KR102573702B1 - Hybrid heating pipes - Google Patents

Abstract

The present invention relates to a hybrid heating pipe, and more particularly, to a hybrid heating pipe having excellent heat transfer efficiency, stable durability, and even thermal conductivity, a relatively simple structure, easy manufacturing, and an advantageous economical aspect, and a manufacturing method thereof.

Description

Hybrid heating pipes {Hybrid heating pipes}

The present invention relates to a hybrid heating pipe, and more particularly, to a hybrid heating pipe having excellent heat transfer efficiency, stable durability, and even thermal conductivity, a relatively simple structure, easy manufacturing, and an advantageous economical aspect, and a manufacturing method thereof.

The metal tube or metal plate is used for various purposes industrially, and in particular, the metal tube or metal plate can be used as a heat transfer tube or a heat transfer plate. A heat-pipe is a pipe for efficiently transferring heat. Copper, stainless steel, ceramics, tungsten, etc. are used for the main body, and porous fibers, etc. can be used for the quay wall. Methanol, acetone, water, mercury, etc. may be used as the volatile material of

Such heat transfer tubes are used for waste heat recovery devices, air conditioning and refrigeration systems, cooling of electronic components and devices, solar collectors, cooling of electric motors, local heating and heat control, ice making and snow removal, cooling systems of nuclear reactors, and heat control of satellites and aircraft. Through this example, the heat transfer pipe can effectively transfer high-density heat while reducing driving power and greatly reducing the weight and volume of the device.

On the other hand, in recent years, domestic demand for heat pipes has been further increased in relation to energy saving, development and utilization of alternative energy, and cooling and miniaturization of electronic products and electric devices. Accordingly, there is a need for a method of manufacturing a heat transfer pipe having excellent heat transfer efficiency and high reliability at a lower cost. However, the use of the heat transfer pipe, that is, the heating pipe, reported so far is limited due to the following problems.

First, conventional general heating pipes can be widely applied including heating elements such as metal materials or polymer materials commonly used in heat supply systems, but heat transfer efficiency is low, which is generated during the transfer process of heat generated by heat generating devices. Efficient transfer is difficult due to heat loss, etc., problems of even heat distribution throughout the pipe, stability problems due to deterioration in durability against external shocks, and difficulties in research and development that combine heat transfer efficiency, material technology, and design engineering No research has been reported that simultaneously satisfies heat transfer efficiency and reliability due to excellent stability.

Second, in order to overcome the above-mentioned conventional problems, research on heating pipes to improve heat transfer efficiency and reliability by coating the surface of metal members such as pipes with other metal materials or polymer materials has been introduced, but in this case also Other materials coated on the surface rather act as foreign substances during the external operation of the heating pipe and hinder heat transfer, making it difficult to achieve the desired heat transfer efficiency or limiting applications due to increase in volume, weight, etc., and inside the pipe The problem of even heat dissipation has not been solved, and furthermore, disadvantageous problems in terms of economic efficiency have been reported due to additional processes and cost problems caused by coating with other metal materials or polymer materials.

Third, a study using carbon fiber or graphene has recently been reported as part of a study on coating the pipe with another metal or polymer material. As a method of coating carbon fibers or graphene on the surface of a pipe, a common processing step is to spirally wind strip-shaped carbon fibers after knitting the carbon fibers, but according to the above processing process, the hardness of the carbon fibers themselves is reduced. There is a problem that the formability is low and the specific surface area is not high, and the limitation in terms of heat generation efficiency due to the limitation of the specific surface area improvement according to the fiber diameter and the limitation of the network structure formation, and the deterioration of the heat generation function due to the fracture of the carbon fiber. There is no way to solve the phosphorus problem, so this also has not reached commercialization.

Accordingly, the present applicant recognizes the need for a method for manufacturing a heating pipe with excellent heat transfer efficiency and high reliability in a relatively simple process and at low cost, and weaves carbon nanotubes (CNT) on the surface with a hybrid braiding method to produce a heating pipe The invention of a heating pipe capable of remarkably improving even heat dissipation and heat transfer efficiency was completed by manufacturing high reliability such as high temperature holding power and stability to the outside, and introducing a heat medium into the pipe.

