The heat exchanger

 

(57) Abstract:

The invention is intended for use in heat exchange technology. The heat exchanger contains inlet and outlet pipes of the cooler and the coolant enclosure, inside of which is placed the upper and lower plate and tube bundle. According to the invention each tube bottom is made of two plates forming between them a closed cavity, the tubes of the tube bundle are rigidly connected to the plates of the bottoms through the sleeve, and the lower part of the tube bundle is fixed in the movable bottom plate, and bottom plate provided with a conical Radome, the body of which is made channels, connected with the cavity between the plates of the lower plate and through the compensator with the inlet pipe cooler, with one of the plates of each plate in contact with fluid, has a thickness of SPL= (0,26 - 0,5)dTrnwhere dTrn- the outer diameter of the tube, and it is made of heat-exchange fins, and the body is made of double-layer, on the inner surface of which are heat-exchanging ribs. The invention improves the reliability of the heat exchanger. 2 C. p. F.-ly, 4 Il.

The invention relates to heat engineering, in particular to Efteling devices.

The closest in technical essence of the present invention is a heat exchanger containing a tube bundle, fastened the lower part of the pipe in the bottom, and the supply device into the cavity of the bottom of the cooler and the subsequent drainage of the cavity. C. N 574593, MKI F 28 D 7/00, F 28 F 9/02, 1977 - prototype).

The main disadvantages of this device are insufficient cooling zones of high thermal stresses in the mounting locations of the tube bundle in the upper and lower ends, which limits the upper limit temperature of the coolant at the inlet of the heat exchanger, and the lack of compensation of thermal deformation of the tube bundle, which reduces the reliability of the heat exchanger (TA) in General. The objective of the invention is to remedy these disadvantages and to create a reliable and efficient high temperature TA.

This object is achieved in that in the proposed heat exchanger containing inlet and outlet pipes of the cooler and the coolant enclosure, inside of which is placed the upper and lower plate and tube bundle according to the invention each tube bottom is made of two plates forming between them a closed cavity, the tubes of the tube bundle in the bottom, moreover, the bottom plate provided with a conical Radome, the body of which is made channels, connected with the cavity between the plates of the lower plate and through the compensator with the inlet pipe cooler, with one of the plates of each plate in contact with fluid, has a thickness of SPL= (0,26 - 0,5)dTrnwhere dTrn- the outer diameter of the tube, and it is made of heat-exchange fins, and the body is made of double-layer, on the inner surface of which are heat-exchanging ribs.

When using plates with SPL< 0,26 dTrnthe influence of the fins slightly, and the possible loss of hermeticity of a closed cavity between the plates.

When performing inserts with SPL> 0.5 dTrnthe surface temperature of the wafer-side fluid is significantly increased, which can lead to local overheating of the material of the plate.

To compensate for thermal expansion of the lower part of the tube bundle is fixed in the movable bottom plate, which is connected with the compensator in the form of bellows.

To reduce the hydraulic resistance, reversal and additional cooling part of the heat carrier bottom of the layer.

To increase the efficiency of heat transfer on the inner layer of the body has heat transfer fins.

To increase the conductivity of one of the plates of each tube of the bottom in contact with the fluid made of a material based on copper.

The invention is illustrated by drawings, where Fig. 1 shows a longitudinal section of THE Fig. 2 - element And Fig. 1, in Fig. 3 - section b-B in Fig. 2, in Fig. 4 - section b-b of Fig. 1.

The main constituent elements of the proposed device are:

1 - the bottom-top;

2 - the bottom of the bottom;

3 - plate;

4 - plate;

5 - tube;

6 - connecting sleeve;

7 - rib;

8 - fairing;

9 - compensator;

10 - block;

11 - nozzle;

12 - nozzle;

13 - nozzle;

14 - nozzle;

15 is an annular gap;

16 - collector;

17 - distributing pipe;

18 - hole;

19 - collector;

20 - collector;

21 - intercostal space;

22 - collector;

23 - the inner layer of the body.

The heat exchanger is equipped with pipe ends 1 and 2, consisting of plates 3 and 4, forming between them a closed cavity, with flowing inside the tubes 5 and sedentarist tube bundle is fixed in the movable plate 2, have conical fairing 8 and a temperature compensator 9. The upper plate 1 is rigidly connected to the housing 10. The supply and drainage of fluid are carried out through the pipes 11 and 12 respectively. The cooler is supplied via the pipe 13 and is discharged through pipe 14. The annular gap 15 for flow of the heat carrier is connected to the collector 16. Distributing pipe 17 through the holes 18 is connected to the collector 19 and through the tube 5 with the reservoir 20. Intercostal space 21 is connected to the collector 22. Power housing comprises an outer housing 10 and inner layer 23.

The heat exchanger works as follows.

Coolant with high temperature, is fed through the pipe 11 into the Central part THAT expands transversely flowing around the heat exchange tubes, and through the annular gap 15 between the casing and the tube bundle is fed into a collecting reservoir 16, where and discharged through the pipe 12.

Cooler, as the environment with a higher inlet pressure, is supplied through the pipe 13 into the distributing pipe 17, the cooling compensator 9, fairing 8, plates 3, 4 of the bottom 2, through holes 18 enters the manifold 19, it is distributed through the pipes 5, going to the manifold 20, flowing in a closed cavity intercostal space 21, additionally cools the coolant then flows into the manifold 22 and is withdrawn through pipe 14.

The use of the invention makes it possible to intensify the process of heat transfer due to more developed heat transfer surfaces of the plates 4, the inner layer 23, fairing 8, significantly raise the temperature of the coolant at the entrance to TA and reliability at the expense of efficient cooling plates 4 heads 1 and 2, the mobility of the lower plate 2 and the application of the compensator 9.

1. The heat exchanger containing the inlet and outlet pipes of the cooler and the coolant enclosure, inside of which is placed the upper and lower heads and a bunch of tubes, wherein each tube bottom is made of two plates forming between them a closed cavity, the tubes of the tube bundle are rigidly connected to the plates of the bottoms through the sleeve, and the lower part of the tube bundle is fixed in the movable bottom plate, and bottom plate provided with a conical Radome, the body of which is made channels, connected with the cavity between the plates of the lower plate and through the compensator with the inlet pipe cooler, when one of the plates of each plate in contact with fluid, has a thickness of SPL= (0,26 -, the case is made of double-layer, on the inner surface of which are heat-exchanging ribs.

2. The heat exchanger under item 1, characterized in that one of the plates of each tube of the bottom in contact with the fluid made of a material based on copper.

3. Heat exchanger according to PP. 1 and 2, characterized in that the compensator is made in the form of bellows.

 

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