Thermal energy reduction device in the electric system

Abstract

An electrical system thermal energy reduction device is provided. The disclosed electrical system thermal energy reduction device, for reducing thermal energy within an electrical system, comprises: an electrode portion arranged to be electrically connected to an electrical line; a housing portion connected to the electrode portion and made of a thermally conductive material; a heat dissipation portion including a plurality of heat dissipation plates arranged at a certain interval and provided on the upper surface of the housing portion; and a thermal energy conduction portion arranged on the lower surface of the housing portion to conduct heat conducted through the electrode portion without short circuit.

Description

Technology Field

[0001] The present invention relates to a thermal energy reduction device within an electrical system capable of releasing thermal energy into the air caused by heat generated from electrical lines, transformers, inverters, motors, generators, power supply units, electrical distribution boards, battery charging devices, PLCs, sensors, etc., constituting the electrical system. More specifically, the invention relates to a thermal energy reduction device for an electrical system capable of directly releasing thermal energy into the air without causing a short circuit by applying a thermal energy conductive part containing a specific compositional metal-based compound to electrical lines and electrical equipment. Background Technology

[0002] Thermal energy refers to the kinetic energy generated by an increase in temperature within an electric line. Heat describes the method of energy transfer, but it is not energy itself. Methods of heat transfer include thermal conduction, thermal convection, and thermal radiation. Thermal energy flows between systems that are not in equilibrium and flows spontaneously from a higher temperature side to a lower temperature side. When two objects with different temperatures come into thermal contact, they exchange internal energy until their temperatures become equal. At this time, the rate of heat transfer is 1 / 10 -12 It is called sec.

[0003] Meanwhile, in the case of industrial plants, when the total load rate is 50%, the internal wire temperature averages between 30°C and 35°C. However, when the load rate reaches 60%, the internal wire temperature increases to between 45°C and 53°C. At this time, the internal wire temperature in the transformer secondary side and within the ACB, where 100% of the load current is concentrated, reaches between 65°C and 80°C. If the current usage is tens of thousands of amperes, the wire temperature inside the electrical room exceeds 80°C, so air conditioning units are operated to prevent the temperature from rising. In the case of rolling mills used for processing steel, wide, large busbars with a width of 100 mm and a thickness of 15 mm are used to prevent thermal runaway when the surface temperature of the busbar exceeds 80°C, and large cooling units and large fans are used to cool them.

[0004] In addition, a superconducting cable using -198°C liquid nitrogen as a refrigerant has been proposed as a technology to reduce thermal energy in the electrical system, but this technology is applicable to ultra-high voltage networks such as 345KV and 765KV. It is not a technology that can be used in industrial plants or for commercial and residential use.

[0005] Consequently, the common method currently used in industrial plants to reduce thermal energy involves lowering the overall internal temperature of the electrical room using air conditioners or large fans. Although the internal temperature of the electrical room, where the load from all machinery in the factory is concentrated, exceeds 80°C, if it is not cooled, the temperature rises above 100°C. If left unchecked, this can cause the breaker switch to automatically trip, halting factory operations, reducing transformer efficiency, and, in severe cases, even leading to a fire. Therefore, the electrical room is unnecessarily equipped with air conditioning facilities that are 4 to 5 times more powerful than the actual heat generated.

[0006] Heat within the electrical room radiates from the busbars; recently, thick, wide busbars are being used to cope with the increased heat generation resulting from rising loads. This is because there are no existing methods or technologies for heat dissipation. Therefore, there is a need for measures to effectively cool the heat generated within the electrical system, including the electrical room and power lines.

[0007] Meanwhile, electrical distribution boxes installed on the walls of industrial plants are connected to numerous mechanical devices, generating heat comparable to that of electrical rooms; yet, they completely lack any heat dissipation devices. Currently, the management of these factory distribution boxes is limited to regularly checking heat output using thermal imaging cameras or monitoring temperature changes by attaching heating tapes.

[0008] Thermal energy is akin to thermal noise in communication networks. Thermal energy has the characteristic of concentrating and accumulating in equipment with relatively low energy density. Consequently, thermal energy acts as the primary cause of failures and malfunctions by accelerating the degradation of components within PLCs (Programmable Logic Controllers) and various sensors. Since harmonics occur only in the alternating current (AC) domain, they are extinguished in the direct current (DC) domain. Therefore, PLCs or sensors operating on DC do not fail due to harmonics, but rather due to thermal energy flowing in from the AC side.

[0009] Therefore, there is a need for technology that can effectively reduce thermal energy, which is the biggest cause of various accidents and power losses within the electrical system. The problem to be solved

[0010] The present embodiment aims to provide an electrical system thermal energy reduction device capable of efficiently reducing the internal temperature and thermal energy of an electrical system without short circuit phenomena.

[0011] The present embodiment aims to provide an electrical system thermal energy reduction device capable of efficiently reducing the magnitude of harmonics.

[0012] The present embodiment aims to provide an electrical system thermal energy reduction device capable of reducing power loss due to heat.

[0013] The present embodiment aims to provide an electrical system thermal energy reduction device capable of reducing the failure rate of electrical equipment.