It was devised based on the above technical background, and the problem to be solved by the present invention is that unlike conventional heating pipes, there is no risk of fire and electromagnetic wave generation due to not using a heating wire, and manufacturing is possible with a relatively simple process. It is possible to provide a heating pipe that has a great advantage in terms of economy and can significantly improve durability against external impact.

In addition, another problem to be solved by the present invention is to provide a heating pipe that does not generate noise like a conventional hot water boiler and can transfer heat evenly with high efficiency without freezing even at sub-zero external temperatures by introducing a heating medium into the pipe. .

In addition, another problem to be solved by the present invention is to induce heat while minimizing heat loss transferred from a heat generating source using latent heat or heat storage material at the same time as the above object, thereby securing economic feasibility according to conventional heat loss and thus various industrial groups It is to provide a heating pipe that can greatly improve the utilization of

In order to achieve the above object, the present invention provides a hybrid heating pipe including a high modulus metal pipe and carbon fibers braided on an outer surface of the high modulus metal pipe.

In addition, according to an embodiment of the present invention, the high elasticity metal pipe may further include a heat medium therein.

In addition, the carbon fiber braided on the surface of the highly elastic metal pipe may be characterized in that it is a carbon nanotube (CNT).

In addition, the carbon fibers braided on the surface of the high modulus metal pipe may be lattice-woven.

In addition, the specific surface area of the high modulus metal pipe may be improved by 1.5 to 4 times compared to before being braided with carbon fiber.

In addition, the heat medium may be characterized in that heat transfer efficiency is improved by using latent heat to prevent heat loss of the highly elastic metal pipe.

In addition, the heating medium may be characterized in that it includes at least one selected from the group consisting of tetradecane, nonadecane, hexadecane, and octadecane as a latent material.

In addition, the heat medium may be characterized in that the latent material is mixed with 0.1 to 10% by weight.

In addition, the present invention provides a method for manufacturing a hybrid heating pipe comprising the step of braiding carbon fibers on the surface of a highly elastic metal pipe.

In addition, according to an embodiment of the present invention, it may be characterized in that it further comprises the step of including a heating medium inside the high-elasticity metal pipe.

In addition, it may be characterized in that the step of introducing the heat medium into the high elasticity metal pipe in the form of a capsule.

In addition, the manufacturing method of the hybrid heating pipe may include a first step of preparing a heat medium composition and a second step of applying the heat medium composition to the inside of the high modulus metal pipe.

In addition, the present invention provides a heating and heating system including the above-described hybrid heating pipe, electric wire and paste for current, and laminating for safety.

Unlike conventional heating pipes, the present invention has no risk of fire or electromagnetic waves due to not using a heating wire, and it can be manufactured with a relatively simple process, so it has a great advantage in terms of economy, and furthermore, it has durability against external shocks. can be significantly improved. In addition, it does not generate noise like a conventional hot water boiler, and by introducing the heat medium composition into the pipe, it is possible to transfer heat quickly and evenly with high efficiency without freezing even at sub-zero external temperatures. Since heat can be induced while minimizing heat loss, it is possible to greatly improve utilization in various industrial groups by securing economic feasibility according to conventional heat loss.

1 shows a hybrid heating pipe according to an embodiment of the present invention.

This invention may be embodied in many different forms and is not limited to the embodiments set forth herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

As described above, since conventional heating pipes do not satisfy the heat transfer efficiency required by various industries, research on this is urgently needed.

Accordingly, the present invention seeks to solve the above problems by providing a hybrid heating pipe including carbon fibers braided on the surface of the high modulus metal pipe and a heat medium included in the high modulus metal pipe.

Through this, the present invention can manufacture a heating pipe that has excellent heat transfer efficiency, stable durability and even thermal conductivity, and a relatively simple structure, which can greatly contribute to process simplification and economic efficiency.

Hereinafter, the present invention will be described in detail.

hybrid heating pipe

The hybrid heating pipe 10 according to the present invention includes carbon fibers 200 braided on the surface of the highly elastic metal pipe 100 . Since the high-elasticity metal pipe can be used as long as it meets the purpose of the present invention, mechanical/material characteristics such as the inner and outer diameter of the pipe are not particularly limited in the present invention.

