Hydrogen equipment container ventilation performance evaluation system

Abstract

To provide a ventilation performance determination system for a hydrogen apparatus container capable of easily determining whether or not ventilation performance has deteriorated.SOLUTION: A ventilation performance determination system for a hydrogen apparatus container in an embodiment includes: an internal temperature measuring apparatus that measures an internal temperature of an inner space; an external temperature measuring apparatus that measures an external temperature of the container; a solar radiation amount measuring apparatus that measures an amount of solar radiation emitted to the container; and a determination section. The determination section determines ventilation performance of the inner space on the basis of the internal temperature measured by the internal temperature measuring apparatus, the external temperature measured by the external temperature measuring apparatus and the solar radiation amount measured by the solar radiation amount measuring apparatus.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a ventilation performance determination system for a hydrogen equipment container. [Background technology]

[0002] Energy storage systems using hydrogen are known. For example, the energy storage system includes a hydrogen production device, a hydrogen storage device, and a fuel cell device. Of these, the hydrogen production device produces hydrogen using external power. The produced hydrogen is stored in the hydrogen storage device. The fuel cell device generates electricity using the stored hydrogen as needed, and the generated electricity is output from the system.

[0003] An energy storage system having such a configuration may be housed in a container. The container is provided with a fan for ventilating the internal space. The container is provided with an intake port for drawing in outside air, and the intake port is provided with a filter for filtering the air. During operation, the fan is driven, and heat generated by the hydrogen production device and the fuel cell device is discharged to the outside of the container.

[0004] The fan deteriorates over time, and the ventilation performance may decrease. The filter captures dust and other particles in the air, and may become clogged with continued operation. If the filter becomes clogged, the ventilation performance may decrease.

[0005] The deterioration of the fan and the clogging of the filter depend on the surrounding environment of the container. Therefore, in order to determine whether the ventilation performance is deteriorating, it is effective for maintenance personnel to visually check the fan and the filter. However, it is difficult for maintenance personnel to visit the container and visually check the fan and the filter. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6114777 Summary of the Invention [Problem to be solved by the invention]

[0007] The embodiment has been made taking these points into consideration, and aims to provide a ventilation performance judgment system for a hydrogen equipment container that can easily determine whether or not ventilation performance has deteriorated. [Means for solving the problem]

[0008] A ventilation performance determination system for a hydrogen equipment container according to an embodiment is a system for determining the ventilation performance of a hydrogen equipment container configured such that hydrogen equipment that generates an exothermic reaction is housed in the internal space of the container, and air drawn into the internal space from an intake port of the container equipped with a filter is exhausted to the outside by a fan provided at an exhaust port of the container. The ventilation performance determination system for a hydrogen equipment container includes an internal temperature measuring device that measures the internal temperature of the internal space, an external temperature measuring device that measures the external temperature of the container, a solar radiation measuring device that measures the amount of solar radiation irradiated to the container, and a determination unit. The determination unit determines the ventilation performance of the internal space based on the internal temperature measured by the internal temperature measuring device, the external temperature measured by the external temperature measuring device, and the amount of solar radiation measured by the solar radiation measuring device.

[0009] A ventilation performance determination system for a hydrogen equipment container according to an embodiment is a system for determining the ventilation performance of a hydrogen equipment container configured such that hydrogen equipment that generates an exothermic reaction is housed in the internal space of the container, and air drawn into the internal space from an intake port of the container equipped with a filter is discharged to the outside by a fan provided at the exhaust port of the container. The ventilation performance determination system for a hydrogen equipment container comprises a first internal temperature measuring device that measures a first internal temperature of the internal space at a position above the hydrogen equipment, a second internal temperature measuring device that measures a second internal temperature of the internal space at a position closer to the exhaust port than the first internal temperature measuring device, and a determination unit. The determination unit determines the ventilation performance of the internal space based on the first internal temperature measured by the first internal temperature measuring device and the second internal temperature measured by the second internal temperature measuring device.

[0010] A ventilation performance determination system for a hydrogen equipment container according to an embodiment is a system for determining the ventilation performance of a hydrogen equipment container configured such that hydrogen equipment that causes an exothermic reaction is housed in the internal space of the container, and air drawn into the internal space from an intake port of the container equipped with a filter is discharged to the outside by a fan provided at an exhaust port of the container. The ventilation performance determination system for a hydrogen equipment container comprises a first internal temperature measuring device that measures a first internal temperature of the internal space at a position between the hydrogen equipment and the exhaust port, a second internal temperature measuring device that measures a second internal temperature of the internal space at a position above the first internal temperature measuring device, and a determination unit. The determination unit determines the ventilation performance based on the first internal temperature measured by the first internal temperature measuring device and the second internal temperature measured by the second internal temperature measuring device.

[0011] A system for judging the ventilation performance of a hydrogen equipment container according to an embodiment is a system for judging the ventilation performance of a hydrogen equipment container in which a hydrogen equipment that causes an exothermic reaction is housed in the internal space of the container, and air drawn into the internal space from an intake port of the container equipped with a filter is discharged to the outside by a fan provided at an exhaust port of the container. The ventilation performance judgment system for a hydrogen equipment container includes a first internal temperature measuring device that is located between the hydrogen equipment and the exhaust port and measures a first internal temperature at the lower part of the internal space, a second internal temperature measuring device that is located between the hydrogen equipment and the exhaust port and measures a second internal temperature at the upper part of the internal space, an image capturing device that captures an image of the air flow at a position between the hydrogen equipment and the exhaust port, and a judgment unit. The judgment unit judges the ventilation performance based on the first internal temperature measured by the first internal temperature measuring device, the second internal temperature measured by the second internal temperature measuring device, and the air flow imaged by the image capturing device. Effect of the Invention

[0012] According to the embodiment, it is possible to easily determine whether or not the ventilation performance has decreased. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic diagram showing a ventilation performance determination system for a hydrogen equipment container according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a graph showing the transition of the internal and external temperatures of the hydrogen equipment container of FIG. [Diagram 3] FIG. 3 is a schematic diagram showing a ventilation performance determination system for a hydrogen equipment container according to a second embodiment of the present invention. [Figure 4] FIG. 4 is a graph showing a schematic distribution of the internal temperature of the hydrogen equipment container of FIG. [Diagram 5] FIG. 5 is a schematic diagram showing a ventilation performance determination system for a hydrogen equipment container according to a third embodiment of the present invention. [Figure 6]FIG. 6 is a graph showing a schematic distribution of the internal temperature of the hydrogen equipment container of FIG. [Figure 7] FIG. 7 is a schematic diagram showing a ventilation performance determination system for a hydrogen equipment container according to the fourth embodiment of the present invention. [Figure 8] FIG. 8 is a graph showing a schematic distribution of the internal temperature of the hydrogen equipment container of FIG. [Figure 9] FIG. 9 is a schematic diagram showing a ventilation performance determination system for a hydrogen equipment container according to the fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the ventilation performance determination system for a hydrogen equipment container according to the present embodiment will be described with reference to the drawings.

