Heat-exchange apparatus

FIELD: heat engineering, in particular, in heat-exchange apparatuses of air cooling, in which outdoor air injected by the fan impeller is used as a cooling medium, and, for example, natural gas is used as the cooled gaseous medium.

SUBSTANCE: the air cooling heat-exchange apparatus has at least one vertical shell open from the bottom and from above made of woven material monolithic in cross section in the form of successively joined to one another in the direction from below upwards toroidal, cylindrical or linear surfaces, as well as a heat exchange surface and a fan impeller in each shell. The shell of the heat-exchange apparatus is made of fiberglass material impregnated by epoxy resin, the relation of various components of the shell surfaces and the diameter of the cylindrical surface is selected as follows: h=(1.47...1.49)d; g=(0.58...0.61)d; r=(0.18...0.20)d; a=(0.14...0.16)d; b=(0.55...0.57)d, where: d- the diameter of the cylindrical surface; h - the distance from the beginning of the linear surface to the mounting base; g - the distance from the beginning of the toroidal surface to the mounting base; r - the radius of the toroidal surface; a - the distance from the beginning of the cylindrical surface to the beginning of the linear surface; b - the distance from the end of the cylindrical surface to the beginning of the linear surface. Besides, the heat exchange surface positioned above the shell represents a rectangle in cross section characterized by the following relations: n=(1.1...1.12)d; m=(1.4...1.42)d, where: d - the diameter of the cylindrical surface; n - the smaller side of the rectangle; m - the larger side of the rectangle. The heat exchange surface is also made in the form of staggered horizontal rows of pipes, the distance between the centers of three adjacent pipes of the adjacent rows form an isosceles triangle with a base larger than the lateral sides.

EFFECT: enhanced efficiency of heat exchange and reduced consumption of power.

5 cl, 5 dwg

 

The invention relates to heat engineering, in particular to heat-exchange the air cooling apparatus, in which the cooling medium is used, the outside air pumped by the impeller of the fan, and as a cooled gas environment, for example, natural gas.

Known heat exchangers air cooled, containing an open top and bottom casing, made in cross-section in the form of consistently paired with each other in the upward curved, cylindrical and ruled surfaces, and heat exchange surface and the impeller (see, for example, patent RF №2047073, CL F 28 D 7/00, 1995). This apparatus is achieved by intensification of heat transfer in change in the physical condition of the cooling medium through the use of finned tubes, fixed in the tube plate at an angle of 60-70°. However, this intensification is achieved in the process of condensation and therefore requires significant energy consumption and virtually ineffective for cooling environments that do not change their aggregate state.

Thus, the technical result set by the invention, in this heat-exchange apparatus not achieved.

Famous and heat exchangers air cooled, containing an open top and bottom casing, made in paperasserie in the form of sequentially interconnected curvilinear (unknown character), cylindrical and ruled surfaces. The casing has a heat exchange surface and the impeller (see and. C. the USSR №1044942, CL F 28 D 7/00, 1983).

In this heat exchanger the lower part of the casing is not toroidal surface. It can be assumed based on indirect evidence, that the casing is made of metal.

The heat exchanger for the heat exchange efficiency is inferior to the proposed and requires high energy consumption, since the performance of the metal casing does not create the required aerodynamic conditions for the intensification of heat transfer, in addition, the surface of the lower part of the casing is not optimal. The location of the engine outside of the casing reduces aerodynamics.

Thus, in this heat-exchange apparatus of the technical result set by the invention is not achieved.

The objective of the invention is the creation of a heat exchanger for cooling air and gas environments, mainly natural gas, which would reach a high efficiency of heat transfer while reducing energy consumption.

The technical result achieved by the invention, the intensification of heat transfer engineering, and reduce energy consumption.

This technical result is achieved in that the heat exchanger air cooler includes at least one open top and bottom vertical the first casing, made of woven material solid in cross-section, in the form of consistently paired with each other in the upward direction toroidal, cylindrical and ruled surfaces, and heat exchange surface and the impeller in each casing.

Even more technical result is achieved in that the casing is made of fiberglass material impregnated spokoinoi resin; the ratio of the various elements of the surface casing to the diameter of the cylindrical surface is selected as follows:

h=(1,47...1,49)d; g=(...0,61 0,58)d; r=(0,18 0,20...) d; a=(0,14...0,16)d; b=(0,55...0,57)d where

d - diameter cylindrical surface;

h - distance from the beginning of ruled surfaces to the mounting base;

g - distance from the beginning of the toroidal surface to the mounting base;

r is the radius of the toroidal surface;

a - the distance from the beginning cylindrical surface until the beginning of ruled surfaces;

b - the distance from the end of the cylindrical surface until the beginning of ruled surfaces;

heat exchange surface is located above the casing and represents a cross section of a rectangle, characterized by the following relations: n=(1,10...1,12)d; m=(...1,42 1,40)d where

d - diameter cylindrical surface;

n is the smaller side of the rectangle;

m - most side is removelink;

heat-exchange surface is made in the form of horizontal rows of tubes arranged in a checkerboard pattern, with the distance between the centers of three neighboring tubes of adjacent rows form an isosceles triangle with base large sides.

