KR102527203B1 - Power generation system and method using the seebeck effect according to wastewater heat recovery - Google Patents

Abstract

The present invention relates to a system and a method for charging a battery by using the Seebeck effect of wastewater heat recovery, which can charge a battery with a current generated through the Seebeck effect caused by the temperature difference between recovered wastewater heat and the thermal energy of the temperature of air flowing thereinto from the outside of a sewer pipe. According to an embodiment of the present invention, the system for charging a battery by using the Seebeck effect of wastewater heat recovery as a power production system using the Seebeck effect of wastewater heat recovery, comprises: a heat exchanger which is installed in the inner space of a sewer pipe, makes direct contact with the wastewater flowing into the sewer pipe to recover wastewater heat from the wastewater through heat exchange with the wastewater, and generates a current through the Seebeck effect caused by the temperature difference between the wastewater heat and the thermal energy of the temperature of air flowing thereinto from the outside of the sewer pipe; and a generator which is connected to the heat exchanger, and includes a controller operating when receiving a preset current value from the heat exchanger, and a battery charged through accumulation of an excessive current when receiving the controller receives, from the heat exchanger, the excessive current exceeding the preset current value.

Description

Battery charging system and method using the seebeck effect according to wastewater heat recovery {Power generation system and method using the seebeck effect according to wastewater heat recovery}

The present invention relates to a battery charging system and method using the Seebeck effect according to wastewater heat recovery, and more particularly, to an electric current generated through the Seebeck effect due to a temperature difference between recovered wastewater heat and thermal energy of atmospheric temperature introduced from the outside of a sewage pipe. It relates to a battery charging system and method using the Seebeck effect according to the recovery of waste water heat capable of charging the battery.

Wastewater heat generated from wastewater, such as sewage and sewage, is an energy source that is generally discarded as waste heat in the process of transporting and treating wastewater. However, since wastewater has significant heat energy, wastewater heat is a new energy resource, and energy upcycling, which greatly improves energy efficiency, is emerging as an alternative that can maximize the use of limited resources and reduce environmental pollution.

In general, wastewater is a resource generated in homes or factories and flows along pipes to flow into a treatment plant. As a way to recover wastewater heat flowing into a treatment plant, a method of heat exchange with wastewater by placing a conductive material in a sewer pipe has been proposed, but the recovery efficiency of wastewater heat is low. In this case, there is a problem in that the conversion efficiency of electrical energy is also reduced.

Accordingly, it is necessary to prepare a method capable of improving the recovery efficiency of waste water heat and the conversion efficiency of electrical energy.

Republic of Korea Patent Registration No. 10-1734069 Republic of Korea Patent Registration No. 10-1334892

An object of the present invention is to recover wastewater heat from wastewater by using a heat exchanger composed of a plurality of thermally conductive layers in order to improve the recovery efficiency of wastewater heat. An object of the present invention is to provide a battery charging system and method using the Seebeck effect according to waste water heat recovery capable of charging a battery by supplying current generated through the Seebeck effect to a generator.

However, the technical problem to be achieved in the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned are clearly understood by those skilled in the art from the description below. It could be.

An electric power generation system using the Seebeck effect according to wastewater heat recovery according to an embodiment of the present invention for achieving the above object is installed on the inner space of a sewer pipe, and is in direct contact with the wastewater flowing into the sewer pipe to generate the wastewater A heat exchanger that recovers wastewater heat from the wastewater through heat exchange with the wastewater and generates current through the Seebeck effect due to the temperature difference between the wastewater heat and the heat energy of the air temperature introduced from the outside of the sewage pipe; and a controller connected to the heat exchanger and operated when a preset current value is supplied from the heat exchanger, and accumulation of the excess current when the controller receives an excess current exceeding the preset current value from the heat exchanger. A generator having a battery that is charged through; may include.

In addition, the power generation method using the Seebeck effect according to the waste water heat recovery performed by the power generation system using the Seebeck effect according to the waste water heat recovery includes: a) installing a heat exchanger on the inner space of the sewer pipe; b) introducing wastewater into the sewer pipe; c) The heat exchanger directly contacts the wastewater flowing into the sewer pipe to recover wastewater heat from the wastewater through heat exchange with the wastewater, and the Seebeck effect due to the temperature difference between the wastewater heat and the thermal energy of the ambient temperature introduced from the outside of the sewer pipe. Generating a current through; d) operating when a controller of the generator receives a predetermined current value from the heat exchanger; and e) charging the battery through accumulation of the excess current when the controller receives excess current exceeding the predetermined current value from the heat exchanger.