[0015] (First embodiment) A ventilation performance determination system for a hydrogen equipment container according to this embodiment will be described with reference to Figures 1 and 2. The ventilation performance determination system for a hydrogen equipment container according to this embodiment is applied to a hydrogen equipment container. First, this hydrogen equipment container will be described.

[0016] As shown in Fig. 1, the hydrogen equipment container 1 according to this embodiment contains equipment that constitutes an energy storage system. This energy storage system is configured to produce and store hydrogen using external power, and generate power in a fuel cell device using the stored hydrogen as needed.

[0017] More specifically, the hydrogen equipment container 1 includes a container 2, a hydrogen equipment 3, an intake port 4, a filter 5, an exhaust port 6, a fan 7, and a control device 8.

[0018] The container 2 is a rectangular parallelepiped housing having an internal space 2a. The container 2 is formed, for example, in a size of a container 2 standardized for transportation, and is configured to be transportable with equipment housed inside. For example, the container 2 may be formed in a size of a standardized 20-foot container or 12-foot container. The 20-foot container is specified by the ISO standard, and has a length of 6096 mm, a width of 2438 mm, and a height of 2591 mm. The 12-foot container is also specified by the ISO standard, and has a length of 3600 mm, a width of 2438 mm, and a height of 2591 mm.

[0019] The hydrogen equipment 3 is housed in the internal space 2a and is equipment that generates an exothermic reaction. The hydrogen equipment 3 includes a hydrogen production device, a hydrogen storage device, and a fuel cell device. The hydrogen production device produces hydrogen using electric energy supplied from an external power source. Hydrogen is produced by electrolyzing water. Heat is generated during this electrolysis. The hydrogen storage device stores the hydrogen produced by the hydrogen production device. The fuel cell device chemically reacts the stored hydrogen with oxygen to generate electricity and produce water. Heat is generated during this power generation.

[0020] The suction port 4 draws air from outside the container 2 into the internal space 2a. The suction port 4 may be configured as an opening formed in one side wall of the container 2.

[0021] The filter 5 may be attached to the suction port 4. The filter 5 is configured to capture dust from the air drawn into the internal space 2a from the suction port 4 and filter the air.

[0022] The outlet 6 discharges air from the internal space 2a to the outside of the container 2. The outlet 6 may be configured as an opening formed in one side wall of the container 2. The outlet 6 may be formed in a side wall opposite to the side wall in which the inlet 4 is formed.

[0023] The fan 7 may be attached to the exhaust port 6. The fan 7 is configured to ventilate the internal space 2a. When the fan 7 is driven, the air in the internal space 2a is exhausted to the outside of the container 2 through the exhaust port 6.

[0024] The control device 8 is configured to control the above-mentioned hydrogen equipment container 1. More specifically, the control device 8 controls the hydrogen equipment 3 that is composed of the above-mentioned hydrogen production device, hydrogen storage device, and fuel cell device. The control device 8 may also control the above-mentioned fan 7.

[0025] In this way, the hydrogen equipment container 1 is configured so that the hydrogen equipment 3 that causes an exothermic reaction is housed in the internal space 2a of the container 2. The hydrogen equipment container 1 is also configured so that air that is drawn into the internal space 2a from the intake port 4 of the container 2, which is provided with a filter 5, is discharged to the outside by a fan 7 provided at the exhaust port 6 of the container 2.

[0026] The hydrogen equipment container 1 according to this embodiment further includes a ventilation performance determination system for a hydrogen equipment container (hereinafter simply referred to as the ventilation performance determination system 10). The ventilation performance determination system 10 is a system that determines the ventilation performance of the above-mentioned hydrogen equipment container 1. The ventilation performance can be reduced by at least one of clogging of the filter 5 and deterioration of the fan 7.

[0027] The internal temperature measuring device 11 measures the internal temperature of the internal space 2a. In the example shown in Fig. 1, the internal temperature measuring device 11 is located above the hydrogen device 3, and is located in the upper part of the internal space 2a.

[0028] The external temperature measuring device 12 measures the external temperature of the container 2. In the example shown in Fig. 1, the external temperature measuring device 12 is attached to the upper surface of the container 2 and measures the temperature of the air outside the container 2. The external temperature measuring device 12 is located at a position on the upper surface of the container 2 close to the discharge outlet 6, but is not limited to this.

[0029] The solar radiation meter 13 measures the amount of solar radiation irradiated onto the container 2. In the example shown in Fig. 1, the solar radiation meter 13 is attached to the upper surface of the container 2 and measures the amount of solar radiation irradiated onto the upper surface of the container 2. Solar radiation is the amount of radiant energy received from the sun per unit area per unit time. The solar radiation meter 13 is located on the upper surface of the container 2 at a position close to the intake port 4, but is not limited to this position.

[0030] The determination unit 14 may be built into the control device 8 described above.

[0031] The determination unit 14 according to this embodiment determines whether or not the ventilation performance has deteriorated based on the internal temperature measured by the internal temperature measuring device 11, the external temperature measured by the external temperature measuring device 12, and the amount of solar radiation measured by the solar radiation measuring device 13. The internal temperature measuring device 11, the external temperature measuring device 12, and the amount of solar radiation measuring device 13 are connected to the determination unit 14, and the measured internal temperature, external temperature, and amount of solar radiation are transmitted to the determination unit 14.

[0032] The determination unit 14 may store the temperature difference between the internal temperature and the external temperature when the hydrogen equipment 3 is stopped in association with the amount of solar radiation. In other words, the internal temperature, the external temperature, and the amount of solar radiation are measured when the operation is stopped, and the temperature difference when the hydrogen equipment 3 is stopped is calculated from the internal temperature and the external temperature, and is stored in the determination unit 14 in association with the amount of solar radiation. It is preferable that the temperature difference when the hydrogen equipment 3 is stopped is stored in association with various amounts of solar radiation. The temperature difference when the hydrogen equipment 3 is stopped in association with the amount of solar radiation. The temperature difference when the hydrogen equipment 3 is stopped in association with the amount of solar radiation, and the internal space 2a is ventilated.

