WO2015174698A1

WO2015174698A1 - Heating value measurement apparatus and heating value measurement method

Info

Publication number: WO2015174698A1
Application number: PCT/KR2015/004668
Authority: WO
Inventors: 윤병동; 김태진; 김현재
Original assignee: 서울대학교 산학협력단
Priority date: 2014-05-14
Filing date: 2015-05-11
Publication date: 2015-11-19
Also published as: KR101596794B1; KR20150130782A

Abstract

The present invention provides a heating value measurement apparatus comprising: a measurement unit including at least one thermoelement, the measurement unit being installed on a heat generating element so as to be thermally conductible; an insulating case which is configured to enclose a region, except one side of the heat generating element that is in contact with the thermoelement, so that the heat generated from the heat generating element can be completely transmitted to the outside after passing through the thermoelement; and a control calculation unit which controls the temperature of the heat generating element to the preset temperature conditions by applying a predetermined amount of power to the thermoelement and lowering the temperature of the thermoelement, and which calculates the total amount of power used in the temperature control of the heat generating element. Provided is also a heating value measurement method comprising: a step in which the heat generating element is prepared in the heating value measurement apparatus; a step in which heat is generated in the heat generating element, resulting in a temperature change of the heat generating element; a step in which the heat generated from the heat generating element is transmitted to a heat transmission unit after passing through the thermoelement; a step in which the measurement unit monitors the temperature of the thermoelement and then transmits temperature data to the control calculation unit; and a step in which the control calculation unit calculates power to be applied to the thermoelement in order to control the temperature of the heat generating element to the preset temperature conditions, and calculates a heating value of the heat generating element by applying power to the thermoelement through a power supply device and then measuring the total amount of applied power.

Description

Calorific value measuring device and calorific value measuring method

The present invention relates to a calorific value measuring device and a calorific value measuring method of an object generating heat, and more particularly, to a calorific value measuring device and a calorific value measuring method of a heating element having a small and medium size, such as a lithium ion battery or a semiconductor chip for an electric vehicle. .

Due to the high performance and high integration of lighting devices, mobile devices, and computers using lithium-ion batteries, LEDs and semiconductor devices for electric vehicles, the temperature of components and devices rises due to heat generated in the devices, resulting in deterioration of the functions and reliability of the devices. Problems, such as shortening the lifespan.

As part of efforts to maximize heat dissipation within a given area or space, efforts are being made to develop superior heating materials and design devices. Therefore, although it is very important industrially to evaluate the heating characteristics of the heating material and the device, there is a lack of a measuring method and apparatus capable of efficiently evaluating the heating characteristics at present.

Even the same heat generating material or heat generating package shows very opposite characteristics depending on the measuring device used and the measuring conditions. Currently, the method of evaluating the heating characteristics is largely measured by measuring the thermal conductivity of the material, and by measuring the thermal resistance at each junction interface in a light emitting diode (LED) or a semiconductor package (thermal resistance). There is this. In practice, in evaluating the heating ability of heating materials and various packages in an industrial or laboratory, it is difficult to evaluate the reliability of the results obtained because different data are displayed depending on the measuring device and the measurement conditions.

In addition, in the existing heat generation measuring device, a relatively long time is required to measure heat generation, and most of the devices are suitable for measuring a high heat generation amount. Therefore, it is not suitable for measuring the calorific value which varies in small or medium size or short time units.

The technical problem of the present invention was conceived in this respect, and an object of the present invention is to provide an apparatus for measuring a calorific value of a heating element having a small and medium size and a calorific value measuring method using advantages such as fast response characteristics and thermoelectric reliability of a thermoelectric element. It is done. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

According to an aspect of the invention, the measurement unit having at least one thermoelectric element installed on the target heating element to enable thermal conductivity; An insulating case surrounding a region excluding one side of the target heating element in contact with the thermoelectric element such that the heat generated from the target heating element is transferred to the outside through the thermoelectric element; And a control calculator configured to apply a predetermined power to the thermoelectric element to lower the temperature of the thermoelectric element to control the temperature of the target heating element to a predetermined temperature condition, and calculate the total amount of power used for temperature control of the target heating element. It may include.

And a heat transfer part disposed to be in direct contact with the thermoelectric element such that heat generated from the target heating element is transferred through the thermoelectric element.

The calorific value of the target heating element is calculated by the following equation 1 in the control operation unit, calorific value measuring apparatus.

