Heat-exchanger

FIELD: heat-exchangers, particularly submersible ones.

SUBSTANCE: heat-exchanger comprises body perforated with orifices located at cylindrical inlet chamber height, tube plate, tube bundle arranged so that coolant is directed transversely to the tube bundle. Heat exchanger also has displacers and spacing grid. Hexahedral collector is formed on tube bundle at inlet chamber height so that the collector is coaxial to the body. The hexahedral collector perimeter is free of tubes. Radial channels extend from collector corners to tube bindle perimeter. The radial channels are also free from tubes. Displacers are installed in spacing grid below inlet chamber.

EFFECT: possibility of uniform coolant flow over each heat-exchanging tube, provision of equal temperature characteristics at each tube outlet and reduced vibration of tubes in tube bundle.

5 dwg

 

The invention relates to heat exchangers mainly submersible type. The invention can be applied in heat exchange equipment, for example, in progeneration.

A known design of the heat exchanger, for example, module evaporator steam generator, comprising a housing, inside which is placed a bundle of tubes arranged in a triangular grid, the tube Board, in which are fixed the ends of the tubes, plungers, the spacer grid and the annular input chamber ("Nuclear energy", 2001, vol 91, issue 6, str, Fig.1).

Coolant getting in the inlet annular chamber towards the center of the tube bundle that wraps around a pipe in the transverse direction. Simultaneously, the flow of coolant is directed through each unit cell along the tube bundle. Given that the resistance of the cross flow tubes is much larger than longitudinal pipes located closer to the center, be depleted the flow compared to the outer pipe. Thus, there is a radial non-uniformity of flow through the tube bundle and underheating of the coolant in the Central pipe in comparison with the peripheral. This irregularity is the greater, the larger the diameter of the tube bundle and the smaller the length of the pipe. In addition, any cross-flow pipes causes is eBrazil pipes, which is greater, the greater the length of the pipes which are attached between the supports.

The aim of the present invention is to reduce the radial non-uniformity of the flow in the annular space and reducing vibration of the pipes.

The objective of the invention is to improve the hydrodynamics at the entrance to the tube bundle.

The technical result of the invention is the provision of a uniform flow along each heat transfer tube when the outer wrap, obtaining the same temperature characteristics of the coolant at the outlet of each pipe and the reduction of vibrations of the peripheral tubes of the tube bundle.

Put in the invention the technical result is achieved in that the heat exchanger includes a housing, a perforated holes at the height of the cylindrical part of the input cameras, pipe Board, tube bundle cross-flow of coolant pipes, displacers, the spacer grid, and according to the invention in the tube bundle at the height of the entrance chamber formed hex manifold, perimeter free of pipes and located coaxially with the casing, and from the angles mentioned collector diverge radial channels, also available from pipes, to the periphery of the tube bundle and the lower input of the camera in the spacer grid in free from pipes cells mounted displacers, kreplenie in the spacer the grille.

The invention is illustrated by drawings, which presents the following:

figure 1 is a longitudinal section of the heat exchanger;

figure 2 is a longitudinal section of the inlet chamber;

figure 3 is a cross section view along B-B of figure 2;

4 is a cross section, In figure 2;

5 is a transverse section along G-g of figure 2.

Figure 1 shows a housing 1, an annular chamber 2, the tube sheet 3, in which the sealed ends of the tubes of the tube bundle, the displacer 5, the spacer bars 6, which are attached to the plungers 7 (figure 4), reaching from the spacer grid for the entire length of the tube bundle and having a cross section with a circular or hexagonal shape.

Figure 2 shows the input chamber of the heat exchanger.

Figure 3 shows the pipe 4, the radial channels 8 and hex collector 9.

Figure 4 shows the housing 1, the tubes of the tube bundle 4, the spacer grid 6 and the plungers 7.

Figure 5 in the region below the spacer grid shows the housing 1, the plungers of the tubes of the tube bundle 4.

The operation of this device is as follows.