[0033] The determination unit 14 determines the ventilation performance by comparing the temperature difference at the time of determination between the internal temperature and the external temperature measured at the time of determination with the temperature difference at the time of stop corresponding to the amount of solar radiation measured at the time of determination. In other words, the internal temperature, the external temperature, and the amount of solar radiation are measured at the time of determination, and the temperature difference at the time of determination is obtained from the internal temperature and the external temperature. If the value obtained by subtracting the temperature difference at the time of stop from the temperature difference at the time of determination is greater than a predetermined threshold value, it is determined that the ventilation performance has decreased. In this case, the temperature difference at the time of stop is the temperature difference at the time of stop associated with the amount of solar radiation at the time of operation that is the same as or closest to the amount of solar radiation at the time of determination. The temperature difference at the time of determination may be expressed as the internal temperature minus the external temperature. The threshold value may be set arbitrarily, taking into account the measurement error of each measuring device, etc.

[0034] Next, a method for determining the ventilation performance in the ventilation performance determination system 10 for a hydrogen equipment container according to this embodiment will be described.

[0035] When operation of the hydrogen equipment 3 is stopped, the internal temperature is measured by the internal temperature measuring device 11, and the external temperature is measured by the external temperature measuring device 12. From the measured internal and external temperatures, the judgment unit 14 determines the temperature difference at shutdown. The determined temperature difference at shutdown is associated with the amount of solar radiation measured at this time by the solar radiation measuring device 13 and stored in the judgment unit 14. Temperature differences at shutdown are determined in a similar manner for various amounts of solar radiation, and the temperature differences at shutdown are stored in association with the amount of solar radiation. In this way, a database of temperature differences at shutdown is constructed.

[0036] While the hydrogen equipment 3 is operating, the determination unit 14 determines the ventilation performance of the internal space 2a. During the determination, the internal temperature is measured by the internal temperature measuring device 11, and the external temperature is measured by the external temperature measuring device 12. From the measured internal and external temperatures, the determination unit 14 determines a determination-time temperature difference. At this time, a stop-time temperature difference associated with an amount of solar radiation that is the same as or closest to the amount of solar radiation measured by the solar radiation measuring device 13 is selected from a database of multiple stop-time temperature differences stored in the determination unit 14. The selected stop-time temperature difference is subtracted from the determined determination-time temperature difference, and if this difference is greater than a predetermined threshold, the determination unit 14 determines that the ventilation performance has decreased.

[0037] During operation of the hydrogen equipment 3, the hydrogen production device or fuel cell device serving as the hydrogen equipment 3 generates an exothermic reaction. The generated heat warms the air in the internal space 2a, and the warmed air rises. When the ventilation performance is normal, an air flow is formed from the intake port 4 toward the exhaust port 6. In this case, the warmed air joins the air flow toward the exhaust port 6 and is exhausted from the exhaust port 6 to the outside of the container 2. This suppresses an increase in the internal temperature. Therefore, when the ventilation performance is normal, the temperature difference between the internal temperature and the external temperature is relatively small.

[0038] On the other hand, when the ventilation performance is degraded, the air flow from the inlet 4 to the outlet 6 weakens, and in some cases, such an air flow does not occur. In this case, the air warmed by the heat generated by the hydrogen equipment 3 remains in the upper part of the internal space 2a. This can cause the internal temperature to rise. Therefore, the temperature difference between the internal temperature and the external temperature becomes relatively large. When this temperature difference is somewhat larger than the temperature difference when the device is stopped, it can be said that the ventilation performance is degraded.

[0039] For example, the determination unit 14 may determine that the ventilation performance has deteriorated when the difference between the temperature difference at the time of determination and the temperature difference at the time of operation stop becomes larger than a predetermined threshold value multiple times.

[0040] FIG. 2 is a graph showing a schematic diagram of the transition of the internal temperature and the external temperature of the hydrogen equipment container 1 when the operation and stopping of the hydrogen equipment 3 in FIG. 1 are repeated. FIG. 2 shows the transition of temperature when the ventilation performance is normal during the first operation, and the ventilation performance is deteriorated during the second operation and the third operation. As shown in FIG. 2, during the first operation, the difference between the internal temperature and the external temperature is small because the ventilation performance is normal. During the second operation, the ventilation performance is deteriorated, so the internal temperature may rise more than the external temperature. When the operation of the hydrogen equipment 3 is stopped, the internal temperature drops, and eventually the internal temperature becomes almost equal to the external temperature. When the operation of the hydrogen equipment 3 is then resumed as the third operation, the internal temperature may rise more than the external temperature in the same manner as during the second operation.

[0041] The determination unit 14 may determine that the ventilation performance has decreased when the value obtained by subtracting the temperature difference at stop from the temperature difference at determination becomes larger than a predetermined threshold for the first time due to a temperature rise during operation of the hydrogen equipment 3. For example, in the example shown in FIG. 2, the internal temperature exceeds the temperature threshold during the second operation, so that it may be determined that the ventilation performance has decreased. It may also be determined that the ventilation performance has decreased when the internal temperature exceeds the temperature threshold for the first time. The temperature threshold is a value obtained by converting the above-mentioned threshold into a temperature.

[0042] Alternatively, the determination unit 14 may determine that the ventilation performance is degraded when the value obtained by subtracting the temperature difference at the time of stop from the temperature difference at the time of determination becomes larger than a predetermined threshold value multiple times. For example, in the example shown in FIG. 2, the ventilation performance may not be determined to be degraded during the second operation, but may be determined to be degraded during the third operation. In this case, the ventilation performance is determined to be degraded when the difference between the temperature difference at the time of determination and the temperature difference at the time of stop exceeds the threshold value twice. If an obstacle such as leaves or garbage adheres to the intake port 4, the ventilation performance may be degraded, but such an obstacle may be naturally removed by the wind or the passage of time. For this reason, the accuracy of the determination can be improved by determining that the ventilation performance is degraded when the difference between the temperature difference at the time of determination and the temperature difference at the time of operation becomes larger than a predetermined threshold value multiple times. When the difference between the temperature difference at the time of determination and the temperature difference at the time of operation transitions from a state lower than the threshold value to a state higher than the threshold value, the number of times that the threshold value is exceeded is counted. This count may be reset during inspection by maintenance personnel, etc. The number of times that the value obtained by subtracting the temperature difference at stop from the temperature difference at determination exceeds the predetermined threshold is not limited to two times, and may be three or more times.

[0043] When it is determined that the ventilation performance has decreased, the determination unit 14 may issue an alarm by any means. For example, the determination unit 14 may notify that the ventilation performance has decreased. A maintenance person who recognizes this notification inspects the fan 7 and the filter 5, and cleans, repairs, or replaces them as necessary. This allows the ventilation performance of the internal space 2a to return to normal. Alternatively, the determination unit 14 may transmit an instruction to a notification means (not shown) to notify that the ventilation performance has decreased, and the notification means may issue the notification.

