Cold and hot water supply and power generation system comprising ceramic heating element coated with graphene

Abstract

One embodiment of the present invention relates to a cold and hot water supply and power generation system comprising a ceramic heating element coated with graphene, the system adjusting the temperature of cold water and hot water on the basis of a heat pump and the ceramic heating element coated with graphene, enabling utilization of the electricity generated by thermoelectric power generation on the basis of the temperature difference between the cold water and the hot water, and enabling the cold water and the hot water to be supplied to a place requiring the cold / hot water or to be utilized for cooling / heating.

Description

Hot and cold water supply and power generation system including graphene-coated ceramic heating element

[0001] The following examples relate to a hot and cold water supply and power generation system including a graphene-coated ceramic heating element, which controls the temperature of cold and hot water based on a graphene-coated ceramic heating element and a heat pump, and utilizes the generated power by thermoelectric generation based on the temperature difference between the cold and hot water, and supplies the cold and hot water to a demander or utilizes it for cooling / heating.

[0002] In facilities that use hot and cold water, such as swimming pools and bathhouses, the temperature of the water is controlled by using equipment such as heat pumps and boilers.

[0003] Because water has a high specific heat, a lot of energy is consumed in the process of heating / cooling large quantities of water to a desired temperature, and as a result, there is a problem that the energy consumption of facilities that utilize hot and cold water is bound to be very high.

[0004] Various technologies have been developed and utilized, such as technologies to improve the thermal efficiency / COP of heat pumps, technologies to improve the efficiency of boilers, and surface heating element technologies, but they have not been able to provide a fundamental solution to energy consumption.

[0005] The problem to be solved by one embodiment of the present invention is to provide a hot and cold water supply and power generation system including a graphene-coated ceramic heating element, which generates hot water based on an electric heating element using graphene, generates cold water based on a heat pump, and harvests energy by configuring a thermoelectric generator based on the temperature difference between the generated hot water and cold water, in order to overcome the limitations of the conventional hot and cold water supply system as described above.

[0006] According to one embodiment, a hot and cold water supply and power generation system including a graphene-coated ceramic heating element is provided, including: a cold water tank containing water therein; a hot water tank containing water therein; a heat pump transferring heat from the cold water tank to the hot water tank; a thermoelectric element unit generating electricity based on a temperature difference between water contained in the cold water tank and the hot water tank; a graphene-coated ceramic heating element heating water contained in the hot water tank; and an ESS (Energy Storage System) storing electricity produced by the thermoelectric element unit.

[0007] In addition, the heat pump comprises: a compressor for compressing a refrigerant; a first heat exchanger connected to the compressor and transferring heat between water supplied from the cold water tank and the refrigerant; a first water pipe for supplying water from the cold water tank to the first heat exchanger; a second water pipe for supplying water that has passed through the first heat exchanger to the cold water tank; a first pump connected to one side of the first water pipe or the second water pipe; a second heat exchanger connected to the compressor and transferring heat between water supplied from the hot water tank and the refrigerant; a third water pipe for supplying water from the hot water tank to the second heat exchanger; a fourth water pipe for supplying water that has passed through the second heat exchanger to the graphene-coated ceramic heating element; a fifth water pipe for supplying water that has passed through the graphene-coated ceramic heating element to the hot water tank; And a second pump connected to one side of the third water pipe, the fourth water pipe, or the fifth water pipe; wherein the thermoelectric element portion may include: a thermoelectric element pad having a low-temperature portion on one side and a high-temperature portion on the other side; a first heat-conducting portion attached to the low-temperature portion; a second heat-conducting portion attached to the high-temperature portion; a first convection pipe that receives water from the lower part of the cold water tank, passes through the first heat-conducting portion, and discharges the water to the upper part of the cold water tank; a second convection pipe that receives water from the upper part of the hot water tank, passes through the second heat-conducting portion, and discharges the water to the lower part of the hot water tank; a third pump connected to the first convection pipe; and a fourth pump connected to the second convection pipe.

[0008] And, the thermoelectric element pads are: a plurality of which are arranged in a grid shape of a predetermined size of m X n (m, n: natural numbers), and the first convection pipe includes: a 1-1 convection pipe extending upward from the bottom of the cold water tank; a 1-2 convection pipe branched m times from an end of the 1-1 convection pipe, each branched pipe being arranged horizontally to correspond to one row of the thermoelectric element pad, and passing through the first heat-conducting section; and a 1-3 convection pipe extending so as to be connected to the upper portion of the cold water tank by merging from the ends of the plurality of 1-2 convection pipes; and the second convection pipe includes: a 2-1 convection pipe extending downward from the top of the hot water tank; It may include a 2-2 convection pipe that branches off from the end of the 2-1 convection pipe by m numbers, and each branched pipe is arranged horizontally to correspond to one row of the thermoelectric element pad, and passes through the 2nd heat-conducting section; and a 2-3 convection pipe that merges from the ends of a plurality of the 2-2 convection pipes and extends to be connected to the lower portion of the hot water tank.

