Cross-exact heat exchanger
(57) Abstract:Usage: in heat technology, namely heat exchangers cross-exact type mainly for gaseous fluids with high temperature difference. The inventive cross-exact heat exchanger includes a plate pack with intermittent longitudinal ribs formed on the surface of the plates separate sites with the same pitch of the fins on each of them and decreasing from plot to plot in the direction of flow. The site located at the outlet of the heat carrier may have additional turbulizers notching. 1 C.p. f-crystals, 3 ill. The invention relates to heat engineering, namely the heat-exchange apparatus with large temperature difference between two fluids at the inlet of the heat exchanger.Known plate perekrestnotochny heat exchanger.with. 1598592, CL F 28 D 9/00, 1988), contains a package of flat sheets and placed between sheets of corrugated plates with the formation of the Central and peripheral channels for flow Teploobmennik environments, and channels provided dokhtaraye spacers, which number in the peripheral channels is increased.Neotr environments at the entrance to the apparatus, and a large unevenness of temperature field in the heat exchanger. This temperature non-uniformity leads to cracking of welded and soldered joints and to decrease the efficiency of the device.Known plate perekrestnotochny heat exchanger (application Germany N 3345558, CL F 28 D 9/02, 1985), containing a set of plates with longitudinal ribs, and the heat exchange surface formed between the edges of the channels is changed in the direction of flow. As shown by calculations and experiments, the known technical solution does not lead to the desired alignment of the field of temperature in the body of the plates and in the cross section of flow at the outlet of the channels of the heat exchanger.To reduce thermal stress in the design of heat exchanger and maintaining its efficiency, and alignment field temperature at the outlet of the apparatus and in the body of the plates serves to increase the intensity of heat exchange process is not across, and along the stream Teploobmennik environments by performing longitudinal edges discontinuous with the formation of separate sites with the same pitch of fins in each of them and decreasing from plot to plot in the direction of flow.The degree of intensification of the process of heat transfer can be increased as is resti, and by performing, for example, on sites located at the exit of the apparatus of slots.In Fig.1 presents a diagram of the inventive heat exchanger of Fig. 2 a top view of one of the plates of the inventive heat exchanger, from which it is evident how made separate areas and decreases as the step between the ribs; Fig.3 notching the ribs on the last section.Cross-exact heat exchanger includes a plate 1 for duct cooling medium and the plate 2 to duct the cooling medium. To increase the degree of intensification of the process of heat transfer and increase the strength, and hence the reliability of the apparatus in plates 1 and 2 are made of the ribs 3, the number of which the flow of the coolant is increased by installing additional ribs 4 and 5. Ribs can be made discontinuous and divided into separate sections with the same step in them, which decreases from plot to plot in the direction of flow.With the changing flow step plots can be made according to a cooled or chilled environments, and in both environments simultaneously. On the edges of the plots located at the outlet of the apparatus can be done is tensification which along the flow increases. This leads to the alignment of the field of temperature in the body of the plates, and in the cross-section of heat flow at the exit of the channels of the heat exchanger. In turn, such an equalization of temperature fields will not only simplify the technology of the batch of wafers, but also to use in the heat transfer medium with a significant difference in the temperatures of the flows at the entrance to the heat exchanger. 1. Cross-exact heat exchanger containing a set of plates with longitudinal ribs, and the heat exchange surface formed between the plates of the channels is changed in the direction of flow, characterized in that the longitudinal ribs are made discontinuous with the formation of separate sites with the same pitch of the fins on each of them and decreasing from plot to plot in the direction of flow.2. The apparatus according to p. 1, characterized in that the ribs on the plots located at the outlet of the heat carrier, made with rents.
FIELD: agriculture: heat engineering equipment for poultry and stock-rearing.
SUBSTANCE: the invention is dealt with the field of agricultural heat engineering equipment ensuring a heat transfer from one heat-exchanger to another in presence of aggressive corrosion-influencing components in one of them. The equipment may be used in the gas-air ventilation facilities of heat recovery in poultry and stock-rearing farms. The method of production of a cross-running heat exchanger out of a polymeric material containing a package made out of polymeric cellular plates bound to each other and encased in a box ensuring an inlet and an outlet of warm and cool air streams. At that the cellular plates located in one direction in a package are bound to each other by a two-sided polymeric adhesive tape through gaskets made out of the same polymer and placed along the surface and perpendicularly to directions of cells in a plate, are kept till full polymerization of the joints with following formation of the package on all its corners with metal angle sections into a rigid metal framework. At that in one of the vertical sides of the angle section they drill some bores ensuring a free running of a liquid. Then using a sliding fit the package is inserted in the guides made out of the angle sections and mounted perpendicularly to the corners of the air-distributive box so, that the bores of the lower corner of the package meet the bores of a lateral wall of a guide. The package is fixed in the guides formed by the metal angle sections. The bores of the lower angle section of a guide should be located opposite to the bores drilled-in in the lower wall of the air channel of the box placed above a draining container. The invention ensures the necessary tightness of the channels linking the heat exchangers, possibility to use the heat exchangers at low temperatures and also to increase the cost efficiency of the polymeric material cutting.
