The heat exchanger with variable surface area
The invention is intended for use in heat technology, and it can be used in the design and operation of heat exchangers, power plants, heating, process plants and in the construction of automotive internal combustion engines. The heat exchanger contains a camera, nozzles, pipes and sealing device, and according to the invention the heat exchanger consists of mobile and stationary cameras with connected pipes and rigid pipes with fins or without inserted into each other, having inner and outer seal, to control the operation of the heat exchanger is carried out by the Executive mechanism through the bracket attached to the mobile camera. The claimed invention allows to improve thermal and dynamic characteristics of the work, to intensify the heat transfer and the possibility of automatic control of thermal processes in heat exchangers regenerative type. 3 Il.The invention relates to heat engineering and can be used in the design and operation of heat exchangers of power plants, heating and technological ustanavlivaemymi the heat removal, containing two coaxially arranged one within the other chamber, configured to move the inner chamber relative to the stationary outer.The disadvantage of this heat exchanger design is the complexity and lack of intensity regulation of the process of heat exchange.A known heat exchanger (A. S. No. 769288, USSR, MKI F 28 D 15/00, 1978), containing heat pipes placed in the tube sheets.The disadvantage of this heat exchanger is low reliability and lack of regulation of the temperature of the secondary coolant when changing the parameters of the primary.Also known heat exchanger (A. S. No. 987355, USSR, MKI F 28 D 15/00, 1981), containing camera for taloudelliset and teplovosprinimajushchie environments separated composite tube plate in which are fixed package heat pipes.The disadvantage of the heat exchanger is insufficient heat transfer rate.A known heat exchanger (A. S. No. 1101661, USSR, MKI F 28 D 15/00, F 28 F 27/00, 1984) containing chamber for heat and teplovosprinimajushchie environments separated composite tube plate in which are fixed packages, heat pipes, and for the intensification of heat transfer by temperature control teplovodenergia by means of the actuator, and the camera heat protection output equipped with a contact thermometer connected through a regulator to the actuator travel package heat pipes.The disadvantage of this heat exchanger is that it is a shell-and-tube apparatus, the scope of which is limited, in addition, the design of the device bulky and provides the intensification of heat exchange process only one working body.A known heat exchanger (A. S. No. 1160223, USSR, MKI F 28 D 7/00, F 28 D 15/02, F 28 F 27/00, 1985) containing chamber for heat and teplovosprinimajushchie environments separated composite tube plate in which are fixed packages, heat pipes, and for the intensification of heat transfer in change in the flow rate heat medium heat exchanger contains a bundle of rods placed in the annular space can be moved by means of the actuator, the camera for teplovosprinimajushchie environment supplied installed at the inlet of the last electric contact pressure gauge, connected through the regulator to the actuator moving beam rods.The disadvantage of this heat exchanger is that it is a shell-and-tube apparatus, the scope of which is limited, in addition to the mu body and does not allow to intensify the heat transfer through the fins of the heat exchanger.The closest prototype is a heat exchanger lubrication system of internal combustion engine (Patent RF №2149268, F 01 M 5/00, 2000), representing the heat exchanger with variable surface heat transfer in the oil circuit of which there is a mechanism consisting of a spring, telescopic rod and piston defining a chamber connected with the exhaust manifold of the engine through an electromagnetic valve controlled thermal sensor oil temperature. In a liquid loop heat exchanger, simultaneously included in the engine cooling system through electromagnetic valves controlled thermal sensor coolant temperature, placed tube gas circuit communicated with the air inlet, through the check valve and the intake and exhaust manifold through the solenoid valves are controlled from a temperature sensor oil.The disadvantage of the prototype design is the complexity of the heat exchanger with variable surface area, a large number of solenoid valves that control its operation, and the presence of other elements that reduce the reliability of the system. In addition, the disadvantage is that as the heat exchanger with variable area see heat transfer.The aim of the invention is to improve the temperature and the dynamic performance of the work, intensification of heat transfer and the possibility of automatic control of thermal processes in heat exchangers regenerative type.The claimed heat exchanger contains a camera, nozzles, pipes and sealing device, and according to the invention the heat exchanger consists of mobile and stationary cameras with connected pipes and rigid pipes with fins or without inserted into each other, having inner and outer seal, to control the operation of the heat exchanger is carried out by the Executive mechanism through the bracket attached to the mobile camera.The heat exchanger consists (Fig.1) of a movable camera 1 and 2 fixed to which is connected a branch pipe 3A and 3b. The camera 1 is welded (or soldered) tube 4 with internal fins or without him and inserted into the pipe 5 having external fins and is rigidly attached to the camera 2. Inner sealing pipes 4 and 5 (Fig.2) is carried out by means of the piston 6 having grooves for o PTFE or rubber rings 7 and check valves, consisting of locking balls 8 and prog placed in region II (Fig.1), through the lid 10 (Fig.3), which screw on the thread executed on the ends of the pipes 5, sealing washers 11 and the sealing rings 12.To ensure operation of the heat exchanger (Fig.1) fixed camera 2 is attached by the bracket 13, and the drive of the heat exchanger by the actuator through a bracket 14 attached to the mobile camera 1.Does the heat exchanger is as follows. Teplopodvodyaschey environment, passing through pipe 3A, gets into a stationary camera 2, where filling its internal volume flow through the pipes 5, and then, meeting in its path resistance in the form of a piston 6, is directed into the pipe 4. Then teplopodvodyaschey medium enters into the sliding chamber 1, where through the nozzle 3b leaves the heat exchanger. When this heat medium pipes washed 4 and 5 with the outer surface, providing heat removal from teplopodvodyaschey environment.Temperature control is as follows. If the temperature teplopodvodyaschey environment below the limit regulation, enforcement mechanism, which can be used, for example, the hydraulic cylinder acts on the bracket 14, and through it to the camera 1. This Troum, prevent process of heat transfer. As overheating teplopodvodyaschey environment, the actuator pushes the camera 1 and 2 of the heat exchanger, the tubes 4 out of the pipes 5 and increase the cooling surface of the heat exchanger, resulting in between teplopodvodyaschey and heat environment intensifies the heat exchange process.