Conventionally, heating pipes widely used for domestic hot water, industrial hot water, hot spring water, and centralized heating or centralized heating and cooling pipes have low thermal conductivity and cannot effectively respond to heat loss in the inner pipe. To compensate for this, polymers coated on the inside and outside of the heating pipe Materials, etc. have lower thermal conductivity than metal tube materials, so apart from the effect of improving durability and specific surface area, they are still disadvantageous in terms of heat loss. This decrease in reliability not only cannot satisfy the demand for heat supply in sub-zero external temperatures required by various industrial groups, but also limits the ability to use it as a concentrated cooling and heating pipe.

That is, as a conventional method of coating carbon fibers or graphene on the surface of a pipe, a processing process of winding strip-shaped carbon fibers in a spiral after completing knitting of the carbon fibers is common, but according to the processing process, the carbon fiber itself There is a problem that the hardness is not high and the moldability is low, and a part of the carbon fiber comes into contact with the inner wall of the pipe without undergoing any hardening treatment, and the carbon fiber that contacts the inner wall of the pipe after a long time of use causes damage to the inner wall of the pipe. As a result, the service life of the heating pipe may be reduced. Furthermore, there is no way to solve chronic problems such as the limitation of improving the specific surface area according to the fiber diameter, the limitation in terms of heating efficiency due to the limitation of network structure formation, and the deterioration of the heating function due to the fracture of carbon fiber. It has not reached commercialization.

Accordingly, the present invention solves the above problems by using hybrid braided carbon fibers on the surface of a highly elastic pipe.

At this time, the carbon fiber may be a known carbon fiber that meets the purpose of the present invention, and more preferably, long fibers that meet the purpose of the present invention and consist only of carbon produced by thermal decomposition of organic materials. Carbon fibers in the form of chopped strands, mats, or fabrics may be used, and most preferably, the carbon fibers braided on the surface of the high modulus metal pipe are generated by discharging the carbon material. It may be a carbon nanotube (CNT).

According to a preferred embodiment of the present invention, when the carbon fibers are carbon nanotubes, the carbon nanotubes may be lattice-woven on the surface of a highly elastic pipe by a hybrid braiding method. Such carbon nanotubes can improve the thermal conductivity of the heating pipe itself due to their excellent mechanical properties, and in particular, the specific surface area is remarkably improved by lattice weaving, and the thermal conductivity of the heating pipe is greatly improved due to the maximized thermal conductivity. can improve In addition, not only can uniform heat distribution be induced throughout the pipe, but also durability and stability to the outside can be greatly improved due to the lattice weaving of carbon nanotubes.

That is, due to the carbon fiber braided on the surface of the high modulus metal pipe, the specific surface area of the high modulus metal pipe can be improved by 1.5 to 4 times compared to before braiding with the carbon fiber, and according to a preferred embodiment of the present invention, the carbon fiber When the fibers are carbon nanotubes, such specific surface area improvement is further maximized, and the specific surface area can be improved by 3 to 10 times. At this time, if the specific surface area of the highly elastic metal pipe is improved to less than 1.5 times due to the carbon fibers braided on the surface of the high elasticity metal pipe, there may be a limit in terms of the desired heat generation efficiency, and the durability is weak, resulting in breakage. Decreased fever function may be induced. In addition, if the specific surface area of the highly elastic metal pipe is increased by more than 10 times due to the carbon fibers braided on the surface of the highly elastic metal pipe, it may be rather disadvantageous in terms of even heat conduction due to the excessively large specific surface area.

The method of hybrid braiding the carbon nanotubes is not particularly limited as it can be used without limitation as long as it meets the purpose of the present invention described above because a known conventional hybrid braiding method can be used. However, in the case of weaving in plain weave, it is preferable to weave a grid by a hybrid braiding method because the above-mentioned significant improvement in specific surface area and increase in durability cannot be expected.

On the other hand, conventionally used heating pipes use copper, stainless steel, ceramics, tungsten, etc. as the material of the main body to efficiently transfer heat, and additionally use a heating wire to maintain the heating function even at an external sub-zero temperature. The heat transfer efficiency was improved by using porous fibers or internal volatile substances such as methanol, acetone, water, and mercury.