[0044] As described above, according to this embodiment, the ventilation performance of the internal space 2a is determined based on the internal temperature measured by the internal temperature measuring device 11, the external temperature measured by the external temperature measuring device 12, and the amount of solar radiation measured by the solar radiation measuring device 13. This allows the ventilation performance to be determined without the need for maintenance personnel to visit the container 2. This makes it easy to determine whether or not the ventilation performance has deteriorated. Furthermore, according to this embodiment, the ventilation performance can be determined taking into account the amount of solar radiation that affects the internal temperature of the hydrogen equipment container 1 installed outdoors. This makes it possible to improve the accuracy of determining the ventilation performance.

[0045] Furthermore, according to this embodiment, the temperature difference between the internal temperature and the external temperature when the hydrogen equipment 3 is stopped is stored in association with the amount of solar radiation, and the ventilation performance is determined by comparing the temperature difference between the internal temperature and the external temperature measured at the time of determination with the temperature difference at the time of stop corresponding to the amount of solar radiation measured at the time of determination. This makes it possible to prevent the influence of the amount of solar radiation that affects the internal temperature of the hydrogen equipment container 1 from being included in the determination of the ventilation performance. This makes it possible to further improve the accuracy of the determination of the ventilation performance.

[0046] Furthermore, according to this embodiment, when the value obtained by subtracting the stop temperature difference represented by the internal temperature minus the external temperature when the operation is stopped from the determination temperature difference represented by the internal temperature minus the external temperature when the operation is stopped is greater than a predetermined threshold value, it is determined that the ventilation performance has deteriorated. By appropriately setting the threshold value, it is possible to prevent the influence of the measurement errors of each measuring device from being included in the determination of the ventilation performance. This makes it possible to further improve the accuracy of the determination of the ventilation performance.

[0047] In the above-described embodiment, the temperature difference at the time of judgment and the temperature difference at the time of shutdown are associated with the amount of solar radiation. However, the present invention is not limited to this. For example, the temperature difference at the time of judgment and the temperature difference at the time of shutdown may correspond to the amount of heat obtained by multiplying the amount of solar radiation and the area of ​​the top surface of the container 2. More specifically, when the operation is stopped, the amount of heat is obtained by multiplying the measured amount of solar radiation by the area of ​​the top surface of the container 2, and the temperature difference at the time of shutdown is stored in association with this amount of heat. When making a judgment, the amount of heat is obtained by multiplying the measured amount of solar radiation by the area of ​​the top surface of the container 2. A temperature difference at the time of shutdown associated with the same or closest amount of heat as the obtained amount of heat is selected. The selected temperature difference at the time of shutdown is subtracted from the obtained temperature difference at the time of judgment, and if this difference is greater than a predetermined threshold, the judgment unit 14 judges that the ventilation performance has deteriorated.

[0048] In the above-described embodiment, an example has been described in which the determination unit 14 stores the stop-time temperature difference between the internal temperature and the external temperature when the hydrogen equipment 3 is stopped in association with the amount of solar radiation, and determines the ventilation performance by comparing the determination-time temperature difference between the internal temperature and the external temperature measured at the time of determination with the stop-time temperature difference corresponding to the amount of solar radiation measured at the time of determination. However, the present invention is not limited to this.

[0049] For example, the determination unit 14 may store the normal temperature difference between the internal temperature and the external temperature during normal operation when the ventilation performance is normal in association with the amount of solar radiation, and determine the ventilation performance by comparing the determination temperature difference between the internal temperature and the external temperature measured at the time of determination with the stop temperature difference corresponding to the amount of solar radiation measured at the time of determination. In other words, the internal temperature, the external temperature, and the amount of solar radiation are measured at the time of determination, and the determination temperature difference is obtained from the internal temperature and the external temperature. If the value obtained by subtracting the normal temperature difference from the determination temperature difference is greater than a predetermined threshold value, it is determined that the ventilation performance has decreased. In this case, the normal temperature difference is the normal temperature difference associated with the amount of solar radiation during normal operation that is the same as or closest to the amount of solar radiation at the time of determination. The normal temperature difference may be expressed as the internal temperature minus the external temperature. In this case, it is possible to prevent the influence of the amount of solar radiation that affects the internal temperature of the hydrogen equipment container 1 from being included in the determination of the ventilation performance, and the accuracy of the determination of the ventilation performance can be further improved.

[0050] (Second embodiment) Next, a ventilation performance determination system for a hydrogen equipment container according to a second embodiment of the present invention will be described with reference to Figs.

[0051] The second embodiment shown in Figures 3 and 4 differs mainly in that the ventilation performance of the internal space is determined based on a first internal temperature of the internal space at a position above the hydrogen equipment and a second internal temperature of the internal space at a position close to the exhaust port, and the other configurations are substantially the same as those of the first embodiment shown in Figures 1 and 2. Note that in Figures 3 and 4, the same parts as those of the first embodiment shown in Figures 1 and 2 are given the same reference numerals and detailed explanations are omitted.

[0052] As shown in Fig. 3, ventilation performance determination system 10 according to this embodiment includes a first internal temperature measuring device 21 and a second internal temperature measuring device 22 instead of the internal temperature measuring device 11 shown in Fig. 1. Ventilation performance determination system 10 shown in Fig. 3 does not necessarily include external temperature measuring device 12 and solar radiation measuring device 13.

[0053] The first internal temperature measuring device 21 measures the first internal temperature of the internal space 2a. In the example shown in Fig. 3, the first internal temperature measuring device 21 is located above the hydrogen equipment 3 and at the upper part of the internal space 2a.

[0054] The second internal temperature measuring device 22 measures the second internal temperature of the internal space 2a. In the example shown in Fig. 3, the second internal temperature measuring device 22 is located closer to the exhaust outlet 6 than the first internal temperature measuring device 21, and is located at the upper part of the internal space 2a.

[0055] The ventilation performance determination system 10 according to the present embodiment may further include a third internal temperature measuring device 23. The third internal temperature measuring device 23 measures the internal temperature of the internal space 2a. In the example shown in Fig. 3, the third internal temperature measuring device 23 is located closer to the intake port 4 than the first internal temperature measuring device 21, and is located at the upper part of the internal space 2a.

[0056] The determination unit 14 according to this embodiment determines the ventilation performance of the internal space 2a based on the first internal temperature measured by the first internal temperature measuring device 21 and the second internal temperature measured by the second internal temperature measuring device 22. The first internal temperature measuring device 21 and the second internal temperature measuring device 22 are connected to the determination unit 14, and the measured first internal temperature and second internal temperature are transmitted to the determination unit 14.

[0057] The determination unit 14 may store a normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal. In other words, the first internal temperature and the second internal temperature are measured during normal operation, and the normal temperature difference is calculated from the first internal temperature and the second internal temperature and stored in the determination unit 14. The normal temperature difference may be expressed as the second internal temperature - the first internal temperature.