The invention is illustrated by drawings, where

figure 1 schematically shows the described heat exchanger,

figure 2 - part of the heat exchange surface in an enlarged scale,

figure 3 - section a-a figure 1,

figure 4 is a section along B-B 1,

figure 5 - section In figure 1.

The heat exchanger includes a housing made in the form of consistently paired with each other in the upward direction of the toroidal 1, 2 and cylindrical ruled surfaces, consisting of two sections 3 and 4 (first - expanding, the second is vertical). The casing is made of woven material, mostly of fiberglass material impregnated with epoxy resin. The casing is made solid in cross section. In the same longitudinal cross-section it can be either monolithic or each part of the surface (including two ruled surfaces 3, 4) are connected by known means, such as bolts.

The ratio of the various elements of the surface casing to the diameter of the cylindrical surface is selected as follows:

h=(1,47...1,49)d; g=(...0,61 0,58); r=(0,18 0,20...) d; a=(0,14...0,16)d; b=(0,55...0,57)d where

d - diameter cylindrical surface;

h - distance from the beginning of ruled surfaces to the mounting base;

g - distance from the beginning of the toroidal surface to the mounting base;

r is the radius of the toroidal surface;

a - the distance from the beginning cylindrical surface until the beginning of ruled surfaces;

b - the distance from the end of the cylindrical surface until the beginning of ruled surfaces.

In the area of the cylindrical surface 2 of the casing is located the impeller 5 of the fan. In the area of ruled surfaces 3 is the motor 6 (in the particular case of the engine can partially enter the area of the cylindrical surface).

Heat-exchange surface in the form of horizontal rows of tubes 7, secured in the tube plate 8 and arranged in a checkerboard pattern, is installed over the casing.

The upper part of the casing, the top of which is this heat exchange surface is a rectangle in cross-section, characterized by the following relations:

n=(1,10...1,12)d; m=(...1,42 1,40)d where

d - diameter cylindrical surface;

n is the smaller side of the rectangle;

m - most side of the rectangle.

The distance between the centers of neighboring tubes of adjacent rows form an isosceles triangle with base, large is ekovich parties.

To pipe the boards 8 are attached to the sidewall 9, which in the final result and forms a rectangular surface.

Performing a cover of woven material (in particular, of glass fiber material impregnated with epoxy resin) enables the monolithic casing either in whole or in cross-section, which would provide a significant improvement of the aerodynamic properties of the air tract. Performing the same casing of the above surfaces in combination with the above-mentioned ratios of the elements of the surface casing (which were found in theoretical calculations combined with experimental data) will allow you to create an optimal path, in this model with respect to the air flow. Also improves aerodynamics and engine location within the enclosure.

The same optimal and above the location of the pipe 7, which in combination with optimal air tract and provides the intensification of heat transfer and reduced energy consumption.

Testing of prototypes has shown that savings of energy, in particular electricity consumed by the engine, is achieved in 2 and more times compared with the same air heat exchangers made of metal casing and not having the above ratios.

The casing on titsa at the optimal distance from the mounting substrate 10, what also contributes to the intensification of heat transfer. This may serve, in particular, the ground or base in the area of housing.

In practice, the air cooling apparatus includes, as a rule, six guards, joined together by known means and mounted on a common mounting plate.

The work of the heat exchanger.

In tube 7 is served cooled environment, primarily natural gas. Start the engine 6 and by means of the impeller 5 fan outside air through the gap between the housing and the mounting base 10 is fed to the tube 7 heat transfer surfaces, washing them in the transverse direction and through the process of heat exchange (cooling). The engine speed chosen in accordance with the specific dimensions of the device. The impeller provides the ability to rotate its blades depending on the desired flow of pumped air.

1. Heat exchanger for air cooling, containing at least one open top and bottom vertical casing, made of woven material monolithic cross-section in the form of consistently paired with each other in the upward direction toroidal, cylindrical and ruled surfaces, and heat exchange surface and the impeller ve is tilator in each casing.

2. Heat exchanger according to claim 1, characterized in that the casing is made of fiberglass material impregnated with epoxy resin.

3. Heat exchanger according to claim 1, characterized in that the ratio of the various elements of the surface casing to the diameter of the cylindrical surface is selected as follows:

h=(1,47÷1,49)d; g=(0,58÷0,61)d; r=(0,18÷0,20)d; a=(0,14÷0,16)d; b=(0,55÷0,57)d

where d is the diameter of the cylindrical surface;

h - distance from the beginning of ruled surfaces to the mounting base;

g - distance from the beginning of the toroidal surface to the mounting base;

r is the radius of the toroidal surface;

a - the distance from the beginning cylindrical surface until the beginning of ruled surfaces;

b - the distance from the end of the cylindrical surface until the beginning of ruled surfaces.

4. Heat exchanger according to claim 1, characterized in that the heat exchange surface is located above the casing, is a cross-section rectangle, characterized by the following relations:

n=(1,1÷1,12)d; m=(1,4÷1,42)d

where d is the diameter of the cylindrical surface;

n is the smaller side of the rectangle;

m - most side of the rectangle.

5. Heat exchanger according to claim 1, characterized in that the heat exchange surface to perform the ene in the form of horizontal rows of tubes, arranged in a checkerboard pattern, with the distance between the centers of three neighboring tubes of adjacent rows form an isosceles triangle with base large sides.



 

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