However, such heating pipes are used in waste heat recovery devices, air conditioning and refrigeration systems, cooling of electronic components and devices, solar collectors, cooling of electric motors, local heating and heat control, ice making and snow removal, cooling systems of nuclear reactors, satellites and aircraft. In order to be used in various industries such as thermal control, there is a limit to greatly reducing the weight and volume of the device while effectively transporting high-density heat according to each use environment and purpose while reducing the driving power. Due to this, there are restrictions on its use due to problems such as fire or electromagnetic wave generation.

To overcome this, the phase change material commonly used is a latent heat material that can absorb or release a lot of heat while changing phase from solid to liquid, liquid to solid, liquid to gas, or gas to liquid at a specific temperature. A heat storage material or a material that functions as a heat regulator. However, if only solid-state mineral powder is included, the far-infrared radiation effect may be excellent, but there may be problems such as deterioration of heat storage function and uneven heat transfer inside the pipe. Also, if only liquid heat storage material is used, heat storage Problems such as interruption of heating operation and accidents may occur in the case of expensive sealing structure to completely seal the liquid, defects and erosion caused by the penetration of the heat storage liquid, and melting of the heating pipe due to freezing and bursting of the heat storage medium and excessive heating. .

Accordingly, the present invention overcomes the above-described problems by including solid and liquid phase change materials as the heat medium 300 introduced into the high modulus metal pipe. That is, the heat medium according to the present invention can improve heat transfer efficiency by preventing heat loss of the highly elastic metal pipe by using latent heat possessed by the heat medium.

At this time, the heat medium according to the present invention is a latent heat material, heat storage material, or material capable of absorbing or releasing a lot of heat while changing phase from solid to liquid, from liquid to solid, from liquid to gas, or from gas to liquid at a specific temperature. It refers to a material that has a thermal control function, and may be a temperature control function material that stores heat around itself and releases it when necessary. During the phase change of the phase change material according to the present invention, the latent heat absorbed or released while maintaining the same temperature or the heat related to the phase change between solid and liquid can play an important role in energy storage, and can play an important role in energy storage. Since it has tens to hundreds of times more energy storage and emission capabilities at the phase change temperature than conventional materials, it can perform significantly better heat and heat functions than energy-saving materials that use sensible heat.

To this end, the present invention may include a decane compound, which is a latent heat material, a carbon nanomaterial having excellent thermal conductivity, and an antifreeze as the heat medium.

The decane compound is a phase change material and performs a key function of heat generation and heating of the heating pipe according to the present invention, and a known conventional decane compound may be used as long as it meets the purpose of the present invention, but preferably tetradecane. , At least one selected from the group consisting of nonadecane, hexadecane, and octadecane may be used.

In addition, the latent material may be mixed in an amount of 0.1 to 10% by weight, more preferably in an amount of 1 to 5% by weight, based on the total weight of the heating medium composition. At this time, if the weight of the latent heat material is less than 0.1% by weight with respect to the total weight of the heating medium composition, there may be a problem in that the desired thermal and exothermic performance cannot be obtained. If this amount exceeds 10% by weight, the heat medium composition is not uniformly formed, which may be disadvantageous in terms of even heat distribution and heat conduction.

The carbon nanomaterial plays a role in uniform heat dissipation and heat conduction improvement of the heating pipe according to the present invention, and a known conventional carbon nanomaterial may be used as long as it meets the purpose of the present invention. For example, porous graphite ( Porous graphite and expanded graphite have a reticular pass structure, high specific surface area, surface activity, and non-polarity, so nano-stable phase change materials can be manufactured.

The antifreeze serves to reduce the heat transfer rate and heat loss of the heating pipe according to the present invention, and a known conventional antifreeze may be used as long as it meets the purpose of the present invention. For example, ethylene glycol, polyvinyl alcohol, It may include any one or more selected from the group consisting of oxalic acid, Borax, and the like.

