KR100931877B1 - Hydrogen storage performance evaluation device using volume method and its control method - Google Patents

Abstract

The present invention relates to an apparatus for evaluating hydrogen storage performance using a volume method and a control method thereof, and more particularly to minimizing a connection portion between a test cell in a high temperature or cryogenic environment and a standard cell maintaining constant temperature in a hydrogen storage performance evaluating apparatus. Minimize the measurement error of hydrogen storage due to the temperature gradient of the connection part of the two cells, and keep the temperature of supply gas constant with the thermoelectric system using the thermoelectric element, and use the test cell Minimize the measurement error of the hydrogen storage volume by calculating the internal volume according to the temperature change of the standard cell, estimate and adjust the volume change according to the pressure of the hydrogen storage body, and store the hydrogen by adsorption and desorption conditions based on the equilibrium conditions. An apparatus for evaluating performance and a control method thereof.

The evaluation apparatus of the present invention forms a protrusion by protruding an upper portion of a main body including a constant temperature chamber, and by mounting a test cell by piping a drawing tube vertically from the protrusion, a standard cell in the constant temperature chamber and a test cell outside the constant temperature chamber. By shortening the length of the outlet pipe connecting, the measurement error of the hydrogen storage amount is reduced due to the temperature gradient of the outlet pipe, which is the connection part generated by the temperature difference between the standard cell and the test cell.

In addition, by controlling the temperature of the thermostatic chamber using a thermoelectric element, it is possible to prevent equipment damage due to corrosion and leakage of pipes and joints, and to accurately calculate the contents changed by the temperature of the test cell to measure the hydrogen storage error. It is possible to provide a control method that minimizes and estimates the volume change according to the equilibrium pressure, and minimizes the measurement error according to temperature, pressure and volume by evaluating hydrogen storage performance by adsorption and desorption composition. It became.

Hydrogen storage performance, evaluation device, measurement error, volume change, thermoelectric element

Description

Apparatus for evaluating hydrogen storage performance using volumetric method and control method thereof {more accurate determinations of hydrogen storage and controlling methods of sieverts apparatus}

The present invention relates to an apparatus for evaluating hydrogen storage performance using a volume method and a control method thereof, and more particularly to minimizing a connection portion between a test cell in a high temperature or cryogenic environment and a standard cell maintaining constant temperature in a hydrogen storage performance evaluating apparatus. Minimize the measurement error of hydrogen storage due to the temperature gradient of the connection part of the two cells, and keep the temperature of supply gas constant with the thermoelectric system using the thermoelectric element, and use the test cell Minimize the measurement error of the hydrogen storage volume by calculating the internal volume according to the temperature change of the standard cell, estimate and adjust the volume change according to the pressure of the hydrogen storage body, and store the hydrogen by adsorption and desorption conditions based on the equilibrium conditions. An improved performance evaluation apparatus for evaluating performance and a control method thereof are provided.

The standard method for evaluating hydrogen storage performance using the volume method was published by JIS (JIS H7201) in Japan in 1991, and the KS standard (KS D 0073) was published in 2002. And the relationship with temperature. Accordingly, three variables of pressure, volume, and temperature which have interlocking relations are precisely measured and controlled, and the degree of influence of factors affecting the three variables has been considered.

Among these three variables, temperature control has a problem in that a hydrogen storage amount calculation error occurs due to a difference between a temperature of a test cell experimenting in a cryogenic and high temperature environment and a temperature inside a hydrogen storage performance evaluation device.

In addition, the volume control has a method of estimating the contents using a standard cell that knows the contents accurately. However, water or mercury is used to measure the volume of the standard cell, which is difficult to test and the reliability of the results is low. In addition, each joint portion that binds the standard cell and the hydrogen storage evaluation device has a problem that the internal volume is changed by the joint pipe during binding.

Existing equipment was to control the gas temperature of the standard cell in a constant temperature chamber using distilled water. Distilled water may be contaminated if left for a long time. This phenomenon can cause corrosion and malfunction of the standard cell valve and supply line due to the contamination of distilled water, and if the thermostatic chamber leaks, there is a risk of serious damage to the electronic control equipment.

