KR20110121078A - Heat pipe assembly of heat exchanger for waste heat recovery - Google Patents

Heat pipe assembly of heat exchanger for waste heat recovery Download PDF

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Publication number
KR20110121078A
KR20110121078A KR1020100040510A KR20100040510A KR20110121078A KR 20110121078 A KR20110121078 A KR 20110121078A KR 1020100040510 A KR1020100040510 A KR 1020100040510A KR 20100040510 A KR20100040510 A KR 20100040510A KR 20110121078 A KR20110121078 A KR 20110121078A
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KR
South Korea
Prior art keywords
heat
heat pipe
fin
fins
pipe assembly
Prior art date
Application number
KR1020100040510A
Other languages
Korean (ko)
Inventor
김상식
정원복
Original Assignee
(주) 대홍기업
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Filing date
Publication date
Application filed by (주) 대홍기업 filed Critical (주) 대홍기업
Priority to KR1020100040510A priority Critical patent/KR20110121078A/en
Publication of KR20110121078A publication Critical patent/KR20110121078A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PURPOSE: A heat pipe assembly of a heat exchanger is provided to increase the heat transfer efficiency by slopingly locating a plurality of suction heat fins to the surface. CONSTITUTION: A heat pipe assembly of a heat exchanger comprises a heat pipe(3) and a plurality of suction heat fins(50). The heat pipe has the working fluid inside a sealed container. The suction heat fin is installed to the evaporator of the heat pipe. The suction heat fin is sloped downward to face the surface. The suction heat fin comprises a rim portion and a tilting fin. The rim portion is inserted in the outer circumference of the sealed container. The tilting fin which is a corn-type is extended to slope from the rim portoin to the surface.

Description

Heat pipe assembly of heat exchanger for waste heat recovery

The present invention relates to a heat pipe assembly of a heat exchanger for waste heat recovery, which is used for air conditioning ventilating heat recovery, combustion exhaust gas waste heat recovery, industrial furnace waste heat recovery, drying furnace waste heat recovery, and the like. An endothermic fin relates to a heat pipe assembly of a heat exchanger for recovering waste heat mounted on an evaporation portion of a heat pipe.

Heat pipe is a heat transfer mechanism that transfers heat by using latent heat. It is a device that transfers heat between both ends of a sealed container through the phase change process between gas and liquid. And a very large heat transfer performance compared to a heat transfer device using a single phase working fluid.

Such heat pipes are largely applied to products of heat pipe type coolers and heat pipe type heat exchangers.

The heat pipe type cooler is a device that transfers a large amount of heat generated from a semiconductor device or a communication device to the condenser through the evaporator of the heat pipe, and then cools by natural convection or forced convection using a cooling fin installed in the condenser.

Such a convection type cooler prepares a plurality of single plates having a plurality of cooling fins having a plurality of holes, and sequentially forms a plurality of heat pipes, which are stacked in a layer around the condensation unit. Since it is an exposing type that emits and not a sealed type such as a heat exchanger, it does not primarily focus on pressure drop or flow rate formation, which are important factors in the fins of the heat exchanger.

On the other hand, the heat pipe type heat exchanger is mainly used for heat exchanger for waste heat recovery such as heat recovery for ventilation, waste heat recovery for combustion exhaust gas, waste heat recovery for industrial furnace, waste heat recovery for drying furnace.

As shown in FIG. 6, a heat pipe assembly 1 composed of a heat pipe 3, a heat absorbing fin 5, and a heat dissipation fin 7 is adopted as a heat exchanger for waste heat recovery. Of course, a bracket 9 fastened to the partition plate of the heat exchanger is mounted between the heat absorbing fins 5 and the heat dissipating fins 7.

The heat pipe 3 is composed of a pipe-shaped hermetic container 3a and a working fluid 3b contained in the hermetic container 3a.

The side with the working fluid 3b is the evaporator, and the opposite side is the condenser, and the vapor moving part constitutes a vapor moving part.

Therefore, the heat absorbing fins 5 absorbing the waste heat are mounted on the evaporation unit, and the heat dissipation fins 7 dissipating heat to the atmosphere are mounted on the condensation unit to perform heat exchange.

That is, in one heat pipe 3, a plurality of heat absorbing fins 5 formed of a rim portion 5a and a right angle pin 5b are stacked on the evaporation side, and similarly, a rim portion 7a and a right angle fin 7b are formed. Many heat dissipation fins 7 are stacked on the condensation unit side.

