JP5439161B2 - Hydrogen gas leak monitoring system - Google Patents

Description

  The present invention relates to a hydrogen station, and more particularly to a soundproof cover of a hydrogen compressor installed in a hydrogen station.

  A hydrogen station for filling a fuel cell vehicle with hydrogen gas as a fuel includes a hydrogen generator or a hydrogen storage tank for supplying hydrogen gas, and a hydrogen compression device for compressing the supplied hydrogen gas to a high pressure. And a high-pressure tank for storing compressed hydrogen, and a filling device for filling the on-vehicle tank of the fuel cell vehicle with high-pressure hydrogen (see Patent Document 1).

JP 2003-194297 A

When installing a hydrogen compression device outdoors in the hydrogen station mentioned above, it is necessary to add a soundproof cover to the cover provided for the protection of internal devices, etc. due to the necessity of noise reduction of the hydrogen compression device. There is.
Furthermore, the soundproof cover of this hydrogen compression device has a structure that prevents hydrogen gas from staying inside the soundproof cover even when hydrogen gas leaks into the soundproof cover from the hydrogen compression device main body in order to prevent gas explosion (retention) Prevention structure) is important.
An object of the present invention is to provide a hydrogen compression apparatus having a structure in which a soundproof cover is installed in the hydrogen compression apparatus and hydrogen gas does not stay inside the soundproof cover.

  In order to solve the above problems, the hydrogen gas compression device of the present invention has a soundproof cover, and in the hydrogen compression device that compresses and outputs the input hydrogen gas, the soundproof cover is installed on the lower side of the side surface. And a forced suction fan and a natural discharge outlet installed on the ceiling side.

In order to solve the above problems, the hydrogen gas leak monitoring system of the present invention includes a soundproof cover and at least one hydrogen gas sensor, and compresses and outputs the input hydrogen gas, When the hydrogen gas sensor information is input and the detector detects the hydrogen gas concentration, and when the detector continuously detects a hydrogen gas concentration value equal to or higher than a predetermined value, the hydrogen compressor is tripped. And a trip operation unit.
In the hydrogen gas leak monitoring system according to the present invention, preferably, the hydrogen sensor is a hydrogen sensor capable of detecting a hydrogen gas concentration at a ppm level.
Furthermore, in the hydrogen gas leak monitoring system of the above invention, preferably, when the hydrogen gas leak concentration exceeds a predetermined value, the compression device is tripped.
Furthermore, in the hydrogen gas leak monitoring system according to the present invention, preferably, when the hydrogen gas leak concentration exceeds a predetermined value continuously for a predetermined time or longer, the compression device is tripped.

According to the present invention, a cover is provided on the hydrogen compression device to enhance the soundproofing effect of the hydrogen compression device, and the danger of hydrogen gas explosion and the like can be prevented beforehand by providing the cover with a retention prevention structure. .
According to the present invention, a hydrogen gas sensor is provided inside the cover, and when a predetermined amount or more of hydrogen gas is detected, a hydrogen gas leak monitoring system that trips the hydrogen compression device is constructed. The safety and reliability against the dangers are further improved.

It is a schematic diagram of one Example of the hydrogen station which concerns on this invention. It is a block diagram of one Example of the main body of the hydrogen compression apparatus concerning the present invention. It is the equipment arrangement | positioning figure which looked at the hydrogen compression apparatus main body based on this invention from the top in the state without a cover. It is a figure which shows the result of having examined the ventilation performance with some models of the arrangement | positioning of the suction inlet and discharge outlet of a soundproof cover, attaching a soundproof cover to a hydrogen compression apparatus. It is a figure for demonstrating one Example of the soundproof cover of the hydrogen compression apparatus of this invention. It is a block diagram which shows the structure of one Example of the hydrogen gas leak monitoring system of this invention.