On the other hand, as a method of evaluating hydrogen storage performance, there is a method of estimating the content using a content measurement standard material which is not brittle with hydrogen and knows the volume accurately. Although the method is simple and the reliability of the measured value is higher, there is a disadvantage in that the volume change due to the temperature of the test cell cannot be detected in a high temperature or cryogenic environment.

Next, the hydrogen storage performance evaluation apparatus using the volume method measures the hydrogen storage amount of the hydrogen storage body while increasing the pressure sequentially by applying the hydrogen storage capacity measuring method using the PCT isotherm method, so that the volume of the hydrogen storage body has a sequential pressure change. Will continue to change. There was a problem in that the reliability of the measurement result was low because the volume change of the hydrogen storage body could not be corrected.

In addition, the adsorption pressure and adsorption and equilibrium time during the isothermal adsorption and desorption process vary depending on the characteristics of the hydrogen storage body. In particular, the time taken for desorption time is longer than the adsorption time and goes through several desorption steps. Since the time taken for the adsorption and desorption time has been arbitrarily input by the user, there is a disadvantage that the adsorbing and desorption of hydrogen proceeds to the next adsorption and desorption step after the input time has elapsed. There is a need for means and methods.

Hydrogen storage performance evaluation apparatus using the volume method of the present invention for solving the above problems,

A main body including a constant temperature chamber which maintains a constant temperature by the thermoelectric element; A hydrogen supply pipe for supplying hydrogen to the constant temperature chamber; A helium supply pipe for supplying helium, which is an inert gas, to a constant temperature chamber; A main pipe which is piped in a constant temperature chamber, one end of which receives each gas from the hydrogen supply pipe and the helium supply pipe, and the other end of which is formed with an outlet for discharging the internal gas; A test cell which is connected to one side of the main pipe and detachably coupled to an end of the outgoing pipe which is drawn out of the main body; And a vacuum pipe communicating with the main pipe and having a vacuum pump for allowing the inside of the main pipe to be in a vacuum state.

In addition, the control method of the hydrogen storage performance evaluation apparatus using the volume method of the present invention,

A main body containing a constant temperature chamber, a hydrogen supply pipe and a helium supply pipe, a main pipe in the constant temperature chamber, a test cell installed at an end of the drawing pipe drawn out from the main pipe and exposed to the outside, and a vacuum inside the main pipe. After measuring the contents of the standard cell and the test cell using the hydrogen storage performance evaluation device using the volumetric method of the hydrogen storage, including the vacuum pipe equipped with a vacuum pump to make a furnace, and putting the hydrogen storage in the test cell In the control method of increasing the pressure in order to measure the volume change of the hydrogen storage in accordance with the pressure change, and calculates this to evaluate the hydrogen storage performance; Minimizing the temperature gradient by shortening the length of the outlet pipe connecting the standard cell inside the constant temperature chamber and the test cell outside the main body; The main pipe of the constant temperature chamber is equipped with a temperature sensor so as to be as close as possible to the branch of the outlet tube, so that the temperature controller drives the thermoelectric element by the temperature measurement value to maintain a constant temperature inside the constant temperature chamber including the standard cell. It was.

As described in detail above, the hydrogen storage performance evaluation apparatus using the volume method of the present invention and a control method thereof,

Protruding the upper portion of the main body including a constant temperature chamber to form a protrusion, and by mounting the test cell by piping the withdrawal pipe vertically from the protrusion, the drawing tube connecting the standard cell in the constant temperature chamber and the test cell outside the constant temperature chamber By shortening the length, the measurement error of the hydrogen storage amount due to the temperature gradient of the drawing pipe, which is the connection part caused by the temperature difference between the standard cell and the test cell, is reduced.

In addition, by controlling the temperature of the thermostatic chamber using a thermoelectric element, it is possible to prevent equipment damage due to corrosion and leakage of pipes and joints, and to accurately calculate the contents changed by the temperature of the test cell to measure the hydrogen storage error. It is possible to provide a control method that minimizes and estimates the volume change according to the equilibrium pressure, and minimizes the measurement error according to temperature, pressure and volume by evaluating hydrogen storage performance by adsorption and desorption composition. It became.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1A to 2A, the hydrogen storage performance evaluation apparatus 1 using the volumetric method of the hydrogen storage body according to the present invention includes a body containing a constant temperature chamber 20 which maintains a constant temperature by a thermoelectric element. 10; A hydrogen supply pipe 30 for supplying hydrogen to the constant temperature chamber 20; A helium supply pipe 40 for supplying helium, which is an inert gas, to a constant temperature chamber; The main end pipe is formed in the constant temperature chamber so that one side end receives the gas from the hydrogen supply pipe 30 and the helium supply pipe 40 and joins the other end, and the other end has a discharge port that is discharged to the outside of the constant temperature chamber to discharge the internal gas. 50; A test cell 66 which is connected to one side of the main pipe and detachably coupled to an end of the outgoing pipe 60 drawn out of the main body 10; And a vacuum pipe (70) having a vacuum pump (76) communicating with the main pipe to allow the interior of the main pipe to be in a vacuum state.