[0014] This embodiment aims to provide an electrical system thermal energy reduction device that can be used semi-permanently. means of solving the problem

[0015] According to one aspect of the present invention, an electrical system thermal energy reduction device for reducing thermal energy within an electrical system may be provided to include: an electrode portion arranged to be electrically connected to an electrical line; a housing portion made of a thermally conductive material connected to the electrode portion; a heat dissipation portion including a plurality of heat dissipation plates arranged at a certain interval and spaced apart from each other on the upper surface of the housing portion; and a thermal energy conduction portion arranged on the lower surface of the housing portion to conduct heat conducted through the electrode portion without short circuit.

[0016] The above thermal energy conducting part may include a case part having an internal receiving space formed therein, a thermal energy conducting material part comprising a metal-based compound filled in the case part to conduct heat within the electric line, and a cover part for sealing the case part.

[0017] The above metal-based compound may include a first metal oxide comprising aluminum oxide (Al2O3); and one or more second metal oxides selected from the group consisting of iron oxide (Fe2O3), magnesium oxide (MgO), potassium oxide (K2O), and silicon dioxide (SiO2).

[0018] The above metal compound may further include two or more metal oxide impurities selected from the group consisting of sodium oxide (Na2O), barium oxide (BaO), zirconium oxide (ZrO2), and chromium oxide (Cr2O3).

[0019] With respect to 100 parts by weight of the metal-based compound, it may include 30 to 100 parts by weight of the first metal oxide; and 2 to 60 parts by weight of the second metal oxide.

[0020] With respect to 100 parts by weight of the metal-based compound, the metal oxide-based impurity may be included in an amount of 1 to 10 parts by weight.

[0021] The above thermal energy conductive material part may further include a heat dissipation resin.

[0022] It may further include a connecting part provided to thermally connect the electrode part and the thermal energy conductive material part.

[0023] The above electrical system thermal energy reduction device further includes a cooling unit, and the cooling unit may include a fan and / or an air conditioner.

[0024] The above electrical system thermal energy reduction device may have a harmonic magnitude reduction rate of 60% or more for 2nd to 50th order harmonics. Effects of the invention

[0025] The present embodiment provides an electrical system thermal energy reduction device capable of efficiently reducing the internal temperature and thermal energy of an electrical system without short-circuiting.

[0026] This embodiment provides an electrical system thermal energy reduction device capable of efficiently reducing the magnitude of harmonics.

[0027] This embodiment provides an electrical system thermal energy reduction device capable of reducing power loss due to heat.

[0028] This embodiment provides an electrical system thermal energy reduction device capable of reducing the failure rate of electrical equipment.

[0029] This embodiment provides an electrical system heat energy reduction device that can be used semi-permanently. Brief explanation of the drawing

[0030] FIG. 1 is a perspective view showing the upper surface structure of an electrical system thermal energy reduction device according to one embodiment of the present invention. FIG. 2 is a perspective view showing the lower surface structure of an electrical system thermal energy reduction device according to one embodiment of the present invention. FIG. 3 is a manufacturing process diagram of a thermal energy conductive material part of an electrical system thermal energy reduction device according to one embodiment of the present invention. FIG. 4 is a diagram illustrating the technical principle of an electrical system thermal energy reduction device according to one embodiment of the present invention. Figure 5 shows the results of temperature changes resulting from the installation of an electrical system thermal energy reduction device according to one embodiment of the present invention. Figure 6 is a result illustrating the thermal energy cluster characteristics. Figure 7 is the result of measuring the level of heat energy reduction following the installation of an electrical system heat energy reduction device according to one embodiment of the present invention. Specific details for implementing the invention

[0031] The following embodiments are presented to sufficiently convey the concept of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms.

[0032] In this specification, thermal energy refers to the internal kinetic energy of an electric system generated by heat produced by thermal action due to electron movement when voltage and current are applied to an electric line during the operation of a mechanical device, heat produced by harmonic increase, heat produced by a 90-degree phase difference of an inductive load, heat produced by a starting current that rises instantaneously during the operation of a mechanical device, heat produced by three-phase imbalance, and heat introduced into the electric line from mechanical devices such as electric furnaces, heating furnaces, refrigerators, presses, rolling mills, welding machines, air conditioners, etc., and electric devices such as transformers, power supply units, and motors.

[0033] FIG. 1 is a perspective view showing the upper surface structure of an electrical system thermal energy reduction device according to one embodiment of the present invention.

[0034] FIG. 2 is a perspective view showing the lower surface structure of an electrical system thermal energy reduction device according to one embodiment of the present invention.

[0035] Referring to FIGS. 1 and 2, the electrical system thermal energy reduction device (10) according to the present invention is configured to reduce thermal energy within an electrical system and largely comprises an electrode part (100), a housing part (200), a heat dissipation part (300), and a thermal energy conduction part (400).

[0036] The electrode portion (100) is electrically connected to an electric line and is made of a material having electrical conductivity and thermal conductivity. If the electric system is single-phase, it may include two electrode portions (100), and if it is three-phase, it may include three electrode portions (100). Meanwhile, since the thermal energy reduction device (10) is used in parallel connection so as not to change impedance, the installation of the thermal energy reduction device (10) does not have any effect on existing mechanical equipment.