The hydrogen compression device of the present invention is provided with a cover for protecting the device and reducing noise, and even when hydrogen gas leaks into the cover from the hydrogen compression device main body, the leaked hydrogen gas does not stay inside the cover. A retention prevention structure was adopted.
Therefore, the cover of the hydrogen compression device of the present invention is subjected to a model test that simulates the shape and installation position of the hydrogen compression device main body and auxiliary parts, and the installation position of the ventilation fan, the required air volume, and the installation position of the discharge port Optimized for.

  Furthermore, the hydrogen gas leak monitoring system of the present invention includes a hydrogen sensor capable of detecting hydrogen gas at a ppm level inside the soundproof cover, and a control device that monitors sensor information of the hydrogen sensor. A detector that detects the hydrogen gas concentration value from the sensor information, and a trip operation unit that trips the hydrogen compressor when the detector continuously detects a hydrogen gas concentration value that is equal to or greater than a predetermined value for a predetermined time. It is a safety protection system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of each drawing, the same reference numerals are assigned to components having a common function, and duplication of description is avoided as much as possible.

First, before describing a hydrogen compression apparatus, an embodiment of a hydrogen station according to the present invention will be described with reference to the drawings. FIG. 1 schematically shows a hydrogen station 100 that supplies hydrogen as fuel to the fuel cell vehicle 6. FIG. 1 is a schematic view of an embodiment of a hydrogen station according to the present invention.
In FIG. 1, there are two methods for supplying hydrogen gas to the fuel cell vehicle 6, an on-site type and an off-site type.

In the on-site type, alcohol or petroleum fuel is reformed by the reformer 1 to obtain hydrogen for fuel. In another on-site type, although not shown, pure hydrogen is generated by electrolyzing water.
In the hydrogen station 100 including a hydrogen generator that generates pure hydrogen gas by the reformer 1 or an apparatus for electrolyzing water, the pressure of the generated hydrogen gas is about 0.6 MPa.

On the other hand, in the off-site type hydrogen station 100, pure hydrogen gas is taken out from by-product hydrogen or the like and sealed in a cylinder at a high pressure. This set of high-pressure cylinders is called a gas cylinder (hydrogen storage tank) 2. The gas cylinder 2 is filled with hydrogen gas at a pressure of about 15 to 20 MPa.
The hydrogen station 100 shown in this embodiment has both on-site and off-site characteristics.

The hydrogen gas supplied from either the reformer 1 or the gas cylinder 2 is too low to be supplied to the fuel cell vehicle 6 at the same pressure, so it is necessary to increase the pressure. For this pressure increase, a hydrogen compression device 3, which will be described in detail later, is connected to the downstream side of the reformer 1 and the gas cylinder 2.
The hydrogen gas that has been stepped up to a predetermined pressure by the hydrogen compressor 3 is temporarily stored in the pressure accumulator unit (high pressure tank) 4. In order to supply the pressurized hydrogen gas to the fuel cell vehicle 6, a dispenser (filling device) 5 equipped with an adapter adapted to the supply port of the fuel cell vehicle 1 is connected to the pressure accumulator unit 4.

Details of the hydrogen compressor 3 used in the hydrogen station 100 shown in FIG. 1 are shown in a block diagram in FIG. FIG. 2 is a block diagram of an embodiment of the main body of the hydrogen compression apparatus according to the present invention.
In FIG. 2, the hydrogen compressor 3 has a crankshaft 8 connected to the output shaft of the motor 19, and a 5-stage compression element is attached to the crankshaft 8. That is, in FIG. 2, the crank portion of the crankshaft 8 includes a first stage piston shaft 14, a second stage piston shaft 15, a third stage piston shaft 16, a fourth stage piston shaft piston 17, and a fifth stage in order from the left end side. A piston shaft 18 is attached.

  Pistons 14 a to 18 a that reciprocate in the first stage cylinder 9 to the fifth stage cylinder 13 are attached to the tip portions of the piston shafts 14 to 18. The piston shafts 14 to 18 and the crankshaft 8 are accommodated in the frame 7. In FIG. 2, the crankshaft 8 is a horizontally extending shaft, and the piston shafts 14 to 18 reciprocate vertically in the direction perpendicular to the shaft 8. However, as shown in FIG. -18 may reciprocate in two different directions orthogonal to the crankshaft 8. If it arrange | positions in this way, the length of the crankshaft 8 can be shortened.