[0058] The determination unit 14 determines the ventilation performance by comparing the normal temperature difference with the temperature difference at the time of determination between the first internal temperature and the second internal temperature measured at the time of determination. In other words, the first internal temperature and the second internal temperature are measured at the time of determination, and the temperature difference at the time of determination is obtained from the first internal temperature and the second internal temperature. The determination unit 14 according to this embodiment determines that the ventilation performance has decreased when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal is greater than a predetermined threshold. The temperature difference at the time of determination may be expressed as the second internal temperature minus the first internal temperature. The threshold may be set arbitrarily, taking into account the measurement error of each measuring device and the like. The determination unit 14 may determine that the ventilation performance has decreased when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal becomes greater than the predetermined threshold for the first time. Alternatively, the threshold may determine that the ventilation performance has decreased when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal becomes greater than the predetermined threshold multiple times.

[0059] During operation of the hydrogen equipment 3, the determination unit 14 determines the ventilation performance of the internal space 2a. During the determination, the first internal temperature is measured by the first internal temperature measuring device 21, and the second internal temperature is measured by the second internal temperature measuring device 22. From the measured first and second internal temperatures, the determination unit 14 determines a temperature difference at determination. The temperature difference at determination is subtracted from the normal temperature difference described above, and if this difference is greater than a predetermined threshold value, it is determined that the ventilation performance has decreased.

[0060] During operation of the hydrogen equipment 3, the hydrogen production device or fuel cell device serving as the hydrogen equipment 3 generates an exothermic reaction. The generated heat warms the air in the internal space 2a, and the warmed air rises. When the ventilation performance is normal, an air flow is formed from the intake port 4 toward the exhaust port 6. In this case, the warmed air rides on the air flow toward the exhaust port 6 and is exhausted from the exhaust port 6 to the outside of the container 2. As a result, as shown by the solid arrow in FIG. 3, the air warmed in the vicinity of the hydrogen equipment 3 flows toward the exhaust port 6, suppressing an increase in the first internal temperature. For this reason, the second internal temperature is likely to become higher than the first internal temperature.

[0061] On the other hand, when the ventilation performance is degraded, the air flow from the intake port 4 toward the exhaust port 6 weakens, and in some cases, such an air flow does not occur. In this case, as shown by the dashed arrow in FIG. 3, the air heated near the hydrogen equipment 3 rises and remains at the upper part of the internal space 2a. This can cause the first internal temperature to rise higher than the first internal temperature during normal operation, and the second internal temperature to fall lower than the second internal temperature during normal operation. The temperature difference at the time of determination, which is expressed by the second internal temperature minus the first internal temperature, becomes smaller than the temperature difference at normal operation.

[0062] FIG. 4 shows an example of the first internal temperature and the second internal temperature during normal operation by a solid line, and shows an example of the first internal temperature and the second internal temperature during reduced ventilation performance by a dashed line. In the example shown in FIG. 4, during normal operation, the second internal temperature may be higher than the first internal temperature, and the temperature difference at the time of judgment, represented by the second internal temperature minus the first internal temperature, may take a positive value. When ventilation performance is reduced, the first internal temperature may be higher than the second internal temperature, and the temperature difference at the time of judgment may take a negative value. As a result, the temperature difference at the time of judgment is smaller than the temperature difference at normal time. Therefore, when the value obtained by subtracting the temperature difference at the time of judgment from the temperature difference at normal time is larger than a predetermined threshold value, it can be determined that the ventilation performance is reduced.

[0063] Thus, according to this embodiment, the first internal temperature measuring device 21 measures the first internal temperature of the internal space 2a at a position above the hydrogen equipment 3, and the second internal temperature measuring device 22 measures the second internal temperature of the internal space 2a at a position closer to the exhaust port 6 than the first internal temperature measuring device. The ventilation performance of the internal space 2a is determined based on the first internal temperature measured by the first internal temperature measuring device 21 and the second internal temperature measured by the second internal temperature measuring device 22. This makes it possible to determine the ventilation performance without the maintenance personnel visiting the container 2. Therefore, it is possible to easily determine whether or not the ventilation performance has deteriorated.

[0064] According to this embodiment, the normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal is stored, and the ventilation performance is judged by comparing the temperature difference between the first internal temperature and the second internal temperature measured at the time of judgment with the temperature difference at the time of judgment. This makes it possible to meaningfully judge whether the ventilation performance has deteriorated.

[0065] Furthermore, according to this embodiment, when the value obtained by subtracting the temperature difference at the time of judgment, represented by the second internal temperature - the first internal temperature at the time of judgment, from the normal temperature difference, represented by the second internal temperature - the first internal temperature during normal operation, is greater than a predetermined threshold value, it is determined that the ventilation performance has deteriorated. By appropriately setting the threshold value, it is possible to prevent the influence of measurement errors of each measuring device from being included in the determination of the ventilation performance. This makes it possible to further improve the accuracy of the determination of the ventilation performance.

[0066] (Third embodiment) Next, a ventilation performance determination system for a hydrogen equipment container according to a third embodiment of the present invention will be described with reference to Figs.

[0067] The third embodiment shown in Figures 5 and 6 is different mainly in that the ventilation performance of the internal space is determined based on a first internal temperature of the internal space at a position between the hydrogen equipment and the exhaust port, and a second internal temperature of the internal space at a position above the measurement position of the first internal temperature, and other configurations are substantially the same as those of the second embodiment shown in Figures 3 and 4. Note that in Figures 5 and 6, the same parts as those of the second embodiment shown in Figures 3 and 4 are given the same reference numerals and detailed description will be omitted.

[0068] 5, in this embodiment, the first internal temperature measuring device 21 is located between the hydrogen equipment 3 and the exhaust outlet 6 when viewed from above. More specifically, the first internal temperature measuring device 21 is located downstream of the hydrogen equipment 3 and upstream of the exhaust outlet 6 in the air flow direction from the intake port 4 to the exhaust outlet 6. The first internal temperature measuring device 21 is also located at a height position between the hydrogen equipment 3 and the exhaust outlet 6 in the height direction.

[0069] The second internal temperature measuring device 22 is located between the hydrogen equipment 3 and the exhaust port 6 when viewed from above. More specifically, the second internal temperature measuring device 22 is located downstream of the hydrogen equipment 3 and upstream of the exhaust port 6 in the air flow direction from the intake port 4 to the exhaust port 6. The second internal temperature measuring device 22 is also located above the first internal temperature measuring device in the height direction, and is located at the top of the internal space 2a.

[0070] The third internal temperature measuring device 23 is located between the hydrogen equipment 3 and the exhaust port 6 when viewed from above. More specifically, the third internal temperature measuring device 23 is located below the first internal temperature measuring device 21, and is located at the bottom of the internal space 2a.