[0037] The housing portion (200) acts as a thermal conductor to form the heat dissipation portion (300) and the thermal energy conduction portion (400) described later, and may be made of a thermally conductive material that is thermally connected to the electrode portion (100). Although the housing portion (200) is shown as a rectangular plate shape in the drawing, the specific shape of the housing portion (200) is not necessarily limited to this and can be implemented in various shapes such as circular or elliptical.

[0038] The housing part (200) may be made of the same material as the heat dissipation part (300) described later, and a fixing hole (210) may be formed at each end. Through the fixing hole (210), it can be stably attached and fixed to a wall, etc.

[0039] The heat dissipation portion (300) is provided on the upper surface of the housing portion (200) and is formed integrally with the housing portion (200). Here, the upper surface refers to the upper surface based on FIG. 1.

[0040] The heat dissipation unit (300) includes a plurality of heat dissipation plates (310) arranged to be spaced apart at regular intervals.

[0041] The heat sink (310) may be made of a metal material with excellent thermal conductivity, and preferably may be made of aluminum.

[0042] It is advantageous for the heat sinks (310) to be formed so as to extend along the width direction (W) of the housing part (200) and to be formed continuously at regular intervals along the length direction (L) so as to rapidly release heat within the electrical system to the outside, i.e., into the air, through convection using a plurality of heat sinks (310).

[0043] Specifically, the heat sink (310) may have a height of 30 to 50 mm, and the gap between two adjacent heat sinks (310) may be 9 mm or more. Accordingly, air in the atmosphere can pass through smoothly and quickly discharge heat into the air.

[0044] The thermal energy conduction part (400) is provided on the lower surface of the housing part (200) to reduce heat conducted through the electrode part (100). Here, the lower surface refers to the lower surface based on FIG. 1.

[0045] The thermal energy conducting part (400) may largely include a case part (410), a thermal energy conducting material part (420), and a cover part (not shown).

[0046] The case portion (410) is a space formed by sinking from the lower surface of the housing portion (200) toward the upper surface, and a receiving space is formed so that a metal-based compound can be filled inside.

[0047] The thermal energy conductive material part (420) includes a metal-based compound that is provided to be filled inside the case part (410). Heat conducted from the electrode part (100) moves to the thermal energy conductive material part (420) and then moves to the heat dissipation part (300) so that it is finally released into the air.

[0048] In order to transfer heat conducted from the electrode portion (100) to the heat energy conducting material portion (420), a connecting portion (430) may be further included to thermally connect one end of the electrode portion (100) and one end of the heat energy conducting material portion (420). That is, heat conducted through the electrode portion (100) is transferred to the heat energy conducting material portion (420) through the connecting portion (430), and then transferred to the heat dissipation portion (300) to be rapidly discharged into the air, thereby efficiently reducing heat energy within the electrical system.

[0049] The connecting part (430) may be formed in the shape of a bar made of metal material, preferably a busbar. The number of electrode parts (100) can be determined in correspondence with whether the electrical system is single-phase or three-phase, and at the same time, the number of connecting parts (430) can be determined in correspondence with the number of electrode parts (100). That is, it can be configured so that one connecting part (430) is connected to each electrode part (100).

[0050] Metallic compounds may include materials that simultaneously possess magnetic and insulating properties, and preferably may include metal oxides. By including metal oxides that simultaneously possess magnetic and insulating properties, it becomes possible to perform heat conduction while preventing phase-to-phase short circuits caused by the passage of current. Meanwhile, although metal oxides have a thermal conductivity that is about 5% to 6% lower than that of aluminum, copper, etc., they are suitable for use as conductive materials for dissipating heat within an electrical system.

[0051] A metal compound according to one embodiment of the present invention may include a first metal oxide comprising aluminum oxide (Al2O3); and one or more second metal oxides selected from the group consisting of iron oxide (Fe2O3), magnesium oxide (MgO), potassium oxide (K2O), and silicon dioxide (SiO2).

[0052] Specifically, with respect to 100 parts by weight of a metal compound, it may include 30 to 100 parts by weight of a first metal oxide, preferably 40 to 100 parts by weight, more preferably 45 to 95 parts by weight.

[0053] In addition, it may include 2 to 60 parts by weight, preferably 4 to 55 parts by weight, of a second metal oxide per 100 parts by weight of a metal compound.

[0054] As a preferred example, it may include 90 parts by weight of aluminum oxide (Al2O3) and 5 parts by weight of silicon dioxide (SiO2) per 100 parts by weight of a metal compound.

[0055] As another example, it may include 50 to 60 parts by weight of aluminum oxide (Al2O3), 30 to 40 parts by weight of silicon dioxide (SiO2), and 10 parts by weight of magnesium oxide (MgO) per 100 parts by weight of a metal compound.

[0056] As another example, it may include 50 parts by weight of aluminum oxide (Al2O3), 30 parts by weight of silicon dioxide (SiO2), 10 parts by weight of iron oxide (Fe2O3), and 10 parts by weight of magnesium oxide (MgO) per 100 parts by weight of a metal compound.