The main body 10 forms a protrusion 11 having a “a” shape on the upper portion so that a part of the constant temperature chamber 20 is positioned inside the protrusion, and the constant temperature chamber 20 is disposed on the bottom of the protrusion 11. Vertically pipe the withdrawal pipe 60 from, so that the test cell 66 is coupled to the lower end of the withdrawal pipe.

In addition, the hydrogen supply pipe 30 and the helium supply pipe 40 are each equipped with line filters 31 and 41 for filtering foreign substances contained in the gas, pressure gauges 321 and 421 for measuring the pressure in the pipe and Pressure regulating valves 32 and 42, check valves 33 and 43 for preventing backflow of gas, needle valves 34 and 44 for adjusting the flow rate of the supplied gas, and the gas in a constant temperature chamber ( 20 are mounted with high-pressure bellows valves 35 and 45 for intermittent flow into the standard cell 59.

Next, the main pipe 50 is equipped with a plurality of pressure transducers 58 and a high-pressure bellows valve 55 'as a standard cell to finely control the pressure in the pipe, and the branch of the outlet pipe 60. In close proximity to the temperature sensor 56 is mounted to sense the gas temperature in the outlet pipe. The temperature sensor 56 senses the gas temperature in the outlet pipe, and if the sensing value is different from the set value, the temperature controller 57 operates the thermoelectric element to adjust the temperature of the constant temperature chamber 20 and accordingly the standard By controlling the temperature of the constant temperature chamber by using a thermoelectric element such as to maintain a constant gas temperature in the cell 59, it is possible to prevent corrosion and loss of equipment due to leakage of distilled water. In addition, one end of the main pipe 50 is formed as a discharge port to be discharged to the outside of the constant temperature chamber 20 to discharge the internal gas. The high-pressure bellows valve 55 is installed at the portion that is exposed to the outside to control the gas, and the needle valve 54 for adjusting the flow rate and the check valve 53 for preventing the inflow of external air are installed. do.

The vacuum pipe 70 in communication with the main pipe 50 has a high-pressure bellows valve (75, 75 ') for controlling the pipe, a vacuum pressure gauge (79) for measuring the pressure of the pipe, and the pressure of the pipe Accordingly, the solenoid valve 78, the line trap 77, and the check valve 73 and the vacuum pump 76 for preventing the reverse flow are provided. Accordingly, the high pressure bellows valves 35 and 45 of the helium supply pipe 40 and the hydrogen supply pipe 30 connected to the main pipe 50 inside the constant temperature chamber are blocked, and the high pressure bellows valve 75 of the vacuum pipe 70 is blocked. When the vacuum pump 76 is driven after opening the '75', the standard cell 59 inside the constant temperature chamber 20 is in a vacuum state. Next, the high pressure bellows valves 75 and 75 'of the vacuum pipe are shut off, and then the helium gas or the hydrogen gas is supplied to the high pressure bellows valves 35 and 45 of the hydrogen supply pipe 30 or the helium supply pipe 40. After shutting off, the high-pressure bellows valve 65 of the outlet pipe is opened to measure the volume, parallel temperature, and parallel pressure of the standard cell 59 and the test cell 66.

On the other hand, the withdrawal pipe 60 is installed in communication with one side of the main pipe 50, the high-pressure bellows valve 65 is installed so that the pipe is interrupted, the line filter 61 and the flow rate for removing foreign matter Needle valves 64 for adjusting the respective are mounted, and the test cell 66 is mounted at the end to allow the performance evaluation. As the outlet pipe 60 is vertically piped from the main body protrusion 11 as shown in FIG. 2A, a test with the standard cell 59, which is a main pipe in the constant temperature chamber 20, is performed rather than being previously piped. The connection length between the cells 66 was minimized to minimize measurement errors due to the temperature gradient of each cell.

