KR200240789Y1 - apparatus for increasing a heat transfer efficiency in a heat exchanger - Google Patents

Abstract

The present invention relates to a device for increasing the heat transfer efficiency in the heat exchanger, the vibration portion is disposed in the heat transfer pipe (1) over the entire length is a longitudinal winged rod member 24 protruding out the bottom of the heat transfer pipe (1), The vane rod member 24 is connected with vibration means to actively move about and up and down the inner surface of the heat transfer tube 1; The vibration means is mounted on the motor base 14 to connect the vibration motor 13 for generating a vibration source, and the vibration source of the vibration motor 13 to the rod-mounted rod member 24, the vibration source Mechanical connection means for converting the output of the blades into vibratory movements of the vane rod members 24 along and up and down the inner surface of the heat transfer tube, whereby the vane rod members are vibrated. And a heat exchanger that physically interacts with the process fluid (II) to control the accumulation of solids from the process fluid to the inner surface of the heat transfer tube (1).

Description

Apparatus for increasing a heat transfer efficiency in a heat exchanger}

The present invention relates to a device for increasing heat transfer efficiency in a heat exchanger, and more particularly, to a vibration driver for a vibration unit used in connection with a tubular heat exchanger (heat exchanger consisting of a heat exchanger tube and a container tube surrounding them).

In the case of treating the fluid, for example, the liquid to be processed passes along one side of the heat exchange surface of the metal plate, and is different from the liquid to be treated (the first process fluid) along the surface in the other direction opposite to the heat exchange surface. It is often necessary to heat or take away the heat to be processed by passing the second process fluid at a temperature.

Such heat transfer between fluids, heat exchangers, has the effect of heating or cooling the process fluid, as in the glycol coolers commonly used in building air conditioning systems, and also producing fresh water by boiling seawater. In some cases, the fluid phase may be changed, as in the process of producing ice or by partially freezing water or an aqueous solution.

Ice has many uses, but is stored in dairy farms for low-temperature storage (cold ice or cold water) to reduce power demands at peak loads in building air conditioning systems, or to be sent to processing plants. It is also particularly useful for freezing food such as used milk and catches stored on fishing boats.

The size of the heat exchanger, and thus the manufacturing cost, is determined by the size of the heat transfer coefficient. The heat transfer coefficient is determined by the degree of resistance to heat flow through a layer of hot fluid, a heat exchange wall separating the hot fluid and a cold fluid, a layer of cold fluid and a deposit attached to the cold or hot surface of the heat exchange wall. Depend on In order to proceed with heat transfer through this heat flow resistor, for economic reasons, a fairly large temperature gradient is required. However, this high temperature gradient has a problem of lowering the energy efficiency of the evaporator or the freezer because it limits the number of stages (the number of stages) of the evaporator or the freezer or imposes high lifting conditions on the vapor compressor.

The present invention has been made to solve the above problems, the device to increase the heat transfer efficiency by driving the fluid flowing down into the thin vertical heat exchanger tube opened in the heat exchanger to perform orbital motion or shaking motion while using less power. The purpose is to provide.

1 is a cross-sectional view of an open tubular heat exchanger with a vibrating motion driven vibration member according to the present invention. <Description of the reference numerals in the drawings> 1: Heat transfer tube 2: Vessel tube 3: Vessel upper plate 13: Vibration motor 14: Motor base 15 Vibration transmission bar 16 Vibration plate 17 Vibration-proof spring 18 Bolt 20 Sleeve 24 Rod member with blade

The present invention has at least one heat transfer tube for exchanging heat radially through the tube wall of the heat transfer tube between the hot fluid and the cold fluid to achieve the above object, wherein one of the hot and cold fluids is The heat exchanger is a process fluid flowing downward in the heat transfer tube, wherein the heat exchanger includes a vibrating portion disposed in the heat transfer tube, wherein the vibrating portion is a rod member having a longitudinal wing which extends over the electric field in the heat transfer tube and protrudes outside the bottom of the heat transfer tube. The vane rod member is connected with vibration means to actively move around and up and down the inner surface of the heat transfer tube; The vibration means is mounted on a motor base to generate a vibration source, and transmits the vibration source of the vibration motor to the blade rod member, and transmits the output of the vibration source around the inner surface of the heat transfer tube. And mechanical connecting means for converting the vane rod member along the up and down oscillation motion, whereby the vibrating vane rod member physically interacts with a process fluid, thereby transferring a heat transfer tube from the process fluid. Heat transfer efficiency in the heat exchanger that controls the accumulation of solids on the inner surface of the device.

