KR101309554B1 - Thermoelectric generation for independent power supply device use industrial waste heat - Google Patents

Abstract

PURPOSE: An independent power supply device for thermoelectric power generation type using industrial waste heat is provided to use as independent power and emergency power by increasing output of electromotive force according to temperature difference. CONSTITUTION: A stack (120) is connected to a waste heat vent of an industrial device and exhaust waste heat and diverging bypass stack on a sidewall. One or more of thermoelectric power generation parts (130) is arranged in parallel with an exhaustion direction of the waste heat in the stack. A cooling device (140) cools cooling side of the thermoelectric power generation part. A power conversion device is electrically connected to the thermoelectric power generation part and converts output power. A stovepipe is formed to have a bigger cross section at the location of the thermoelectric power generation part than the cross section at the location of an inlet exhaust pipe. [Reference numerals] (AA) Waste heat

Description

Thermoelectric Independent Power Supply Using Industrial Waste Heat {THERMOELECTRIC GENERATION FOR INDEPENDENT POWER SUPPLY DEVICE USE INDUSTRIAL WASTE HEAT}

The present invention relates to a thermoelectric type independent power supply using industrial waste heat, and more particularly, to a thermoelectric type independent power supply using industrial waste heat to thermoelectrically generate industrial waste heat using the Seebeck principle. will be.

In order to prevent natural disasters caused by global warming and extreme weather, the regulation of emission of carbon dioxide has been tightened, and along with the demand for clean energy, fuel cell power generation and thermoelectric power generation have been introduced.

Thermoelectric power generation converts heat into electricity using an integrated thermoelectric semiconductor, which can directly generate electricity through natural heat such as waste heat, solar heat, geothermal heat, and river water generated in incinerators and various industrial facilities. In the process, it does not emit environmentally harmful gases, generates no noise, and has recently been spotlighted as a semi-permanent clean electric generator.

Techniques related to such a facility using thermoelectric power have been proposed in Patent Registration No. 10-0138698 and Patent Registration No. 10-0965715.

Hereinafter, the supporting structures disclosed in Patent Registration No. 10-0138698 and Patent Registration No. 10-0965715 as prior arts will be briefly described.

FIG. 1 is a schematic view illustrating a combined power generation facility using fuel cell power generation and thermoelectric power generation of Patent Registration No. 10-0138698 (hereinafter, referred to as 'prior art 1'). As shown in FIG. 1, a conventional power generation system using fuel cell power generation and thermoelectric power generation includes a fuel cell 110 that generates waste heat at a current and a high temperature by an electrochemical reaction between hydrogen or natural gas and oxygen, and A fuel cell power generation facility including a low temperature fuel supply pipe 215 for supplying fuel to the fuel cell 110, and an exhaust gas pipe 220 for transferring high temperature exhaust gas generated from the fuel cell 110; And a first thermoelectric power module 230 having the fuel supply pipe 215 as a low heat absorber and the exhaust gas pipe 220 as a high heat absorber, and exhaust gas having passed through the exhaust gas pipe 220. And a thermoelectric generator including a second thermoelectric generator module 240 having the discharge flue 250 as a high heat source absorbing unit and an atmosphere as a low heat source absorbing unit.

However, in the combined cycle power generation system using thermoelectric power generation according to the prior art 1, the structure is complicated by the fact that each of the absorbers including the fuel supply pipe 215 as the low heat source absorber and the exhaust gas pipe 220 as the high heat source absorber is provided. There was a problem with getting lost.

2 is an assembly diagram of a thermoelectric power generation and heat generating apparatus of Patent Registration No. 10-0965715 (hereinafter referred to as 'prior art 2').

In the thermoelectric power generation and heat generating apparatus of the prior art 2, the thermoelectric power generation and heat generating apparatus includes a fuel tank (1), a blower (2), a fuel / air mixer (3), a burner (4) for combustion of fuel, and combustion. The thermoelectric module 5, which is attached to the inner wall of the boiler to generate electricity by the high temperature combustion heat, the water jacket 6 for cooling the low temperature part of the thermoelectric module, and the energy of the waste combustion gas are recovered secondarily to recover the steam of the waste combustion gas. Condensation recovery condensation heat exchanger (7), hot water or hot air to consume the thermal energy of the ondol or load device (8), hot water circulation pump (9).