In addition, as shown in FIGS. 1B and 1C, the heating unit 80 is detachably installed in the test cell 66 to apply a temperature to the test cell. The heating means 80 is configured to surround the test cell 66 by forming a variety of forms, such as a pad form wired inside the heating wire or a built-in heating plate, and further equipped with a temperature measuring sensor to heat the set temperature This can be done.

The heating means 80 is applied to the test cell 66 by the weight of the heating means when mounted on the test cell 66, the lead-out pipe 60 connecting the test cell 66 and the standard cell 59 Opening of the seam may cause measurement errors. Therefore, when the tray 12 is installed on the main body 10 to be pulled out, and the heating means 80 surrounding the test cell 66 is mounted, the tray is withdrawn and the heating means 80 is placed on the upper portion of the tray 12. This settling can prevent the load from being transferred to the test cell 66.

Next, as shown in Figure 2a, the control method of the hydrogen storage evaluation device,

The main body 10 containing the constant temperature chamber 20, the hydrogen supply pipe 30 and helium supply pipe 40, the main pipe installed in communication with the hydrogen supply pipe and helium supply pipe, the standard cell which is the main pipe in the constant temperature chamber and The vacuum pipe 70 is provided with a test cell 66 installed at an end of the drawing pipe 60 drawn out from the main pipe and exposed to the outside, and a vacuum pump 76 for making the inside of the main pipe into a vacuum state. Using the hydrogen storage performance evaluation device (1) using the volumetric method of the hydrogen storage body comprising a) to measure the contents of the standard cell and the test cell, and put the hydrogen storage medium in the test cell, the pressure is sequentially raised In the control method of measuring the volume change of the hydrogen storage according to the change and calculating the hydrogen storage performance, the standard cell 59 inside the constant temperature chamber 20 is connected to the test cell 66 outside the main body. Shorten length of drawer tube 60 to say Turn and minimize the temperature gradient; The main pipe 50 of the constant temperature chamber is equipped with a temperature sensor 56 so as to be as close as possible to the branch of the outlet pipe 60, the temperature controller 57 drives the thermoelectric element by the temperature measurement value to include a standard cell. The temperature inside the constant temperature chamber 20 is kept constant.

The control method minimizes the occurrence of temperature error through the temperature gradient and temperature control inside the constant temperature chamber due to structural improvement. If you look closely at this,

The outlet pipe 60 is a connection portion connecting the test cell 66 and the standard cell 59 to a connection portion exposed to the outside from the main body 10. When the hydrogen storage temperature condition of the hydrogen storage body is a high temperature or low temperature, the temperature of the test cell 66 is different from the standard cell 59 that maintains room temperature, so that a temperature gradient inevitably occurs at the connection site. .

Figure 3 shows the equation of the number of moles of hydrogen atoms adsorbed to the hydrogen storage body at the equilibrium pressure k step, the wider the interval of the temperature gradient described above, the actual temperature of the test cell by the formula shown in FIG. Since the difference between the connection part and the test cell temperature (Tcell) occurs, the hydrogen storage error becomes large.

That is, the connection part of the existing equipment is fastened to the test cell in the form of protruding out of the storage device while being bent in the form of "a", the outlet pipe 60, which is an exposed connection part of the present invention as shown in Figure 1a Likewise, the test pipe 66 is fastened by being vertically piped from the apparatus. Therefore, the length is shorter than that of the existing exposed connection portion bent by the letter “a”, thereby reducing the temperature gradient range, thereby reducing the measurement error.

In addition, the existing equipment was intended to control the gas temperature of the standard cell with a constant temperature chamber using distilled water or other refrigerants. However, distilled water or other refrigerants may be contaminated if left for a long time. This phenomenon causes the valve and the supply line of the standard cell to be corroded by the contamination of the distilled water or the risk of malfunction, and if there is a leak in the constant temperature chamber, there is a risk of damaging the electronic control equipment of the equipment.

