinuous S-fin heat exchange panel according to claim 1, wherein both sides of the zigzag structure are aligned with the axial direction of the positive fin and the negative fin, respectively.

5. The discontinuous S-fin heat exchange panel of claim 1, wherein the distance from the left side of the serration-like structure to the axis of the positive fin is 1/2 times the pitch of the positive and negative fins.

6. The discontinuous S-fin heat exchange plate of claim 1, wherein the positive fin has a positive counterclockwise angle θ of 30 ° -45 ° with respect to the length direction of the heat exchange plate, and the negative fin has a positive counterclockwise angle Φ complementary to the angle θ with respect to the length direction of the heat exchange plate.

7. The discontinuous S-fin heat exchange plate of claim 1, wherein the positive and negative fins have a fin pitch of 3.0-5.0mm, a fin length of 5.0-8.0mm, a fin width of 0.5-1.0mm, and a fin apex distance of 1.2-2 mm.

8. A PCHE core comprising a plurality of discrete S-fin heat exchange plates in a stack, the discrete S-fin heat exchange plates being as claimed in any one of claims 1 to 7, the plurality of discrete S-fin heat exchange plates being divided into hot side heat exchange plates and cold side heat exchange plates, the hot side heat exchange plates and the cold side heat exchange plates being stacked alternately.

9. The PCHE core of claim 8, wherein the heat exchanger plates have openings at four corners, the openings being inlet and outlet ports for fluid.

10. The PCHE core of claim 9, wherein the cold fluid inlet and outlet apertures are in a primary diagonal position on the cold side heat exchanger plate and the hot fluid inlet and outlet apertures are in a secondary diagonal position on the hot side plate, the cold and hot fluids in the core flowing in opposite directions.

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