The heat exchanger

 

(57) Abstract:

The invention is intended for use in the field of energy and chemical engineering. The heat exchanger includes a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation of the heat transfer media installed in channels with full and partial overlap of the latter, and according to the invention, each wall is connected at one end with the adjacent wall, and on the other side with the wall located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between the rows and between the rows and the housing. The invention reduces the hydraulic irregularity and to increase the compactness of the heat exchanger. 2 Il.

The invention relates to the field of energy and chemical engineering and can be used in various types of heat transfer equipment such as heat exchangers, heaters, refrigerators, coolers and dieticheskim, chemical, medical and other

A significant part of the plate heat exchanger consists of a set of parallel plates, stacked and sealed relative to each other so that the plates are formed of alternating channels for circulation of heat transfer media. Thus, the interconnected pairs of plates form the corresponding cavity for passage of a coolant, and the alternation of these pairs and connect them to the appropriate reservoir inlet and outlet of the heat exchange mediums form a plate heat exchanger. Power case with this design of the heat exchanger is not required, and ensuring the strength of the heat exchanger when the pressure above 0.1 MPa is produced by compression of the plate pack with plates and tightening elements.

Such heat exchangers are different from other types of heat exchangers are more compact heat exchange surface per unit volume, lower weight and overall size and cost (see, for example, N. In. Baranowski, L. M. Kovalenko, A. R. Yastrebenetsky, "Plate and spiral heat exchangers", Moscow, Mashinostroenie, 1973, pp. 45-46).

The disadvantages of these Teploobmennik significant differential pressure between the plates (>1 MPa).

Another type of plate heat exchangers can operate at pressure drops up to 4.5 MPa. Structurally they are made of a set of flat tubes, sealed at the edges in the tube plate, and then installed and sealed in the power case. When this one moves inside the flat tubes, and the other in the annular space, i.e. between the pipe and the inner surface of the housing (see, for example, ibid, pages 32-35).

The disadvantages include less compact surface in comparison with the heat exchangers described above.

Known plate heat exchangers, which includes the positive qualities of both kinds of the above-described heat exchangers (see, for example, the patent of the Russian Federation 2099663 of 20 December 1997).

The heat exchanger described in the patent of the Russian Federation, provided with a housing space inside of which is divided into zones, within which is placed a heat-exchange elements, consisting of a set of walls facing the outer edges in toward the body, and the inner edges toward the inner edges of the walls of adjacent areas and combined with the outer edge of one adjacent wall, and on the other end with the other adjacent wall forming channels for circulating heat exchange with full or partial overlap of the latter.

The disadvantage of this design is the large number of peripheral cells around the perimeter of the heat transfer element of each zone on the areas between the heat exchange element and the housing and between the heat exchange elements adjacent zones. Peripheral cell is different from the regular (primary, current) cell formed adjacent walls, increased reduced cross-section and, as a consequence, a large equivalent hydraulic diameter. This leads to the hydraulic non-uniformity between cells and causes deterioration of thermal-hydraulic characteristics of the heat exchanger as a whole.

On the greatest number of common characteristics and achieved the effect of the patent of the Russian Federation 2099663 chosen for the prototype.

Task - improving the efficiency of the heat exchanger by reducing the hydraulic uneven and increase the compactness of the heat exchanger.

The problem is solved due to the fact that in a heat exchanger, comprising a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation last set with full or casticin is Oh, located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between adjacent rows and channels between the rows and body.

The connection of the walls between the rows at the specified principle within the space covered by the housing, allows more compactly positioned heat-exchange surface, because it eliminates the division into zones. The elimination of the separation zone and, consequently, the elimination of peripheral cells between the heat exchange elements adjacent zones, the use of the vacated space to accommodate the additional heat transfer surfaces with regular (primary, current) cell allows to increase the efficiency of the heat exchanger, that is to get more performance with the same dimensions of the heat exchanger.

The number of established channels to one more than the number of rows. The presence of multiple channels allows the use of a heat exchanger for performing heat exchange between the two, and a large number of different environments, circulating at the same time on their own is but the Union of the walls in two lines,

- Fig.2 shows the Association of the walls in the number of rows of more than two.

In the space covered by the housing 1 (Fig.1), are heat-exchange elements, consisting of many walls. Each wall, for example 2, is connected with one end 3 with a connecting wall 4 and the other edge 5 - wall 6 located from it through an even number of intermediate walls 7 and 8, forming the rows of the joint walls 9, 10, 11, and between the rows and channels 12, 13 between the rows and the housing 1.

In Fig. 2 wall 2 is connected with the following wall similar to that described for Fig 1. A wall, for example 14, is connected with one end 15 with the wall 16 located from it through an even number of intermediate walls 2 and 7, with the other edge 17 with the following wall 18 located from it through an even number of intermediate walls 19, 20, 21, 22, forming the rows of the joint walls 23, 24, 25, 26, the channels 27, 28, 29 between the rows and channels 30, 31 between the rows and the housing 1.

The operation of the heat exchanger consider the example depicted in Fig 1.

Coolant, for example, the heated gas flows into the channels 11 with one end of the heat exchanger, moving along it heats up reaches the exit channel from the other end, and exits the heat exchanger, while in the example of a heating gas, served in the channels 12 and 13 towards a heated, moving along it, giving through the walls 9, 10 of the heat of the heated gas moving in the channel 11, and out of it

The proposed heat exchanger allows to obtain the same volume greater productivity, as provided for tight layout that is more efficiently used internal space, to reduce the hydraulic resistance.

A heat exchanger comprising a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation of the heat transfer media installed in channels with full and partial overlap of the latter, characterized in that each wall is connected at one end with the adjacent wall, and on the other side with the wall located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between the rows and between the rows and the housing.

 

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