In order to solve the problem, a constant temperature chamber using a thermoelectric element was used to maintain a constant gas temperature of the standard cell 59. Temperature control using the thermoelectric element can prevent contamination and malfunction of the device due to the use of distilled water or other refrigerants. In order to precisely control the temperature of the constant temperature chamber 20, it is preferable to install the temperature sensor 56 in the main pipe as closely as possible to the branch of the outlet pipe. That is, since the drawing tube 60 is exposed to the outside and exposed to the high or low temperature environment of the test cell 66, a temperature gradient may occur, so that the temperature sensor 56 in the pipe as close as possible to the branch where the drawing tube is branched. By mounting a temperature of the gas sensitive to the external temperature change is controlled by the temperature controller 57 of the constant temperature chamber 20 to maintain a constant gas temperature inside the standard cell (59).

Next, the volumetric measurement method of the test cell according to temperature using the volumetric standard is examined.

The volumetric standard was made of the same material as the test cell 66 and the surface was subjected to EP treatment. Since the test cell material will expand or contract in volume due to the inherent properties of the material in a high temperature or cryogenic environment, a correction is required. Since the measurement standard is the same material as the test cell, the expansion coefficient is the same, which can reduce the content deviation due to temperature change. In addition, the external skin treatment can be used to prevent content calculation errors due to pressure variations that can occur due to adsorption of gas to the content measurement standard.

Specific experimental method

In the first step, the empty test cell 66 is bound to the apparatus and then vacuumed using the vacuum pump 76. Supplying helium gas at an appropriate pressure while closing the high pressure bellows valve 65 installed in the outlet pipe 60 and when the equilibrium state is reached, the high pressure bellows valve 65 of the outlet pipe is opened and the standard cell 59 is opened. And the equilibrium pressure and equilibrium temperature across the test cell 66 are measured.

In the second step, after the experiment is finished, the volumetric standard is placed in the test cell 66, and then bound to the apparatus, and then vacuumed using a vacuum pump. Supply helium gas at the appropriate pressure while closing the high-pressure bellows valve 65 on the outlet pipe and when the equilibrium is reached, open the outlet-side high-pressure bellows valve to maintain the equilibrium pressure and equilibrium temperature across the standard and test cells. Measure

After the two-step experiment is completed, the content of the standard cell and the content of the connection part of the test cell and the drawing pipe can be obtained by substituting the formula shown in FIG. 4.

Next, look at the volume measurement of the sample through the control method,

After putting the hydrogen reservoir in the test cell 66, the filling pressure and the equilibrium pressure are recorded while increasing the pressure sequentially as in the PCT isotherm measuring method (Korean Industrial Standard KS D 0066). By using the appropriate condition equation (EOS) with the pressures noted above, the volumetric value of the hydrogen reservoir with pressure changes is derived. When the hydrogen storage amount is calculated from the PCT isotherm measured value using hydrogen, the calculated volume value is substituted into the volume value of the hydrogen storage body required by the formula. However, if the equilibrium pressure value measured in the hydrogen storage process and the equilibrium pressure value produced in the hydrogen volume measurement step are different, the value corrected by the arithmetic mean is substituted. In this process, the volume of the hydrogen storage body estimated at the equilibrium pressure of each stage of the hydrogen storage process can be obtained by substituting the equation shown in FIG. 5.

In the test method, the hydrogen reservoir is placed in the test cell 66 and the inside of the equipment is vacuumed using the vacuum pump 76. After supplying gas with a suitable pressure while closing the high pressure bellows valve 65 on the outlet pipe 60 side and reaching the equilibrium state, open the high pressure bellows valve on the outlet pipe side to open the standard cell 59 and the test cell. Measure the equilibrium pressure and equilibrium temperature over (66). Then, close the withdrawal high pressure bellows valve and repeat the above steps up to the maximum pressure to measure hydrogen storage while supplying additional pressure. The volume change of the hydrogen reservoir according to each pressure change is calculated by FIG. 6.

Based on the volume of the hydrogen storage with respect to the equilibrium pressure calculated by FIG. 6, the volume of the hydrogen storage corresponding to the equilibrium pressure of the PCT isotherm is estimated and substituted into FIG. The number of hydrogen atoms adsorbed can be calculated.

Next, it is possible to reduce the measurement time by controlling the boosting process in the boosting step of raising the pressure by controlling the equilibrium time.