In this way, unlike the conventional liquid oil and solid thermal storage materials, the present invention uses a liquid and solid mixed heat medium by introducing it into the heating pipe, so the heat and heat function and thermal conductivity are very high, and the heat medium is inserted. As a result, the temperature transfer inside the pipe is evenly distributed, which greatly improves economic efficiency and heat transfer efficiency.

On the other hand, the material included in such a heating medium is only an example of the present invention, and may further include a known conventional material such as suppressing deterioration of the heating medium and inhibiting bacterial propagation by further including an environmentally friendly preservative. can be, so it is not particularly limited.

For example, as a method of including the heat medium in the heating pipe according to the present invention, the heat medium composition can be injected or coated inside the pipe as in the manufacturing method of the heating pipe to be described later, and a method of introducing it using a protective cap The decane compound is used as a capsule core, and the carbon nanomaterial, antifreeze and other monomer mixtures are prepared as a capsule shell, and then introduced into the heating pipe in the form of a capsule. In this case, the capsule type is prepared by including other monomer mixtures, so it has a relatively high heat resistance temperature and mechanical strength, and has a large specific surface area, so it can be advantageous in terms of storing and releasing heat.

In this case, the monomer mixture may include a methyl methacrylate monomer, an epoxy acrylate monomer, and a multifunctional acrylate monomer. That is, spherical particles having excellent durability and a smooth surface can be produced by preparing the heat medium polymer including a methyl methacrylate monomer, an epoxy acrylate monomer, and a multifunctional acrylate monomer. Accordingly, it is possible to maximize the internal content of the heat medium in the heating pipe, so that latent heat characteristics can be further improved.

The epoxy acrylate-based monomer may be any one or two or more selected from bisphenol A epoxy acrylate, bisphenol F epoxy acrylate, novolak-epoxy acrylate, cresol-novolac epoxy acrylate, and biphenol epoxy acrylate. As the epoxy acrylate-based monomer is mixed with the methyl methacrylate monomer and the multifunctional acrylate-based monomer, spherical microcapsules having a smooth surface of the shell can be formed, which is preferable.

The multifunctional acrylate-based monomer may be an acrylate-based monomer having two or more functional groups. Preferably, the functional group may be a double bond that is an unsaturated bond. The multifunctional acrylate-based monomers include, for example, trimethylolpropane triacrylate, trimethylolpropane diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, pentaerythritol pentaacrylate, dipenta It may be any one or a mixture of two or more selected from erythritol pentaacrylate, dipentaerythritol hexaacrylate, glycerol diacrylate, and ethylene diacrylate.

At this time, the monomer mixture may consist of 75 to 85% by weight of a methyl methacrylate monomer, 1 to 10% by weight of an epoxy acrylate-based monomer, and 10 to 20% by weight of a multifunctional acrylate-based monomer.

According to the present invention, unlike conventional heating pipes, there is no risk of fire and electromagnetic waves due to not using a heating wire, and it can be manufactured with a relatively simple process, which has a great advantage in terms of economy, and furthermore, external impact durability can be significantly improved. In addition, it does not generate noise like a conventional hot water boiler, and by introducing the heat medium composition into the pipe, it is possible to transfer heat quickly and evenly with high efficiency without freezing even at sub-zero external temperatures. Since heat can be induced while minimizing heat loss, it is possible to greatly improve utilization in various industrial groups by securing economic feasibility according to conventional heat loss.

Accordingly, the present invention can also provide a heating and heating system including the hybrid heating pipe, an electric wire and paste for current, and laminating for safety.

Manufacturing method of hybrid heating pipe

Next, a method for manufacturing a hybrid heating pipe according to the present invention will be described. However, in order to avoid duplication, descriptions of parts having the same technical concept as the hybrid heating pipe described above are omitted.

A method of manufacturing a hybrid heating pipe according to the present invention includes performing hybrid braiding of carbon fibers on the surface of a highly elastic metal pipe and including a heating medium inside the highly elastic metal pipe.

Known carbon fibers suitable for the purpose of the present invention may be used as the carbon fiber braided on the surface of the high modulus metal pipe, more preferably suitable for the purpose of the present invention, and made only of carbon produced by thermal decomposition of organic materials. Carbon fibers in the form of long fibers, chopped strands, mats, or fabrics may be used, and most preferably, the carbon fibers braided on the surface of the high modulus metal pipe are carbon fibers. It may be a carbon nanotube (CNT) generated by discharging the material.