[Equation 1]

Here, the Q _pump is the calorific value of the target heating element, k ₁ , k ₂ , k ₃ is the model coefficient, I is the current consumed by the thermoelectric element, T _cool is the thermoelectric element and Contact surface temperature between the heat transfer part, and T _hot is the contact surface temperature between the thermoelectric element and the target heating element)

The thermoelectric elements may be disposed in contact with each other without being spaced apart from each other.

The heat transfer part may be disposed to be in direct contact with the thermoelectric element, and may include a heat dissipation structure including at least one of a heat pad, a heat grease, and a heat sink.

The heat transfer part may be further disposed on the heat dissipation structure and further include a cooling device including at least one of a cooling fin or a cooling fan.

The heat transfer part may be disposed to be in direct contact with the thermoelectric element, and may include a cooling device including at least one of a cooling pin or a cooling fan.

The target heating element may include one of structures that may be in contact with the thermoelectric element to enable thermal conductivity.

According to another aspect of the invention, the calorific value measuring method comprises the steps of preparing the target heating element in the calorific value measuring device; Generating heat from the target heating element to change the temperature of the target heating element; Transferring heat generated from the target heating element to the heat transfer part via the thermoelectric element; Monitoring temperature of the thermoelectric element in the measurement unit and transmitting temperature data to the control operation unit; And calculating, by the control operator, power to be applied to the thermoelectric element to control the temperature of the target heating element to a predetermined temperature condition, applying power to the thermoelectric element through a power supply, and measuring the total amount of power applied. And calculating the amount of heat generated by the target heating element.

According to an embodiment of the present invention made as described above, there is provided a calorific value measuring device and a calorific value measuring method. The calorific value of lithium ion batteries and semiconductor chips for electric vehicles can be measured more accurately and quickly by using the characteristic formula of thermoelectric elements.

In addition, there is no need to add a separate configuration, the structure is simple, and the economic effect can be obtained with a relatively low production cost. Of course, the scope of the present invention is not limited by these effects.

1 is a process flowchart schematically illustrating a calorific value measuring method using a calorific value measuring apparatus according to an embodiment of the present invention.

2 is a configuration diagram illustrating a configuration of a calorific value measuring device according to an embodiment of the present invention.

3 is a cross-sectional view schematically showing a calorific value measuring device according to an embodiment of the present invention.

4 is a cross-sectional view schematically showing a calorific value measuring device according to another embodiment of the present invention.

5 is a perspective view schematically showing the components of the calorific value measuring device according to an embodiment of the present invention.

FIG. 6 is a perspective view schematically illustrating a calorific value measuring apparatus incorporating components of the calorific value measuring apparatus of FIG. 5.

7 is a photograph showing a calorific value measuring apparatus according to an embodiment of the present invention.

8A to 8C are diagrams showing a calorific value measurement data result according to an experimental example of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, and the following embodiments are intended to complete the disclosure of the present invention, the scope of the invention to those skilled in the art It is provided to inform you completely. In addition, the components may be exaggerated or reduced in size in the drawings for convenience of description.

Referring to Figure 1, the calorific value measuring method according to an embodiment of the present invention is as follows. Preparing the target heating element in the calorific value measuring device (S10), the step of generating heat in the target heating element to change the temperature of the target heating element (S20), the heat generated from the target heating element is transferred to the heat transfer unit through the thermoelectric element. Step (S30), the measuring unit monitors the temperature of the thermoelectric element, and transmitting the temperature data of the thermoelectric element to the control operation unit (S40) and the control operation unit calculates the power to be applied to the thermoelectric element and then the power to the thermoelectric element It may include the step of calculating the amount of heat of the target heating element by applying (S50).

Detailed description of each step of the calorific value measuring method of the target heating element will be described later with reference to FIGS. 2 to 6 showing the configuration of the calorific value measuring apparatus.

Referring to FIG. 2, the solid line of FIG. 2 illustrates the flow of electrical signals, and the dotted line of FIG. 2 illustrates the heat flow. The calorific value measuring device 1 may be largely comprised of the measuring unit 10 and the control operation unit 20. First, referring to the measuring unit 10, for example, the temperature of the target heating element 12, the thermoelectric element 14 and the thermoelectric element 14 in direct contact with the target heating element 12, to which the heat generation amount should be measured, may be monitored. It may include a heat conduction unit 15 to prevent overheating of the temperature sensor 18 and the thermoelectric element 14 and to improve the thermal conductivity.