That is, when measuring the adsorption amount, it is important to check the equilibrium pressure applied to the adsorption after the gas is introduced into the adsorption vessel and to confirm that the temperature is kept stable. For this purpose, the existing equipment was designed to move to the next stage after waiting for equilibrium pressure for the set waiting time after the gas inflow. Hence, for hydrogen reservoirs that have not reached equilibrium at the set waiting time, they will be forced to move to the next stage, thus failing to find the value of the complete equilibrium condition. In order to prevent this, if the setting wait time is set to a considerable period, it takes a long time to maintain the equilibrium state every step, there is a problem that takes a long time experiment.

In order to solve the above problems, if the user inputs an equilibrium duration time and an allowable range of equilibrium pressure and equilibrium temperature corresponding to the equilibrium duration time before the experiment starts, the equilibrium pressure after the gas inflow is set during the standby time. Pressure and temperature must be within tolerance to be considered equilibrium and proceed to the next step. Therefore, the amount of hydrogen storage can be calculated according to the equilibrium conditions having different characteristics for each storage body, and the measurement time can be shortened compared to the past method, which proceeds to the next step after a predetermined equilibrium time elapses.

By reducing the error range by controlling the measurement process in each process, the volume of the hydrogen reservoir for various equilibrium pressures, the contents of the standard cell, the contents of the connection part of the test cell and the outlet pipe, and the hydrogen adsorbed on the hydrogen reservoir The reliability of each value, such as the number of moles of atoms, can be improved to enable quality measurements.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

Figure 1a is a schematic diagram showing a hydrogen storage performance evaluation apparatus according to the present invention.

Figure 1b is a schematic diagram showing a hydrogen storage performance evaluation apparatus is installed tray according to the present invention.

Figure 1c is a perspective view showing the main part of the hydrogen storage performance evaluation apparatus equipped with a heating means according to the present invention.

Figure 2 is a block diagram showing the configuration of the hydrogen storage performance evaluation apparatus according to the present invention.

Figure 3 is a formula for calculating the number of moles of hydrogen atoms adsorbed to the hydrogen storage at the equilibrium pressure k stage.

Figure 4 is a calculation formula of the sum of the contents of the standard cell and the connection part and the test cell which is the lead pipe.

5 is a calculation formula for calculating the volume of the hydrogen storage body estimated at the equilibrium pressure for each step during the hydrogen storage process.

6 is a formula for calculating the volume of the hydrogen storage for the k stage equilibrium pressure.

<Explanation of symbols for the main parts of the drawings>

1: Performance evaluation device 10: Main body

11: protrusion 12: tray

20: constant temperature chamber 30: hydrogen supply pipe

31,41,61: Line filter 32,42: Pressure regulating valve

33,43,53,73: Check valve 34,44,54,64,74: Needle valve

35,45,55,55 ', 65,75,75': High pressure bellows valve

40: helium supply pipe 50: main piping

56: temperature sensor 57: temperature control

58: pressure transducer 59: standard cell

60: withdrawal tube 66: test cell

70: vacuum piping 76: vacuum pump

77: line trap 78: solenoid valve

79: vacuum pressure gauge 80: heating means

321,421: Pressure gauge

Claims (13)