Since the present invention can recover wastewater heat from wastewater without causing environmental pollution and can charge a battery through current generated from the recovered wastewater heat, user convenience can be improved.

However, the effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

1 is a view showing components of a heat exchanger according to an embodiment of the present invention.
Figure 2 is a view for explaining the installation method of the heat exchanger shown in Figure 1.
3 is a diagram showing components of a generator according to an embodiment of the present invention.
4 is a diagram illustrating a process of a battery charging method using the Seebeck effect according to wastewater heat recovery according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

The meaning of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element. It should be understood that when an element is referred to as “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to a described feature, number, step, operation, component, part, or It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present invention.

battery charging system

Hereinafter, a battery charging system (hereinafter, 'battery charging system') using the Seebeck effect according to wastewater heat recovery according to an embodiment of the present invention will be described in detail.

The battery charging system is a system for charging the battery 230 with current generated based on the waste water heat recovered from the waste water in the process of discharging the waste water flowing in from the sewer pipe 10 to the outside. To this end, the heat exchanger 100 and a generator 200.

1 is a view showing components of a heat exchanger according to an embodiment of the present invention, and FIG. 2 is a view for explaining an installation method of the heat exchanger shown in FIG.

Referring to FIG. 1, the heat exchanger 100 recovers wastewater heat from wastewater through heat exchange with wastewater flowing into the sewage pipe 10, and is disposed on the inner space of the sewage pipe 10 for heat exchange with the wastewater.

Referring to FIG. 2 , the heat exchanger 100 is made in the form of a tube composed of a plurality of layers to recover waste water heat. In one embodiment, it may be made in the form of a pipe composed of layers from the first to the fourth layer.

In one embodiment, the heat exchanger 100 includes a first layer of the first thermal conductive material 110, a second layer of the thermal conductive film 120, and a third layer of the current collector 130 based on the center of the sewer pipe 10. , It may be made of four layers of the second thermally conductive material 140 .

The first thermally conductive material 110 is disposed on the first layer that can directly contact wastewater and is close to the center of the sewage pipe 10 based on FIG. 2 among the plurality of layers constituting the heat exchanger 100, ) in the form of a tube.

In one embodiment, when the first thermally conductive material 110 comes into direct contact with wastewater flowing into the sewer pipe 10, it recovers wastewater heat from the wastewater through direct heat exchange with the wastewater.

In one embodiment, the first thermally conductive material 110 is preferably made of a thermally conductive material in order to maximize the recovery efficiency of wastewater heat. The thermally conductive material is stainless steel or a thermally conductive polymer (eg, boron nitride, graphene, fin airgel, etc.).

The thermal conductive film 120 is disposed on the second layer, which is the space between the first thermal conductive material 110 and the current collector 130, based on FIG. 2 among a plurality of layers constituting the heat exchanger 100, and the heat exchanger ( 100) in the form of a tube surrounding the first thermally conductive material 110.

In one embodiment, the thermally conductive film 120 is used together with the second thermally conductive material 140 to recover (or flow in) wastewater through the first thermally conductive material 110 and the air introduced from the outside of the sewage pipe 10. The Seebeck effect can be generated by the temperature difference between thermal energies of temperature.

Here, the Seebeck effect means a phenomenon in which current flows due to a potential difference caused by a temperature difference between two contacts.

In one embodiment, the thermal conductive film 120 is implemented as a flexible element in which the sacrificial layer (SiO2 / a-Si), which is a silicon auxiliary substrate, is removed from the conventional Peltier element, and through this, it is manufactured according to the circular shape of the sewer pipe 10. 1 may be disposed on the inner space of the sewage pipe 10 in the form of wrapping the thermal conductive material 110.

In one embodiment, the thermally conductive film 120 may be made of a thermally conductive material (eg, metal oxide NaxCoO2, Ca3Co4O9, SrTiO3, etc., bioplymer nanocomposite, etc.) for generating the Seebeck effect.

In addition, the thermal conductive film 120 must be a material having ductility and moldable rigidity so that it can be rolled into a circular shape and inserted into the sewer pipe 10, and is installed on the inner space of the sewer pipe 10 and moves (or flows). ) It is preferable that bonding with the first thermally conductive material 110 is possible so that there is no.