However, the thermoelectric power generation and heat generating apparatus according to the prior art 2 attaches a thermoelectric element to the inner wall of the combustion chamber, but the structure is simple. However, the thermoelectric power generation capacity is limited by the limited size of the combustion chamber.

KR 10-0138698 B1 KR 10-0965715 B1

An object of the present invention is to solve the problems of the prior art as described above, by heating the heating side via the heat sink of the thermoelectric power module arranged in parallel with the exhaust direction of the waste heat through the industrial waste heat to be exhausted, the thermoelectric By cooling the cooling side of the power generation module through a separate cooling device, the output of the electromotive force increases according to the large temperature difference between the heating side and the cooling side, so it can be used as an independent power source or an emergency power source. To provide a low-cost, thermoelectric type independent power supply using industrial waste heat can be used as alternative energy.

In addition, another object of the present invention is to increase the cross-sectional area of the portion in which the thermoelectric power generation during communication is larger than the cross-sectional area of the neighboring exhaust port to improve the heat dissipation rate through the heat sink in accordance with the relatively low exhaust rate of the combustion gas It is to provide a thermoelectric type independent power supply using waste heat.

In addition, another object of the present invention is to provide a thermoelectric power generation independent power supply using industrial waste heat to arrange the fins of the heat sink in the shape of a comb to increase the surface area according to the absorption of heat.

According to a feature of the present invention for achieving the above object, the present invention is connected to the waste heat outlet of the industrial equipment, the waste heat is exhausted, the communication in which the bypass communication is branched to the side wall; At least one thermoelectric power generation unit disposed in parallel with the exhaust direction of the waste heat and thermoelectrically generated by the waste heat; A cooling device for cooling the cooling side of the thermoelectric generator; And a power conversion device electrically connected to the thermoelectric generator and converting output power.

The thermoelectric generator may include a pair of heat sinks absorbing and dissipating the waste heat, and a pair of thermoelectric modules provided on the inner wall of the heat sink to contact each other, and a neighboring cooling side of the thermoelectric module. Both side walls may be provided in contact with each other and may include a cooling member communicating with the cooling apparatus and the cooling water pipe.

In addition, the heat sink may be arranged in the shape of a comb teeth.

In addition, a power adjusting device for stabilizing the generated current between the thermoelectric module and the power converter may be further provided.

According to the present invention, the heating side is heated via a heat sink of a thermoelectric power module arranged in parallel with the exhaust direction of the waste heat through industrial waste heat to be exhausted, and the cooling side of the thermoelectric power module is cooled by a separate cooling device. By increasing the output of electromotive force according to the large temperature difference between the heating and cooling sides, it can be used as an independent power source or an emergency power source, and its simple structure has low maintenance cost and can be used as an alternative energy.

In addition, the present invention has the effect that the heat dissipation rate through the heat sink can be improved by making the cross-sectional area of the portion where the thermoelectric power is generated during communication to be larger than the cross-sectional area of the neighboring exhaust port and lowering the exhaust velocity of the combustion gas relatively.

In addition, the present invention has the effect of increasing the surface area according to the absorption of heat by arranging the fin of the heat sink in the shape of a comb.

1 is a configuration diagram schematically showing a complex power generation facility using a fuel cell power generation and thermoelectric power generation according to the prior art 1.
Figure 2 is an assembly diagram of a thermoelectric power generation and heat generating apparatus according to the prior art 2.
Figure 3 is a perspective view of a thermoelectric power generation independent power supply using the industrial waste heat according to the present invention.
Figure 4 is a perspective view partially enlarged the communication in the thermoelectric power generation independent power supply using the industrial waste heat according to the present invention.
5 is a side sectional view showing a thermoelectric generator in a thermoelectric power generation independent power supply using industrial waste heat according to the present invention.
FIG. 6 is an enlarged view of “A” of FIG. 5.
7 is a plan view showing a switchgear in a thermoelectric power generation independent power supply using industrial waste heat according to the present invention.