The coolant from the inlet annular chamber is directed toward the center of the beam. One part of the carrier transversely flowing pipe, comes to hex manifold, the other in the radial channels also reaches hex manifold, where the flows are mixed in a closed hex manifold, the static ones who Kie pressure of the individual threads are aligned and, therefore, the flow velocity at the outlet of the collector is the same. Forth from hex collector flow is directed to the center of the tube bundle, the transversely flowing remaining on the path of the pipe. When this hydraulic losses in the chamber will be substantially less than the cross flow of all pipes located on the radius of the tube bundle. The result is a more uniform flow rate along each heat transfer tube, receiving the same temperature characteristics of the coolant at the outlet of each pipe. The reduction of radial velocities of the fluid at the entrance to the tube bundle in cross flow reduces the vibration of the peripheral tubes. The transverse components of the flow in the inlet chamber of the heat exchanger shown by arrows.

A heat exchanger comprising a housing, a perforated holes at the height of the cylindrical part of the input cameras, pipe Board, tube bundle cross-flow of coolant pipes, displacers, the spacer grid, characterized in that the tube bundle at the height of the entrance chamber formed hex manifold, perimeter free of pipes and located coaxially with the casing, and from the angles mentioned collector diverge radial channels, also available from the pipe to the periphery of the tube bundle and the lower input of the camera in the remote controller with many brand is yuusei lattice free from pipes cells installed plungers, fixed in the spacer grid.



 

Same patents:

FIELD: the invention is meant for heat-exchanging and may be used in compact heat-exchangers made of pipes and a housing which are applied at flying vehicles.

SUBSTANCE: the limiter of flow-over of the heat-carrying agent between pipes and the housing in the heat-exchanging apparatus is fulfilled in the form of radial bulkheads installed in parallel to the axis of the housing. The limiter has elements in the form of balls located between the housing, pipes and radial bulkheads, the diameter of elements exceeds the magnitude of gaps between pipes. At that mentioned elements are fulfilled out of polymeric materials.

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2 dwg

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SUBSTANCE: heat-exchanger comprises heat-exchanging pipe bundle provided with hexahedral connection parts formed at pipe ends and defining tube and annular spaces. The heat-exchanger has annular shape in top view and has inner window adapted to convey solid particles, namely combustion products. Connection parts of the pipes are welded with each other. Annular spaces defined around the pipes are closed with separate plates made as elongated hexahedrons tangentially adjoining paired pipes and welded with each other. One heat-exchanging pipe is removed from both heat-exchanger sides relatively vertical axis thereof. Inlet and outlet connection pipes communicated with annular space for heat transfer agent receiving are welded to free hexahedral cells formed after heat-exchanging pipes removal. Cells from opposite sides of connection pipes are closed with caps.

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3 dwg

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1 dwg

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1 dwg

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EFFECT: enhanced efficiency.

3 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

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EFFECT: improved heat exchange and enhanced heat power and reliability.

1 dwg

FIELD: heat transfer equipment, particularly used in furnaces characterized by descending combustion product movement, namely in power installations such as exhaust gas heat utilizing devices.

SUBSTANCE: heat-exchanger comprises heat-exchanging pipe bundle provided with hexahedral connection parts formed at pipe ends and defining tube and annular spaces. The heat-exchanger has annular shape in top view and has inner window adapted to convey solid particles, namely combustion products. Connection parts of the pipes are welded with each other. Annular spaces defined around the pipes are closed with separate plates made as elongated hexahedrons tangentially adjoining paired pipes and welded with each other. One heat-exchanging pipe is removed from both heat-exchanger sides relatively vertical axis thereof. Inlet and outlet connection pipes communicated with annular space for heat transfer agent receiving are welded to free hexahedral cells formed after heat-exchanging pipes removal. Cells from opposite sides of connection pipes are closed with caps.

EFFECT: increased heat-exchanger strength and heat-transfer efficiency, elimination of complicated structural units, possibility to adapt heat-exchanger for burners characterized by descending combustion product movement.

3 dwg

Heat-exchanger // 2282123

FIELD: heat-exchangers, particularly submersible ones.

SUBSTANCE: heat-exchanger comprises body perforated with orifices located at cylindrical inlet chamber height, tube plate, tube bundle arranged so that coolant is directed transversely to the tube bundle. Heat exchanger also has displacers and spacing grid. Hexahedral collector is formed on tube bundle at inlet chamber height so that the collector is coaxial to the body. The hexahedral collector perimeter is free of tubes. Radial channels extend from collector corners to tube bindle perimeter. The radial channels are also free from tubes. Displacers are installed in spacing grid below inlet chamber.

EFFECT: possibility of uniform coolant flow over each heat-exchanging tube, provision of equal temperature characteristics at each tube outlet and reduced vibration of tubes in tube bundle.

5 dwg

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