[0057] The thermal energy conductive material part (420) comprising a metal-based compound prepared to have the composition described above can secure thermal conductivity and insulation capable of blocking the passage of current between the electrode part (100), thereby enabling an electrically safe and effective heat release effect.

[0058] A metal-based compound according to one embodiment of the present invention can increase insulation properties by further including metal oxide-based impurities.

[0059] Specifically, it may contain 1 to 10 parts by weight, preferably 2 to 8 parts by weight, of two or more metal oxide-based impurities selected from the group consisting of sodium oxide (Na2O), barium oxide (BaO), zirconium oxide (ZrO2), and chromium oxide (Cr2O3) per 100 parts by weight of a metal-based compound.

[0060] The thermal energy conductive material part (420) containing the metal oxide-based impurities described above can maximize insulation properties, making it advantageous to use in high-voltage conditions, such as high-voltage power lines.

[0061] Meanwhile, while it is most advantageous to use the aforementioned metal oxide-based impurities directly, they may be added via bauxite and / or tourmaline minerals for ease of acquisition. Specifically, the maximization of the aforementioned insulating properties can be achieved by including 4 to 6 parts by weight of one or more minerals selected from the group consisting of bauxite and tourmaline per 100 parts by weight of a metal-based compound.

[0062] The thermal energy conductive material part (420) may further include a heat dissipation resin and a curing agent. Specifically, the heat dissipation resin may include an epoxy resin, and the thermal energy conductive material part (420) may form a film while being molded inside the case part (410) to block oxidation of the metal-based compound described above, while stably maintaining the performance and lifespan of the electrical system thermal energy reduction device including the thermal energy conductive material part (420).

[0063] To this end, it is advantageous for the compressive strength of the thermal energy conductive material part (420) to satisfy 100 MPa or more, preferably 110 MPa or more.

[0064] Meanwhile, the cover portion (not shown) is intended to protect the thermal energy conductive material portion (420) from the outside and may be provided to seal the case portion (410) in correspondence with the shape of the case portion (410). The cover portion may be made of the same material as the housing portion (200).

[0065] That is, the electrical system thermal energy reduction device (10) according to one embodiment of the present invention can eliminate the risk of short circuits by using a mixture of a plurality of metal oxides in a specific mixing ratio, while simultaneously utilizing conduction and convection characteristics to efficiently release thermal energy within the electric line (20) into the air.

[0066] More specifically, heat release is maximized by utilizing the convection characteristics resulting from the use of the aforementioned multiple heat sinks (310), and the amount of heat released is 34% to 36% when the wind speed is an average of 2.0 m / s, and 38% to 42% when the wind speed is an average of 2.4 m / s or higher. At this time, if the internal temperature of the electric line is 79℃, the surface temperature of the heat sink (310) of the electric system heat energy reduction device (10) is 52℃ or lower. This is the amount of heat released in a natural state, and if cooling is performed by attaching a cooling unit such as an air conditioner, which will be described later, to the electric system heat energy reduction device (10), the amount of heat released when the internal temperature of the electric line is 79℃ becomes 50% or higher, and the surface temperature of the heat sink (310) of the electric system heat energy reduction device (10) becomes 39℃ or lower.

[0067] Meanwhile, the reason for the high density of thermal energy (or thermal energy layer) resulting from heat generation within the electrical system is the increase in temperature and the resulting increase in current loss due to the internal resistance of the electric line. The internal resistance of the electric line can be divided into the intrinsic resistance component of the copper wire and the thermal resistance component that increases due to the internal temperature of the electric line. Factors that increase the temperature within the electric line include voltage, the thermal effects of current generated when current flows, harmonics, three-phase imbalance, starting current, phase difference of inductive loads, and heat introduced from mechanical devices. As the temperature rises due to these factors, the resistance component within the electric line increases, and because of this resistance component, electrical energy is converted into thermal energy, thereby increasing the amount of heat generated within the electrical system. In terms of temperature, the copper wire temperature is 17°C to 18°C ​​when mechanical devices are not in operation; however, if the mechanical operating load rate is 50%, the copper wire temperature averages 30 to 35°C, and if the load rate is 60%, the copper wire temperature rises to an average of 45°C to 50°C.

[0068] For example, the amount of thermal energy generated when an industrial air conditioner with a voltage of 380V, a current capacity of 15A, and a power factor of 80% is operating at a temperature of 35℃ in its electrical line and at a room temperature of 15℃ is calculated as follows.

[0069] (1) Resistivity: The heat quantity of an electric line due to an increase in temperature is calculated according to the formula mcCΔT, heat quantity (Cal) = mass of copper (m) : 63.5 x specific heat of copper (C) : 10.8 x temperature difference (ΔT : 35℃ - room temperature 15℃) = 63.5 x 10.8 x 20℃ = 13,716 Cal. When converted to thermal energy, this is 13.7 Kcal x 4,200 joule / 1 Kcal = 57,387 Joule.

[0070] (2) Thermal resistance component: The amount of heat according to the power consumption is based on the formula: power consumption (Kw) x 860 kcal, power consumption (W) = voltage 380 V x current 15 A x power factor: 0.8 x 3-phase current 1.732 = 1.97 kw. At this time, the amount of heat is 1.97 kw x 860 kcal = 1,694.2 kcal, and when converted to thermal energy, it is 1,694.2 kcal x 4,200 joule / 1 kcal = 7,115,640 joule.