ClaimsA heat exchanger containing chambers, nozzles, pipes and sealing device, characterized in that it consists of mobile and stationary cameras with connected pipes and rigid pipes with fins or without inserted into each other, having inner and outer seal with the operation of a heat exchanger carried out by the Executive mechanism through the bracket attached to the mobile camera.
FIELD: heat power engineering.
SUBSTANCE: according to proposed method, inner pipe is fitted into outer pipe after shape-treatment of at least outer surface of inner pipe or inner surface of outer pipe, and after fitting inner pipe outer pipe, inner pipe is expanded to bring outer surface of inner pipe in tight contact with inner surface of outer pipe, and shape-treatment of surface forms at least one channel to reveal leakage between two pipes. Before fitting in pipes at least outer surface of inner pipe or inner surface of outer pipe is coated with layer of solder, for instance, tin, and inner pipe is expanded so that outer pipe also expands, and solder layer between inner and outer pipes is melted. Outer pipe is expanded so that melted layer of solder is forced out from space between inner and outer pipe at least intone channel to reveal leakage. Such heat exchange pipe contains assembly unit consisting of outer pipe and inner pipe fitted at tight contact in between and at least one channel to reveal leakage passing in contact surface and near the surface between inner and outer pipes. Thin film-like layer of solar material, such as tin, is provided in place of contact between inner and outer pipes which, owing to melting, connects with inner pipe and outer pipe, inner and outer pipes adjoining with displacement. Invention makes it possible to increase heat transfer to value equal to or practically equal to that of solid heat exchange pipe and channel to reveal leakage remains free from filling medium, thus providing accurate and reliable revealing of leakage.
EFFECT: improved reliability.
15 cl, 6 dwg
FIELD: baking industry.
SUBSTANCE: proposed plant includes trap hood and heat exchange cooling unit connected with it and mounted under it; cooling unit includes jacket with pipe line located over its center. Heat exchange cooling unit is used for forced circulation of cold air between jacket and pipe line inside it directing the flow in required direction: in cold season outside air is delivered and at hot season air from floor areas is delivered.
EFFECT: simplified construction; enhanced ecology; saving of water.
FIELD: heat-exchange apparatus.
SUBSTANCE: air cooler comprises vortex heat exchangers, pipes of the vortex heat exchangers for flowing air to be cooled flows, swirlers, and actuator of purifying mechanisms. The actuator has hollow driving shaft mounted in the pipes and provided with a longitudinal groove throughout its length. The groove receives unmovable screw with a nut coupled with the bushing freely mounted on the shaft through a key. The brush holder with brushes are secured to the bushing. The outer side of the pipes of the vortex heat exchangers are provided with chutes for circulating a coolant. The vortex heat exchangers has a fining with a coefficient that varies according to the relationship where D is the diameter of the pipe, n is the number of chutes, and l is the chute width. The parameters vary in the following range: D = 50-800 mm and l = 20-50 mm. The chute height l1 =3-40 mm, the thickness of the pipe wall and the thickness of the chute wall
EFFECT: simplified structure and enhanced reliability.
5 cl, 7 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.
FIELD: heat exchange apparatus.