[0009] In addition, the control unit includes a voltage measuring unit for measuring the voltage of each of the thermoelectric element pads; and a control unit connected to the voltage measuring unit for monitoring the thermoelectric element, wherein the control unit is controlled according to a control method including: a step of measuring the voltage of each of the thermoelectric element pads in correspondence with a unique number assigned to each of the thermoelectric element pads; a step of verifying a failure by thermoelectric element pad column; a step of verifying a failure by thermoelectric element pad row; a step of verifying a failure for a thermoelectric element pad based on an adjacent thermoelectric element pad; a step of monitoring the amount of power generated from the entire thermoelectric element pad; and a step of controlling a ceramic heating element and a first to fourth pumps coated with graphene based on the amount of power generated; wherein the step of verifying a failure by thermoelectric element pad column includes: a first column verification step of designating, based on the unique number, first-first thermoelectric element pads arranged in the same column among the thermoelectric element pads arranged in a grid shape; In the case where there are 1-2 thermoelectric element pads arranged on the left side of the 1-1 thermoelectric element pads with respect to the 1-1 thermoelectric element pads: a second thermal verification step of calculating a 1-1 ratio by comparing the sum of the voltages of the 1-1 thermoelectric element pads with the sum of the voltages of the 1-2 thermoelectric element pads; In the case where there are 1-3 thermoelectric element pads arranged on the right side of the 1-1 thermoelectric element pads with respect to the 1-1 thermoelectric element pads: a third thermal verification step of calculating a 1-2 ratio by comparing the sum of the voltages of the 1-1 thermoelectric element pads with the sum of the voltages of the 1-3 thermoelectric element pads; In the case where each of the 1-1 ratio and the 1-2 ratio exceeds the previously specified 1-1 reference ratio and the 1-2 reference ratio: a fourth thermal verification step of recording the unique numbers of the 1-1 thermoelectric element pads as targets for defect verification; And based on the unique number, a first repetition step of repeating the first to fourth column verification steps for the columns of all thermoelectric element pad grids;Including, the step of verifying a failure by the thermoelectric element pad row includes: a first row verification step of designating 2-1 thermoelectric element pads arranged in the same row among the thermoelectric element pads arranged in a grid shape based on the unique number; a second row verification step of calculating a 2-1 ratio by comparing a sum of voltages of the 2-1 thermoelectric element pads with a sum of voltages of the 2-2 thermoelectric element pads when there are 2-2 thermoelectric element pads arranged on top of the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads; a third row verification step of calculating a 2-2 ratio by comparing a sum of voltages of the 2-1 thermoelectric element pads with a sum of voltages of the 2-3 thermoelectric element pads when there are 2-3 thermoelectric element pads arranged on bottoms of the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads; In the case where each of the 2-1 ratio and the 2-2 ratio exceeds the previously designated 2-1 reference ratio and the 2-2 reference ratio: a fourth row verification step of recording the unique numbers of the 2-1 thermoelectric element pads as targets for failure verification; and a second repetition step of repeating the first row verification step to the fourth row verification step for rows of all thermoelectric element pad grids based on the unique numbers; wherein the step of verifying a failure for the thermoelectric element pads includes: a first adjacent verification step of recording, based on the unique numbers, thermoelectric element pads arranged at the outermost ends among the thermoelectric element pads arranged in a grid shape as targets for failure verification; a second adjacent verification step of designating, based on the unique numbers, a 3-1 thermoelectric element pad, which is one of the thermoelectric element pads recorded as targets for failure verification; In the case where a 3-2 thermoelectric element pad is positioned on top of the 3-1 thermoelectric element pad for the 3-1 thermoelectric element pad: a third adjacent verification step of calculating a 3-1 ratio by comparing the voltage of the 3-1 thermoelectric element pad and the voltage of the 3-2 thermoelectric element pad;In the case where there is a 3-3 thermoelectric element pad disposed below the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a fourth adjacent verification step of calculating a 3-2 ratio by comparing the voltage of the 3-1 thermoelectric element pad with the voltage of the 3-3 thermoelectric element pad; In the case where there is a 3-4 thermoelectric element pad disposed on the left side of the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a fifth adjacent verification step of calculating a 3-3 ratio by comparing the voltage of the 3-1 thermoelectric element pad with the voltage of the 3-4 thermoelectric element pad; In the case where there is a 3-5 thermoelectric element pad disposed on the right side of the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a sixth adjacent verification step of calculating a 3-4 ratio by comparing the voltage of the 3-1 thermoelectric element pad with the voltage of the 3-5 thermoelectric element pad; If all of the values ​​calculated among the 3-1 to 3-4 ratios exceed the previously designated 3-1 to 3-4 reference rates: a 7th adjacent verification step of recording the unique number of the 3-1 thermoelectric element pad as defective; and a 3rd repetition step of repeating the 1st adjacent verification step to the 7th adjacent verification step for all the thermoelectric element pads based on the unique number;

[0010] In addition, the cold water tank and the hot water tank are each provided with a temperature sensor, and the step of controlling the graphene-coated ceramic heating element and the first to fourth pumps comprises: when the amount of power generation measured from the entire thermoelectric element pad is less than a first reference: a step of adjusting the set temperature of the graphene-coated ceramic heating element to a first temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the first reference and less than a second reference: a step of adjusting the set temperature of the graphene-coated ceramic heating element to a second temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the second reference and less than a third reference: a step of adjusting the set temperature of the graphene-coated ceramic heating element to a third temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the third reference: a step of adjusting the set temperature of the graphene-coated ceramic heating element to a fourth temperature; The method may include: when the operating times of the third pump and the fourth pump are less than the fourth standard: adjusting the output of the third pump and the fourth pump to the first RPM; when the operating times of the third pump and the fourth pump are greater than or equal to the fourth standard: adjusting the output of the third pump and the fourth pump to the second RPM; when the water temperature inside the cold water tank is less than the fifth standard: adjusting the output of the first pump to the third RPM; when the water temperature inside the cold water tank is greater than or equal to the fifth standard: adjusting the output of the first pump to the fourth RPM; when the water temperature inside the hot water tank is less than the sixth standard: adjusting the output of the second pump to the fifth RPM; and when the water temperature inside the hot water tank is greater than or equal to the sixth standard: adjusting the output of the second pump to the sixth RPM.

[0011] According to one embodiment, a system capable of generating hot and cold water and providing cooling, heating, hot water supply, cold water supply, and thermoelectric power generation can be configured.

[0012] Additionally, energy can be harvested by generating electricity without a separate motor / rotating machine.

[0013] And, by increasing the temperature of hot water based on a graphene-based heating element (water heating device), the temperature difference between cold water and hot water can be maintained at 50 to 60 degrees.

[0014] Additionally, the efficiency of thermoelectric power generation can be improved based on the temperature difference between cold and hot water.

[0015] Additionally, by utilizing hundreds of thermoelectric elements to generate thermoelectric power, an appropriate amount of power generation can be maintained even if some of the thermoelectric elements fail or a problem occurs in a part of the circuit.

[0016] Additionally, by monitoring the power generation or voltage, the exact location of the problematic thermoelectric element can be identified.

[0017] In addition, by monitoring the power generation, if the power generation is insufficient, the power generation can be increased / maintained by increasing the temperature difference between cold water and hot water, matching the temperature of the contact surface of the thermoelectric element with the temperature of the cold water / hot water, or increasing the flow rate of water flowing through the heat exchanger.

[0018] In addition, by reducing the number of repetitions / load in the process of detecting a thermoelectric element with a problem among thermoelectric elements, heat generation and power consumption in the device (control unit) can be reduced.