[0071] When the thermal energy amounts according to (1) and (2) are combined, the total thermal energy amount is 7,173,027 Joules. The total heat amount of the air conditioner, 1,708 kcal, is the amount of heat required to raise 17 liters of water from 0°C to 100°C. When converted to 2L bottled water, this corresponds to 8.5 bottles. At this time, the amount of heat required to raise 1 liter of water by 1°C is 1 kcal. Since 1 kcal = 1°C, 100 kcal is required to raise 1 liter of water from 0°C to 100°C.

[0072] FIG. 3 is a manufacturing process diagram of a thermal energy conductive material part (420) of an electric system thermal energy reduction device (10) according to one embodiment of the present invention.

[0073] Referring to FIG. 3, step S100 is a step of preparing a metal oxide mixture, in which a plurality of metal oxides are mixed to form a metal-based compound. Here, the metal oxides include a first metal oxide, a second metal oxide, and metal oxide-based impurities, and the specific types and contents of each material are the same as previously described. At this time, each metal oxide may be mixed in a state where it has been ground to 100 to 120 mesh.

[0074] Step S200 is a step of preparing a liquid mixture by adding a heat dissipation resin and a curing agent to the manufactured metal oxide mixture, and the mixing process can be performed while stirring with a stirrer until liquefaction occurs. At this time, the heat dissipation resin may include epoxy resin, and the specific details are the same as those previously described.

[0075] Step S300 is a step of injecting the manufactured liquid mixture into the case portion (410), and the liquid mixture is injected slowly so that it fills the internal receiving space of the case portion (410) so that no air layer is formed. At this time, the connecting portion (430) connected to the electrode portion (100) may be pre-mounted inside the case portion (410), and the liquid mixture may be injected so that it completely covers the connecting portion (430) while the connecting portion (430) is mounted, and the amount injected may be sufficient to cover the cover portion (not shown) described later.

[0076] Step S400 is a step of applying vibration to remove air present in the injected liquid mixture, and by using a vibrator to vibrate the liquid mixture injected into the case part (410), the adhesion rate between the electrode part (100), the connection part (430), and the liquid mixture can be increased.

[0077] Step S500 is a step of drying the liquid mixture injected into the case part (410), and the thermal energy conductive material part (420) is manufactured by drying at room temperature for about 72 hours or by drying in a low-temperature drying oven for 24 hours. The surface of the manufactured thermal energy conductive material part (420) must not have a layer of bubbles or cracks.

[0078] Step S600 is a quality inspection step for the manufactured thermal energy conductive material part (420), in which a visual inspection is performed to check for bubble layers or cracks on the surface of the thermal energy conductive material part (420), and then the compressive strength is measured. If there are no abnormalities in the visual inspection results and the compressive strength is 110 MPa or higher, the cover part is assembled in Step S700 to end the manufacturing process, and if either the visual inspection or the compressive strength measurement results fall short of the standard, it is disposed of.

[0079] Meanwhile, the thermal energy conductive material part (420) that has passed quality inspection can be manufactured into a finished product of the electrical system thermal energy reduction device (10) and can perform a second verification process by additionally performing electrical inspections such as insulation resistance and withstand voltage tests.

[0080] The electrical system thermal energy reduction device (10) manufactured through the above-described process can be installed on the front and / or rear of an ACB (air circuit breaker) or MCCB (overcurrent circuit breaker) distribution panel, or mounted on a separate device and connected to multiple distribution panels. In the case of a wall distribution box that distributes small-scale power, it can be fixed to the upper and lower walls of the distribution box or mounted on the front of the distribution box cover.

[0081] In addition, the manufactured electric system heat energy reduction device (10) can be used by connecting it in parallel to the electric system line, and thus, even if the connection line of the electric system heat energy reduction device (10) is broken, it does not cause any problems in the operation of the existing machine.

[0082] An electrical system thermal energy reduction device (10) according to one embodiment of the present invention may further include a cooling unit (not shown).

[0083] The cooling unit may include a cooling device commonly used such as a fan and / or air conditioner, and by mounting this cooling unit on the electrical system heat energy reduction device (10), an even better heat energy reduction effect can be achieved.

[0084] For example, the amount of thermal energy can be reduced to 34% to 40% through an electric system thermal energy reduction device (10) to reduce the average temperature to 27°C or higher, and the amount of thermal energy can be reduced to 45% to 52% through an electric system thermal energy reduction device (10) equipped with a cooling unit to reduce the average temperature to 35°C or lower.

[0085] FIG. 4 is a diagram illustrating the technical principle of an electrical system thermal energy reduction device (10) according to one embodiment of the present invention.

[0086] Thermal energy within electrical systems forms uniform layers across all frequency bands, much like thermal noise in communication networks. Just as effective removal technology for thermal noise in communication networks has not been found, suitable technology to efficiently remove thermal energy in power systems has not yet been developed. This is because it is impossible to remove thermal energy that is widely distributed across all frequency bands (Hz to GHz). Although the terms thermal energy and thermal noise differ, they are essentially the same. Since the source of thermal noise is thermal energy generated by the increase in heat produced by electronic components that generate a large amount of heat, such as signal line resistors and transistors, it is impossible to remove thermal energy using noise filters made from electronic components with specific frequency characteristics.