Since the heat absorbing fins 5 and the heat dissipation fins 7 are stacked and stacked, the fins between the heat pipe assembly 1 and the heat pipe assembly 1 form a structure spaced apart from each other by d, so that the pressure drop or flow rate in the heat exchanger is reduced. Contribute to formation (see FIG. 2).

More specifically, the heat sink fins 5 are arranged at right angles 90 degrees with respect to the longitudinal direction of the heat pipe 3.

By the way, waste heat contains fine vaporous organic substances, composites and contaminated substances.

When the vapor phase material in the waste heat collides with the heat absorbing fins 5 of the heat pipe 3, the temperature is lowered, which results in a sticky slurry in the vapor phase.

Such a slurry stays due to the surface tension at right angles of the heat pipe 3 and the heat absorbing fin 5, and the amount of slurry increases over time.

For this reason, when used for a long time, the heat absorbing fins 5 and the heat absorbing fins 5 are blocked, and a thin film is formed on the surface of the heat absorbing fins 5 and the entire surface of the heat pipes 3 to hinder heat transfer, thereby reducing waste heat recovery efficiency. Drop.

In addition, the longer the residence time of the slurry, the shorter the cleaning cycle, thereby increasing the cost and reducing the productivity.

On the other hand, when the airtight container of the heat pipe is aluminum or copper, the heat absorbing fin and the heat dissipation fin are inserted into the airtight container, and then expanded and fixed.

However, since the expansion work is a mechanical work, if a structural defect such as a fin between the fin and the airtight container is generated due to external shock or thermal expansion and contraction due to the flowing wind, the heat resistance is large due to the gap, so that the heat transfer is very poor.

The present invention has been made to solve the above problems, the slurry accumulated between the heat absorbing fin and the heat pipe naturally flows down to secure the area of the heat transfer fin to increase the efficiency of the waste heat recovery, the cleaning cycle is long, productivity improvement and cost It is an object of the present invention to provide a heat pipe assembly of a heat exchanger for waste heat recovery, which helps to reduce the cost.

In order to achieve the above object, the heat pipe assembly of the heat exchanger for waste heat recovery according to claim 1 of the present invention,

A heat pipe having a working fluid inside the sealed container; It includes a plurality of heat absorbing fins mounted on the evaporation side of the heat pipe,

Each of the endothermic fins is inclined downward toward the ground.

Heat pipe assembly of the heat exchanger for waste heat recovery according to claim 2 of the present invention,

A heat pipe having a working fluid inside the sealed container; A plurality of heat dissipation fins mounted on the condensation side of the heat pipe; It includes a plurality of heat absorbing fins mounted on the evaporation side of the heat pipe,

Each of the endothermic fins is inclined downward toward the ground.

By the configuration of claim 1, 2, the slurry accumulated on the heat absorbing fins flows without being accumulated between the fins under the influence of gravity, thereby improving the heat transfer effect and increasing the cleaning cycle, thereby improving productivity and reducing costs.

Heat pipe assembly of the heat exchanger for waste heat recovery according to claim 3 of the present invention,

The endothermic fin is preferably composed of a rim portion fitted to the outer circumferential surface of the hermetic container, and a cone-shaped inclined pin extending inclined toward the ground from the rim portion.

According to the structure of Claim 3, the shape of the inclined pin of a rim part and a cone form can obtain an inclination angle easily by a press.

Heat pipe assembly of the heat exchanger for waste heat recovery according to claim 4 of the present invention,

Preferably, the sealed container and the heat absorbing fin are made of aluminum, and the rim portion is attached to the sealed container by aluminum brazing.

Heat pipe assembly of the heat exchanger for waste heat recovery according to claim 5 of the present invention,

Preferably, the sealed container and the heat absorbing pin are made of copper, and the rim portion is attached to the sealed container by silver solder brazing.

According to the configuration of claim 4, 5, because it is attached by brazing, which is a kind of low melting welding, even if there is thermal expansion, heat shrinkage or external impact, there is no gap (gap) between the heat absorbing fin and the sealed container to prevent poor heat transfer phenomenon.

As is apparent from the above description, the present embodiment has the following effects.