  A first stage snubber 22 is connected via a first stage suction control valve 101 to the suction side 1S of the first stage compression stage formed by the first stage cylinder 9 and the first stage piston 14a. A second-stage snubber 23 is connected between the first-stage discharge side 1D and the second-stage suction side 2S via a first-stage discharge control valve 103 and a first-stage intercooler 1C. Similarly, the second-stage discharge side 2D and the third-stage suction side 3S are provided with the third-stage snubber 24 via the second-stage discharge control valve 105 and the second-stage intercooler 2C, and the third-stage discharge side 3D. A fourth stage snubber 25 is connected to the fourth stage suction side 4S via the third stage discharge control valve 107 and the third stage intercooler 3C, and between the fourth stage discharge side 4D and the fifth stage suction side 5S. A fifth stage snubber 26 is connected via a fourth stage discharge control valve 108 and a fourth stage intercooler 4C.

  Further, in the first-stage compression stage to the third-stage compression stage, the suction side pipe and the discharge side pipe are connected via the bypass valves 102, 104, and 106, respectively. An aftercooler 5C, a check valve, a discharge snubber 27, a filter 28, and a fifth-stage discharge control valve 109 are connected in series to the discharge pipe of the fifth-stage compression stage, which is the final compression stage. The hydrogen gas leaking into the frame 7 is returned to the first stage snubber 22 via a return line 35 with a check valve 32 interposed.

  As described above, the supply source for supplying hydrogen to the hydrogen compression apparatus configured as described above is the reformer 21 in the case of the on-site type, and in the case of the off-site type, the high-pressure cylinder unit 401. become. In this embodiment, the first-stage snubber 22 and the reformer 6 are connected via an on-off valve 31 as an on-site type. Further, as an off-site type, a high-pressure cylinder card 401 is connected from the first stage to the third stage snubber.

  The high pressure cylinder cardle unit 401 has a plurality of high pressure cylinder cards 411 to 414, and each high pressure cylinder card 411 to 414 is connected to the header 402 via valves 403 to 406. The header 402 and the first stage snubber are connected by a line 421, and a remote operation valve 201 and a control valve 301 are interposed in the line 421. Similarly, the header 402 and the second stage snubber 23 are connected by a line 422, the remote control valve 202 and the control valve 302 are provided on the line 422, and the header 402 and the third stage snubber 24 are connected by a line 423. The line 423 is provided with a remote control valve 203 and a control valve 303. The control valves 301 to 309 at each stage are driven by control signals transmitted from the snubbers 22 to 24 at the respective stages. Further, the fourth stage snubber 25 and the header 402 are connected by a line 424 through the remote control valve 204.

  The operation of the hydrogen station shown in this embodiment configured as described above will be described below. When used as an on-site type hydrogen supply station, the hydrogen gas generated from the reformer 21 is guided to the first stage cylinder 9 via the first stage snubber 22 and the first stage suction control valve 101. The hydrogen gas guided to the first stage cylinder 9 is compressed by the first stage cylinder 9, then cooled by the first stage intercooler 1 </ b> C through the control valve 103, and stored in the second stage snubber 23.

  The hydrogen gas stored in the second stage snubber 23 is guided from the second stage snubber 23 to the suction side 2S of the second stage cylinder 10, compressed by the second stage cylinder 10, and discharged from the discharge side 2D. Then, after passing through the second stage control valve 105, it is cooled by the second stage intercooler 2 </ b> C and stored in the third stage snubber 24. Thereafter, through the same procedure, the hydrogen gas is compressed by the third-stage cylinder 11, the fourth-stage cylinder 12, and the fifth-stage cylinder 13, and the pressure is sequentially increased. The hydrogen gas compressed to a predetermined pressure in the fifth stage cylinder 13 is cooled by the aftercooler 5C, and then stored in a pressure accumulator (not shown) via the discharge snubber 27 and the filter 28.