The terms or words used in the present specification and claims are intended to mean that the inventive concept of the present invention is in accordance with the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain its invention in the best way Should be interpreted as a concept.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term " part "in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

Hereinafter, with reference to the drawings will be described in detail the configuration of an embodiment of a thermoelectric power generation independent power supply using the industrial waste heat according to the present invention.

3 is a perspective view of a thermoelectric power generation independent power supply using the industrial waste heat according to the present invention, Figure 4 is partially enlarged for communication in the thermoelectric power generation independent power supply using the industrial waste heat according to the present invention. It is shown in a perspective view, Figure 5 is a thermoelectric generator in a thermoelectric power generation type independent power supply using the industrial waste heat according to the present invention is shown in a side cross-sectional view, Figure 6 "A" in Figure 5 is an enlarged view. 7 is a plan view of a switchboard in a thermoelectric power generation independent power supply using industrial waste heat according to the present invention.

According to these drawings, the thermoelectric power generation type independent power supply device 100 using the industrial waste heat according to the present embodiment is the frame 110, the communication 120, the thermoelectric generator 130, the cooling water pipe 140, the cooling device And a switchboard 150, a power adjusting device 152, a power conversion device 154, a battery 156, and a controller unit 158, and may be modularized by function or capacity.

Frame 110 is provided to have a set height to match the height of the waste heat outlet of the industrial equipment (not shown in the figure), such as boilers, incinerators, internal combustion engines and the inlet 122 of the independent power supply (100). In addition, a switchboard 150 is installed at a lower end of the frame 110 at a height at which the operator can operate the thermoelectric power generator 100.

The communication 120 is installed at the upper end of the frame 110 and is a straight passage through which combustion gas, which is a heat source of waste heat, is exhausted while flowing in an industrial apparatus. At this time, the bypass communication 126 is branched to the side wall of the communication 120, so that the communication 120 is blocked or a problem such as damage or failure of the thermoelectric generator 130 is burned through the bypass communication 126. To divert gas.

Here, the side wall of the communication 120 in which the bypass communication 126 communicates is provided with an opening and closing door operated by the drive means can be opened and closed under the control of the controller unit 158.

In particular, the inside of the communication 120 may be provided with a temperature sensor (not shown in the figure) for sensing the temperature. The temperature sensor outputs a signal to the controller unit 158 after sensing the waste heat temperature flowing in the communication 120. Since the waste heat temperature inside the communication 120 is sensed through the temperature sensor, when the waste heat temperature rises above the set temperature, the control of the controller unit 158 stops the operation of the industrial device, or the opening and closing door 120 ) In the direction of the bypass communication 126 rather than the exhaust port 124 side, so that the combustion gas escapes toward the bypass communication 126. This is to prevent the thermoelectric module 134 of the thermoelectric generator 130 from being damaged by heat when the temperature of the waste heat generated in the industrial device exceeds the range of 200 ~ 300 ℃.

Meanwhile, in the present embodiment, the cross-sectional shape of the communication 120 has been described as an example, but may be formed in a circular shape. In this case, the thermoelectric generator 130 is set at intervals along the inner circumferential surface of the communication. It can be arranged as.

In addition, the communication 120 has a cross-sectional area at the position where the thermoelectric generator 130 is provided, which is larger than the cross-sectional area at the inlet 122 or the exhaust port 124, so that the thermoelectric generator 130 is relatively installed. In this case, the flow rate of the combustion gas is reduced.

This is based on Bernoulli's theorem, which defines that the product of the fluid velocity and the cross-sectional area through which the fluid flows in a constant flow is constant. will be. As a result, by slowing the moving speed of the combustion gas, it is possible to substantially increase the heat absorption rate of the heat sink 136, thereby improving the endothermic rate of the thermoelectric module 134.