Since each of the plurality of endothermic fins mounted on the evaporation side of the heat pipe having the working fluid inside the hermetically sealed container is inclined toward the ground, the slurry accumulated on the endothermic fins flows down without being accumulated between the fins under the influence of gravity, and thus the heat transfer effect. Increase the cleaning cycle and increase the cleaning cycle, which helps to improve productivity and reduce costs.

In addition, the endothermic fin is composed of the rim portion and the inclined pin of the cone shape, the inclination angle can be easily obtained by the press.

In addition, since the sealing vessel and the heat absorbing pin are attached by brazing, which is a kind of low melting welding, the gap between the heat absorbing pin and the sealed container does not occur even if there is thermal expansion, heat shrinkage, or external impact, thereby preventing poor heat transfer.

1 is a cross-sectional view showing a heat pipe type heat exchanger for waste heat recovery according to a preferred embodiment of the present invention.
2A and 2B are plan views of FIG. 1 arranged in a horizontal and zigzag form.
3 is an enlarged cross-sectional view of the heat pipe assembly of FIG.
4 is a cross-sectional view for explaining a silver solder brazing.
5 is a cross-sectional view for explaining aluminum brazing.
6 is a cross-sectional view showing a heat pipe assembly of a heat exchanger for recovering waste heat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, where like reference numerals refer to like parts, and detailed description thereof will be omitted.

1 is a cross-sectional view showing a heat pipe type heat exchanger for waste heat recovery according to a preferred embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged cross-sectional view of the heat pipe assembly of FIG. 1.

As shown in Fig. 1, Fig. 2A and Fig. 2B, the heat pipe type heat exchanger for recovering waste heat according to the present embodiment has a first duct I through which waste heat passes by a partition plate and a second duct through which cold air passes. The plurality of heat pipe assemblies 10 are assembled between the plurality of heat pipes.

As shown in FIG. 3, the heat pipe assembly 10 according to the present embodiment has a heat pipe 3, a heat absorbing fin 50, and a heat dissipation fin 70 made of a sealed container 3a and a working fluid 3b as in the related art. At least the heat absorbing fins 50 are preferably inclined at an inclination angle α toward the ground.

The inclination angle α is lowered by gravity even if the slurry accumulates between the heat absorbing fins 50 and the heat absorbing fins 50, thereby maintaining an endothermic area for a long period of time, thereby increasing cleaning cycles and thus improving productivity and reducing costs. Becomes

The heat absorbing fin 50 is composed of a cylindrical rim portion 50a having a short height and an inclined fin 50b inclined downward from the rim portion 50a.

The rim portion 50a is fixed to the outer circumferential surface of the airtight container 3a, receives the heat of the inclined pin 50b, transfers it to the working fluid 3b, and also inclines the fins 50b when stacking the heat absorbing fins 50b. ) And also serves as a spacer for maintaining a constant gap between the inclined pin (50b).

The inclined pin 50 preferably has a cone shape that is easy to press.

The heat dissipation fin 70 may be embodied as a right angle fin or an inclined fin, but is preferably implemented as an inclined fin 70b when there is a pollutant in the air.

On the other hand, the heat absorbing fin 50 and the heat dissipation fin 70 can be expanded and mechanically coupled as in the prior art, but in the present embodiment, when metallurgical bonding is performed by silver solder brazing or aluminum brazing, a gap due to external impact or thermal expansion and thermal contraction is obtained. It does not produce stable heat transfer.

4 is a cross-sectional view for explaining a silver solder brazing. The silver solder brazing inserts the ring-shaped silver solder 80 at the boundary between the rim portions 50a, 70a and the pins 50b, 70b, and when placed in the brazing furnace, the silver solder melts and the sealed container 3a and the rim portions 50a, 70a. Penetrate into the capillary phenomenon and attach it.

Such silver solder brazing is preferable when all of the airtight container 3a, the heat absorbing fin 50, and the heat dissipating fin 70 are made of copper having a higher melting point than silver lead.

5 is a cross-sectional view for explaining aluminum brazing. The aluminum brazing is a case in which the heat absorbing fin 50 or the heat radiating fin 70 is coated with the aluminum filler 90 in advance.

In this case, the aluminum filler 90 uses an aluminum material having a lower melting point than the heat absorbing fin 50 or the heat radiating fin 70.

In addition, the aluminum filler 90 should be coated on at least the rims 50a and 70a but may also be coated on the fins 50b and 70b in manufacturing.

The aluminum filler 90 is melted in the brazing furnace and welded to the closed container 3a to completely block the occurrence of a gap due to thermal expansion or external impact.