[0087] The factors related to heat generation within an electrical system are the cross-sectional area, length, frequency, and temperature of the wires, but among these, only the temperature can be artificially changed. The present invention adopts a method of reducing thermal energy within an electrical system by releasing heat from the electric line (20) to the outside to lower the internal temperature.

[0088] FIG. 4 illustrates the process of heat transfer from an electric line (20) to an electric system heat energy reduction device (10). Heat within the electric line (20) is transferred to the electric system heat energy reduction device (10), which is not subjected to a load, through thermal equilibrium characteristics. Specifically, when metals are connected between different systems, heat is transferred from the side with a higher temperature to the side with a lower temperature (from left to right in FIG. 4). Due to the characteristic of maintaining the heat transfer path once it is established, heat is rapidly transferred to the electric system heat energy reduction device (10), which has a lower internal temperature compared to the electric line (20), and is finally released into the air. Accordingly, heat energy is reduced by the same amount across all frequency ranges.

[0089] Based on these technical principles, when installing an electrical system thermal energy reduction device (10) according to one embodiment of the present invention in an industrial plant, it is installed in each zone, and the magnitude of harmonics and line resistance can be significantly reduced by reducing the total amount of thermal energy within the zone.

[0090] Figure 5 shows the result of temperature change according to the installation of an electrical system thermal energy reduction device (10) according to one embodiment of the present invention.

[0091] Specifically, FIG. 5 shows the values ​​of the internal temperature of the electric line and the surface temperature of the electric system heat energy reduction device (10) measured with a thermal imaging camera by installing an electric system heat energy reduction device (10) in the tire molding machine line. The measurement point for the internal temperature of the electric line is the primary terminal of the breaker switch, and the measurement conditions were measured under natural cooling conditions on a day in May with an external temperature of 29℃ and a wind direction of 2.2 m / s.

[0092] Referring to the results of the electrical room BD1003A, the load rate is at the 60% level. Accordingly, although the temperature of each branch line varies from 48.9℃ to 73.6℃, ​​the average temperature is 53.6℃, ​​and it can be seen that if the load rate is at the 60% level, the internal temperature of the electrical line is at the 50℃ level.

[0093] Here, when the electrical system thermal energy reduction device (10) according to the present invention is installed, the surface temperature of the reduction device under natural convection conditions is 34.2°C, and the average temperature of the internal temperature of the electric line is reduced by 19.5°C, showing a temperature reduction rate of 36.5%. Through this, it can be seen that the thermal energy in the line can be reduced to a level of 64%. Generally, the thermal energy reduction rate is 3.2 to 3.4 times the temperature reduction rate.

[0094] Referring to the results of the electrical room BD1003B, the load rate is at the 50% level. Accordingly, although the temperatures of each branch line vary from 31℃ to 38℃, the average temperature is 33.9℃, which is an average decrease of 11.7℃ compared to the internal temperature of the electrical line, showing an average temperature reduction rate of 34.7%. Through this, it can be confirmed that thermal energy has been reduced by more than 39.2%.

[0095] Figure 6 is a result illustrating the thermal energy cluster characteristics.

[0096] More specifically, Figure 6 shows the magnitude of harmonics for a drainage pump that is activated when water reaches a certain level in the sump, and the thermal energy clustering characteristics can be identified through the change in harmonics depending on whether the drainage pump is activated.

[0097] Referring to Figure 6, the current value during the time period from 20:34:47 to 21:04:47, when the drainage pump is in operation, is approximately 34.1 A on average. At this time, the 2nd harmonic is 1.85 A to 1.86 A, the 3rd harmonic is 2.04 A to 2.30 A, the 4th harmonic is 1.03 A to 0.97 A, and the 10th harmonic is 0.48 A to 0.53 A, with the magnitude of the harmonics being a maximum of 2.30 A, which is a generally low level. In contrast, when the drainage pump is stopped, i.e., when the current value is 0A, during the time period from 21:14:47 to 21:34:47, the 2nd harmonic is 10.6A to 13.50A, the 3rd harmonic is 21.70A to 24.30A, the 4th harmonic is 6.58A to 6.01A, and the 10th harmonic is 4.52A to 4.68A. It can be seen that the magnitude of the harmonics increases rapidly when the drainage pump is stopped.

[0098] In other words, when the drainage pump is stopped, the magnitude of the second harmonic increases by 12 times, the magnitude of the third harmonic by 10 times, the magnitude of the fourth harmonic by 6 times, and the magnitude of the tenth harmonic by 4 times. This indicates that if a machine in the factory is temporarily stopped from operating, all thermal energy within the factory is concentrated and gathered in this machine. Consequently, due to this concentrated thermal energy, the deterioration of electronic components of PLCs or sensors is accelerated, leading to failures or malfunctions. To solve this problem, it is possible to install the electrical system thermal energy reduction device (10) according to the present invention in each zone of the factory.