  By the way, the discharge pressure in the third-stage cylinder 11 of the hydrogen compressor 3 shown in this embodiment is about 15 to 20 MPa. Therefore, a high-pressure cylinder unit 401 is connected to the fourth-stage snubber 25 by a line 424 so that it can be operated as an off-site type hydrogen station. When used as an off-site type hydrogen station, the bypass valves 102, 104, 106 were opened, the first to third stage cylinders 9 to 11 were unloaded, and were interposed in the fourth stage line 424. Open the remote control valve 204. The filling pressure of the high pressure cylinders 411 to 414 is about 15 to 20 MPa, and is just about the required pressure of the fourth stage snubber 25, so that it can be operated as an off-site type station.

  In the off-site type hydrogen station, hydrogen gas filled in the high-pressure cylinders 411 to 414 is used. Of course, the hydrogen gas to be filled may be supplied from the outside. In this embodiment, in order to improve the operation efficiency of the hydrogen compression apparatus 3, the hydrogen gas created by the reformer 21 is used as a hydrogen gas. When the amount is small, the high pressure cylinders 411 to 414 can be filled. Details thereof will be described below.

  In an on-site type hydrogen station, it is difficult to start / stop a hydrogen generation facility such as the reformer 20 for a short time. Therefore, conventionally, the reformer 20 is continuously operated, and when the hydrogen charging load on the fuel cell vehicle 6 is small, the gas generated in the reformer 20 is burned or thrown into the atmosphere. In order to operate the hydrogen station efficiently, it is necessary to avoid the use of useless hydrogen as much as possible. Therefore, when the hydrogen charging load on the fuel cell vehicle 6 is small, hydrogen gas is charged from the fourth stage snubber 25 to the high pressure cylinders 411 to 414 of the high pressure cylinders 401 at a pressure of about 15 to 20 MPa.

  On the other hand, when the hydrogen charging load on the fuel cell vehicle 6 is large, hydrogen gas having a pressure of about 15 to 20 MPa filled in the high pressure cylinders 411 to 414 is used. At that time, the remote control valve 204 is opened, the hydrogen gas is sucked from the fourth-stage snubber 25, and compressed to about 80 MPa by the fourth-stage and fifth-stage cylinders 12 and 13.

  Since the hydrogen gas supplied from the header 402 is added to the fourth stage cylinder 12, the compression ratio of the entire hydrogen compression device 3 is relatively lowered, the power consumption of the hydrogen compression device 3 is reduced, and economic efficiency is reduced. Will improve. When hydrogen gas is supplied to the fuel cell vehicle 6, the original pressure of the high pressure cylinders 411 to 414 gradually decreases.

  When the pressure of the high-pressure cylinders 411 to 414 becomes equal to or lower than the allowable suction pressure of the fourth-stage compression stage, the remote control valve 204 interposed in the line 424 communicating with the fourth-stage snubber 25 is closed. Then, the remote control valve 203 interposed in the line 423 communicating with the third stage snubber 24 is opened.

  As a result, the supply destination of the hydrogen gas with reduced pressure stored in the high pressure cylinders 411 to 414 is changed from the fourth stage snubber 25 to the third stage snubber 24. The hydrogen gas supplied to the third stage snubber is gradually increased in pressure by the third to fifth cylinders 11 to 13 and finally compressed to about 80 MPa. When the pressure of the high-pressure cylinders 411 to 414 further decreases, the lines 422 and 421 connected to the header 402 are switched, and the hydrogen supply destination snubber (intake snubber) in the high-pressure cylinders 411 to 414 is changed. The second-stage snubber and the first-stage snubber are sequentially changed.

  Finally, the remote control valve 201 interposed in the line 421 communicating with the first stage snubber 22 is opened, and the other remote control valves 202 to 204 are closed. In this state, the hydrogen compression apparatus 3 can be operated without wasting hydrogen gas until the pressure in the high-pressure cylinders 411 to 414 decreases to approximately 0.6 MPa. Therefore, the hydrogen gas filled in the high pressure cylinders 411 to 414 can be almost used up.