[0019] FIG. 1 is a system diagram showing a hot and cold water supply and power generation system including a ceramic heating element coated with graphene according to one embodiment of the present invention.

[0020] FIG. 2 is a drawing showing a convection pipe of a hot and cold water supply and power generation system including a ceramic heating element coated with graphene according to one embodiment of the present invention.

[0021] FIG. 3 is a drawing showing a thermoelectric element pad (in the form of a grid) of a hot and cold water supply and power generation system including a ceramic heating element coated with graphene according to one embodiment of the present invention.

[0022] FIG. 4 is a side cross-sectional view showing a thermoelectric element portion of a hot and cold water supply and power generation system including a ceramic heating element coated with graphene according to one embodiment of the present invention.

[0023] FIG. 5 is a photograph showing a hot and cold water supply and power generation system including a ceramic heating element coated with graphene according to one embodiment of the present invention.

[0024] Hereinafter, embodiments are described in detail with reference to the attached drawings. However, the embodiments may be modified in various ways, and the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, or alternatives to the embodiments are included within the scope of the patent application.

[0025] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of this specification includes modifications, equivalents, or alternatives that fall within the technical concept.

[0026] Although terms such as "first" or "second" may be used to describe various components, these terms should be interpreted solely to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

[0027] When it is said that a component is "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0028] The terms used in the examples are for illustrative purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood to not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0029] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments pertain. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0030] In addition, when describing with reference to the attached drawings, identical components will be assigned the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted. When describing embodiments, if a detailed description of a related known technology is judged to unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

[0031] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0032] In the embodiments of the present invention, unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0033] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the matters illustrated. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When the terms “includes,” “has,” and “consists of” are used in this specification, other parts may be added unless “only” is used. When a component is expressed in the singular, it includes a case where the plural is included unless there is a specifically explicit description.

[0034] When interpreting a component, it is interpreted as including the error range even if there is no separate explicit description.

[0035] When describing a positional relationship, for example, when the positional relationship between two parts is described as 'on top of', 'upper part of', 'lower part of', 'next to', etc., one or more other parts may be located between the two parts, unless 'right away' or 'directly' is used.

[0036] The size and thickness of each component shown in the drawing are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the component shown.

[0037] The individual features of the various embodiments of the present invention can be partially or wholly combined or combined with each other, and as can be fully understood by those skilled in the art, various technical connections and operations are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship.

[0038] According to one embodiment, a hot and cold water supply and power generation system including a graphene-coated ceramic heating element (5) is provided, which includes: a cold water tank (1) containing water therein; a hot water tank (2) containing water therein; a heat pump (3) transferring heat from the cold water tank (1) to the hot water tank (2); a thermoelectric element (4) generating electricity based on a temperature difference between water contained in the cold water tank (1) and the hot water tank (2); a graphene-coated ceramic heating element (5) heating the water contained in the hot water tank (2); and an ESS (6) (Energy Storage System) storing electricity produced by the thermoelectric element (4).

[0039] The above cold water tank (1); and hot water tank (2); are each provided with insulation to prevent heat loss, and cold water and hot water can be stored inside them, respectively.

[0040] The temperatures of the cold water and hot water may vary depending on the design of the heat exchanger and the graphene-coated ceramic heating element (5), and it is preferable that the temperature difference between the cold water and hot water be maintained at 50 to 60 degrees to increase the efficiency of thermoelectric power generation.

[0041] The above heat pump (3); preferably uses a product having a COP of 3.5 or higher, and the compressor (31) compresses the refrigerant and transfers heat from the cold water tank (1) to the hot water tank (2) through heat exchangers arranged on both sides (cold water side / hot water side). The general structure / configuration of the heat pump (3) is a known technology, so a detailed description is omitted.

[0042] In the above thermoelectric element (4) (Peltier element);, it contacts the cold water contained in the cold water tank (1) and the hot water contained in the hot water tank (2), respectively, and generates electricity based on the temperature difference between the two waters.

[0043] At this time, since it is difficult to form a high temperature difference (high hot water temperature) with only the heat pump (3), a graphene-coated ceramic heating element (5) is included to heat the water contained in the hot water tank (2), and the water, which has passed through the heat exchanger and has a higher temperature than before, is additionally heated by the graphene-coated ceramic heating element (5).

[0044] Here, the ceramic heating element (5) coated with the graphene can be implemented based on known technologies such as Patent Document 1, so a detailed description is omitted.

[0045] The above ESS (6) (Energy Storage System) has a known general configuration and may include a configuration of an inverter, a converter, a battery pack, a control board, etc.

[0046] In addition, the heat pump (3) comprises: a compressor (31) for compressing a refrigerant; a first heat exchanger (32) connected to the compressor (31) and transferring heat between water supplied from the cold water tank (1) and the refrigerant; a first water pipe (33) for supplying water from the cold water tank (1) to the first heat exchanger (32); a second water pipe (34) for supplying water passing through the first heat exchanger (32) to the cold water tank (1); a first pump connected to one side of the first water pipe (33) or the second water pipe (34); a second heat exchanger (35) connected to the compressor (31) and transferring heat between water supplied from the hot water tank (2) and the refrigerant; a third water pipe (36) for supplying water from the hot water tank (2) to the second heat exchanger (35); A fourth water pipe (37) for supplying water passing through the second heat exchanger (35) to the ceramic heating element (5) coated with graphene; a fifth water pipe (38) for supplying water passing through the ceramic heating element (5) coated with graphene to the hot water tank (2); and a second pump connected to one side of the third water pipe (36), the fourth water pipe (37), or the fifth water pipe (38); wherein the thermoelectric element (4) comprises: a thermoelectric element pad having a low-temperature portion (411) on one surface and a high-temperature portion (412) on the other surface; a first heat-conducting portion (421) attached to the low-temperature portion (411); a second heat-conducting portion (422) attached to the high-temperature portion (412); It may include a first convection pipe (51) that receives water from the lower portion of the cold water tank (1), passes through the first heat-conducting portion (421), and discharges the water to the upper portion of the cold water tank (1); a second convection pipe (52) that receives water from the upper portion of the hot water tank (2), passes through the second heat-conducting portion (422), and discharges the water to the lower portion of the hot water tank (2); a third pump connected to the first convection pipe (51); and a fourth pump connected to the second convection pipe (52).