The second thermally conductive material 140 is disposed on a fourth layer spaced apart from the thermally conductive film 120 with the current collector 130 therebetween based on FIG. 2 among the plurality of layers constituting the heat exchanger 100, and heat exchange It is formed in the form of a tube surrounding the current collector 130 on the group 100 .

In one embodiment, the second thermally conductive material 140 is used together with the thermally conductive film 120 between the wastewater heat recovered through the first thermally conductive material 110 and the thermal energy of ambient temperature introduced from the outside of the sewage pipe 10. The Seebeck effect can be generated by the temperature difference.

In one embodiment, like the thermal conductive film 140, the second thermally conductive material 140 is implemented as a flexible device in which the sacrificial layer (SiO2/a-Si), which is a silicon auxiliary substrate, is removed from the conventional Peltier device, through which It may be disposed on the inner space of the sewer pipe 10 in a form surrounding the current collector 130 according to the circular shape of the sewer pipe 10.

In one embodiment, the second thermally conductive material 140 may be made of a thermally conductive polymer (eg, boron nitride, graphene, graphene airgel, etc.) for generating the Seebeck effect.

In addition, the second thermal conductive material 140 must be a material having ductility and rigidity that can be molded so that it can be rolled into a circle and inserted into the sewer pipe 10, and after being installed on the inner space of the sewer pipe 10, the movement ( Or flow) is preferably capable of bonding with the thermal conductive film 120 so that there is no flow.

The current collector 130 is disposed on the third layer, which is a space between the thermal conductive film 120 and the second thermal conductive material 140, based on FIG. 2 among a plurality of layers constituting the heat exchanger 100, and the heat exchanger ( 100) is formed in the form of a tube surrounding the thermal conductive film 120.

In one embodiment, the current collector 130 is a passage for supplying current generated through the Seebeck effect by the thermal conductive film 120 and the second thermal conductive material 140 to the controller 220 of the generator 200. role can be fulfilled.

In one embodiment, the current collector 130 may be a material (eg, lithium polymer, lithium ion, polymer polymer, etc.) for serving as a passage for supplying current due to the Seebeck effect to the controller 220 .

3 is a diagram showing components of a generator according to an embodiment of the present invention.

Referring to FIG. 3 , the generator 200 includes a cable 210, a controller 220, a battery 230 and a controller 240.

The cable 210 is connected to the thermal conductive film 120 constituting the second layer of the heat exchanger 100 and the controller 220, and is movable from the thermal conductive film 120 by the current collector 130 to the heat exchanger ( 100) is transmitted.

In one embodiment, one end of the cable 210 is detachable from the controller 220 through a socket (not shown) provided on one side of the controller 220, and the other end can be detached from one side of the thermal conductive film 120. there is.

In one embodiment, the cable 210 may receive current from the heat exchanger 100 and supply it to the controller 220 when connected to one side of the thermally conductive film 120 while being connected to the controller 220 using a socket. .

The controller 220 controls the current received through the cable 210 connected to the socket on one side and the remote control received from the controller 240 to perform roles such as preventing overcharge, overdischarge, and reverse current of the battery 230. It operates based on the control signal.

In one embodiment, when the controller 220 receives an excess current exceeding a predetermined current value, which is a allowable current value for each standard for operation, from the cable 210, the excess current is discharged or the battery 230 is inserted into the socket. When connected, excess current is supplied to the battery 230 so that the battery 230 is charged.

In one embodiment, the controller 220 may receive a remote control signal from the control unit 240, and the operation may be controlled by the remote control signal of the control unit 240.

In one embodiment, the controller 220 may be provided with a display (not shown) displaying the current value supplied from the cable 210.

In one embodiment, the controller 220 may include a first communication unit (not shown) for receiving a remote control signal from the control unit 240 and transmitting a current value displayed on the display to the control unit 240 .

In one embodiment, the controller 220 is provided with a plurality of sockets on one side so that the cable 210 and the battery 230 are simultaneously connected, and the plurality of sockets may be composed of a cable socket and a battery socket.

The battery 230 is connected to a battery socket provided on one side of the controller 220 and can be charged by accumulating excess current supplied from the controller 220 .