  In the embodiment of FIGS. 1 and 2, the hydrogen station having both the on-site type and the off-site type has been dealt with, but the hydrogen station having only the off-site type can be operated in the same manner. In this embodiment, each valve is controlled by detecting the pressure of the hydrogen gas supply line, so that the opening and closing of the valve can be controlled automatically. As a result, no complicated operation is required manually. As described above, in the hydrogen compression device described above, useless use such as burning the hydrogen gas generated in the reformer or throwing it into the atmosphere can be reduced, and the running cost of the hydrogen compression device can be reduced. In addition, the energy efficiency of the hydrogen station is improved.

Next, an outline of the arrangement of an embodiment of the hydrogen compression apparatus of the present invention will be described with reference to FIG. FIG. 3 is an equipment layout view of the hydrogen compression apparatus main body as viewed from above without a cover.
In FIG. 3, the hydrogen compressor 3 includes a hydrogen compressor main body 320, a compressor drive motor 330, a gas cooler 340, a suction snubber 350, a discharge snubber 360, a primary filter case 371, a secondary filter case 372, and the like on a common base 310. Is installed. In the hydrogen gas leak monitoring system, two hydrogen sensors 381 and 382 are installed at positions where the risk of hydrogen gas leakage is high.
Note that arrows a, b, c, and d in FIG. 3 will be described later with reference to FIG.

An example of the arrangement of the soundproof cover of the hydrogen compression apparatus of the present invention will be described with reference to FIG. FIG. 4 is a diagram showing the results of examining the ventilation performance by attaching a soundproof cover to the hydrogen compression apparatus and examining several models (models) of the arrangement of the suction port and the discharge port of the soundproof cover. In the section of the ventilation explanatory diagram, the hydrogen compressor is viewed from the side so that the arrangement of the intake and discharge ports, the presence or absence of a fan, etc. can be understood.
In addition, in the column of ventilation explanatory drawing of FIG. 4, an arrow shows the flow of gas.

Model <1-1> has a structure in which a forced suction fan 42 ′ is installed on the lower side of the side surface of the soundproof cover 41 and a natural discharge outlet 43 is installed on the ceiling side.
Model <1-2> has a structure in which a suction port 42 is installed on the ceiling side of the soundproof cover 41 and a forced discharge fan 43 'is installed on the lower side of the side surface.
Model <2-1> has a structure in which a forced suction fan 42 ′ is installed on the ceiling side of the soundproof cover 41 and a discharge port 43 is installed on the lower side of the side surface.
Model <2-2> has a structure in which a suction port 42 is installed on the ceiling side of the soundproof cover 41 and a forced discharge fan 43 'is installed on the lower side of the side surface.
Model <3> has a structure in which a forced suction fan 42 ′ and a discharge port 43 are installed on the ceiling side of the soundproof cover 41.
Model <4> shows a model test method for a structure in which a forced suction fan 42 ′ is installed below the common base 45 of the hydrogen compressor, and a discharge port 43 is installed on the ceiling side of the soundproof cover 41.

In the model test combined as described above, as a result of examining the position of the fan, the suction port, and the discharge port using the tuft method or the like, in model <1-1>, no gas retention was observed, and It was confirmed that it is optimal for a soundproof cover with a prevention structure.
That is, in a hydrogen compression apparatus that has a soundproof cover and compresses and outputs input hydrogen gas, the soundproof cover includes a forced suction fan installed on the lower side of the side surface and a natural discharge installed on the ceiling side. A discharge port is provided so that soundproofing and hydrogen gas do not stay in the soundproof cover even when hydrogen gas leaks from the hydrogen compressor main body into the soundproof cover.
As described above, a model test simulating the shape and installation position of the hydrogen compressor main unit and auxiliary parts was conducted, the installation position of the ventilation fan (suction fan or discharge fan), the required air volume, the discharge port, The installation position of the suction port can be optimized and applied to the actual machine.