In addition, the temperature sensor 18 may be installed on any one of the upper or lower portion of the thermoelectric element, and may be installed at a position capable of temperature sensing or may be installed at both the upper and lower portions according to the design.

The control operation unit 20 controls the power consumption and temperature consumed by the control unit 22 and the thermoelectric element 14 to control the power supply to be supplied to the thermoelectric element 14 based on the measured temperature data of the thermoelectric element 14. By using the calculation unit 24 for calculating the amount of heat generated by the target heating element 12, the DAQ module 26 and the thermoelectric element 14 for storing or processing the temperature data of the thermoelectric element 14 measured by the temperature sensor 18 It may include a power supply 28 for supplying power.

The calorific value measuring method by the configuration of the calorific value measuring device 1 shown in FIG. 2 will be described in detail as follows. First, the target heating element 12 is positioned in the measuring unit 10 of the calorific value measuring device 1. The target heating element 12 may include one of structures that may be in thermal contact with the thermoelectric element, and may include, for example, one of a lithium ion battery or a semiconductor chip for an electric vehicle.

When the target heating element 12 starts to generate heat in the sealed measuring unit 10, heat may be conducted to the thermoelectric element 14 provided with thermal conductivity in the target heating element 12. The heat may increase the temperature of the lower surface of the thermoelectric element 14, and the upper surface of the thermoelectric element 14 may be relatively low. In order to prevent the thermoelectric element 14 from being overheated, the thermoelectric element 15 may be disposed to be in contact with the thermoelectric element 15. The thermal conductivity of the thermoelectric element 14 may be increased to detect a temperature change more quickly, and the amount of heat generated by the target heating element 12. Helps to compute

At this time, the temperature sensor 18 may monitor the temperature of the upper or lower portion of the thermoelectric element 14. The temperature sensor 18 may use resistance temperature detectors, for example. Resistive temperature sensors are sensors used to measure temperature with the resistance of a device, and most resistive temperature sensors are constructed with a ceramic or glass core. The resistive element is generally very unstable, so cover it with a cover to protect it.

In addition, the resistive temperature sensor is relatively accurate compared to other temperature sensors, has excellent stability and repeatability, and is not affected by electrical noise, making it suitable for use in places requiring precise temperature measurement.

Temperature data of the thermoelectric element 14 measured by the temperature sensor 18 is stored and processed in the DAQ module 26. The temperature data accumulated in the DAQ module 26 is transferred to the control unit 22 and the calculation unit 24 to help the process proceed.

First, in order to control the temperature of the target heating element 12 to a predetermined temperature condition, the calculation unit 24 calculates the amount of power to be applied to the thermoelectric element 14 based on the temperature data transmitted to the controller 22. The controller 22 may apply power to the thermoelectric element 14 through the power supply device 28 by the calculated amount of power.

The temperature of the thermoelectric element 14 may be lowered by the applied power, and heat may move according to the amount of power consumed. Therefore, the constant temperature state of the target heating element 12 may be maintained, and heat generated continuously from the target heating element 12 may be transferred to the outside along the thermoelectric element 14.

At the same time, the calculation unit 24 may calculate the total amount of power consumed by the thermoelectric element 14 to calculate the amount of heat generated by the target heating element 12. By repeating this series of steps several times, the calorific value of the target heating element 12 can be accurately measured. The amount of heat generated by the target heating element 12 calculated by the calculation unit 24 may be calculated by Equation 1 below.

[Equation 1]

Here, Q _pump is the calorific value of the target heating element 12, k ₁ , k ₂ , k ₃ is the model coefficient, I is the current consumed by the thermoelectric element 14, and T _cool is the thermoelectric element 14. ) Is the temperature of the contact surface between the heat conduction portion 15, and T _hot is the temperature of the contact surface of the thermoelectric element 14 and the target heating element 12)

Equation 1 is a heating formula of the thermoelectric element 14. In the case of the first term k ₁ I _TEM on the right side in Equation 1, Equation 1 is a value representing cooling performance of the thermoelectric element 14, and a second term k on the right side. _In the case of ₂ I ² _TEM , the value represents the self-heating of the thermoelectric element 14, and finally, in the case of the third term k ₃ (T _cool -T _hot ) on the right side, it is a value due to natural convection.