[0071] The determination unit 14 according to this embodiment determines the ventilation performance of the internal space 2a based on the first internal temperature measured by the first internal temperature measuring device 21 and the second internal temperature measured by the second internal temperature measuring device 22. The first internal temperature measuring device 21 and the second internal temperature measuring device 22 are connected to the determination unit 14, and the measured first internal temperature and second internal temperature are transmitted to the determination unit 14.

[0072] The determination unit 14 may store a normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal. In other words, the first internal temperature and the second internal temperature are measured during normal operation, and the normal temperature difference is calculated from the first internal temperature and the second internal temperature and stored in the determination unit 14. The normal temperature difference may be expressed as the second internal temperature - the first internal temperature.

[0073] The determination unit 14 determines the ventilation performance by comparing the normal temperature difference with the determination temperature difference between the first internal temperature and the second internal temperature measured at the time of the determination. In other words, the first internal temperature and the second internal temperature are measured at the time of the determination, and the determination temperature difference is obtained from the first internal temperature and the second internal temperature. The determination unit 14 according to the present embodiment determines that the ventilation performance has deteriorated when the value obtained by subtracting the normal temperature difference from the determination temperature difference is greater than a predetermined threshold value. The determination temperature difference may be expressed as the second internal temperature minus the first internal temperature. The threshold value may be set arbitrarily, taking into account the measurement error of each measuring device and the like. The determination unit 14 may determine that the ventilation performance has deteriorated when the value obtained by subtracting the normal temperature difference from the determination temperature difference becomes greater than the predetermined threshold value for the first time. Alternatively, the determination unit 14 may determine that the ventilation performance has deteriorated when the value obtained by subtracting the normal temperature difference from the determination temperature difference becomes greater than the predetermined threshold value multiple times.

[0074] During operation of the hydrogen equipment 3, the hydrogen production device or fuel cell device serving as the hydrogen equipment 3 generates an exothermic reaction. The generated heat warms the air in the internal space 2a, and the warmed air rises. When the ventilation performance is normal, an air flow is formed from the intake port 4 toward the exhaust port 6. In this case, the warmed air rides on the air flow toward the exhaust port 6 and is exhausted from the exhaust port 6 to the outside of the container 2. As a result, as shown by the solid arrow in FIG. 5, the air warmed in the vicinity of the hydrogen equipment 3 flows toward the exhaust port 6, and the first internal temperature can rise. For this reason, the first internal temperature is likely to be higher than the second internal temperature.

[0075] On the other hand, when the ventilation performance is degraded, the air flow from the inlet 4 toward the outlet 6 weakens, and in some cases, such an air flow does not occur. In this case, as shown by the dashed arrow in FIG. 5, the air heated near the hydrogen device 3 rises and remains at the upper part of the internal space 2a. This can cause the first internal temperature to be lower than the first internal temperature during normal operation, and the second internal temperature to be higher than the second internal temperature during normal operation. The temperature difference at the time of determination, which is expressed by the second internal temperature minus the first internal temperature, becomes smaller than the temperature difference during normal operation.

[0076] FIG. 6 shows an example of the first internal temperature and the second internal temperature during normal operation by a solid line, and shows an example of the first internal temperature and the second internal temperature during reduced ventilation performance by a dashed line. In the example shown in FIG. 6, during normal operation, the first internal temperature may be higher than the second internal temperature, and the normal temperature difference represented by the second internal temperature minus the first internal temperature may take a negative value. When ventilation performance is reduced, the second internal temperature may be higher than the first internal temperature, and the determination temperature difference may take a positive value. As a result, the determination temperature difference is larger than the normal temperature difference. Therefore, when the value obtained by subtracting the normal temperature difference from the determination temperature difference is larger than a predetermined threshold value, it can be determined that the ventilation performance is reduced.

[0077] Thus, according to this embodiment, the first internal temperature measuring device 21 measures the first internal temperature of the internal space 2a at a position between the hydrogen equipment 3 and the exhaust port 6 when viewed from above, and the second internal temperature measuring device 22 measures the second internal temperature of the internal space 2a at a position above the first internal temperature measuring device 21. The ventilation performance of the internal space 2a is determined based on the first internal temperature measured by the first internal temperature measuring device 21 and the second internal temperature measured by the second internal temperature measuring device 22. This makes it possible to determine the ventilation performance without the maintenance personnel having to visit the container 2. Therefore, it is possible to easily determine whether or not the ventilation performance has deteriorated.

[0078] Furthermore, according to this embodiment, the first internal temperature measuring device 21 is located at a height position between the hydrogen equipment 3 and the exhaust port 6. As a result, when the ventilation performance is normal, the air warmed by the hydrogen equipment 3 can be made to flow toward the exhaust port 6 through the vicinity of the first internal temperature measuring device 21. Therefore, during normal operation, the first internal temperature can be measured at a position where the temperature rises. As a result, the accuracy of determining the ventilation performance can be improved.

[0079] According to this embodiment, the normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal is stored, and the ventilation performance is judged by comparing the normal temperature difference with the judgment time temperature difference between the first internal temperature and the second internal temperature measured at the time of judgment. This makes it possible to meaningfully judge whether the ventilation performance has deteriorated.

[0080] Furthermore, according to this embodiment, when the value obtained by subtracting the normal temperature difference represented by the second internal temperature - the first internal temperature during normal operation from the determination time temperature difference represented by the second internal temperature - the first internal temperature at the time of determination is greater than a predetermined threshold value, it is determined that the ventilation performance has deteriorated. By appropriately setting the threshold value, it is possible to prevent the influence of measurement errors of each measuring device from being included in the determination of the ventilation performance. This makes it possible to further improve the determination of the ventilation performance.

[0081] (Fourth embodiment) Next, a ventilation performance determination system for a hydrogen equipment container according to a fourth embodiment of the present invention will be described with reference to Figs.

[0082] The fourth embodiment shown in Figures 7 and 8 is different from the third embodiment shown in Figures 5 and 6 in that the first internal temperature measuring device is located within a thermal boundary layer formed on the ceiling surface of the container by natural convection, and other configurations are substantially the same as those of the third embodiment shown in Figures 5 and 6. In Figures 7 and 8, the same parts as those of the third embodiment shown in Figures 5 and 6 are denoted by the same reference numerals and detailed description thereof will be omitted.

[0083] In this embodiment, as shown in FIG. 7, the first internal temperature measuring device 21 is located in a temperature boundary layer formed on the ceiling surface 2b of the container 2 by natural convection. When the ventilation performance is degraded, the flow in the internal space 2a is dominated by natural convection formed by heat generation from the hydrogen equipment 3, and at that time, a temperature boundary layer is formed on the ceiling surface 2b of the container 2. The first internal temperature measuring device 21 according to this embodiment is located in the temperature boundary layer formed when the ventilation performance is degraded. The temperature boundary layer may be obtained in advance by numerical analysis or the like, and the first internal temperature measuring device 21 may be disposed in the temperature boundary layer obtained as a result. The second internal temperature measuring device 22 is disposed above the first internal temperature measuring device 21 in this temperature boundary layer.