A main body 10 including a constant temperature chamber 20 which maintains a constant temperature by the thermoelectric element; A hydrogen supply pipe 30 for supplying hydrogen to the constant temperature chamber; A helium supply pipe 40 for supplying helium, which is an inert gas, to a constant temperature chamber; A main pipe 50 which is piped in a constant temperature chamber, one end of which receives each gas from the hydrogen supply pipe and the helium supply pipe, and the other end of which is formed with an outlet port to be discharged to the outside of the constant temperature chamber to discharge the internal gas; A test cell 66 which is connected to one side of the main pipe and detachably coupled to an end of the outgoing pipe 60 drawn out of the main body; A vacuum pipe (70) having a vacuum pump (76) communicating with the main pipe to allow the interior of the main pipe to be in a vacuum state; The main body 10 forms a protrusion 11 having a “a” shape on the upper portion so that a part of the constant temperature chamber 20 is positioned inside the protrusion, and the drawing tube 60 is drawn from the constant temperature chamber at the bottom of the protrusion. Vertical pipe and the hydrogen storage performance evaluation apparatus using a volume method characterized in that the test cell 66 is coupled to the lower end of the outlet pipe to shorten the length of the pipe between the constant temperature chamber and the test cell. The method of claim 1, The hydrogen supply pipe 30 and the helium supply pipe 40, the line filter (31, 41) for removing the foreign matter contained in the gas, the pressure control valve (32, 42) for adjusting the pressure in the pipe body, Check valves 33 and 43 for preventing gas backflow, needle valves 34 and 44 for adjusting the flow rate of the supplied gas, and high pressure bellows valves 35 and 45 for controlling the gas flow. Including, The vacuum pipe 70 has a high-pressure bellows valve (75, 75 ') for controlling the pipe, a vacuum pressure gauge (79) for measuring the pressure of the pipe, and the solenoid valve 78 is opened and closed in accordance with the pressure of the pipe And a line trap (77), a check valve (73) and a vacuum pump (76) for preventing backflow. delete The method of claim 1, The main pipe 50 is equipped with a temperature sensor 56 close to the branch of the outlet pipe 60, the temperature controller 57 operates the thermoelectric element according to the measured value of the temperature sensor to adjust the gas temperature in the constant temperature chamber Hydrogen storage performance evaluation device using a volume method, characterized in that to be kept constant. The method of claim 1, The test cell 66, the hydrogen storage performance evaluation apparatus using a volume method, characterized in that the heating means for detachably coupled to the heating means (80). The method of claim 5, The main body 10 has a volume, characterized in that the tray 12 for mounting the heating means is mounted so that the load of the installed heating means 80 is not transmitted to the test cell 66 and the lead-out pipe 60 Hydrogen storage performance evaluation device using the method. The main body 10 containing the constant temperature chamber 20, the hydrogen supply pipe 30 and helium supply pipe 40, the main pipe 50 installed in communication with the hydrogen supply pipe and helium supply pipe, and the main pipe in the constant temperature chamber A standard cell 59, a test cell 66 installed at an end of the outlet pipe 60 drawn out from the main pipe and exposed to the outside, and a vacuum pump 76 for vacuuming the inside of the main pipe are provided. After measuring the contents of the standard cell and the test cell using the hydrogen storage performance evaluation device (1) using the volumetric method of the hydrogen storage including the vacuum pipe (70) installed, and put the hydrogen storage in the test cell In the control method of increasing the pressure in order to measure the volume change of the hydrogen storage according to the pressure change, and calculates this to evaluate the hydrogen storage performance, Minimizing the temperature gradient by shortening the length of the drawer tube 60 connecting the standard cell 59 in the constant temperature chamber and the test cell 66 outside the main body; The main pipe 50 of the constant temperature chamber is equipped with a temperature sensor 56 so as to be as close as possible to the branch of the outlet pipe 60, the temperature controller 57 drives the thermoelectric element by the temperature measurement value to include a standard cell. To maintain a constant temperature inside the constant temperature chamber; In the step of raising the pressure in the process of measuring the volume change of the hydrogen storage according to the pressure change, the parallel duration time that the user determines the parallel time and the parallel tolerance and parallel temperature error tolerance range corresponding to the parallel duration time The control method of the hydrogen storage performance evaluation apparatus using the volume method, characterized in that to reduce the measurement time by applying the pressure of the next step when the input is satisfied in advance. The method of claim 7, wherein In the process of measuring the contents of the standard cell 59 and the test cell 66, the content measuring standard material uses the same material as the test cell to reduce the volume deviation due to temperature variation. Control method of hydrogen storage performance evaluation device using. The method of claim 8, EP control on the surface of the measurement standard material to prevent adsorption with gas to minimize the pressure deviation, characterized in that the hydrogen storage performance evaluation device using the volume method. delete The method of claim 7, wherein The number of moles of hydrogen atoms adsorbed to the hydrogen storage body at the k-stage equilibrium pressure is a control method of the hydrogen storage performance evaluation apparatus using the volume method, characterized in that obtained by FIG. The method of claim 11, 3 is a control method of a hydrogen storage performance evaluation apparatus using a volume method, characterized in that the volume of the hydrogen storage body for the equilibrium pressure in step k is obtained by FIG. The method of claim 12, 4 is a control method of the hydrogen storage performance evaluation apparatus using the volume method, characterized in that the contents of the standard cell and the contents of the lead-out tube and the test cell is obtained by FIG.

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