EFFECT: the invention ensures the necessary tightness of the channels linking the heat exchangers, possibility to use the heat exchangers at low temperatures and increased the cost efficiency of the polymeric material cutting.
FIELD: gas turbine construction.
SUBSTANCE: matrix can be used in heat exchangers of heat regeneration heat system's exchanger, as well as for warming up (cooling down) gas or liquid in different heat-sing installations. Matrix of ring-shaped lamellar heat exchanger has heat-exchange members formed by lamellar plates with corrugated parts and openings of collectors, which are connected by means of lugs of internal and external diameters of plates or by means of lugs of collectors. Corrugated parts and collectors are limited by internal and external diameters of ring-shaped plate, or by lines being equidistant to them, and by frontal planes being parallel to axis of symmetry of corrugated parts. Axes of symmetry of any part and of collectors pass through center of plate. Angles between frontal planes of distributing and gathering collectors are equal to each other. Vertexes of angles are disposed at concentric circles having the same or different radiuses. Area of distributing collector relates to gathering collector is directly proportional to relation of corresponding radiuses of vertexes of angles and belongs to 0,4-0,8 interval.
EFFECT: improved efficiency of operation of heat exchanger.
2 cl, 7 dwg
FIELD: mechanical engineering; air conditioning and ventilation.
SUBSTANCE: invention relates to heat exchange devices used in air conditioning and ventilating plants, namely, to methods of evaporating cooling to dew point and to plate devices for evaporative cooling. According to invention, plates of plate device are made so that channels and perforation to pass from dry side to wet side can be at least partially wetted with evaporating liquid. Chute is provided made in part of plates which temporarily holds evaporating liquid in contact with wick material on surface of wet side of plate. Evaporating liquid flows along chute through perforation for liquid into following chute. When chute of plate from wet side is from above, perforation for liquid is on side forming reservoir for wetting opposite wick materials. When flow move along dry side, heat is conveyed to plate. In proposed method several heat transfer plates are used. Said plates have wet and dry sides and they form chutes. Plates are wetted form wet sides with evaporating liquid and they pass separately two flows, namely, working and product ones through dry sides. Flow of working gas passes along dry side and gets through perforation into channels on wet side which is cooled owing to evaporation, thermal conductivity of plate and its heat radiation.
EFFECT: provision of more effective air flow and heat transfer owing to evaporative cooling with intermediate coolant.
SUBSTANCE: invention is referred to thermal engineering and may be used in district heating systems for heating service water. Heat exchanger contains primary circuit channel located between inlet and outlet connections, secondary circuit channel located between supply pipeline assembly and return pipeline assembly, heat-conducting device between primary circuit channel and secondary circuit channel, and temperature sensor. Temperature sensor is located between secondary circuit channels close to connection with return pipeline. Besides, temperature sensor contacts with heat-conducting device or situates at small distance from it.
EFFECT: space saving in heat exchanger when temperature is measured and good results are achieved.
7 cl, 5 dwg
FIELD: heating systems.
SUBSTANCE: inventions are intended for heat exchange, and can be used for heating heat carriers. Heat exchanger core consists of two groups of alternating plates. The latter are connected to each other and each plate in each group is made at least in one of its surfaces at least with three platelets, each of which consists of a group of parallel channels, holes passing through the first and second group of plates for transferring fluid heat carriers to the platelets and from them, and distributing channels connecting opposite ends of each platelet in each of the plates to some of the holes related thereto. Distributing channels that are connected to each of the platelets in the plates of the first group are located so that they cross the distributing channels that are connected to some of the appropriate platelets in the plates of the second group. Heat exchanger can include at least one core. Heat exchanger can include headers connected to the core. Heat exchanger can include at least two cores. In heat exchanger the cores are attached rear side-to-rear side, and headers are connected to assembly for transferring fluid heat carriers to the cores and from them.
EFFECT: providing required thermal efficiency, and decreasing dimensions and mass of heat exchanger.