Here, if the model coefficients k ₁ , k ₂ , and k ₃ are obtained through calibration, the target element is used by using the current value consumed when the thermoelectric element 14 constantly controls the temperature of the target heating element 12. The calorific value of the heating element 12 can be calculated inversely. The method of obtaining the model coefficient will be described later with reference to FIGS. 8A to 8C.

2 and 3, the calorific value measuring apparatus according to an embodiment of the present invention may include the target heating element 12 inside the heat insulating structure 34. The thermoelectric element 14 may be disposed on the target heating element 12 to enable thermal conduction, and a temperature sensor 18 may be formed between the target heating element 12 and the thermoelectric element 14.

The heat conductive part 15 may be formed on the thermoelectric element 14, and the temperature sensor 18 may be formed between the thermoelectric element 14 and the heat conductive part 15. The heat conduction unit 15 may be largely classified into a cooling device 36 or a heat dissipation structure. The heat dissipation structure may include, for example, at least one of a thermal pad, a thermal grease, and a heat sink. In addition, the cooling device 36 may include at least one of a cooling pin or a cooling fan. The heat conduction unit 15 may include one of a cooling device or a heat dissipation structure, but by connecting a plurality of the cooling devices or the heat dissipation structure, the thermal conductivity may be further improved to cool the thermo element 14 more rapidly.

For example, a heat dissipation structure having at least one of a thermal pad, a thermal grease, and a heat sink on the thermoelectric element 14 is disposed to be in direct contact or a thermoelectric element ( The cooling device having at least one of a cooling fin or a cooling fan may be arranged to be in direct contact therewith. In addition, the heat dissipation structure is disposed on the thermoelectric element 14 to be in direct contact, and may further include a cooling device including at least one of a cooling pin or a cooling fan. In all three cases, the thermoelectric element 14 may be prevented from being excessively overheated and damaged. When both the heat dissipation structure and the cooling device are configured, the thermal conductivity of the calorific value measuring device is further improved to further control the temperature of the thermoelectric element 14. It can be done quickly.

In addition, the heat conduction portion 15 functions to control the region between the target heating element 12 and the heat conduction portion 15 at an appropriate temperature. Since the inside of the measuring unit 10 is not overheated by the heat conducting unit 15, it helps to measure the heat generation amount with high accuracy from the characteristic formula of the thermoelectric element 14.

The thermally conductive portion 15 may operate only when the target heating element 12 or the thermal element 14 is overheated at a predetermined temperature or more. On the contrary, when the thermal conductive portion 15 is always operated, the target heating element 12 may operate. The temperature of the target heating element 12 can be lowered before calculating the calorific value of c). In this case, the calorific value of the target heating element 12 may be compared by correcting the relative value.

2 and 4, the target heating element 12 may be positioned at the center of the calorific value measuring device 1. In this case, the thermoelectric element 14 may directly contact the upper and lower surfaces of the target heating element 12. Heat may be blocked by the heat insulating case 34 in all regions other than the region in which the thermoelectric element is in contact so that all heat generated from the target heating element 12 is transferred through the thermoelectric element 14. In addition, the heat conduction portion is disposed on the thermoelectric element 14 to be in direct contact with each other, thereby further improving the thermal conductivity transferred from the thermoelectric element.

In addition, a temperature sensor 18 may be formed between the target heating element 12 and the thermoelectric element 14, and a cable may be formed to apply electric power to the thermoelectric element 14. For example, when heat is generated in the target heating element 12, heat generated in the target heating element 12 may be transferred to the outside through the thermoelectric element 14 in the direction of the arrow of Q. When a temperature change is detected by the temperature sensor 18 in contact with the target heating element 12, temperature data is transferred to the DAQ module 26, and the temperature is transmitted from the DAQ module 26 to the controller 22 and the calculator 24, respectively. Data is passed.

After calculating the amount of power to be applied to the thermoelectric element 14 in the calculator 24, the controller 22 may apply power to the thermoelectric element 14 through the power supply device 28. The temperature of the thermoelectric element 14 is lowered by the power applied in this way, and helps to control the temperature of the target heating element 12 to a predetermined temperature condition.