In one embodiment, the battery 230 may be a power source for operating the control unit 240 when mounted on the control unit 240, but is not limited thereto, and a device required by the user in the maintenance process of the sewage pipe 10 (eg : It may be a power source for a walkie-talkie, etc.).

In one embodiment, based on the fact that a device required in the maintenance process is a radio, a user installs a battery charged with an excess current generated when wastewater heat is recovered from wastewater into the radio, thereby allowing other users to use radios equipped by other users. It is possible to proceed with the maintenance process of the sewage pipe 10 while contacting the user.

The controller 240 can be implemented as a terminal (eg, a smartphone, computer, tablet, etc.) provided by a user to remotely control the controller 220 .

In one embodiment, the controller 240 includes a button unit (not shown) for inputting a remote control signal, and a second button unit for transmitting a remote control signal to the controller 220 or receiving a current value from the controller 220. A communication unit (not shown) may be provided.

In one embodiment, when the controller 240 is implemented as a smartphone, it can communicate with the controller 220 by executing a remote control app (not shown) pre-stored in the smartphone, and can communicate with the controller 220. In this state, a remote control signal may be transmitted to the controller 220 or a current value may be received from the controller 220 .

How to charge the battery

Hereinafter, the process of the battery charging method (S10) using the Seebeck effect according to wastewater heat recovery according to an embodiment of the present invention performed by the battery charging system will be described in detail.

4 is a diagram illustrating a process of a battery charging method using the Seebeck effect according to wastewater heat recovery according to an embodiment of the present invention.

Referring to FIG. 4, the battery charging method (S10) includes a heat exchanger installation step (S11), wastewater inflow step (S12), current generation step (S13), controller operation step (S14), excess current generation/non-occurrence step ( S15), an excess current accumulation step (S16), and a controller operation maintenance step (S17).

First, the user places the heat exchanger 100 composed of the first thermally conductive material 110, the thermally conductive film 120, the current collector 130, and the second thermally conductive material 140 into the inner space of the sewage pipe 10. It can be installed on top (S11).

After that, wastewater may flow into the inner space of the sewage pipe 10 (S12).

After that, the heat exchanger 100 recovers wastewater heat from the wastewater by direct contact of the first thermally conductive material 110 with the wastewater, and the temperature difference between the wastewater heat of the wastewater and the thermal energy of the ambient temperature introduced from the outside of the sewage pipe 10 A current can be generated through the Seebeck effect (S13).

After that, the controller 220 of the generator 200 may be operated by a predetermined current value generated in the heat exchanger 100 (S14).

In the process of generating a current according to the Seebeck effect in the heat exchanger 100, an excess current exceeding a predetermined current value may or may not occur according to the generated current value (S15).

At this time, if excessive current is generated in the heat exchanger 100 (S15-YES), the battery 230 connected to the socket of the controller 220 receives the excess current from the controller 220, and the accumulated excess current It can be charged through (S16).

In contrast, if excessive current does not occur in the heat exchanger 100 (S15-NO), the controller 220 controls the heat exchanger 100 while maintaining current generation of a predetermined current value by the heat exchanger 100. It is operated through the current supplied from the battery 230 to prevent overcharge, overdischarge, and reverse current of the battery 230 .

Detailed descriptions of the preferred embodiments of the present invention disclosed as described above are provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a manner of combining with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the technical spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation relationship in the claims may be combined to form an embodiment or may be included as new claims by amendment after filing.

10: sewer pipe, 100: heat exchanger,
110: first thermally conductive material, 120: thermally conductive film,
130: current collector, 140: second thermal conductive material,
200: generator, 210: cable,
220: controller, 230: battery,
240: control unit.

Claims (10)