[0047] The above refrigerant can be selected from known refrigerants depending on the appropriate temperatures of the cold water tank (1) and the hot water tank (2).

[0048] A predetermined refrigerant circuit / flow path can be configured between the compressor (31), the first heat exchanger (32), and the second heat exchanger (35).

[0049] The above first heat exchanger (32) cools water based on heat transfer between water and a refrigerant cooled to a temperature lower than the cold water temperature.

[0050] Water is transferred from the cold water tank (1) to the first heat exchanger (32) through the first water pipe (33), and after passing through the first heat exchanger (32), it returns to the cold water tank (1) through the second water pipe (34).

[0051] Here, water flows based on the power of the first pump connected to the first water pipe (33) or the second water pipe (34).

[0052] The above second heat exchanger (35) heats water based on heat transfer between the heated refrigerant and water.

[0053] Water is transferred from the hot water tank (2) to the second heat exchanger (35) through the third water pipe (36), and after passing through the second heat exchanger (35), is transferred to the ceramic heating element (5) coated with graphene through the fourth water pipe (37), is heated, and reaches a set temperature (slightly higher than the target temperature of the hot water) and returns to the hot water tank (2) through the fifth water pipe (38).

[0054] Here, water flows based on the power of the second pump connected to one side of the third water pipe (36) to the fifth water pipe (38).

[0055] The thermoelectric element pad has one side as a cooling side and the other side as a heating side, and when generating thermoelectric power, one side functions as a low-temperature part (411) and the other side functions as a high-temperature part (412).

[0056] Although thermoelectric power generation is possible only when hot and cold water are brought into contact with both sides of the thermoelectric element pad, if the cold water tank (1) and the hot water tank (2) are placed too close together and heat transfer occurs between the cold water and the hot water, the heat loss is very large. Therefore, it is preferable to configure the thermoelectric element pad so that water is taken out from the cold water tank (1) and the hot water tank (2) respectively and brought into contact with the low-temperature part (411) and the high-temperature part (412), respectively, of the thermoelectric element pad.

[0057] In the description of the present invention, a 'thermoelectric element' generally available on the market is referred to as a 'thermoelectric element pad'. The 'thermoelectric element unit (4)' refers to a thermoelectric power generation system equipped with a plurality (hundreds) of thermoelectric element pads.

[0058] The first heat-conducting portion (421) and the second heat-conducting portion (422) are preferably made of a metal with high thermal conductivity, such as copper or aluminum, and thermal grease or the like can be applied to the low-temperature portion (411) and the high-temperature portion (412), and then the first heat-conducting portion (421) and the second heat-conducting portion (422) can be attached.

[0059] At this time, the first heat-conducting portion (421) and the second heat-conducting portion (422) may be provided singly, or may be provided for each individual thermoelectric element pad.

[0060] A predetermined pipe / hole is formed on one side of the first heat-conducting part (421) and the second heat-conducting part (422) so that water can flow, and water flows through the pipes of the first heat-conducting part (421) and the second heat-conducting part (422) to cool / heat the low-temperature part (411) and the high-temperature part (412) to the temperature of cold water and hot water, respectively.

[0061] The third pump and the fourth pump supply water to the first heat conducting portion (421) and the second heat conducting portion (422) through the first convection pipe (51) and the second convection pipe (52), respectively.

[0062] And, the thermoelectric element pads are: arranged in a grid shape with a plurality of m X n sizes (m, n: natural numbers), the first convection pipe (51) includes: a 1-1 convection pipe (511) extending upward from the bottom of the cold water tank (1); a 1-2 convection pipe (512) branched m times from the end of the 1-1 convection pipe (511), each branched pipe being arranged horizontally to correspond to one row of the thermoelectric element pad, and passing through the first heat-conducting part (421); and a 1-3 convection pipe (513) extending so as to be connected to the upper portion of the cold water tank (1) by merging from the ends of the plurality of 1-2 convection pipes (512); and the second convection pipe (52) includes: a 2-1 convection pipe (521) extending downward from the top of the hot water tank (2); It may include a 2-2 convection pipe (522) that branches off from the end of the 2-1 convection pipe (521) by m numbers, and each branched pipe is horizontally arranged to correspond to one row of the thermoelectric element pad, and passes through the 2nd heat-conducting part (422); and a 2-3 convection pipe (523) that merges from the ends of a plurality of the 2-2 convection pipes (522) and extends to be connected to the lower portion of the hot water tank (2).

[0063] Here, the above 'grid shape' means a shape in which a large number (hundreds) of thermoelectric element pads are arranged in m rows and n columns.

[0064] For example, in an embodiment having 300 thermoelectric element pads, the thermoelectric element pads may be arranged in 20 rows and 15 columns.

[0065] The thermoelectric element pads arranged in this grid pattern are illustrated in Fig. 3 (size 8 X 12).

[0066] The above first convection pipe (51) is: a single pipe extending upward from the bottom of the cold water tank (1), the water discharged through the 1-1 convection pipe (511); flows into the 1-2 convection pipe (512) which is divided into m (the number of rows of the grid) and consists of m horizontal pipes, and cools the low-temperature section (411) by passing through the first heat-conducting section (421).

[0067] Since water with a lower temperature is placed at the bottom of the cold water tank (1) due to natural convection, the temperature difference at the thermoelectric element pad can be maximized by passing the water with a lower temperature through the first heat conducting portion (421).

[0068] At this time, it is preferable that the first-second convection pipe (512) be formed integrally with the first heat-conducting portion (421) or be formed of a metal material with high thermal conductivity and be in close contact with the first heat-conducting portion (421).

[0069] The water passing through the 1-2 convection pipe (512) is merged again and returned to the cold water tank (1) through the 1-3 convection pipe (513).

[0070] The above second convection pipe (52) is: the water discharged through the 2-1 convection pipe (521), which is a single pipe extending downward from the top of the hot water tank (2); flows into the 2-2 convection pipe (522) which is divided into m (the number of rows of the grid) and consists of m horizontal pipes, and heats the high temperature section (412) by passing through the second heat conducting section (422).

[0071] Since water with a higher temperature is placed at the top of the hot water tank (2) by natural convection, the temperature difference at the thermoelectric element pad can be maximized by passing the water with a higher temperature through the second heat conducting portion (422).

