Finned heat exchanger tube
(57) Abstract:Use in a heat exchanger, in particular in air-to-water heat exchanger deltas dry cooling towers. The invention srebrena heat pipe contains aluminum pipe 1 is embossed on its outer surface a helical circular ribs 2, made with parallel slits that are oriented symmetrically with respect to the perpendicular plane passing through the axis of the pipe, and petal segments of edges in each through one row between adjacent slits have slope 2 Il
FIELD: heat exchanging facilities for use in different industries.
SUBSTANCE: invention is designed for use in heat exchanging devices, particularly those with two non-communicating flows of heat carriers with heat exchange through wall. Proposed heat exchanger consists of housing accommodating thin-walled hollow elements with clearances in between, hollow ribs opening into said clearances and passing through inner space of thin-walled hollow elements being made in form of hermetically sealed flat spaces arranged in tandem and interconnected by circular channels, and ribs are made so that in any two adjacent thin-walled hollow elements single rib in one of elements is arranged along axis of heat exchanger, and other element has several ribs arranged over periphery of thin-walled hollow elements.
EFFECT: intensification of heat exchange, reduced overall dimensions and mass of device.
2 cl, 2 dwg
FIELD: heat engineering; production of methods and the equipment for production of finned pipes of cooling apparatuses or containers.
SUBSTANCE: the invention is intended for application in heat engineering, in particular, at production of finned pipes of cooling apparatuses or containers used for storage of spent fuel of nuclear reactors, and also other materials or objects being the powerful heat sources. The method of production of a heat-exchanging pipe provides for introduction of a core and ribs inside a tubular billet. At that on the internal surface of the tubular billet and on the external surface of the core there are preliminary made hollow longitudinal grooves. The ribs produced separately from the core are made in the form of a strip consisting of two layers, joint among themselves on edges in longitudinal direction or in the form of hollow pipes of oval cross-section, which before installation in the grooves are deformed creating inside excessive pressure, then insert them in the grooves and relieve the pressure. At that the pressure is chosen so, that the relative change of the maximal overall dimension of each rib in transversal direction is equal to: δ≥δmin,
where δ is the value of the relative change of maximum overall dimensions of a rib in the transversal direction, δmin - minimum value of a relative change of the maximum overall dimensions of the rib in the transversal direction, at which assembly of a pipe and creation of elastic deformations in the ribs are ensured. The invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.
EFFECT: the invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.
FIELD: heat-exchange equipment.
SUBSTANCE: heat-exchange apparatus has supplying and removing collectors integrated by group of heat-exchange tubes having protrusions at their surfaces. Protrusions are made in form of sheets connected by their side surfaces with surface of tube along the length being equal to 1,5-3,0 thickness of sheets. Protrusions are disposed tangentially to surface of tube tat the points of connection of those sheets with tubes. Several sheets are fastened to tube along the perimeter of cross-section to overlap each other. Protrusions on surfaces of heat-exchange tubes are made in form of several sheets of different lengths being fastened along their side surfaces by welding or soldering along the whole length of surfaces of heat-exchange tubes. Protrusions in form of sheets fastened to surfaces of heat-exchange tubes can be also made to have slots and curves relatively sheets at adjacent, neighboring parts.
EFFECT: improved efficiency of heat exchange; provision of adjustment of heat flow.
7 cl, 12 dwg
FIELD: heat power engineering.
SUBSTANCE: method comprises setting the core and ribs into the piping blank. The core is hollow, and each of the ribs are made of a hollow body defined by the rotation of a figure composed of the straight sections interconnected to form a hexagon. After setting the ribs, they are subjected to the flexible deformation by bringing the sides of the rib together. The sides of the ribs are perpendicular to the axis of the pipe and point in the direction of the pipe axis.
EFFECT: enhanced efficiency.
FIELD: the invention is designed for application in the field of heat-and-power engineering namely in finned heat-exchanging tubes of a gas air cooling apparatus.
SUBSTANCE: the apparatus has the body of a heat exchanging tube and an exterior finning which form in the transverse cooling flow of the exterior heat exchanging environment plots of shading of various intensity in a conditioned flatness normal to the vector of the mentioned flow of the exterior heat exchanging environment and passing through the central longitudinal axle of the tube: complete aerodynamics shading corresponding to the square of projection on the referred flatness of the unit of the length of the actual body of the tube without taking the finning into consideration and incomplete aerodynamics shading corresponding to the total square of projections on the referred flatness of the plots of finning of the unit of the length of the finned tubes limited from each side with a conditional direct line tracing along the tops of the fins minus the square of complete shading produced by the body of the tube without taking the finning into consideration. At that the connection of the squares of projections on the referred flatness of the plots of shading of various intention to their sum forms correspondently (0,30-0,80): 1 and (0,21-0,79):1 and the medium value along the radius of finning of the specific square of aerodynamics shading on the plots of projection of finning on the referred flatness on the unit of the length of the tube composes 0,08-0,55.
EFFECT: allows to increase thermal aerodynamics characteristics of finned heat exchanging tubes and thermal effectiveness of the apparatus in the whole and also to decrease metal consuming and the dimension of the construction of the beam of heat exchanging tubes of the gas air cooling apparatus.