The thermoelectric generator 130 is at least one in the communication 120 to be disposed in parallel with the exhaust direction of the waste heat to perform thermoelectric generation by the waste heat, the cooling member 132, the thermoelectric module 134 and the heat sink ( 136). In this embodiment, the thermoelectric generator 130 is illustrated as being arranged in two rows of two on the upper and lower walls of the communication 120, but the number of arrays can be increased or decreased.

The cooling member 132 is provided on both sidewalls so as to contact the cooling side C of each thermoelectric module 134 so as to communicate with an external cooling device (not shown) and the cooling water pipe 140. That is, the cooling member 132 is a water jacket that cools the cooling side C of the thermoelectric module 134 through a water cooling method in order to maximize the amount of current generated by the thermoelectric module 134. .

In addition, an inlet and an outlet through which coolant is introduced and discharged are provided at one side wall of the cooling member 132.

As such, the cooling member 132 maintains an appropriate temperature of the thermoelectric module 134 and can control the abrupt temperature change. As a result, the cooling member 132 may precisely control the temperature difference between the heating side H and the cooling side C in the thermoelectric module 134.

The thermoelectric module 134 is provided with a pair, the heating side (C) is provided to contact both side walls of the cooling member 132 and the heating provided to contact each of the inner wall of the heat sink 136 provided as a pair It is composed of the side (H), by using the principle of Seebeck (seebeck) to give a difference in heat to the both sides of the metal of the heating side (H) and cooling side (C) by using the phenomenon that the current is generated due to the difference in electromotive force It is the module that makes progress.

Here, the thermoelectric module 134 is installed between the upper electrode 134a, the lower electrode 134b to which the anode and the cathode are connected, and the upper and lower electrodes 134a and 134b, and the upper and lower electrodes ( A plurality of P-type thermoconductors 134c and N-type thermoconductors 134d connected in series in a π-type so as to be energized by 134a) and 134b. In addition, insulating layers 134e are formed on the upper and lower electrodes, respectively. At this time, the thermoelectric module 134 preferably increases the temperature difference between the heating side H and the cooling side C in order to maximize the amount of current generated.

The heat sink 136 is a heat sink provided to contact the rear surface of each of the heating side H provided in the pair of thermoelectric modules 134. The heat sink 136 is made of a material having excellent heat transfer rate, and the surface area is increased. A plurality of upright pins thinly processed on the upper part is formed. In this case, the fins of the heat sink 136 may be arranged in a horizontal direction or a comb teeth. In this case, when the fin of the heat sink 136 has a comb shape, since the first combustion gas collides with the fin and moves along the inclined surface of the fin, there is an effect of widening the surface area. In addition, the fin shape of the heat sink 136 can be changed into a zigzag, a wave shape, etc.

The cooling water pipe 140 supplies a cooling water supplied from an external cooling device to the cooling member 132, and serves as a passage for recovering the used cooling water to the cooling device, and supplies the supply pipe 142 and the recovery pipe 144 to each other. Include.

That is, the cooling water pipe 140 is supplied to the cooling member 132 through the supply pipe 142, the cooling water of the set temperature, and the cooling water used after cooling the cooling member 132 pump (not shown in the figure) Through the recovery pipe 144 is installed is recovered to the cooling device.

At this time, the supply pipe 142 is bent in the horizontal direction in the vertical tube communicated in the cooling device, branched to the upper and lower sides of the communication 120 at the bent end, the upper and lower thermoelectric generator 130 for each branched tube The cooling members 132 are in communication with each other. In the same manner, the recovery pipe 144 is bent in a horizontal direction in a vertical tube communicating with the cooling apparatus, branched to the upper and lower sides of the communication 120 at the bent end, and the upper and lower thermoelectric generators for each branched tube ( Cooling members 132 of 130 are in communication with each other.

The switchboard 150 is installed at a lower end of the frame 110, and includes a power adjusting device 152, a power converter 154, a battery 156, a controller unit 158, a voltmeter, an ammeter, and the like.

The power adjusting device 152 converts the DC voltage by converting the direct current into an alternating current, and then stepping up or down by rectifying the transformer (not shown) to stabilize the generated current generated in the thermoelectric module 134. DC / DC CONVERTER. In this case, the power adjusting device 152 may be individually connected in series to each thermoelectric module 134 or may be parallel to a plurality of thermoelectric modules 134.