[0072] At this time, it is preferable that the 2-2 convection pipe (522) be formed integrally with the 2nd heat-conducting part (422) or be formed of a metal material with high thermal conductivity and be in close contact with the 2nd heat-conducting part (422).

[0073] The water passing through the 2-2 convection pipe (522) is merged again and returned to the hot water tank (2) through the 2-3 convection pipe (523).

[0074] In addition, it may include a voltage measuring unit that measures the voltage of each of the thermoelectric element pads; and a control unit that is connected to the voltage measuring unit and monitors the thermoelectric element unit (4).

[0075] The amount of power generated can be calculated by measuring the voltage in the above voltage measuring unit and measuring the current flowing in the thermoelectric element circuit.

[0076] The control unit may be controlled according to a control method including: a step of measuring the voltage of each thermoelectric element pad corresponding to a unique number assigned to each thermoelectric element pad; a step of verifying a failure by column of the thermoelectric element pad; a step of verifying a failure by row of the thermoelectric element pad; a step of verifying a failure for the thermoelectric element pad based on adjacent thermoelectric element pads; a step of monitoring the amount of power generated from the entire thermoelectric element pad; and a step of controlling the graphene-coated ceramic heating element (5) and the first to fourth pumps based on the amount of power generated.

[0077] The unique number of each thermoelectric element pad can store information about where the thermoelectric element pad is placed (coordinates) in the grid form (m X n matrix).

[0078] For example, among 300 thermoelectric element pads arranged in a grid shape of 20 X 15 size, the thermoelectric element pads arranged in 3 rows and 10 columns may have a unique number of '0310' (the first two digits indicate the row position, and the last two digits indicate the column position).

[0079] The step of verifying a failure by column of the thermoelectric element pads includes: a first column verification step of designating 1-1 thermoelectric element pads arranged in the same column among the thermoelectric element pads arranged in a grid shape based on the unique number; a second column verification step of calculating a 1-1 ratio by comparing a sum of voltages of the 1-1 thermoelectric element pads with a sum of voltages of the 1-2 thermoelectric element pads when there are 1-2 thermoelectric element pads arranged to the left of the 1-1 thermoelectric element pads with respect to the 1-1 thermoelectric element pads; a third column verification step of calculating a 1-2 ratio by comparing a sum of voltages of the 1-1 thermoelectric element pads with a sum of voltages of the 1-3 thermoelectric element pads when there are 1-3 thermoelectric element pads arranged to the right of the 1-1 thermoelectric element pads with respect to the 1-1 thermoelectric element pads; If each of the 1-1 ratio and the 1-2 ratio exceeds the previously designated 1-1 reference ratio and the 1-2 reference ratio, it may include: a fourth column verification step of recording the unique numbers of the 1-1 thermoelectric element pads as targets for defect verification; and a first repetition step of repeating the first to fourth column verification steps for columns of all thermoelectric element pad grids based on the unique numbers.

[0080] In the first thermal verification step, the thermal element pads are grouped by column based on the unique numbers of the thermal element pads.

[0081] For example, among 300 thermoelectric element pads arranged in a grid shape of 20 X 15 size, 20 thermoelectric element pads arranged in 1 row are designated (grouped) as 1-1 thermoelectric element pads.

[0082] Afterwards, if there is a thermoelectric element pad on the left side of each of the 1-1 thermoelectric element pads, these are designated as the 1-2 thermoelectric element pads, and the second thermal verification step is performed.

[0083] If there are no 1-2 thermoelectric element pads, the 2nd thermal verification step is skipped.

[0084] In the second thermal verification step, the 'sum of the voltages of the 1-1 thermoelectric element pads' and the 'sum of the voltages of the 1-2 thermoelectric element pads' are compared to calculate the 1-1 ratio.

[0085] For example, by comparing the voltage sum of three columns with the voltage sum of two columns, the difference in voltage between each column can be calculated using the 1-1 ratio.

[0086] Afterwards, if there is a thermoelectric element pad on the right side of each of the 1-1 thermoelectric element pads, these are designated as 1-3 thermoelectric element pads, and the 3rd thermal verification step is performed.

[0087] If there are no 1-3 thermoelectric element pads, skip the 3rd thermal verification step.

[0088] In the third thermal verification step, the 'sum of the voltages of the 1-1 thermoelectric element pads' and the 'sum of the voltages of the 1-3 thermoelectric element pads' are compared to calculate the 1-2 ratio.

[0089] For example, by comparing the voltage sum of the 3rd column with the voltage sum of the 4th column, the difference in voltage between each column can be calculated using the 1-2 ratio.

[0090] If both the 1-1 ratio and the 1-2 ratio are calculated and the 1-1 ratio and the 1-2 ratio each exceed the 1-1 reference ratio and the 1-2 reference ratio, that is, if the 1-1 ratio exceeds the 1-1 reference ratio and the 1-2 ratio exceeds the 1-2 reference ratio, the column in question is a column with a large difference in voltage compared to both the left column and the right column, and thus can be judged to be abnormal.

[0091] In the 4th column verification step, the 1-1 thermoelectric element pads of the corresponding column are recorded as targets for defect verification.

[0092] Afterwards, the first iteration step is performed to extract / record the defective verification targets so that the above-described steps can be performed for all columns.

[0093] The step of verifying a failure by row of the thermoelectric element pads includes: a first row verification step of designating 2-1 thermoelectric element pads arranged in the same row among the thermoelectric element pads arranged in a grid shape based on the unique number; a second row verification step of calculating a 2-1 ratio by comparing a sum of voltages of the 2-1 thermoelectric element pads with a sum of voltages of the 2-2 thermoelectric element pads when there are 2-2 thermoelectric element pads arranged on top of the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads; a third row verification step of calculating a 2-2 ratio by comparing a sum of voltages of the 2-1 thermoelectric element pads with a sum of voltages of the 2-3 thermoelectric element pads when there are 2-3 thermoelectric element pads arranged on bottoms of the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads; If each of the 2-1 ratio and the 2-2 ratio exceeds the previously designated 2-1 reference ratio and the 2-2 reference ratio, it may include: a fourth row verification step of recording the unique numbers of the 2-1 thermoelectric element pads as targets for defect verification; and a second repetition step of repeating the first row verification step to the fourth row verification step for rows of all thermoelectric element pad grids based on the unique numbers.