In this embodiment, although both the heat absorbing fins 50 and the heat dissipation fins 70 are shown to be implemented as inclined fins, the heat absorbing fins 50 are inclined fins, and the heat dissipation fins 70 are generally rectangular right-angled fins. It will be apparent to those skilled in the art that heat exchange is possible as implemented by the present invention.

In addition, in the present embodiment, the heat dissipation fins 70 are described as being mounted on the condensation unit, but the heat dissipation fins 70 may be omitted and heat exchange is possible only with the heat absorbing fins 50.

Meanwhile, in FIG. 2A, the heat pipe assembly 10 has a straight shape arranged side by side in the horizontal and vertical directions, but in FIG. 2B, the heat pipe assembly 10 may be arranged in a zigzag shape so that the wind contacts the heat pipe assembly as much as possible.

As described above, although described with reference to a preferred embodiment of the present invention, the present invention can be variously modified or modified without departing from the spirit and scope of the present invention described in the claims Those skilled in the art will appreciate.

The present invention may be any heat exchanger using a heat pipe.

1,10: heat pipe assembly 3: heat pipe
3a: sealed container 3b: working fluid
5,50: Heat absorbing fin 7,70: Heat sink fin
5a, 7a; 50a, 70a: Rim 5b, 7b: Right angle pin
50b, 70b: Inclined Pin 9: Bracket
80: silver lead 90: aluminum filler

Claims (5)

A heat pipe having a working fluid inside the sealed container;
It includes a plurality of heat absorbing fins mounted on the evaporation side of the heat pipe,
Each of the heat absorbing fins is inclined downward toward the ground heat pipe assembly of the heat exchanger for heat recovery.
A heat pipe having a working fluid inside the sealed container;
A plurality of heat dissipation fins mounted on the condensation side of the heat pipe;
It includes a plurality of heat absorbing fins mounted on the evaporation side of the heat pipe,
Each of the heat absorbing fins is inclined downward toward the ground heat pipe assembly of the heat exchanger for heat recovery.
The method according to claim 1 or 2,
The heat absorbing fin is a heat pipe assembly of a heat exchanger for waste heat recovery consisting of a rim portion which is fitted to the outer peripheral surface of the hermetic container and the inclined fin of the cone shape extending inclined toward the ground from the rim portion.
The method of claim 3,
The airtight container and the heat absorbing fin are made of aluminum,
The rim portion of the heat pipe assembly of the heat exchanger for waste heat recovery attached to the sealed container by aluminum brazing.
The method of claim 3,
The airtight container and the heat absorbing fin are made of copper,
The rim portion is a heat pipe assembly of the heat exchanger for waste heat recovery attached to the sealed container by the brazing of silver.

KR1020100040510A 2010-04-30 2010-04-30 Heat pipe assembly of heat exchanger for waste heat recovery KR20110121078A (en)

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Application Number Priority Date Filing Date Title
KR1020100040510A KR20110121078A (en) 2010-04-30 2010-04-30 Heat pipe assembly of heat exchanger for waste heat recovery

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Application Number Priority Date Filing Date Title
KR1020100040510A KR20110121078A (en) 2010-04-30 2010-04-30 Heat pipe assembly of heat exchanger for waste heat recovery

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KR20110121078A true KR20110121078A (en) 2011-11-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101521721B1 (en) * 2013-11-18 2015-05-19 박재홍 Oil vapor recovery apparatus
KR101535491B1 (en) * 2013-10-31 2015-07-09 주식회사 예진 the tumbler drier with iterative structure for waste heat
KR20190001441A (en) * 2017-06-27 2019-01-04 주식회사 가이아 Drying apparatus of garbage for bad smell prevention and closed circuit type with thermal transfer oil boiler using gas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101535491B1 (en) * 2013-10-31 2015-07-09 주식회사 예진 the tumbler drier with iterative structure for waste heat
KR101521721B1 (en) * 2013-11-18 2015-05-19 박재홍 Oil vapor recovery apparatus
WO2015072615A1 (en) * 2013-11-18 2015-05-21 박재홍 Cold-insulation vessel having cooling fin, and volatile organic compound recovery apparatus including same
KR20190001441A (en) * 2017-06-27 2019-01-04 주식회사 가이아 Drying apparatus of garbage for bad smell prevention and closed circuit type with thermal transfer oil boiler using gas

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