According to a preferred embodiment of the present invention, when the carbon fibers are carbon nanotubes, the carbon nanotubes may be lattice-woven on the surface of a highly elastic pipe by a hybrid braiding method. Such carbon nanotubes can improve the thermal conductivity of the heating pipe itself due to their excellent mechanical properties, and in particular, the specific surface area is remarkably improved by lattice weaving, and the thermal conductivity of the heating pipe is greatly improved due to the maximized thermal conductivity. can improve In addition, not only can uniform heat distribution be induced throughout the pipe, but also durability and stability to the outside can be greatly improved due to the lattice weaving of carbon nanotubes.

At this time, since a known conventional hybrid braiding method can be used for the hybrid braiding method of the carbon nanotubes, it can be used without limitation as long as it meets the purpose of the present invention described above, and is not particularly limited. That is, as a hybrid braiding method that can be used in the present invention, a method for manufacturing a hybrid fiber as a technology applicable to high-performance polymer composite materials can be mainly applied. For example, a three-axis braid ( Using a triaxial braid weaving machine, the carbon nanotubes or known conventional reinforcing fibers are used as longitudinal fibers and the carbon nanotubes are used as braiding fibers, and fibers in at least three directions can be woven by crossing each other. there is. However, in the case of weaving with plain weave, the above-mentioned significant improvement in specific surface area and increase in durability cannot be expected, so the hybrid braiding method is used to weave the grid so that the specific surface area is improved by 1.5 to 4 times compared to before braiding with carbon fiber. It is desirable to ding.

Next, the step of including the heat medium in the high modulus metal pipe may be a step of including the heat medium in the high modulus metal pipe or a step of introducing the heat medium into the high modulus metal pipe in the form of a capsule. According to an example, the step of including the heat medium in the high modulus metal pipe may include a first step of preparing a heat medium composition and a second step of applying the heat medium composition to the inside of the high modulus metal pipe.

More specifically, in the first step, a thermal storage material is added to form a dispersed phase, the dispersed phase is added to a continuous phase containing a polymeric surfactant and dispersed to form an emulsion, and the emulsion is subjected to suspension polymerization. and drying the suspension polymer to prepare a capsule.

At this time, the dispersion temperature may be carried out at 10 to 60 ° C. to uniformly melt or disperse, but is not limited thereto. In addition, inorganic peroxides such as sodium persulfate, potassium persulfate, ammonium persulfate, potassium persulfate, and hydrogen peroxide as dispersion initiators; t-butyl hydroperoxide, cumene hydroperoxide, p-mentane hydroperoxide, di-t-butyl peroxide, t-butylcumyl peroxide, acetyl peroxide, isobutyl peroxide, octanoyl peroxide, dibenzoyl organic peroxides such as peroxide, 3,5,5-trimethylhexanol peroxide, t-butyl peroxyisobutyrate, and diisopropylbenzene hydroperoxide; It may be any one or two or more selected from nitrogen compounds such as azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexane carbonitrile, and methyl azobisisobutyrate (butyrate). It is not limited thereto.

In addition, any one or a mixture of two or more selected from polyvinyl alcohol and polyvinylpyrrolidone may be included as the polymeric surfactant. At this time, the polymeric surfactant may be a surfactant solution of 0.05 to 20% by weight, preferably 1 to 10% by weight.

The suspension polymerization reaction temperature may be 40 to 80 °C, and the polymerization reaction time may be 1 to 12 hours, but is not limited thereto. In the above range, it is preferable to prepare uniform capsules by preventing unstable system formation due to rapid polymerization during suspension polymerization.

The suspension polymer is not limited to being dried by a conventional drying method, and spray drying is preferable because it has excellent solubility and fluidity compared to other drying methods, so that spherical capsules with a smooth surface can be prepared.

Although the present invention will be described in more detail through the following examples, the following examples are not intended to limit the scope of the present invention, which should be interpreted to aid understanding of the present invention.