[0094] The step of verifying a failure by row of the above thermoelectric element pads can be performed in the same manner by referring to the specific descriptions of the step of verifying a failure by column of the above thermoelectric element pads (by switching the column / row in the description section).

[0095] The steps for verifying a failure of the thermoelectric element pads include: a first adjacent verification step of recording, based on the unique number, the thermoelectric element pads arranged at the outermost end among the thermoelectric element pads arranged in a grid shape as targets for failure verification; a second adjacent verification step of designating, based on the unique number, the 3-1 thermoelectric element pad (41-1) as one of the thermoelectric element pads recorded as targets for failure verification; a third adjacent verification step of calculating a 3-1 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) and the voltage of the 3-2 thermoelectric element pad (41-2) when a 3-2 thermoelectric element pad (41-2) arranged on the 3-1 thermoelectric element pad (41-1) exists; In the case where there is a 3-3 thermoelectric element pad (41-3) disposed below the 3-1 thermoelectric element pad (41-1) with respect to the 3-1 thermoelectric element pad (41-1): a fourth adjacent verification step of calculating the 3-2 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) with the voltage of the 3-3 thermoelectric element pad (41-3); In the case where there is a 3-4 thermoelectric element pad (41-4) disposed on the left side of the 3-1 thermoelectric element pad (41-1) with respect to the 3-1 thermoelectric element pad (41-1): a fifth adjacent verification step of calculating the 3-3 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) with the voltage of the 3-4 thermoelectric element pad (41-4); In the case where the 3-5 thermoelectric element pad (41-5) is located on the right side of the 3-1 thermoelectric element pad (41-1) with respect to the 3-1 thermoelectric element pad (41-1): a 6th adjacent verification step of calculating the 3-4 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) and the voltage of the 3-5 thermoelectric element pad (41-5);If all of the values ​​calculated among the 3-1 to 3-4 ratios exceed the previously designated 3-1 to 3-4 reference rates: a 7th adjacent verification step of recording the unique number of the 3-1 thermoelectric element pad (41-1) as defective; and a 3rd repetition step of repeating the 1st adjacent verification step to the 7th adjacent verification step for all the thermoelectric element pads based on the unique number;

[0096] In the above first adjacent verification step, all outermost rows / columns that were not recorded as defective verification targets in the above-described steps are designated as defective verification targets.

[0097] For example, among 300 thermoelectric element pads arranged in a grid shape of 20 X 15 size, thermoelectric element pads included in the 1st column, 15th column, 1st row, and 20th row are designated as defect verification targets.

[0098] In the second adjacent verification step, one of the defective verification target lists is extracted and designated as the 3-1 thermoelectric element pad (41-1).

[0099] Thereafter, if another thermoelectric element pad is located on the upper side of the 3-1 thermoelectric element pad (41-1), it is designated as the 3-2 thermoelectric element pad (41-2), if another thermoelectric element pad is located on the lower side of the 3-1 thermoelectric element pad (41-1), it is designated as the 3-3 thermoelectric element pad (41-3), if another thermoelectric element pad is located on the left side of the 3-1 thermoelectric element pad (41-1), it is designated as the 3-4 thermoelectric element pad (41-4), and if another thermoelectric element pad is located on the right side of the 3-1 thermoelectric element pad (41-1), it is designated as the 3-5 thermoelectric element pad (41-5).

[0100] In case the 3-2 thermoelectric element pad (41-2) exists: a third adjacent verification step is performed to calculate the 3-1 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) and the voltage of the 3-2 thermoelectric element pad (41-2).

[0101] In case the 3-3 thermoelectric element pad (41-3) exists: a 4th adjacent verification step is performed to compare the voltage of the 3-1 thermoelectric element pad (41-1) and the voltage of the 3-3 thermoelectric element pad (41-3) to calculate the 3-2 ratio.

[0102] In case the 3-4th thermoelectric element pad (41-4) exists: a fifth adjacent verification step is performed to calculate the 3-3 ratio by comparing the voltage of the 3-1st thermoelectric element pad (41-1) and the voltage of the 3-4th thermoelectric element pad (41-4).

[0103] In case the 3-5 thermoelectric element pad (41-5) exists: a 6th adjacent verification step is performed to calculate the 3-4 ratio by comparing the voltage of the 3-1 thermoelectric element pad (41-1) and the voltage of the 3-5 thermoelectric element pad (41-5).

[0104] At this time, if the thermoelectric element pad placed at the outermost end is designated as the 3-1 thermoelectric element pad (41-1), at least one of the 3-1 to 3-4 ratios, or at most two, may not be produced.

[0105] Regardless of whether some of the 3-1 ratio or the 3-4 ratio is calculated, if all of the calculated values ​​exceed the previously specified 3-1 reference ratio or the 3-4 reference ratio, the 3-1 thermoelectric element pad (41-1) can be judged as defective.

[0106] For example, if the thermoelectric element pad arranged in the 3rd column of the 1st row was designated as the 3rd thermoelectric element pad (41-1), and the 3rd-1 ratio was not calculated and the 3rd-2 ratio to the 3rd-4 ratio exceeded the 3rd-2 reference ratio to the 3rd-4 reference ratio, respectively, then the thermoelectric element pad arranged in the 3rd column of the 1st row may be judged to be defective.

[0107] In the third iteration step, the adjacent verification steps are performed once for each thermoelectric element pad included in the defective verification target list.

[0108] In addition, the cold water tank (1) and hot water tank (2) are each equipped with a temperature sensor, so that the temperature of the cold water and hot water can be measured / monitored.

[0109] The steps of controlling the ceramic heating element (5) coated with graphene and the first to fourth pumps include: when the amount of power generation measured from the entire thermoelectric element pad is less than a first reference: adjusting the set temperature of the ceramic heating element (5) coated with graphene to a first temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the first reference and less than a second reference: adjusting the set temperature of the ceramic heating element (5) coated with graphene to a second temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the second reference and less than a third reference: adjusting the set temperature of the ceramic heating element (5) coated with graphene to a third temperature; when the amount of power generation measured from the entire thermoelectric element pad is greater than or equal to the third reference: adjusting the set temperature of the ceramic heating element (5) coated with graphene to a fourth temperature; The method may include: when the operating times of the third pump and the fourth pump are less than the fourth standard: adjusting the output of the third pump and the fourth pump to the first RPM; when the operating times of the third pump and the fourth pump are greater than or equal to the fourth standard: adjusting the output of the third pump and the fourth pump to the second RPM; when the water temperature inside the cold water tank (1) is less than the fifth standard: adjusting the output of the first pump to the third RPM; when the water temperature inside the cold water tank (1) is greater than or equal to the fifth standard: adjusting the output of the first pump to the fourth RPM; when the water temperature inside the hot water tank (2) is less than the sixth standard: adjusting the output of the second pump to the fifth RPM; and when the water temperature inside the hot water tank (2) is greater than or equal to the sixth standard: adjusting the output of the second pump to the sixth RPM.