The above and other objects of the present invention are described below with reference to the accompanying drawings.

1 shows a heat transfer device or a heat exchanger 100 with a vibration member according to the present invention using the vibration movement drive mechanism of the vibration member. The heat transfer apparatus 100 basically consists of a plurality of heat transfer tubes or heat exchange tubes 1 and a container tube 2 containing them. In FIG. 1, only one heat transfer tube 1 is shown for ease of explanation, and in practice, a plurality of heat transfer tubes 1 are arranged in the container upper plate 3 and the lower container 4 in a predetermined arrangement. It can be fixedly arranged. For example, 157 of the plurality of heat transfer tubes 1 may be fixedly disposed on the upper container plate 3 and the lower container container 4.

The upper container plate 3 is formed in the upper chamber 5 in cooperation with the upper tube (2a) and the upper upper plate (3a) of the acrylic material, the lower upper plate (3b) coupled through the flange and the lower container plate (4) ) And the lower tube 2b cooperate with the tapered portion 6a to define the lower chamber 6, and the upper vessel 3 and the lower vessel 4 are the vessel tube 2 and the heat transfer tube. In cooperation with (1), the inner space of the container tube 2 is partitioned as the chamber 8. The chamber 8 is the outside of the heat transfer tube 1, that is, the vessel observation space. The inner space, that is, the space communicating with the heat transfer tube 1, includes the internal spaces in all the heat transfer tubes 1, the upper chamber 5 above the upper vessel 3, and the lower chamber below the lower vessel 4. 6).

Each heat transfer tube 1 is a thin tube formed of a material having high heat transfer characteristics such as copper or steel, and has an inner heat transfer surface and an outer heat transfer surface. You may try any surface treatment which provided the groove | channel etc. in order to improve heat transfer characteristic in the inner surface or outer surface of a heat transfer tube.

The first process medium (I) is introduced into the chamber (8) through a conduit or nozzle (9) and discharged through the conduit or nozzle (10) and through the conduit (11) the upper chamber (5) and the lower chamber (6). And a second process medium (II) which is introduced into the heat transfer pipe (1) and can be discharged through the conduit (12) and heat exchanges through the walls of each heat transfer pipe (1). For example, when applied to desalination of seawater, the second process medium II is seawater and the first process medium I is heated steam such as steam.

In the case of producing ice, the second process medium (II) is water containing an additive which promotes the formation of large ice crystals in water, and the first process medium (I) is preferably outside the heat transfer tube. It is a pressurized refrigerant that boils at the surface and produces two phases of vapor flow / foam flow. In this case, very suitable additives for addition to water include any kind of inorganic salts such as ethylene glycol (antifreeze for automobile), propylene glycol, milk, seawater, calcium magnesium acetate, sodium hydrogen carbonate that produced anhydrous crystals, and the like. have.

Each heat transfer tube 1 is provided with a blade rod member 24 which is driven to vibrate in a vibrating state in the heat transfer tube. This vibrating motion vibrates up and down the inner surface of the heat transfer pipe 1 in a state in which each rod-mounted rod member 24 is aligned with the axis of the heat transfer pipe 1 corresponding to the axis thereof. It acts to press the inner surface of (1).

The mass and frequency of the vane rod member 24 can be changed to a state apparent to those skilled in the art depending on the use, mode of operation, tube condition and size, and other factors. For example, in the case of producing ice, the direction of heat flow is directed from the inside of the heat transfer tube to the outside, so that crystals of ice are generated while the liquid cools while flowing down the inside of the heat transfer tube. In this application example, the function of the winged rod member is to crush and detach the frozen crystals attached and grown on the inner surface of the heat transfer tube 1 at the initial generation stage.

In the configuration of Fig. 1, the winged rod member 24 is preferably a longitudinal winged rod member that is self-standing in the heat transfer tube 1 and stands on its own. The wings attached to the lower part are arranged with a small distance on the outer circumference of each other, and the wings attached to the center part are arranged with a larger distance than the distance on the outer circumference between the wings attached to the upper part and the lower part.

In a preferred embodiment for the flooded mode, the vibratory motion of the vane rod member 24 is caused by the vibration motor 13 which is integrally mounted to the motor base 14.