In the battery charging system,
It is installed on the inner space of the sewer pipe, directly contacts the wastewater flowing into the sewer pipe, recovers wastewater heat from the wastewater through heat exchange with the wastewater, and the temperature difference between the wastewater heat and the thermal energy of the ambient temperature introduced from the outside of the sewer pipe. A heat exchanger generating current through the Seebeck effect by; and
A controller connected to the heat exchanger and operated when a preset current value is supplied from the heat exchanger, and accumulation of the excess current when the controller receives an excess current exceeding the preset current value from the heat exchanger A generator having a battery that is charged through; includes,
The heat exchanger,
It is made in the form of a tube composed of a plurality of layers to recover wastewater heat from wastewater flowing into the sewer pipe,
A first thermally conductive material disposed on the first floor adjacent to the center of the sewer pipe, capable of direct contact with wastewater flowing from the sewer pipe, and recovering wastewater heat from the wastewater through direct heat exchange with the wastewater;
a thermal conductive film disposed in the second layer in a form surrounding the first thermal conductive material and being an element for the Seebeck effect;
a current collector disposed on a third layer in a form surrounding the thermally conductive film and serving as a passage for supplying current from the heat exchanger to the controller; and
A battery charging system using the Seebeck effect according to the recovery of waste water heat, characterized in that it includes a second thermal conductive material that is disposed on the fourth layer in a form surrounding the current collector and is an element for generating the thermal conductive film and the Seebeck effect. . delete delete According to claim 1,
The heat exchanger,
A current is generated through the Seebeck effect by the thermal conductive film and the second thermal conductive material, and the current by the Seebeck effect of the thermal conductive film and the second thermal conductive material is supplied to the controller using the current collector. A battery charging system using the Seebeck effect according to wastewater heat recovery, characterized in that for. According to claim 1,
The heat exchanger,
The battery charging system using the Seebeck effect according to wastewater heat recovery, characterized in that the thermal conductive film and the second thermal conductive material are flexible elements obtained by removing the sacrificial layer from the Peltier element, respectively. According to claim 1,
the generator,
a cable connected to the thermally conductive film and the controller, receiving current from the thermally conductive film and supplying current to the controller;
a controller for transmitting a remote control signal to the controller to remotely control the controller; and
It serves to prevent overcharge, overdischarge, and reverse current of the battery, and operates based on the current of the heat exchanger and the remote control signal transmitted through the cable, and the heat exchange received through the cable The battery charging system using the Seebeck effect according to waste water heat recovery, characterized in that it comprises a; the controller for transmitting the current value of the energy to the control unit. According to claim 6,
The controller,
a display displaying a current value supplied from the cable;
a first communication unit for receiving a remote control signal from the control unit and transmitting the current value displayed on the display to the control unit; and
A battery charging system using the Seebeck effect according to waste water heat recovery, comprising: a plurality of sockets for connecting the cable and the battery. According to claim 6,
The control unit,
a button unit for inputting the remote control signal; and
A battery charging system using the Seebeck effect according to wastewater heat recovery, characterized in that it includes a; second communication unit for transmitting a remote control signal to the controller or receiving a current value from the controller. According to claim 6,
The control unit,
Implemented as at least one of a smartphone, a computer, and a tablet terminal for remotely controlling the controller,
Based on the case implemented by the smartphone, a remote control app pre-stored in the smartphone is executed to communicate with the controller, and when communication with the controller is possible, a remote control signal is transmitted to the controller or from the controller. A battery charging system using the Seebeck effect according to wastewater heat recovery, characterized in that for receiving a current value. A battery charging method performed by a battery charging system,
a) installing the heat exchanger on the inner space of the sewage pipe;
b) introducing wastewater into the sewer pipe;
c) The heat exchanger directly contacts the wastewater flowing into the sewer pipe to recover wastewater heat from the wastewater through heat exchange with the wastewater, and the Seebeck effect due to the temperature difference between the wastewater heat and the thermal energy of the ambient temperature introduced from the outside of the sewer pipe. Generating a current through;
d) operating when a controller of the generator receives a predetermined current value from the heat exchanger; and
e) charging the battery through accumulation of the excess current when the controller receives excess current exceeding the preset current value from the heat exchanger;
The heat exchanger,
It is made in the form of a tube composed of a plurality of layers to recover wastewater heat from the wastewater flowing into the sewer pipe,
A first thermally conductive material disposed on the first floor adjacent to the center of the sewer pipe to directly contact wastewater flowing from the sewer pipe, and to recover wastewater heat from the wastewater through direct heat exchange with the wastewater;
a thermal conductive film disposed in the second layer in a form surrounding the first thermal conductive material and being an element for the Seebeck effect;
a current collector disposed on a third layer in a form surrounding the thermally conductive film and serving as a passage for supplying current from the heat exchanger to the controller; and
A battery charging method using the Seebeck effect according to waste water heat recovery comprising a; disposed on the fourth layer in a form surrounding the current collector and being an element for generating the thermal conductive film and the Seebeck effect. .

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