[0110] When the power generation measured from the entire thermoelectric element pad is less than the first reference: In the step of adjusting the set temperature of the ceramic heating element (5) coated with graphene to the first temperature, when the total power generation is less than the first reference (lowest reference value), the set temperature of the ceramic heating element (5) coated with graphene is adjusted to the first temperature (maximum set temperature), thereby maximizing the temperature difference between cold water and hot water.

[0111] Numerically, it is designated as '1st standard < 2nd standard < 3rd standard', and the 3rd standard is the minimum power generation when the system operates normally.

[0112] Accordingly, 'first temperature > second temperature > third temperature > fourth temperature', and the fourth temperature is the set temperature of the ceramic heating element (5) coated with graphene when the system is operating normally and in a steady state.

[0113] As described above, if the power generation is insufficient, the temperature of the hot water can be increased by raising the set temperature of the graphene-coated ceramic heating element (5), thereby increasing the temperature difference between the hot water and the cold water, and thus increasing the power generation.

[0114] When the operating time of the third pump and the fourth pump is less than the fourth standard: In the step of adjusting the output of the third pump and the fourth pump to the first RPM; since the temperature of the cold water and hot water is not transferred to the low-temperature part (411) and the high-temperature part (412) of the thermoelectric element pad shortly after the system starts operating, the third pump and the fourth pump are operated at a high output to adjust the temperature of the low-temperature part (411) and the high-temperature part (412) of the thermoelectric element pad.

[0115] Numerically, '1st RPM > 2nd RPM', and the 2nd RPM is the output of the 3rd and 4th pumps in steady state.

[0116] When the water temperature inside the cold water tank (1) is below the fifth standard: In the step of adjusting the output of the first pump to the third RPM, when the water temperature (cold water temperature) inside the cold water tank (1) is below the specified value, the first pump is operated at the third RPM because it is operating normally.

[0117] Numerically, '3rd RPM < 4th RPM', and 3rd RPM is the first pump output in steady state.

[0118] When the water temperature inside the hot water tank (2) is lower than the sixth standard: In the step of adjusting the output of the second pump to the fifth RPM, when the water temperature (hot water temperature) inside the hot water tank (2) is lower than a specified value, the second pump is operated at the fifth RPM because the temperature of the hot water is lower than the specified value.

[0119] Numerically, '5th RPM > 6th RPM', and 6th RPM is the second pump output in steady state.