31 cl, 16 dwg
SUBSTANCE: invention is of relevance for operation of apparatus for air cooling of gas and is to be utilised in power engineering industry. The proposed method of the heat exchanger apparatus fabrication envisages the following activities: fabrication of finned heat exchange tubes, a framework, at least a single apparatus section with lateral walls and beams joining them together, gas inlet and outlet chambers; packing the section with a bundle of finned one-way-flow heat exchange tubes; fabrication of a manifold for gas supply and removal, a support structure and their assembly. The section walls are represented by channel bars with shelves turned towards the tubes and are equipped with fairing displacers forming the U-bar reinforcement ribs. One of the methods of the apparatus heat exchanger section fabrication envisages positioning an optimal number of tubes within the section in accordance with the dependence specified within the framework of the invention concept. An alternative method envisages assembly of the section elements on a holding frame designed within the framework of the invention concept. A third method envisages assembly of the elements in a specific sequence combined with performance of hydraulic pressure testing. The method of fabrication of the apparatus chamber for gas inlet or outlet envisages manufacture of the chamber elements and their assembly in a sequence developed within the framework of the invention concept. The method of fabrication of the gas delivery and removal manifold envisages manufacture of the manifold body sections and their assembly with the help of the tool tab designed within the framework of the invention concept. Method of hydraulic pressure testing of the apparatus sections envisages mounting the section to be tested on the hydraulic test bench designed within the framework of the invention concept with the pressure increase and drop modes as per the dependence given. Method of the manifold hydraulic pressure testing envisages it being mounted on the hydraulic test bench or a loft with the help of support structures designed within the framework of the invention concept.
EFFECT: enhanced effectiveness and precision of assembly of the apparatus and elements thereof combined with reduction of labour and material consumption, reduction of hydraulic losses occurring in the apparatus as well as technological simplification of the hydraulic pressure testing of heat exchanger sections and manifolds of the apparatus for air cooling of gas, improved effectiveness and reduced labour intensity of their performance.
25 cl, 30 dwg
SUBSTANCE: proposed multi use plate of the plate heat exchanger contains the following: the extreme and middle parts, lying in the first plane; the rib, mating these parts, the middle of which lies in the second plane parallel to the first; the first and the second pairs from the first and the second holes same in size on the opposite sides of the middle part. These pairs of holes are positioned mirror-wise relatively to the transverse axis, passing in the first or the second plane equidistantly between the pairs of holes; at that the first and the second hole in each of these pairs of holes are formed in the sections of the middle part, lying respectively in the first and the second planes; the entire space of the middle part between the sections with holes is occupied by alternating recesses and protruberances, at that the recesses bottom and the protuberances tops are lying respectively in the first and the second planes. The package assembly of such plates consists in consequent plates packing one by one with the similar planes with the rotation of each even or each odd plate by 180° relatively to the transverse axis, after that provide the plates welding in the contact places of their similar planes. The turbulizing elements can be placed in some of the forming cells, that allows to change the hydro-gasdynamic and heat-mass exchange characteristics of the working channels.
EFFECT: operating means range expansion.
8 cl, 3 dwg
FIELD: applicable in devices for conduction of heat exchanging processes between two media through a wall, in particular, in chemical, food, petroleum refining branches of industry.
SUBSTANCE: the heat exchanger plate bunch has a heat exchanger bank assembled of plane-parallel plates with bundles welded in pairs in boxes fixed at the ends in tube plates with a clearance to one another and forming tubular and intertubular ducts for input and output of the hot and cold products, two plane-parallel plates with partitions for overlapping the free area of the cross-section between the plate and the body of the heat exchanger, seal belt and a detachable mounting-transport support, the heat exchanger bank is made of several successively connected modules, each provided with two side shields made in the form of plates located along the bank, except its terminal zone, and secured on the plane-parallel plates, tube and intertube headers are formed in the zones of connection of the modules. Besides, in the bunch of the plate heat exchanger the tube header is made in the form of closed plane in the central part of the bank of the adjacent modules, and the intertube header is made with two channels, one channel on each lateral side of the bank, each channel is formed by an additional shield that is mounted in the terminal zone between the shields of the adjacent modules and connected to these shields and to the plane-parallel plates. The section of each channel of the intertube header is made in the form of a segment restricted from one side by the arc of the additional shield, whose radius equals half the diagonal of the bunch section, and from the other side - by a chord, whose length equal the width of the shield plate. The seal belt is made in the form of a cylinder-shaped obturator and installed in the zone of product output from the intertube channels.
EFFECT: simplified procedure of manufacture, transportation and mounting of the bunch in the body of the heat exchanger, improved conditions of heat exchanger sealing at passage of the heat exchange products through it, reduced expenditures on manufacture.
8 dwg, 4 cl
FIELD: heat power engineering, machine engineering, possibly manufacture of members of heat exchanges or reinforcing members.