The amount of power or thermoelectric applied by the power supply device 28 in the calculation unit 24 of the control operation unit 20 while the control operation unit 20 controls the temperature of the target heating element 12 to a predetermined temperature condition through a series of processes. The total amount of power consumed by the element 14 may be measured to calculate the amount of heat generated by the target heating element 12.

5 is a perspective view schematically showing the components of the calorific value measuring device according to an embodiment of the present invention. FIG. 6 is a perspective view schematically illustrating a calorific value measuring apparatus incorporating components of the calorific value measuring apparatus of FIG. 5.

5 and 6, the components of the calorific value measuring device 1 are as follows. First, a frame 30 capable of supporting the calorific value measuring device may be formed at a lower end thereof. Insulator 32 may be assembled onto the frame. The insulator 32 may serve as a secondary protection function of the heat insulation case for the purpose of blocking heat transferred from the calorific value measuring device.

The heat insulation case 34 may be coupled to the insulator 32. The heat insulation case 34 can use Teflon, for example. The structure of the heat insulation case 34 is a structure which surrounds at least one part of the target heat generating body 12. This is because the heat is transferred only to the target heating element 12 and the thermoelectric element 14 provided with thermal conductivity, so that all of the remaining regions except the region in which the thermoelectric element 14 is in contact with each other are insulated by the insulating case 34. Can be blocked.

The target heating element 12 may be positioned inside the heat insulation case 34, and at least one thermoelectric element 14 may be disposed to be in contact with each other without being spaced apart from each other on the upper portion of the target heating element 12. In addition, the thermoelectric elements 14 may be disposed in contact with each other without being spaced apart from the heat dissipation structure 16. The cooling device 36 may be disposed on the heat dissipation structure 16 to improve the cooling performance.

Referring to FIG. 6, the measurement unit 10 including the target heating element 12 and the thermoelectric element 14 as a schematic diagram of the calorific value measuring apparatus 10 in which the above-described components are all combined is sealed invisible from the outside. You can check it.

Referring to FIG. 7, as can be seen in the schematic diagram of the calorific value measuring device 1 of FIG. 6, an insulation case 34 is disposed at a lower end thereof, and a frame 30 is formed at an edge of the insulation case 34. The calorific value measuring apparatus 1 in which the cooling device 36 is formed in the upper part of the heat insulation case 34 can be seen.

Experimental Example

The battery is arranged inside the calorific value measuring device 1. The PID controller is used to control the temperature of the thermoelectric element 14. By referring to Equation 1, the difference between the current and the temperature consumed by the battery is measured, and k1, k2, and k3 model coefficients are experimentally obtained using 10 reference calorific values. The calculated power factor is compared with the estimated amount of heat consumed by the actual thermoelectric element.

At this time, assuming that all the heat generated from the battery escapes to the outside, the temperature of the battery can be constantly controlled using the thermoelectric element 14. In order to constantly control the temperature of the battery, the amount of power consumed for cooling the thermoelectric element 14 may be calculated to measure the calorific value of the battery.

Table 1

	Reference calorific value (W)	Current dissipated in thermoelectric element (A)	Temperature difference (℃)
One	0.5	0.1173	1.887
2	One	0.1805	2.233
3	1.5	0.2644	3.080
4	2	0.3507	3.996
5	2.5	0.4539	5.040
6	3	0.5528	6.240
7	3.5	0.6793	7.656
8	4	0.8029	9.440
9	4.5	0.9530	11.31
10	5	1.1870	14.72

As shown in Table 1, by measuring the current consumed in the thermoelectric element 14 on the basis of the reference calorific value and calculating the temperature deviation, the k1, k2, k3 model coefficients can be obtained experimentally. By substituting Equation 1, it can be seen that the values of the model coefficients included in the 95% confidence interval are k1 = -1.291, k2 = 9.673, and k3 = -0.3156. In this case, it can be confirmed that the R-square value is 0.9996 and high reliability. Also, the mean square root deviation (RMSE) value is 0.0359, indicating that the error is also low.

8A to 8C are graphs comparing the values of calorific values estimated based on experiments with the result of measuring the calorific value of the battery after the model coefficients were substituted into Equation 1; First, FIG. 8A illustrates the calorific value according to time change, and it can be seen that the mean square root deviation value is 0.0714W, and the experimental value and the estimated value are almost identical.

FIG. 8B illustrates an increase in current over time. Compared with the data value of FIG. 8A, the current value consumed by the thermoelectric element is the same in the same time range to maintain a constant temperature of the battery as the heat generation amount increases. It can be seen that the increase.