[0099] Figure 7 is the result of measuring the level of heat energy reduction according to the installation of an electrical system heat energy reduction device (10) according to one embodiment of the present invention.

[0100] Specifically, FIG. 7 is a graph showing the harmonic removal rate by installing an electrical system thermal energy reduction device (10) in a compressor that continuously supplies compressed air and measuring the harmonics before and after installation.

[0101] While the magnitude of thermal noise can be measured in communication networks, there is no way to directly measure the magnitude of thermal energy in electrical systems due to the lack of measurement equipment. Therefore, the magnitude of thermal energy can be indirectly determined through the harmonic measurement function of a power analyzer.

[0102] FIG. 7(a) is a graph and table showing the reduction in harmonics from the 2nd to the 11th harmonics before and after the installation of the electrical system thermal energy reduction device (10), and FIG. 7(b) is a graph and table showing the reduction in harmonics from the 12th to the 20th harmonics before and after the installation of the electrical system thermal energy reduction device (10). Here, the X-axis represents the harmonic order, and the Y-axis represents the harmonic magnitude (%).

[0103] Referring to FIG. 7, before the installation of the electrical system thermal energy reduction device (10), the second harmonic is 6.33%, the third harmonic is 39.31%, the fourth harmonic is 15.84%, the fifth harmonic is 49.40%, and the seventh harmonic is 36.00%. However, when looking at the ratio of harmonics after the installation of the electrical system thermal energy reduction device (10), the second harmonic is reduced to 2.16%, a decrease of 65.9%; the third harmonic is reduced to 19.44%, a decrease of 51.3%; the fourth harmonic is reduced to 4.32%, a decrease of 72.7%; the fifth harmonic is reduced to 22.32%, a decrease of 54.8%; and the seventh harmonic is reduced to 13.68%, a decrease of 62.0%. In addition, the average decrease in thermal energy from the 2nd to the 20th cycle was found to be 64.2%.

[0104] Through this, it can be seen that heat within the electric line is released to the outside to lower the internal temperature, thereby reducing kinetic energy and consequently reducing thermal energy. That is, referring again to FIG. 7, the thermal energy layer was 18.18% before the installation of the electric system thermal energy reduction device (10), but decreased to 6.50% after installation. Therefore, through the electric system thermal energy reduction device (10), the thermal energy of the air compressor can be reduced to 64.2%. In this way, the magnitude and reduction rate of thermal energy within the electric system can be accurately determined.

[0105] The electrical system thermal energy reduction device (10) according to one embodiment of the present invention effectively reduces thermal energy within the electrical system, thereby preventing problems such as failure and malfunction of PLCs and sensors, deterioration of electronic components, voltage imbalance, current loss, and blackening of wiring switches, preventing flicker of the light, preventing a decrease in the illuminance of the light, and preventing fire in advance.

[0106] Meanwhile, in terms of electrical safety, the insulation resistance between terminals (A-phase, B-phase, C-phase) must be 10 MΩ or more for low voltages of 700 V or less, and 100 MΩ for high voltages of 700 V or more. Here, insulation resistance refers to preventing leakage current from occurring between terminals (A-phase, B-phase, C-phase) or between terminals and ground. The electrical system thermal energy reduction device (10) according to one embodiment of the present invention has excellent insulation characteristics of 50,000 MΩ, which is 500 times the standard, as it does not allow any current to flow and only moves heat. Therefore, even if a person comes into contact with the electrical system thermal energy reduction device (10), no electric shock accident occurs, and the safety against electric shock is at the same level as glass or plastic, which has very high insulation characteristics.

[0107] Meanwhile, conventionally, insulating oil and heat sinks are used to dissipate heat generated in the internal coils of electrical equipment, such as transformers, to the outside. Although transformers using insulating oil have a rated operating temperature of 65°C (ANSI C 57.12 standard), it is difficult to comply with this, so it is recommended to operate them up to the warning level of 95°C. The difficulty in lowering the operating temperature is mainly due to the fact that the coils of motors, which generate a significant amount of heat, are coated with enamel or covered with paper tape and fiberglass to prevent short circuits between coils, and the coil wires are located inside the core, preventing air from reaching the wires and thus making it impossible to effectively dissipate heat. Consequently, the current level of existing thermal energy reduction technology does not exceed a maximum of 22% of the heat generated.

[0108] The electrical system heat energy reduction device (10) according to one embodiment of the present invention can directly connect to the copper wire of a transformer or motor coil where actual heat is generated and release heat to the outside, so it can achieve a heat energy reduction efficiency of 60% or more, which is about 3 to 4 times higher than the existing heat release efficiency, and thus effectively solve problems such as the deterioration of PLC electronic components caused by heat energy, pressure reduction of hydraulic machinery in summer, overheating of wires in summer, and heat generation of motors, etc.