[0084] The determination unit 14 according to this embodiment determines the ventilation performance of the internal space 2a based on the first internal temperature measured by the first internal temperature measuring device 21 and the second internal temperature measured by the second internal temperature measuring device 22. The first internal temperature measuring device 21 and the second internal temperature measuring device 22 are connected to the determination unit 14, and the measured first internal temperature and second internal temperature are transmitted to the determination unit 14.

[0085] The determination unit 14 may store a normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal. In other words, the first internal temperature and the second internal temperature are measured during normal operation, and the normal temperature difference is calculated from the first internal temperature and the second internal temperature and stored in the determination unit 14. The normal temperature difference may be expressed as the second internal temperature - the first internal temperature.

[0086] The determination unit 14 determines the ventilation performance by comparing the normal temperature difference with the temperature difference at the time of determination between the first internal temperature and the second internal temperature measured at the time of determination. In other words, the first internal temperature and the second internal temperature are measured at the time of determination, and the temperature difference at the time of determination is obtained from the first internal temperature and the second internal temperature. The determination unit 14 according to this embodiment determines that the ventilation performance has deteriorated when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal is smaller than a predetermined threshold value. The temperature difference at the time of determination may be expressed as the second internal temperature minus the first internal temperature. The threshold value may be set arbitrarily, taking into account the measurement error of each measuring device and the like. The determination unit 14 may determine that the ventilation performance has deteriorated when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal becomes smaller than the predetermined threshold value for the first time. Alternatively, the determination unit 14 may determine that the ventilation performance has deteriorated when the value obtained by subtracting the temperature difference at the time of determination from the temperature difference at normal becomes smaller than the predetermined threshold value multiple times.

[0087] During operation of the hydrogen equipment 3, if the ventilation performance is normal, an air flow is formed from the inlet 4 toward the outlet 6. In this case, the temperature boundary layer disappears from the ceiling surface 2b of the container 2, and forced convection due to ventilation is formed even in the vicinity of the ceiling surface 2b. Since the first internal temperature measuring device 21 and the second internal temperature measuring device 22 are disposed close to the ceiling surface 2b, the difference between the first internal temperature and the second internal temperature can be reduced.

[0088] On the other hand, when the ventilation performance is degraded, the air flow from the inlet 4 to the outlet 6 weakens, and in some cases, such an air flow does not occur. In this case, a natural convection is formed in the internal space 2a by the air warmed by the heat generated by the hydrogen equipment 3. As a result, a temperature boundary layer is formed on the ceiling surface 2b of the container 2, and the first internal temperature becomes higher than the second internal temperature.

[0089] FIG. 8 shows an example of the first internal temperature and the second internal temperature during normal operation by a solid line, and shows an example of the first internal temperature and the second internal temperature during reduced ventilation performance by a dashed line. In the example shown in FIG. 8, during normal operation, the first internal temperature and the second internal temperature may be equal, and the temperature difference at the time of judgment, represented by the second internal temperature minus the first internal temperature, may be zero. When ventilation performance is reduced, the first internal temperature may be higher than the second internal temperature, and the temperature difference at the time of judgment may be a negative value. As a result, the temperature difference at the time of judgment is smaller than the temperature difference at normal time. Therefore, when the value obtained by subtracting the temperature difference at the time of judgment from the temperature difference at normal time is smaller than a predetermined threshold value, it can be determined that the ventilation performance is reduced.

[0090] As described above, according to this embodiment, the first internal temperature measuring device 21 is located within the temperature boundary layer formed on the ceiling surface 2b of the container 2 by natural convection. As a result, when the ventilation performance is normal, the first internal temperature measured by the first internal temperature measuring device 21 can be made equal to the second internal temperature measured by the second internal temperature measuring device 22. When the ventilation performance is degraded, the first internal temperature can be made higher than the second internal temperature. Therefore, the first internal temperature can be measured at a position where the temperature rises when the ventilation performance is degraded. As a result, the accuracy of determining the ventilation performance can be improved.

[0091] According to this embodiment, the normal temperature difference between the first internal temperature and the second internal temperature during normal operation when the ventilation performance is normal is stored, and the ventilation performance is judged by comparing the normal temperature difference with the judgment time temperature difference between the first internal temperature and the second internal temperature measured at the time of judgment. This makes it possible to meaningfully judge whether the ventilation performance has deteriorated.

[0092] Furthermore, according to this embodiment, when the value obtained by subtracting the temperature difference at the time of judgment, represented by the second internal temperature - the first internal temperature at the time of judgment, from the normal temperature difference, represented by the second internal temperature - the first internal temperature during normal operation, is smaller than a predetermined threshold value, it is determined that the ventilation performance has deteriorated. By appropriately setting the threshold value, it is possible to prevent the influence of measurement errors of each measuring device from being included in the determination of the ventilation performance. This makes it possible to further improve the determination of the ventilation performance.

[0093] (Fifth embodiment) Next, a ventilation performance determination system for a hydrogen equipment container according to a fifth embodiment of the present invention will be described with reference to FIG.

[0094] The fifth embodiment shown in Fig. 9 differs mainly in that the ventilation performance of the internal space is determined based on a first internal temperature in a lower part of the internal space at a position between the hydrogen equipment and the exhaust port, a second internal temperature of the internal space at a position above the measurement position of the first internal temperature, and the air flow, and the other configurations are substantially the same as those of the third embodiment shown in Fig. 5 and Fig. 6. Note that in Fig. 7 and Fig. 8, the same parts as those of the third embodiment shown in Fig. 5 and Fig. 6 are given the same reference numerals and detailed description will be omitted.

[0095] 9, the first internal temperature measuring device 21 according to the present embodiment is located at the bottom of the internal space 2a and measures a first internal temperature at the bottom of the internal space 2a. The second internal temperature measuring device 22 according to the present embodiment is located at the top of the internal space 2a and measures a second internal temperature at the top of the internal space 2a.

[0096] The ventilation performance determination system 10 according to this embodiment further includes an image capturer 24. The image capturer 24 captures an image of the air flow at a position between the hydrogen equipment 3 and the exhaust port 6 to create a flow image. The image capturer 24 may capture an image of the movement of fine particles such as dust or dirt contained in the air within the internal space 2a to create the air flow image.

[0097] The determination unit 14 according to this embodiment determines the ventilation performance of the internal space 2a based on the first internal temperature measured by the first internal temperature measuring device 21, the second internal temperature measured by the second internal temperature measuring device 22, and the air flow imaged by the image capturing device 24. The first internal temperature measuring device 21 and the second internal temperature measuring device 22 are connected to the determination unit 14, and the measured first internal temperature and second internal temperature are transmitted to the determination unit 14. In addition, the image capturing device 24 is connected to the determination unit 14, and the created flow image is transmitted to the determination unit 14.