The motor base 14 has one end of two vibration transmission bars 15 fixed to both left and right sides thereof. The vibration transmission bar 15 is prevented from leaking water through the flexible rubber bellows 30 between the motor base 14 and the upper upper plate 3a of the upper tube 2a, and the upper tube 2a. The other end is fixed to the vibrating plate 16 through the upper upper plate 3a. Between the vibration plate 16 and the container upper plate 3, there are dustproof springs 17 interposed at six locations at radially predetermined positions, and the vibrationproof springs 17 are used for vibration of the vibration plate 16. It is for preventing transmission to the engine 2. In order to hold the vibration-proof spring 17 in place, the vibration-proof spring departure preventing member is disposed at a position corresponding to the vibration-proof spring 17 on the bottom surface of the vibration plate 16 and the upper surface of the container upper plate 3, respectively. 40 is integrally formed.

In the through hole 19 formed in the center of the vibrating plate 16, a bolt 18, which fastens one end of the rod-mounted rod member 24, is inserted through the sleeve 20. The winged rod member 24 has an outer diameter smaller than that of the heat transfer tube 1 so that the fluid in the upper chamber 5 flows into the heat transfer tube 1. As shown in FIG. 1, the winged rod member 24 is a member having longitudinal wings attached to an outer circumferential surface of the elongated rod, and is embedded over the entire length of the heat transfer tube 1, and a lower end thereof is the heat transfer. It protrudes from the tube 1 and extends near the top of the lower chamber 6. Here, the wings extending in the longitudinal direction of the rod on the outer peripheral surface of the rod is inclined at a predetermined acute angle with respect to the central axis of the rod.

In the lower chamber 6, a tapered portion 6a inclined from right to left is formed in FIG. 1, and the tapered portion 6a is formed in the heat transfer pipe 1 to facilitate the discharge of ice. To discharge out of the conduit 12.

The present invention by the configuration as described above, the blade rod member is driven by the vibration generated by the vibration motor to vibrate the fluid flowing down the heat transfer tube, driving the vibration movement or shaking movement while consuming less power, heat transfer The efficiency could be improved.

Claims (3)

Having at least one heat transfer tube that exchanges heat radially through the tube wall of the heat transfer tube between the hot fluid and the low temperature fluid, one of the hot and cold fluids is a process fluid flowing down the heat transfer tube In the heat exchanger formed by disposing a vibrating unit in the heat transfer tube, The vibrating portion is a longitudinal wing rod member 24 which is disposed in the heat transfer tube 1 over the entire length and protrudes out of the lower end of the heat transfer tube 1, and the wing rod member 24 is the heat transfer tube 1. Connected to the vibrating means to actively move around and up and down the inner surface of The vibration means is mounted on the motor base 14 to transmit a vibration motor 13 for generating a vibration source and the vibration source of the vibration motor 13 to the rod-mounted rod member 24, the vibration source Mechanical connection means for converting the output of the blades into vibratory movements of the vane rod members 24 along and up and down the inner surface of the heat transfer tube, whereby the vane rod members are vibrated. A device for increasing heat transfer efficiency in a heat exchanger, characterized in that it physically interacts with process fluid (II) to control the accumulation of solids from the process fluid to the inner surface of the heat transfer tube (1). 2. The vibrating plate (16) and the vane according to claim 1, wherein the mechanical connecting means is provided with a vibrating plate (16) and a sleeve (20) provided in a direction orthogonal to the vane rod member (24). A bolt 18 for vibratingly fastening the attachment rod member 24, and the vibration plate 16 is mechanically mounted to the motor base 14 to transmit vibrations of the motor base 14 to the vibration plate 16. Vibration transmission bar 15 for connecting in an operating relationship, and the container of the vibrating plate 16 and the container tube 2 to prevent the vibration of the vibration plate 16 from being transmitted to the container tube 2. Apparatus for increasing the heat transfer efficiency in the heat exchanger, characterized in that it comprises an anti-vibration spring (17) interposed between the upper plate (3). According to claim 1, wherein the blade attachment rod member 24 is disposed in the longitudinal wings attached to the outer circumferential surface of the upper and lower with a small gap on the outer circumference of each other, the longitudinal wings attached to the outer circumferential surface of the central portion The wings are disposed with a distance greater than the distance between the wings attached to the upper and lower, wherein the wings extending in the longitudinal direction of the rod on the outer peripheral surface of the rod is inclined at a predetermined acute angle with respect to the central axis of the rod A device for increasing heat transfer efficiency in a heat exchanger.