FIG. 8C illustrates the temperature deviation according to the time change, and as shown in FIGS. 8A and 8B, the temperature deviation may increase in the same time range.

As described above, in the present invention, the calorific value measuring apparatus 1 using the thermoelectric element can be manufactured. Since the thermoelectric element can perform both cooling and heating, the structure thereof can be greatly simplified as compared with a conventional calorific value measuring device.

In addition, the formula for calculating the calorific value of the target heating element 12 is a characteristic formula of the thermoelectric element 14 used to keep the temperature of the target heating element 12 constant, regardless of whether the equipment actually manufactured or changed, that is, The process of calculating the calorific value of the target heating element 12 by replacing with Equation 1 can be greatly simplified.

The thermoelectric element 14 has a short reaction rate of a few ms compared to the conventional cooling and heating apparatus. The calorific value measuring device 1 manufactured by using the characteristics of the thermoelectric element 14 may measure the calorific value of the target heating element 12 with a shorter time unit and higher accuracy than the conventional apparatus.

The industrial sector that required the measurement of calorific value targets large devices such as heat engines and factory facilities. Recently, however, it is important to know how much heat is generated by portable electronic devices (smartphones, etc.), semiconductors (CPUs and memories, etc.) or energy storage devices (batteries and fuel cells), and how to solve them.

Devices in this field have a relatively low heat generation and fast changing thermal characteristics compared to the prior art. Therefore, the equipments developed by the present invention may include all the heating elements that can be directly in contact with the thermoelectric element or the conductor, that is, relatively small or small heating devices, that is, what kind of thermal characteristics of the target heating elements described above It is applicable to all fields that need to be investigated and researched.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A measuring unit including at least one thermoelectric element installed on the target heating element to enable thermal conductivity;

An insulating case surrounding a region excluding one side of the target heating element in contact with the thermoelectric element such that the heat generated from the target heating element is transferred to the outside through the thermoelectric element; And

A control calculator configured to apply predetermined power to the thermoelectric element to lower the temperature of the thermoelectric element to control the temperature of the target heating element to a predetermined temperature condition, and calculate a total amount of power used for temperature control of the target heating element;

Comprising, calorific value measuring device.
The method of claim 1,

And a heat transfer part disposed to be in direct contact with the thermoelectric element such that heat generated from the target heating element is transferred through the thermoelectric element.
The method of claim 2,

The calorific value of the target heating element is calculated by the following equation 1 in the control operation unit, calorific value measuring apparatus.

[Equation 1]

Here, the Q pump is the calorific value of the target heating element, k 1 , k 2 , k 3 is the model coefficient, I is the current consumed by the thermoelectric element, T cool is the thermoelectric element and Contact surface temperature between the heat transfer part, and T hot is the contact surface temperature between the thermoelectric element and the target heating element)
The method of claim 2,

The thermoelectric element is disposed in contact with each other without being spaced apart from the heat transfer unit, calorific value measuring device.
The method of claim 2,

The heat transfer unit,

And a heat dissipation structure disposed in direct contact with the thermoelectric element, the heat dissipation structure including at least one of a thermal pad, a thermal grease, and a heat sink.
The method of claim 5,

The heat transfer unit,

And a cooling device disposed on the heat dissipation structure and having at least one of a cooling pin or a cooling fan.
The method of claim 2,

The heat transfer unit,

And a cooling device arranged to be in direct contact with the thermoelectric element, the cooling device including at least one of a cooling pin or a cooling fan.
The method of claim 1,

The target heating element includes one of the structures that can be in contact with the thermoelectric element to enable thermal conductivity, calorific value measuring apparatus.
The calorific value measurement using the calorific value measuring device according to any one of claims 1 to 8,

Preparing the target heating element in the calorific value measuring device;

Generating heat from the target heating element to change the temperature of the target heating element;

Transferring heat generated from the target heating element to the heat transfer part via the thermoelectric element;

Monitoring temperature of the thermoelectric element in the measurement unit and transmitting temperature data to the control operation unit; And

The control operation unit calculates the power to be applied to the thermoelectric element in order to control the temperature of the target heating element to a predetermined temperature condition, applying power to the thermoelectric element through a power supply device, by measuring the total amount of power applied Calculating a calorific value of the target heating element;

Comprising, calorific value measuring method.