Example 1

0.36 g of initiator Vazo52G (Dupont) was added to 19 g of methyl methacrylate (LG-MMA), 3.6 g of trimethylolpropane triacrylate (TMPTA, KPX), and 1.2 g of epoxy acrylate (Miramer PE210, Miwon Specialty Chemical). After that, it was completely dissolved. In the dissolved mixture, n-octadecane (RT28HC, RUBITHERM) was included as a latent heat material in an amount by weight as shown in Table 1 below, and then added to 2.8 g of octadecanol (stearyl alcohol, Aecochem) to prepare a dispersed phase. Subsequently, 79.64 ml of a 10% by weight aqueous solution of polyvinyl alcohol (PVA217, KURARAY POVAL) maintained at 40 ° C was used as a continuous phase, and the dispersed phase was gradually added over 2 minutes at 2,500 rpm using a homomixer and emulsified for 10 minutes to obtain a stable An emulsion was prepared. Thereafter, the stirring speed was adjusted to 300 rpm, the pH was adjusted to 4 with 1% by weight aqueous phosphoric acid solution, and suspension polymerization was performed at 60° C. for 4 hours to prepare a suspension polymerization product. After cooling the suspension polymer to room temperature, the suspension polymer was dried using a spray dryer (FSD-1.5R) at a feeding rate of 100 ml/min, an atomizer speed of 13,000 rpm, and In let temp. 180℃, Out let temp. Spray drying was performed under the condition of 80° C. to prepare core-shell capsules. Thereafter, the capsule was applied as a powder to a mesh type "heating net" inside a Heatpipe Circle 6120 6mm-120mm copper pipe and sufficiently dried.

Examples 2 to 4

It was prepared in the same manner as in Example 1, but a heat medium was prepared using the materials shown in Table 1 below instead of n-octadecane as a latent heat material.

Examples 5 to 8

It was prepared in the same manner as in Example 1, but a heat medium was prepared by changing the weight % of n-octadecane as shown in Table 1 below.

Thereafter, the latent heat was measured with a differential scanning calorimeter (DSC, TA Co. Q1000) and is shown in Table 1 below.

latent material Latent Heat △H (J/g) note type Heat medium composition
% by weight of the total Example 1 octadecane 4 207.1 Example 2 Hexadecane 4.3 201.5 Example 3 nonadecane 4.8 176.8 Example 4 tetradecane 3.2 198 Example 5 octadecane 0.8 77.5 Example 6 octadecane 1.3 122.3 Example 7 octadecane 7.1 164.5 However, heat is not uniformly distributed Example 8 octadecane 13 _ No capsule formation

Although the present invention has been described through preferred embodiments as described above, the present invention is not limited thereto and various modifications and variations are possible without departing from the concept and scope of the claims described below. Those working in the technical field to which it belongs will readily understand.

10: hybrid heating pipe
100: high modulus metal pipe 200: braided carbon fiber
300: heat medium

Claims (5)

highly elastic metal pipes; and
carbon fibers braided on the outer surface of the high modulus metal pipe; Including,
The high-elasticity metal pipe further includes a heat medium to improve heat transfer efficiency by preventing heat loss of the high-elasticity metal pipe using latent heat,
The heat medium composition is mixed with a latent material in an amount of 1 to 5% by weight,
The latent material is a decane compound,
The heat medium is drawn into the heating pipe in the form of a capsule,
The capsule core of the heating medium is a decane compound,
The capsule shell of the heat medium is a mixture of monomers and carbon nanomaterials,
Hybrid heating pipe.
delete According to claim 1,
The hybrid heating pipe, characterized in that the carbon fiber braided on the outer surface of the highly elastic metal pipe is a carbon nanotube (CNT).
Including hybrid braiding carbon fibers on the surface of the highly elastic metal pipe,
A first step of preparing a heat medium composition; and a second step of applying the heat medium composition to the inside of the highly elastic metal pipe. including,
The heat medium composition is mixed with a latent material in an amount of 1 to 5% by weight,
The latent material is a decane compound,
The heat medium is drawn into the heating pipe in the form of a capsule,
The capsule core of the heating medium is a decane compound,
The capsule shell of the heat medium is a mixture of monomers and carbon nanomaterials,
Manufacturing method of hybrid heating pipe.


delete