Matrix of ring-shaped lamellar heat exchanger

FIELD: gas turbine construction.

SUBSTANCE: matrix can be used in heat exchangers of heat regeneration heat system's exchanger, as well as for warming up (cooling down) gas or liquid in different heat-sing installations. Matrix of ring-shaped lamellar heat exchanger has heat-exchange members formed by lamellar plates with corrugated parts and openings of collectors, which are connected by means of lugs of internal and external diameters of plates or by means of lugs of collectors. Corrugated parts and collectors are limited by internal and external diameters of ring-shaped plate, or by lines being equidistant to them, and by frontal planes being parallel to axis of symmetry of corrugated parts. Axes of symmetry of any part and of collectors pass through center of plate. Angles between frontal planes of distributing and gathering collectors are equal to each other. Vertexes of angles are disposed at concentric circles having the same or different radiuses. Area of distributing collector relates to gathering collector is directly proportional to relation of corresponding radiuses of vertexes of angles and belongs to 0,4-0,8 interval.

EFFECT: improved efficiency of operation of heat exchanger.

2 cl, 7 dwg

 

The invention relates to the field of gas, mainly to heat exchangers of the system heat recovery of gas turbine plants, and can also be used for heating (cooling) gas or liquid in various combustion facilities.

Known matrix ring plate heat exchanger consisting of connected pairs between the annular plates with a punch collectors and heat exchange surfaces in the form of bumps [A.S. USSR №989294 MKI4F 28 D 9/00]. The disadvantage of it is Z-shaped flow pattern of the fluids in which the heated stream from the higher pressure, due to the two 90-degree turns, has a high resistance. When equal pressure loss-flow and cross-precise parts of Z-shaped course is divided into Z-shaped and C-shaped. In the middle part of the plate occurs circular flow (vortex), and heat transfer area of the plate decreases. Z-shaped scheme requires considerable radial extent of the matrix, increasing the outer diameter of the heat exchanger, the mass matrix and the housing.

A known heat exchanger [A.S. USSR №1324402 MKI3F 02 C 7/10] with cross - accurate movement, in which the matrix is made of pairwise connected by the same annular separator plates with a concentric punch the air Kahn the crystals containing surfaces in the form of bumps. A disadvantage of such a heat exchanger is in the presence of separator plates, creating a thermal resistance of heat transfer from the hot stream to the cold. In addition, they increase the size and weight of the heat exchanger.

The closest solution to the proposed device and adopted for the prototype is the matrix of the single plate cross-exact heat exchanger, made of annular plates with corrugated sections and holes collectors connected to the package using flanging the outer and inner diameter of the plates and flanging collectors [A.S. USSR №1376698 MKI4F 28 D 9/02].

It over heated fluid (air) is carried out in the tangential direction, and the heating of the fluid (gas) in the radial direction. When the radial course of the internal cavity in the outer area of the front heating fluid varies along the length of the channel. There is a reduction of gas velocity because of the temperature drop, and due to the increase of the cross-section area. The channels of the heated fluid are of different length depending on the ratio of the inner and outer diameters. Air velocity in the channels is variable due to the length of the channels and temperature changes.

This bias fields, temperatures and velocities leads to the fact that the ratio of those is loperamide on the heat transfer surface and the pressure loss along the length change significantly differ from the average. The non-uniformity of the temperature field and pressure field affect the efficiency of the heat exchanger.

A more favorable distribution of temperature field and velocity can be achieved by changing the feed direction of the heating fluid. However, the supply of gas to the outer diameter associated with the need to design complexity due to cross-flow of coolant supplying them to the heat exchanger.

The proposed matrix differs from the prototype in that the corrugated sections and collectors limited to the outer and inner diameters of the annular plate or them equidistant lines and frontal planes parallel to the symmetry axis of the corrugated sections, with the symmetry axis of each plot and collectors pass through the center of the plate, the angles between the frontal planes distributing and collecting manifolds are equal, and the top corners are located on concentric circles of the same or different radii.

The matrix also differs in that the ratio of the areas of precast and distributing reservoirs is directly proportional to the respective radii of the circumferences of the corners and lies in the range of 0.4 to 0.8.

The technical problem which is solved by the proposed device is to increase the efficiency of the heat exchanger.

The technical result, which provides a solution to post the certain tasks, is the creation of a uniform velocity field of the gas flow(air) and temperature.