[0120] Although the embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be implemented without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain it, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all aspects and not restrictive. The protection scope of the present invention should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0121] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. A cold water tank that holds water inside; A hot water tank that holds water inside; A heat pump that transfers heat from the cold water tank to the hot water tank; A thermoelectric element that generates electricity based on the temperature difference between the water contained in the cold water tank and the hot water tank; A graphene-coated ceramic heating element that heats water contained in the above hot water tank; and Includes an ESS (Energy Storage System) that stores the power produced in the above thermoelectric element; The above heat pump: A compressor that compresses refrigerant; A first heat exchanger connected to the compressor and transferring heat between water supplied from the cold water tank and the refrigerant; A first water pipe supplying water from the cold water tank to the first heat exchanger; A second water pipe that supplies water that has passed through the first heat exchanger to the cold water tank; A first pump connected to one side of the first or second water pipe; A second heat exchanger connected to the compressor and transferring heat between water supplied from the hot water tank and the refrigerant; A third water pipe supplying water from the above hot water tank to the above second heat exchanger; A fourth water pipe that supplies water passing through the second heat exchanger to the ceramic heating element coated with graphene; A fifth water pipe supplying water passing through the ceramic heating element coated with the graphene to the hot water tank; and A second pump connected to one side of the third, fourth or fifth water pipe; The above thermoelectric element: A thermoelectric element pad having a low-temperature part on one side and a high-temperature part on the other side; A first heat-conducting portion attached to the above low-temperature portion; A second heat-conducting portion attached to the above high-temperature portion; A first convection pipe that receives water from the lower part of the cold water tank, passes through the first heat conducting section, and discharges the water to the upper part of the cold water tank; A second convection pipe that supplies water from the upper part of the hot water tank, passes through the second heat-conducting part, and discharges the water to the lower part of the hot water tank; a third pump connected to the first convection pipe; and including a fourth pump connected to the second convection pipe; The above thermoelectric element pad: A plurality of them are arranged in a grid shape of a predetermined size of m X n (m, n: natural numbers), The above first convection pipe: A first-first convection pipe extending upward from the bottom of the above cold water tank; A 1-2 convection pipe branched m times from the end of the 1-1 convection pipe, each branched pipe being arranged horizontally to correspond to one row of the thermoelectric element pad, and passing through the 1-1 convection pipe; and A first-third convection pipe is extended from the ends of a plurality of the first-second convection pipes and connected to the upper portion of the cold water tank; The above second convection pipe: A 2-1 convection pipe extending downward from the top of the above hot water tank; A 2-2 convection pipe branched m times from the end of the 2-1 convection pipe, each branched pipe being arranged horizontally to correspond to one row of the thermoelectric element pad, and passing through the 2nd heat-conducting section; and A second-third convection pipe is extended from the end of a plurality of the second-second convection pipes and connected to the lower part of the hot water tank; A voltage measuring unit for measuring the voltage of each of the above thermoelectric element pads; and A control unit connected to the voltage measurement unit and monitoring the thermoelectric element unit; The above control unit: A step of measuring the voltage of each thermoelectric element pad corresponding to a unique number assigned to each thermoelectric element pad; Step for verifying failures by column of thermoelectric element pads; Step of verifying failures by row of thermoelectric element pads; A step of verifying a failure of a thermoelectric element pad based on adjacent thermoelectric element pads; A step of monitoring the amount of power generated from the entire thermoelectric element pad; and Based on the above power generation, it is controlled according to a control method including a step of controlling a ceramic heating element coated with graphene and a first to fourth pumps; The steps for verifying failures by column of the above thermoelectric element pads are: A first column verification step of designating the 1-1 thermoelectric element pads arranged in the same column among the thermoelectric element pads arranged in a grid shape based on the above-mentioned unique number; In the case where there are 1-2 thermoelectric element pads arranged to the left of the 1-1 thermoelectric element pads for the 1-1 thermoelectric element pads: a second thermal verification step of calculating the 1-1 ratio by comparing the sum of the voltages of the 1-1 thermoelectric element pads with the sum of the voltages of the 1-2 thermoelectric element pads; In the case where there are 1-3 thermoelectric element pads arranged to the right of the 1-1 thermoelectric element pads for the 1-1 thermoelectric element pads: a third thermal verification step of calculating the 1-2 ratio by comparing the sum of the voltages of the 1-1 thermoelectric element pads with the sum of the voltages of the 1-3 thermoelectric element pads; If the above 1-1 ratio and the 1-2 ratio each exceed the previously specified 1-1 reference ratio and the 1-2 reference ratio: a 4th thermal verification step of recording the unique numbers of the 1-1 thermoelectric element pads as a target for defect verification; and A first repetition step of repeating the first to fourth column verification steps for all columns of the thermoelectric element pad grid based on the above-mentioned unique number; The steps for verifying the failure of each row of the above thermoelectric element pads are: A first row verification step for designating the 2-1 thermoelectric element pads arranged in the same row among the thermoelectric element pads arranged in a grid shape based on the above-mentioned unique number; In the case where there are 2-2 thermoelectric element pads positioned on top of the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads: a second row verification step of calculating the 2-1 ratio by comparing the sum of the voltages of the 2-1 thermoelectric element pads with the sum of the voltages of the 2-2 thermoelectric element pads; In the case where there are 2-3 thermoelectric element pads positioned below the 2-1 thermoelectric element pads for the 2-1 thermoelectric element pads: a third row verification step of calculating the 2-2 ratio by comparing the sum of the voltages of the 2-1 thermoelectric element pads with the sum of the voltages of the 2-3 thermoelectric element pads; If the above 2-1 ratio and the 2-2 ratio each exceed the previously specified 2-1 reference ratio and the 2-2 reference ratio: a 4th row verification step of recording the unique numbers of the 2-1 thermoelectric element pads as a target for defect verification; and A second iteration step of repeating the first row verification step to the fourth row verification step for all rows of the thermoelectric element pad grid based on the unique number; The steps for verifying the failure of the above thermoelectric element pad are: A first adjacent verification step of recording the outermost thermoelectric element pads among the thermoelectric element pads arranged in a grid shape based on the above-mentioned unique number as a target for defect verification; A second adjacent verification step of designating a 3-1 thermoelectric element pad, which is one of the thermoelectric element pads recorded as the defective verification target, based on the above-mentioned unique number; In the case where a 3-2 thermoelectric element pad is positioned on top of the 3-1 thermoelectric element pad for the 3-1 thermoelectric element pad: a third adjacent verification step of calculating a 3-1 ratio by comparing the voltage of the 3-1 thermoelectric element pad and the voltage of the 3-2 thermoelectric element pad; In the case where a 3-3 thermoelectric element pad is located below the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a fourth adjacent verification step of calculating a 3-2 ratio by comparing the voltage of the 3-1 thermoelectric element pad and the voltage of the 3-3 thermoelectric element pad; In the case where there is a 3-4 thermoelectric element pad located to the left of the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a fifth adjacent verification step of calculating the 3-3 ratio by comparing the voltage of the 3-1 thermoelectric element pad and the voltage of the 3-4 thermoelectric element pad; In the case where there is a 3-5 thermoelectric element pad located to the right of the 3-1 thermoelectric element pad with respect to the 3-1 thermoelectric element pad: a 6th adjacent verification step of calculating the 3-4 ratio by comparing the voltage of the 3-1 thermoelectric element pad and the voltage of the 3-5 thermoelectric element pad; If all of the values ​​calculated among the above 3-1 to 3-4 ratios exceed the previously designated 3-1 to 3-4 reference rates: a 7th adjacent verification step of recording the unique number of the 3-1 thermoelectric element pad as defective; and A third repetition step of repeating the first adjacent verification step to the seventh adjacent verification step for all the thermoelectric element pads based on the unique number; The above cold water tank and hot water tank are each equipped with a temperature sensor, The steps of controlling the ceramic heating element coated with the graphene and the first to fourth pumps are: When the power generation measured from the entire thermoelectric element pad is less than the first standard: a step of adjusting the set temperature of the ceramic heating element to which the graphene is applied to the first temperature; When the power generation measured from the entire thermoelectric element pad is greater than or equal to the first standard and less than the second standard: a step of adjusting the set temperature of the ceramic heating element to which the graphene is applied to the second temperature; When the power generation measured from the entire thermoelectric element pad is greater than or equal to the second standard and less than the third standard: a step of adjusting the set temperature of the ceramic heating element to which the graphene is applied to the third temperature; When the power generation measured from the entire thermoelectric element pad is greater than or equal to the third standard: a step of adjusting the set temperature of the ceramic heating element to which the graphene is applied to a fourth temperature; When the operating time of the third pump and the fourth pump is less than the fourth standard: a step of adjusting the output of the third pump and the fourth pump to the first RPM; When the operating time of the third pump and the fourth pump is greater than or equal to the fourth standard: a step of adjusting the output of the third pump and the fourth pump to the second RPM; When the water temperature inside the cold water tank is below the fifth standard: a step of adjusting the output of the first pump to the third RPM; When the water temperature inside the cold water tank is higher than the fifth standard: a step of adjusting the output of the first pump to the fourth RPM; When the water temperature inside the hot water tank is below the sixth standard: a step of adjusting the output of the second pump to the fifth RPM; and Including: a step of adjusting the output of the second pump to the sixth RPM when the water temperature inside the hot water tank is higher than the sixth standard; A hot and cold water supply and power generation system comprising a graphene-coated ceramic heating element.

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