  FIG. 5 shows an installation diagram of a soundproof cover applied to an actual machine. FIG. 5 is a view for explaining an embodiment of the soundproof cover of the hydrogen compression apparatus of the present invention. 5 is installed on the floor surface 501, FIG. 5 (a) is a view of the hydrogen compression device of FIG. 3 as viewed from the arrow a, and FIG. 5 (b) is the hydrogen compression device of FIG. 5 is a view of the hydrogen compression device of FIG. 3 as viewed from the arrow c, and FIG. 5D is a view of the hydrogen compression device of FIG. 3 as viewed from the arrow d. However, the cover 41 is partially transparent so that the inside of the hydrogen compression apparatus can be seen.

  Reflecting the result of the test model <1-1> shown in FIG. 4, a forced suction fan 42 'is installed below the side surface of the soundproof cover 41, and the discharge port 43 is installed on the ceiling side. Further, hydrogen sensors 381 and 382 capable of detecting the hydrogen gas concentration at ppm level are installed inside the soundproof cover 41, the hydrogen gas concentration value is taken into the operation panel for driving the compressor, and the hydrogen gas concentration is the ventilation capacity of the soundproof cover. The system is designed to trip the compressor when the concentration value exceeds the limit and is dangerous for the operation of the equipment.

Next, a hydrogen gas leak monitoring system using the soundproof cover for the hydrogen compression apparatus of the present invention will be described with reference to FIG. FIG. 6 is a block diagram showing the configuration of an embodiment of the hydrogen gas leak monitoring system of the present invention.
A hydrogen sensor (see hydrogen sensors 381 and 382 in FIGS. 3 and 5) capable of detecting the hydrogen gas concentration at the ppm level is installed inside the soundproof cover 41, and whether or not hydrogen gas is staying in the soundproof cover 41. In addition, when the hydrogen gas concentration value detected by the hydrogen sensor is input to the operation panel for driving the hydrogen compression device and the hydrogen gas concentration exceeds the ventilation capacity of the soundproof cover, it becomes a dangerous concentration value for equipment operation. Build a safety protection system structure that trips the hydrogen compressor.
As a hydrogen sensor, for example, there is a combustible gas sensor module FCM-6812-P00 manufactured by Figaro Giken Co., Ltd.

In FIG. 6, when the on-off valve 31 of the hydrogen compressor 3 is open, hydrogen gas to be compressed is input. Further, compressed hydrogen gas is discharged from the fifth stage discharge control valve 109. The operation panel 600 for driving the hydrogen compression apparatus includes at least hydrogen concentration detectors 681 and 682 and a control unit 610.
In the hydrogen compression apparatus 3, the hydrogen sensors 381 and 382 output sensor information sensed at predetermined time intervals to the hydrogen concentration detectors 681 and 682, respectively.
The hydrogen concentration detectors 681 and 682 detect the hydrogen concentration value from the input sensor information and output it to the control unit 610.
The control unit 610 is, for example, a trip operation unit, and monitors whether the hydrogen concentration value input from either the hydrogen concentration detector 681 or 682 exceeds a predetermined value. And when the time when the hydrogen concentration value input from either exceeds the predetermined value is continuously the predetermined time or more, the hydrogen compressor 3 is stopped. Note that the control unit 610 also executes other controls of the hydrogen station, but description thereof is omitted in this specification.
For example, when the trip operation is performed, the on-off valve 31 of the hydrogen compressor 3 is closed, and the motor 330 of the hydrogen compressor 3 is stopped.

According to the above embodiment, in the hydrogen compression device for filling the fuel cell vehicle with hydrogen gas as fuel, even when hydrogen gas leaks from the hydrogen compression device into the soundproof cover, the hydrogen gas is inside the soundproof cover. Therefore, a highly safe soundproof cover can be installed in the hydrogen compressor.
In addition, by installing a hydrogen sensor capable of detecting hydrogen gas at the ppm level inside the soundproof cover of the stay prevention structure, by configuring a hydrogen gas leak monitoring system configuration to monitor that hydrogen gas is not staying in the soundproof cover, When the detected hydrogen gas concentration value exceeds the ventilation capacity of the soundproof cover and becomes a dangerous concentration value for equipment operation, it is possible to provide a safety protection system that trips the hydrogen compressor. .