SUBSTANCE: ribbed sheet panel includes base made of metallic sheet and having outer ribs welded to base by action of HF-currents. Base has protrusions on its rear side. Relation of protrusion height to thickness of base is in range 0.8 - 2.0. In order to make such panel, cylindrical blank of metallic sheet being base of panel is shaped to helix. Ribs are welded by means of HF- currents to outer side of base along helix. Then ribbed panel is developed till predetermined curvature radius. On rear side of panel base protrusions are made by pressing-in ribs at process of their welding to outer side of base and(or) by forming.
EFFECT: enhanced operational characteristics of panels.
8 cl, 2 ex
FIELD: power industry.
SUBSTANCE: circuit for cooling high-beat areas of structures consists of internal profiled shell, on external surface of which there are made ribs of cooling circuit, and of external profiled shell installed on internal one and bound with it by tops of ribs of cooling circuit. Hollow bridges interconnecting tops of ribs are made between ribs of the cooling circuit. Also bridges interconnect tops of all ribs forming single circular surface to increase stability of shells. For improvement of conditions of heat release lengthwise ribs are made on internal fire surface of the internal shell.
EFFECT: increased stability and durability of internal and external shells.
3 cl, 2 dwg
FIELD: power industry.
SUBSTANCE: circuit for cooling high-beat areas of structures consists of internal profiled shell, on external surface of which there are made ribs of cooling circuit, and of external profiled shell installed on internal one and bound with it by tops of ribs. Blades parallel to a bottom of a slot are made on tops of the circuit ribs; also external profile of blades corresponds to internal profile of the external shell. Blades tie tops of two adjacent ribs between them to increase strength and stability of shells. Also blades interconnect tops of all ribs forming single circular surface. For improvement of conditions of heat release lengthwise ribs are made on internal fire surface of the internal shell.
EFFECT: increased stability and durability of internal and external shells.
4 cl, 4 dwg
FIELD: power engineering.
SUBSTANCE: corrugated insert for a plate heat exchanger comprises double-sided asymmetrical hollows made as rounded along a rounding radius and forming narrowing sections of each channel, arranged with an equivalent hydraulic diametre making 0.65-0.92 of an equivalent hydraulic diametre of a smooth section of the channel, with the height of a corrugation channel, equal to 4-6 steps of corrugation ribs, the ratio of the value of the outer radius R of coupled surfaces of double-sided asymmetrical bores forming adjacent and smoothly rounded ledges and grooves of asymmetrical bores transverse to direction of the coolant flow, to the value of the equivalent hydraulic diametre of the smooth section of the channel d is equal to 0.05-0.20 (R/d=0.05-0.20), at the same time the maximum length n of the section of transverse ledges and grooves at corrugation ribs is determined as the distance between areas of coupling with radius R1 of side faces of the section of transverse ledges and grooves of double-sided asymmetrical bores with corrugation ribs, at the same time coupling of side faces of the section of double-sided asymmetrical bores with corrugation ribs along the coupling radius R1 is arranged at the distance k from the area of coupling of the radius part of corrugation tops with their ribs, equal to or more than the value of the half of the inner rounding radius of corrugation tops R2 (k≥0.5*R2), and sections of side faces of transverse ledges and grooves of asymmetrical bored are arranged in the form of coupled differently directed two arcs of identical radius R1, besides, at the peripheral sections of the corrugation ribs at the coolant inlet and outlet from the corrugated insert to create smooth peripheral sections of the triangular sections there are equidistantly arranged indents of double-sided symmetrical bores with the depth h1, the value of which is twice less than the depth h2 of indents of double-sided asymmetrical bores (h1=0.5*h2).
EFFECT: higher thermal-hydraulic efficiency of a corrugated insert for a plate heat exchanger and quality of their manufacturing.
FIELD: power industry.
SUBSTANCE: plate-type heat exchanger matrix includes intermediate shaped plate-turbuliser with the same relief geometry, which is located between heat release shaped surfaces.
EFFECT: considerable increase in the ratio of flow passages of shaped channels for adjacent heat carriers and their high heat power efficiency.
SUBSTANCE: radiator includes a wall and heat exchange elements forming external and internal finning. External finning consists of straight projections alternating with passes the cross sectional area of which in upper part of the wall is smaller than in its middle part, and internal finning consists of alternating passes separated with fins and having the cross sectional area of a constant value and passes with cross sectional area of a variable value, which are made as close as possible to outside surface of the straight projection. Straight projections are located opposite passes with cross sectional area of the variable value of the internal finning. In order to mix air and increase the area of the radiator heat-removing surface, there is at least one through hole in the projections.
EFFECT: improving cooling efficiency of an electronic device.
2 cl, 6 dwg