The power converter 154 is a DC / AC INVERTER that allows the power adjusted by the power regulator 150 to be immediately used (demanded) by DC and AC power according to a consumer's need.

The battery 170 is electrically connected between the power regulation device 152 and the power conversion device 154, thereby preventing the phenomenon that the power load frequently fluctuates rapidly during thermoelectric power generation and increases the discharge density. By reducing the density of the discharge to improve the durability for a long time, and by automatically replenishing the water of the battery 170 to the optimum level, it saves time and improves durability.

When the temperature of the waste heat rises above the set temperature, the controller unit 158 detects the temperature sensor, receives the result of the detection, and the opening and closing door operated by the driving means without the combustion gas being exhausted to the communication 120. Control to be exhausted to the bypass communication 126 through. In addition, the controller unit 158 controls the operations of the power regulator 152, the power converter 154, the battery 156, the controller unit 158, the voltmeter and the ammeter.

Therefore, the operation sequence of the thermoelectric power generation independent power supply using the industrial waste heat according to the present invention will be described.

First, when waste heat is introduced from the industrial device through the inlet 122 of the communication 120 communicating with the waste heat outlet of the industrial device, a plurality of thermoelectrics are disposed in parallel with the moving direction of the waste heat in the communication 120. It passes through the power generation unit 130.

Next, while the waste heat is absorbed by the heat sink 136 of the thermoelectric generator 130, high-temperature heat is transferred to the heating side H of the thermoelectric module 134 provided in contact with the heat sink 136. Since low temperature cold air is transmitted to the cooling side C of the thermoelectric module 134 in contact with the cooling member 132 through the cooling water, the difference in electromotive force according to the large temperature difference between the heating side H and the cooling side C. As a result, current is generated in the thermoelectric module 134.

Next, the current generated in the thermoelectric module 134 stabilizes the generated current generated in the thermoelectric module 134 through the power adjusting device 152, and the power adjusting device 152 through the power converter 154. The power adjusted in the above shall be immediately available as DC and AC power according to the needs of the consumers.

Here, since the battery 156 is provided between the power adjusting device 152 and the power conversion device 154, the phenomenon that the power load frequently changes rapidly during thermoelectric generation while storing electricity in the battery 156, The increase in discharge density is prevented.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the equivalents of the appended claims, as well as the appended claims.

100: thermoelectric independent power supply
110: frame 120: communication
130: thermoelectric generator 140: cooling water pipe
150: switchboard 152: power regulator
154: power converter 156: battery
158: controller unit

Claims (4)

A communication in which waste heat is exhausted by being connected to a waste heat outlet of the industrial device, and a bypass communication is branched to a side wall;
At least one thermoelectric power generation unit disposed in parallel with the exhaust direction of the waste heat and thermoelectrically generated by the waste heat;
A cooling device for cooling the cooling side of the thermoelectric generator; And
And a power converter electrically connected to the thermoelectric generator to convert output power.
The communication is a thermoelectric power generation independent power supply using the industrial waste heat, the cross-sectional area at the position provided with the thermoelectric generator is formed larger than the cross-sectional area at the inlet or exhaust position.
The thermoelectric generator of claim 1,
A pair of heat sinks absorbing and dissipating the waste heat;
A pair of thermoelectric modules are provided so that the heating side is in contact with the inner wall of the heat sink;
Both sides of the thermoelectric module adjacent to each other between the side is provided with a thermoelectric power generation independent power supply using the industrial waste heat including a cooling member and a communication member communicated through the cooling device and the cooling water pipe.
The method of claim 2,
The heat sink is a thermoelectric power generation independent power supply using the industrial waste heat, the fins are arranged in the shape of a comb.
The method of claim 1,
The thermoelectric power generation independent power supply using the industrial waste heat is further provided with a power adjusting device for stabilizing the generation current between the thermoelectric module and the power conversion device of the thermoelectric generator.

Images