SUBSTANCE: surface heat exchanger comprises casing provided with bearing lags, lens compensator, pipe bench with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle that divides it into two sections. One of the sections is provided with the branch pipes for supplying and discharging of the fluid to be heated, and the other section defines the back water chamber. The pipe bench inside the housing is separated by the horizontal baffle provided with the by-pass port interposed between the lens compensator and back water chamber. The top and bottom sections of the pipe bench are separated with the vertical baffles arranged symmetrically to each other.
EFFECT: improved heat exchange and enhanced heat power and reliability.
FIELD: methods of treatment of fluocarbon raw.
SUBSTANCE: the invention is pertaining to the methods of treatment of fluocarbon raw. The method of treatment of fluocarbon raw provides for heating by means of high frequency induction of a heating zone of a reaction chamber up to the temperature of no more than 950°C, heating in the heating zone of fluocarbon raw, which contains at least one fluocarbon compound, so, that the fluocarbon compound dissociates with production of at least one predecessor of fluocarbon or its reactive kinds; and refrigerating of the predecessor of fluocarbon or its reactive kinds, in the result of which from the predecessor of fluocarbon or its reactive kinds forms at least one more desirable fluocarbon compound. The technical result is conversion of the fluocarbon raw into the useful products by the low-cost reliable non-polluting environment universal and easily controlled method.
EFFECT: the invention ensures conversion of the fluocarbon raw into the useful products by the low-cost reliable non-polluting environment universal and easily controlled method.
12 cl, 10 dwg, 3 tbl, 2 ex
FIELD: heat engineering, applicable in heat exchanging apparatus with recuperative heat transfer in various branches of industry.
SUBSTANCE: the heat exchanger has a body with pipe-branches for feeding and discharging the working media and ducts for the heat transfer agents formed by the ribs adjoining the body shell, the body is made in the form of a cylindrical shell enclosing the heat exchange surface made as a double screw thread with formation of two screw ducts of the same section separated by a wall serving as a rib of the heat exchange surface, feed and removal of heat-transfer agents are accomplished by means of manifolds, in which partitions are installed for separation of the flows of heat-transfer agents, besides, the roughness of the heat exchange surface makes it possible to use viscous heat-transfer agents, and at feeding of heat-transfer agents to the screw ducts separation of the heat-transfer agents is not required.
EFFECT: enhanced operating reliability and intensification of heat exchange.
SUBSTANCE: apparatus can be used in steam and liquid cooling systems. The heat exchange apparatus consists of external and internal pipes, installed at an angle of 0-85° to the horizontal and arranged concentrically relative each other, each of which is equipped with sockets for input and output of the heat carrier. The internal pipe is divided into sections, made with the provision for interconnection of the sections through overflow openings, made in the form of segmented apertures in the intersection partition walls, installed with alternation of these openings upwards and downwards, and made in the form of segmented diaphragm. The segmented openings are formed in the space between the wall of the internal pipe and the diaphragm, and the overflow thresholds of the partition walls are parallel to each other and relative the horizontal.
EFFECT: simple structure.
SUBSTANCE: invention relates to "pipe-in-pipe"-type heat exchangers and can be used in various industrial branches. The proposed heat exchanger comprises an inner pipe with external cylindrical ribs representing hollow pipes and turbulator mounted thereon and representing a helical tape coiled on the rod, a tangential branch pipe to feed intertubular medium and that to discharge aforesaid medium. Note here that straight cylindrical ribs, arranged all long the heat exchanger length, are fitted on the inner pipe outer surface with the help of bent metal plates and brought out into common branch pipes of feeding and discharging inner pipe medium via tube plates.
EFFECT: simplified mounting/dismantling, intensified heat exchange, reduced costs of clearing pipes.
FIELD: heat-and-mass transfer.
SUBSTANCE: invention relates to devices designed to cool fluids and distributor thereof, as well as to methods of clearing and sterilising such apparatuses. Proposed device comprises primary heat exchanger, secondary heat exchanger, 1st pipeline for fluid to be cooled to circulate therein. It comprises heat carrier to transfer cooling power to fluid to be cooled that circulates in the 1st pipeline. Note here that aforesaid primary and secondary heat exchangers are arranged, at least, partially, one into another. Note also that primary heat exchanger comprises the 2nd pipeline that passes together with secondary heat exchanger 1st pipeline and around it and along, at least, a portion of the length of aforesaid pipeline. The proposed device additionally comprises fluid source and, at least, one distributor valve. Note here that the said distributor incorporates a cooler implemented in compliance with one of the described versions. Proposed method of sterilising cooled fluid comprises the steps that follows, i.e. draining fluid from the chamber with primary heat exchanger heat carrier, or draining fluid from the 2nd pipeline carrying primary heat exchanger hear carrier, draining fluid from the 1st pipeline that carries fluid to be cooled and distributed, sterilising the 1st pipeline during the period sufficient for killing bacteria and sterilising.
EFFECT: higher efficiency and simpler servicing.
53 cl, 4 dwg