[0109] An electrical system thermal energy reduction device (10) according to one embodiment of the present invention can reduce failures and malfunctions of electronic components within electrical equipment by more than 90%. For example, if we look at a control device (PLC: Programmable Logic Controller) or a sensor attached to an industrial electrical device, the amount of power consumed by the device itself is very low. However, the equipment that experiences the most failures in a factory is the control device, the PLC, and the sensor. Although the PLC and the sensor generate very little heat on their own, they account for more than 90% of failures or malfunctions. The reason why failures occur frequently in industrial factories despite low power consumption is due to the thermal energy flowing into the PLC or sensor from the AC side. This occurs because the large amount of thermal energy generated by a machine using 380V and tens of A flows entirely into the PLC, which has a relatively low current consumption of about 1 A. Therefore, in order to reduce failures or malfunctions of the PLC or sensor, the amount of thermal energy flowing in from the AC side must be reduced. By installing an electrical system thermal energy reduction device (10) according to one embodiment of the present invention at the PLC power input terminal, the thermal energy flowing into the PLC can be reduced preemptively, thereby reducing the failure rate of the PLC or sensors by more than 90%. In addition, the effects of signal distortion and electromagnetic interference (EMI) of the PLC can be minimized due to the induced voltage caused by the inductance resulting from the magnetic field generated by the flow of current.

[0110] In addition, the electrical system thermal energy reduction device (10) according to one embodiment of the present invention can reduce the magnitude of all harmonics from the 2nd to the 50th order by more than 60%, up to a maximum of 78%.

[0111] Meanwhile, an active power filter capable of removing harmonics from the 2nd to the 50th order at once has recently been developed. Although such active power filters must be installed on every piece of machinery in a factory to achieve a removal rate of 90%, the high cost prevents the installation of large quantities. Furthermore, they can only be used at low voltages of 700V or less, and in reality, the average harmonic removal rate of industrial factories equipped with active power filters remains at the level of 38% to 43%, rather than exceeding 90%. In this invention, since thermal energy exists at a constant height across all frequency bands like thermal noise and harmonics are located above the thermal energy floor, lowering the thermal energy floor naturally lowers the frequency (harmonic), thereby reducing power loss and various failures caused by harmonics, which improves productivity and prevents accidents caused by machinery malfunctions.

[0112] In addition, the electrical system thermal energy reduction device (10) according to one embodiment of the present invention can reduce power loss due to heat, and when installed in an industrial plant, it can reduce power consumption by an average of 9% to 12%. Since the reactive power ratio of the industrial plant is high at 35%, it is possible to save 10% of power by using the electrical system thermal energy reduction device (10). Specifically, in the case of a general industrial plant, it is possible to save 28.5% of the reactive power, and in the case of an electric furnace with a purely resistive load, it is possible to save 50% to 74% of the reactive power.

[0113] An electrical system thermal energy reduction device (10) according to one embodiment of the present invention can be applied to low voltage (700V or less) and high voltage (22.9KV to 35KV), and can be manufactured in various shapes and sizes to suit the power consumption capacity, and can be used semi-permanently without failure and maintaining the same performance even without power supply. Explanation of the symbols

[0114] 10: Electrical system thermal energy reduction device 20: Electric line 100: Electrode part 200: Housing part 210: Fixing hole 300: Heat dissipation section 310: Heat sink 400: Thermal energy conduction part 410: Case part 420: Thermal energy conductive material part 430: Connection part

Claims

Claim 1 An electrical system thermal energy reduction device for reducing thermal energy within an electrical system, comprising: an electrode portion provided to be electrically connected to an electrical line; a housing portion made of a thermally conductive material connected to the electrode portion; a heat dissipation portion including a plurality of heat dissipation plates arranged to be spaced apart at a certain interval on the upper surface of the housing portion; and a thermal energy conduction portion provided on the lower surface of the housing portion to conduct heat conducted through the electrode portion without short circuit, wherein the thermal energy conduction portion includes a case portion having an internal receiving space formed therein, a thermal energy conducting material portion including a metal-based compound filled in the case portion to conduct heat within the electrical line, and a cover portion for sealing the case portion, wherein the thermal energy conducting material portion comprises 50 to 60 parts by weight of aluminum oxide (Al2O3), 30 to 40 parts by weight of silicon dioxide (SiO2), and 10 parts by weight of magnesium oxide (MgO) per 100 parts by weight of the metal-based compound. Claim 2 delete Claim 3 delete Claim 4 An electric system thermal energy reduction device according to claim 1, wherein the metal compound further comprises two or more metal oxide-based impurities selected from the group consisting of sodium oxide (Na2O), barium oxide (BaO), zirconium oxide (ZrO2), and chromium oxide (Cr2O3). Claim 5 delete Claim 6 An electrical system thermal energy reduction device comprising 1 to 10 parts by weight of the metal oxide-based impurity per 100 parts by weight of the metal-based compound in claim 4. Claim 7 In claim 1, the thermal energy conductive material part further comprises a heat dissipation resin and a curing agent, and is an electrical system thermal energy reduction device existing in a molded state. Claim 8 An electrical system thermal energy reduction device according to claim 1, further comprising a connecting part arranged to thermally connect the electrode part and the thermal energy conductive material part. Claim 9 An electrical system thermal energy reduction device according to claim 1, further comprising a cooling unit, wherein the cooling unit comprises a fan and / or an air conditioner. Claim 10 In claim 1, the electrical system thermal energy reduction device is an electrical system thermal energy reduction device having a harmonic magnitude reduction rate of 60% or more for 2nd to 50th order harmonics.

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