15 cl, 4 dwg
FIELD: heat-exchanging equipment, particularly for combustion engine radiators and for other heat-exchanging facilities using gaseous coolant.
SUBSTANCE: heat-exchanger comprises coolant pipes and cooling plates provided with corrugations and cuts. The pipes are formed of brass and copper corrugations extend in longitudinal direction. The corrugations are used as turbulence promoters and define channels for gaseous coolant circulation. The plates are formed of copper strip.
EFFECT: increased heat dissipation.
FIELD: heating engineering, particularly tubular air heater production.
SUBSTANCE: method involves bending metal strip to form tube and performing longitudinal welding thereof. Before strip folding identical depressions with predetermined geometrical parameters are formed on strip surface corresponding to inner tube surface. The strip edges adapted for following welding are free of above depressions. The depressions are formed by cold stamping along the full tube length.
EFFECT: increased manufacturability, possibility to produce tube of small diameter.
FIELD: mechanical engineering, particularly support metal structures used in air cooling plants.
SUBSTANCE: support structure comprises rod-like post members and cross-bars. The cross-bars form horizontal grid-like structure with three longitudinal and transversal belts creating support parts for heat-exchanging sections of gas air-cooling plant supporting. The grid-like structure also creates chambers for fans installation. The fans are mounted on support plates suspended by rigid braces forming four-disc three-dimensional system. The posts include posts of two kinds, namely intermediate and corner ones. Intermediate posts are flat V-shaped. Corner posts are three-dimensional and consist of vertical branches and two inclined branches adjoining lower part of vertical branch. The inclined branches are arranged in two mutually perpendicular planes. Intermediate post and corresponding parts of longitudinal belt form triangle so that distance between post branch ends corresponds to distance between adjacent support plates of chamber for fan installation. Angle between inclined and vertical branches of corner post is determined from a given relation.
EFFECT: reduced material consumption and labor inputs for support structure and support structure components erection.
8 cl, 3 dwg
FIELD: heating engineering.
SUBSTANCE: developed heat-exchange surface can be used in heat exchangers, steam and hot water boilers, and boilers-exhausts. Developed heat-exchange surface has heat-exchange surface and set of hollow rods disposed inside holes of heat-exchange surface. Edges of rods are plugged at the sides from where the heat is supplied. Set of hollow rods can be disposed along both sides of heat exchange surface or only at the side from where the heat is supplied. Heat-exchange surface has cylindrical or flat shape.
EFFECT: improved accrual of heat exchange.
7 cl, 12 dwg
FIELD: heat power engineering.
SUBSTANCE: invention can be used in thermoelectric plants and boiler rooms, at transportation and storage of materials whose viscosity depends on temperature. According to invention, proposed device contains pump, external heater, suction branch pipe, pressure pipeline and jet head, and guide member. Guide member is made of cylindrical, conical pipes or their combination, including telescopic pipes and is provided with blind, plate and separate baffles. Guide member is arranged in reservoir between its bottom and surface of fuel oil in reservoir.
EFFECT: increased area of fuel oil heating (in reservoir) to temperature not lower than required temperature without additional consumption of power.
5 cl, 7 dwg
FIELD: heat exchange.
SUBSTANCE: cylindrical cooler comprises solid radiator made of an alloy with shape memory effect. The radiator is shaped into a cylinder. The cylinder is preliminary rolled with respect to the axis of rotation in the thermoplastic region by an angle close to the limit one. At a critical temperature, the cylinder is unrolled. The cylindrical shape of the radiator is recovered under the action of thermoelastic force. When the temperature of the cylinder exceeds the critical temperature, the cylinder cools and absorbs the excess of heat.
EFFECT: enhanced efficiency.
FIELD: power industry.
SUBSTANCE: plated element for heat exchanger includes core material and one or more layers of side material laminated on one of its sides or both of its sides. Multiple small grooves (B) which are periodic and arc-shaped in longitudinal direction of side material are formed on surface of side material (A). Grooves are spread to external peripheral edge of side material and have curvature radius of 800-1500 mm and period (D) of 1-8 mm in the above direction. Roughness of surface of side material (A) comprises 1-15 mcm as per the average at 10 roughness points (Rz). Side material is made by cutting the ingot into material of the specified thickness and alignment in horizontal position with longitudinal direction of the cut material. Centre of rotating disc device corresponds to ingot centre as to width. Occurrence of bad adhesion between material of core and side material is prevented due to controlling the state of surface and flatness of side material.
EFFECT: improving corrosion resistance of plated element and increasing the heat exchanger obtaining process efficiency.
8 cl, 7 dwg, 1 tbl, 14 ex
FIELD: power industry.
SUBSTANCE: sectional heating radiator includes supply and discharge aluminium headers for heat carrier passage and aluminium tubular sections as heat sinks; the new feature is that external and internal surfaces of heat sinks, as well as internal surfaces of supply and discharge headers are provided with coating from aluminium oxide, which is applied by plasma chemical method; at that, coating thickness of external surfaces of heat sinks is 5…10 mcm, and that of internal surfaces of headers is 20…100 mcm.
EFFECT: increasing radiation coefficient, which allows reducing the surface area of radiators, reducing the number of sections or heat carrier flow rate, reducing corrosion and erosion wear and improving ornamentality without any additional coating.