[0098] The determination unit 14 may store a normal flow image showing the air flow during normal operation when the ventilation performance is normal, in association with the first internal temperature and the second internal temperature. In other words, the first internal temperature and the second internal temperature are measured during normal operation, and a normal flow image is created, and the normal flow image is stored in the determination unit 14 in association with the first internal temperature and the second internal temperature. It is preferable that the normal flow image is stored in association with various first internal temperatures and second internal temperatures.

[0099] The determination unit 14 determines the ventilation performance by comparing a determination flow image showing the air flow at the time of determination with a normal flow image corresponding to the first internal temperature and the second internal temperature measured at the time of determination. In other words, at the time of determination, the first internal temperature and the second internal temperature are measured and a determination flow image is created. This determination flow image is compared with the stored normal flow image. The normal flow image used at this time is a normal flow image associated with a combination of the first internal temperature and the second internal temperature that is the same as or closest to the combination of the first internal temperature and the second internal temperature at the time of determination.

[0100] During operation of the hydrogen equipment 3, the hydrogen production device or fuel cell device serving as the hydrogen equipment 3 generates an exothermic reaction. The generated heat warms the air in the internal space 2a, and the warmed air rises. When the ventilation performance is normal, an air flow is formed from the intake port 4 toward the exhaust port 6. In this case, the warmed air rides on the air flow toward the exhaust port 6 and is exhausted from the exhaust port 6 to the outside of the container 2. As a result, an air flow is formed in which air warmed in the vicinity of the hydrogen equipment 3 flows toward the exhaust port 6, as shown by the solid arrow in FIG. 9.

[0101] On the other hand, when ventilation performance is degraded, the air flow from the intake port 4 toward the exhaust port 6 weakens, and in some cases, such an air flow does not form. In this case, as shown by the dashed arrow in FIG. 9, a flow is formed in which the air warmed near the hydrogen device 3 rises. As a result, the air flow shown in the determination flow image when ventilation performance is degraded differs from the air flow shown in the normal flow image. Such a difference in the flows is analyzed by image analysis by the determination unit 14. When the image analysis shows that the flows are different between the two, the determination unit 14 determines that ventilation performance is degraded.

[0102] Thus, according to this embodiment, the first internal temperature measuring device 21 measures the first internal temperature of the internal space 2a at a position between the hydrogen equipment 3 and the exhaust port 6, and the second internal temperature measuring device 22 measures the second internal temperature of the internal space 2a at a position above the first internal temperature measuring device 21. The image capturing device 24 captures an image of the air flow at a position between the hydrogen equipment 3 and the exhaust port 6. The ventilation performance of the internal space 2a is determined based on the first internal temperature, the second internal temperature, and the air flow. This allows the ventilation performance to be determined without the maintenance personnel visiting the container 2. Therefore, it can be easily determined whether or not the ventilation performance has decreased.

[0103] According to this embodiment, a normal flow image showing the air flow during normal operation when the ventilation performance is normal is stored in association with the first and second internal temperatures, and the ventilation performance is judged by comparing a judgment time flow image showing the air flow at the time of judgment with a normal time flow image corresponding to the first and second internal temperatures measured at the time of judgment. This makes it possible to judge whether the ventilation performance has deteriorated based on the air flow in the internal space 2a. This improves the accuracy of judging the ventilation performance.

[0104] According to the embodiment described above, it is possible to easily determine whether or not the ventilation performance has decreased.

[0105] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. In addition, it is of course possible to combine these embodiments in part as appropriate within the gist of the present invention. [Explanation of symbols]

[0106] 1: hydrogen equipment container, 2: container, 2a: internal space, 2b: ceiling surface, 3: hydrogen equipment, 4: intake port, 5: filter, 6: exhaust port, 7: fan, 8: control device, 10: ventilation performance judgment system, 11: internal temperature measuring device, 12: external temperature measuring device, 13: solar radiation measuring device, 14: judgment unit, 21: first internal temperature measuring device, 22: second internal temperature measuring device, 23: third internal temperature measuring device, 24: image capturing device

Claims

1. A ventilation performance evaluation system for a hydrogen equipment container, which evaluates the ventilation performance of a hydrogen equipment container, is configured such that hydrogen equipment that generates an exothermic reaction is housed in an internal space of the container, and air that is drawn into the internal space through an intake port of the container equipped with a filter is exhausted to the outside by a fan provided at an exhaust port of the container, An internal temperature measuring device for measuring the internal temperature of the internal space; an external temperature measuring device for measuring an external temperature of the container; A solar radiation meter for measuring the amount of solar radiation irradiated onto the container; a determination unit that determines the ventilation performance of the internal space while the hydrogen equipment is in operation, A ventilation performance determination system for a hydrogen equipment container, wherein the determination unit determines the ventilation performance of the internal space based on the internal temperature measured by the internal temperature measuring device, the external temperature measured by the external temperature measuring device, and the amount of solar radiation measured by the solar radiation measuring device.

2. 2. The ventilation performance determination system for a hydrogen equipment container as described in claim 1, wherein the determination unit stores a stop-time temperature difference between the internal temperature and the external temperature when operation of the hydrogen equipment is stopped in association with the amount of solar radiation, and determines the ventilation performance by comparing the determination-time temperature difference between the internal temperature and the external temperature measured at the time of determination with the stop-time temperature difference corresponding to the amount of solar radiation measured at the time of determination.

3. The ventilation performance determination system for a hydrogen equipment container as described in claim 2, wherein the determination unit expresses the temperature difference at stop as the internal temperature minus the external temperature when operation is stopped, and when the temperature difference at judgment is expressed as the internal temperature minus the external temperature at the time of judgment, determines that the ventilation performance has deteriorated if a value obtained by subtracting the temperature difference at stop from the temperature difference at judgment is greater than a predetermined threshold value.

4. 4. The ventilation performance determination system for a hydrogen equipment container according to claim 3, wherein the determination unit determines that the ventilation performance has deteriorated when a value obtained by subtracting the temperature difference at the time of shutdown from the temperature difference at the time of determination exceeds a predetermined threshold value multiple times.

5. 2. The ventilation performance determination system for a hydrogen equipment container as described in claim 1, wherein the determination unit stores a normal temperature difference between the internal temperature and the external temperature during normal operation when the ventilation performance is normal, in association with the amount of solar radiation, and determines the ventilation performance by comparing the determination-time temperature difference between the internal temperature and the external temperature measured at the time of determination with the normal temperature difference corresponding to the amount of solar radiation measured at the time of determination.

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