The technical result is ensured by the fact that the matrix ring plate heat exchanger consists of a heat exchanger elements formed annular plates with corrugated sections and holes collectors connected by means of flanging the outer and inner diameters of the plates or flanging the collectors, and corrugated sections and collectors limited to the outer and inner diameters of the annular plate or them equidistant lines and frontal planes parallel to the symmetry axis of the corrugated sections, with the symmetry axis of each plot and collectors pass through the center of the plate, the angles between the frontal planes distributing and collecting manifolds are equal, and the top corners are located on concentric circles of the same or different radii. The technical result is also achieved by the fact that the ratio of the areas of precast and distributing reservoirs is directly proportional to the respective radii of the circumferences of the corners and lies in the range of 0.4 to 0.8.

Figure 1 presents the matrix of the heat exchanger; 2 - heat exchanger element, a front view; figure 3 is a heat exchanger element with a channel of the heated fluid; figure 4 - heat exchanger element with the channel is m heating of the heat carrier; figure 5 - cross section for holes collectors heat exchange element with the heating channel of the carrier; figure 6 - cross section a-a figure 2; figure 7 is a section b - B figure 2.

Matrix ring 1 plate heat exchanger consists of a heat exchanger elements 2 or 3, formed by an annular plate 4 (figure 2) corrugated sections 5 and holes 6 and 7. The plates are connected in matrix 1 with flanging 8 outer diameter and flanging 9 internal diameter of the plates 4 (Fig 3) or flanging 10 and 11 flanging 9 internal diameter of the plates 4 (Fig 3) or flanging 10 and 11 holes 6 and 7 (figure 5). The heat transfer elements 2 and 3 is made of two identical plates 4 (Fig 3, 4, 5). Paired plate in heat exchange element mirror, which is rotated 180 degrees. Corrugated sections 5 and openings 6 and 7 formed by the outer 12 and 13 internal diameter of the ring plate 4 or them equidistant lines 14, 15 and frontal planes 16, 17 parallel to the axis 18 of the symmetry of the corrugated sections 5 (2). The axis 18 of symmetry of each plot 5 and holes 6 and 7 pass through the center 19 of the plate 4. Hole 6 to form a reservoir for dispensing fluid on corrugated sections 5, and the holes 7 are teams of collectors. The angles between the frontal planes distributing and collecting manifolds is equal to (α P=αC), and the top 20 of the corners of the distributing manifold 6 and the top 21 of the corners of the precast collector 7 are located on concentric circles of the same or different radii.

Plate 4 in the heat exchange elements 2 or 3 form channels 22 for the passage of gas and the channels 23 for the passage of air (Fig 3, 4).

To achieve a uniform distribution of the coolant frontal plane 16 and 17 divide the bore precast and distributing collectors in a ratio inversely proportional to the ratio of velocity heads.

The ratio of the areas of precast and distributing reservoirs is directly proportional to the respective radii of the circumferences of the corners and lies in the range of 0.4 to 0.8.

The heat exchanger works as follows.

The heating fluid (e.g., gas after the turbine gas turbine units is passed to the matrix 1 and passing through the channels 22 (figure 4) corrugated sections 5, gives off heat heated fluid (e.g. air after the compressor). The radial movement of gas from the inner diameter 13 to the outer diameter of 12.

The heated coolant enters into the holes 6 of the distributing manifold and is distributed on the other side of the corrugated sections 5 plates 4. The heated coolant is moving through the channels 23 (3) corrugated sections 5 perpendicular heating those whom loosely. Holes 7 precast collector direct heated coolant out of the matrix. Since the area of the front surfaces and the length of the gas channels 22 and the air channels 23 remain identical over the entire area of the heat transfer element, the velocity distribution at the front of the uniform, allowing for greater speed and the maximum heat transfer coefficient.

1. Matrix ring plate heat exchanger comprising heat transfer elements formed annular plates with corrugated sections and holes collectors connected by means of flanging the outer and inner diameters of the plates or flanging collectors, characterized in that the corrugated sections and collectors limited to the outer and inner diameters of the annular plate or them equidistant lines and frontal planes parallel to the symmetry axis of the corrugated sections, with the symmetry axis of each plot and collectors pass through the center of the plate, the angles between the frontal planes distributing and collecting manifolds are equal, and the top corners are located on concentric circles of the same or different radii.

2. Matrix ring plate heat exchanger according to claim 1, characterized in that the ratio of the areas of precast and distributing collectors straight proportion the flax to the respective radii of the circumferences of the corners and lies in the range of 0.4 to 0.8.



 

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