  The present invention has been described in detail with the embodiments. However, the present invention is not limited to the above-described embodiments, and any person who has ordinary knowledge in the technical field to which the present invention belongs can modify the present invention based on the spirit and spirit of the present invention. Of course, the invention which can be changed is included.

1: reformer, 2: high-pressure hydrogen cylinder, 3: hydrogen compressor, 4: pressure accumulator unit, 5: dispenser, 6: fuel cell vehicle, 7: frame, 8: crankshaft, 9: first stage Cylinder, 10: Second stage cylinder, 11: Third stage cylinder, 12: Fourth stage cylinder, 13: Fifth stage cylinder, 14: First stage piston, 15: Second stage piston, 16: Third stage piston 17: 4th stage piston (plunger), 18: 5th stage piston (plunger),
19: motor, 21: reformer (hydrogen generator), 22: first stage snubber, 23: second stage snubber, 24: third stage snubber, 25: fourth stage snubber, 26: fifth stage snubber, 27: Discharge snubber, 28: Filter, 31: Open / close valve, 41: Soundproof cover, 42: Suction port, 42 ': Forced suction fan, 43: Discharge port, 43': Forced discharge fan, 45: Common base, 100: Hydrogen station 101: First stage suction control valve 102: First stage bypass valve 103: First stage discharge control valve 104: Second stage bypass valve 105: Second stage discharge control valve 106: Third-stage bypass valve 107: Third-stage discharge control valve 108: Fourth-stage discharge control valve 109: Fifth-stage discharge control valve 201-204: Remote control bar Lub, 301 to 303: control valve, 310: common base, 320: hydrogen compressor main body, 330: compressor drive motor, 340: gas cooler, 350: suction snubber, 360: discharge snubber, 371: primary filter case, 372 : Secondary filter case, 381: hydrogen sensor, 382: hydrogen sensor, 401: high-pressure cylinder unit, 402: header, 411 to 414: high-pressure cylinder, 424: line, 501: floor surface, 600: hydrogen compressor Driving control panel, 610: control unit, 681, 682: hydrogen concentration detector, 1C: first stage intercooler, 2C: second stage intercooler, 3C: third stage intercooler, 4C: fourth stage intercooler, 5C: After cooler.

Claims (4)

A soundproof cover ,
A hydrogen compression apparatus main body installed inside the soundproof cover and compressing and outputting the input hydrogen gas;
A hydrogen sensor that is installed inside the soundproof cover and detects a hydrogen gas concentration inside the soundproof cover;
A hydrogen compressor having
A hydrogen concentration detector that inputs sensor information sensed by the hydrogen sensor at predetermined time intervals and detects a hydrogen gas concentration value ;
If the hydrogen concentration detector detects the concentration value of a predetermined value or more of the hydrogen gas, a hydrogen compressor driving operation panel and a control unit which is trip operation unit for tripping the hydrogen compression apparatus main body,
A hydrogen gas leak monitoring system comprising:   2. The hydrogen gas leak monitoring system according to claim 1, wherein the hydrogen sensor is a hydrogen sensor capable of detecting a hydrogen gas concentration at a ppm level. According to claim 1 or claim 2 wherein the hydrogen gas leak monitoring system, the hydrogen gas concentration is a predetermined value, if it exceeds consecutively more than a predetermined time, and wherein the tripping operation of the hydrogen compressor body Hydrogen gas leak monitoring system. In the hydrogen gas leak monitoring system according to any one of claims 1 to 3,
The soundproof cover includes a forced suction fan installed on the lower side of the side surface,
A hydrogen gas leak monitoring system comprising a natural discharge outlet installed on a ceiling side of the side of the soundproof cover .

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