WO2024202389A1 - Enclosure for power generation unit and power generation set - Google Patents

Abstract

This enclosure for a power generation unit is for accommodating a power generation unit that includes a power generator and a drive device which generates a driving force for rotational driving of the power generator by burning fuel, said enclosure comprising: an enclosure body part that includes a base part on which the power generation unit is mounted, a side wall part which is provided on the base part so as to surround the power generation unit, and a roof part which is provided above the side wall part; an air supply port that is for taking air into an internal space of the enclosure body part surrounded by the base part, the side wall part, and the roof part; an exhaust port that is for discharging air from the internal space; and a push-type ventilation fan that is configured to push air into the internal space of the enclosure body part, wherein the air pushed from the ventilation fan is guided to the internal space via an upper end of the side wall part, and the ventilation fan is provided below the upper end of the side wall part.

Description

Enclosures for generating units and generating sets

The present disclosure relates to an enclosure for a power generating unit and a generating set.
This application claims priority based on Japanese Patent Application No. 2023-050486, filed with the Japan Patent Office on March 27, 2023, the contents of which are incorporated herein by reference.

A transportable generating set has been proposed that houses a generator and a device for driving the generator inside an enclosure.

For example, Patent Document 1 discloses a packaged power generation device that houses a generator, an engine for driving the generator, and a fan for supplying air from the outside to the inside of the package inside a package (enclosure).

JP 2011-202523 A

Since ventilation fans contain rotating parts and electric motors, sparks can occur in the ventilation fan due to static electricity, etc. If fuel gas leaks inside the enclosure and the concentration becomes locally high near the ventilation fan, sparks generated by the ventilation fan can become an ignition source, which can lead to a combustion explosion. There is a strong need to reduce such risks, particularly when using easily flammable fuels such as hydrogen.

In view of the above, at least one embodiment of the present invention aims to provide an enclosure for a power generation unit and a power generation set that can effectively reduce the risk of combustion explosion due to fuel gas leakage.

At least one embodiment of the present invention relates to an enclosure for a power generating unit, comprising:
1. An enclosure for housing a power generating unit including a generator and a drive device for combusting fuel to generate a driving force for rotating the generator, the enclosure comprising:
A base portion on which the power generation unit is placed; and
a side wall portion provided on the base portion so as to surround the power generation unit;
A roof portion provided above the side wall portion;
an enclosure body including:
an air intake port for taking in air into an internal space of the enclosure main body surrounded by the foundation portion, the side wall portion, and the roof portion;
an exhaust port for discharging air from the internal space;
A forced draft ventilation fan configured to force air into an internal space of the enclosure body;
Equipped with
The air forced in from the ventilation fan is guided into the internal space through the upper end of the side wall portion,
The ventilation fan is provided below the upper end of the side wall portion.

Moreover, at least one embodiment of the power generating set according to the present invention comprises:
A power generation unit including a generator and a drive device for generating a driving force for rotating the generator by burning fuel;
an enclosure for the power generating unit as described above for housing the power generating unit;
Equipped with.

At least one embodiment of the present invention provides an enclosure for a power generating unit and a power generating set that can effectively reduce the risk of combustion explosion due to fuel gas leakage.

1 is a schematic cross-sectional view of a power generating set according to an embodiment, seen from the side; 2 is a schematic cross-sectional plan view of the power generating set shown in FIG. 1 . FIG. 2 is a perspective view showing the external appearance of a portion of the power generating set shown in FIG. 1 . FIG. 2 is an enlarged view of a portion of the power generating set shown in FIG. 1 . FIG. 3 is an enlarged view of a portion of the power generating set shown in FIG. 2 .

Below, several embodiments of the present invention will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described as the embodiments or shown in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples.

FIG. 1 is a schematic cross-sectional view of a power generation set according to one embodiment, viewed from the side. FIG. 2 is a schematic cross-sectional view of the power generation set shown in FIG. 1, viewed from above. FIG. 3 is a perspective view showing the exterior of a portion of the power generation set shown in FIG. 1.

As shown in Figures 1 and 2, a power generation set 1 according to one embodiment includes a power generation unit 10 including a generator 38 and a drive unit 35, and an enclosure 2 for housing the power generation unit 10. The power generation set 1 shown in Figures 1 and 2 also includes an exhaust section 4 for exhausting combustion exhaust gas from the drive unit 35 outside the enclosure 2.

The generator 38 includes a rotor that is connected to the output shaft of the drive unit 35 and is configured to be rotationally driven by the drive unit 35.

The drive device 35 is configured to combust fuel to generate a drive force that rotates and drives the generator 38. The drive device 35 may be, for example, an internal combustion engine such as a reciprocating engine or a gas turbine engine. In the exemplary embodiment shown in Figures 1 and 2, the drive device 35 is a reciprocating engine 36 that includes a combustion chamber 40 that includes one or more cylinders and a crankcase 42 that houses a rotating shaft. The engine 36 is provided with a turbocharger 44.

The fuel burned in the drive unit 35 may be a gas that is lighter than air, such as hydrogen gas.

The drive unit 35 includes an air intake duct 48 for directing air inside the enclosure 2 to the combustion chamber 40, a fuel pipe 52 for directing fuel gas to the combustion chamber 40, and an exhaust pipe 50 for discharging combustion exhaust gas from the combustion chamber 40. An air intake filter 46 is provided at the inlet of the air intake duct 48. The fuel pipe 52 includes an internal pipe section 54 provided inside the enclosure 2, and an external pipe section 56 provided outside the enclosure 2.

As shown in Figs. 1 and 2, the internal piping section 54 may be provided with one or more valves 57 for adjusting the flow of fuel gas in the internal piping section 54. The one or more valves 57 may include a shutoff valve 58. As shown in Figs. 1 and 2, the valves 57 may be supported by a frame (valve skid) 60 (60A, 60B) provided inside the enclosure 2.

As shown in Figures 1 to 3, the enclosure 2 includes an enclosure body 8 for housing the power generation unit 10, an air intake port 12 for taking in air into the internal space of the enclosure body 8, and an exhaust port 14 for discharging air from the internal space of the enclosure body 8.

The enclosure body 8 includes a base 16 on which the power generating unit 10 is placed, a side wall 18 provided on the base 16 to surround the power generating unit 10, and a roof 24 provided above the side wall 18 to cover the power generating unit 10. The internal space of the enclosure body 8 is a space surrounded by the base 16, the side wall 18, and the roof 24. In the exemplary embodiment shown in Figures 1 to 3, the side wall 18 includes a pair of long portions 19 extending along the longitudinal direction of the enclosure body 8, and a short portion (an intake side portion 20 and an exhaust side portion 22 described later) that connects the pair of long portions 19 to each other. The output shaft of the drive unit 35 or the rotation axis of the generator 38 may be provided to extend along the longitudinal direction of the enclosure body 8.

In the exemplary embodiment shown in Figures 1 to 3, the enclosure 2 includes an air intake hood 30 that is provided on the outside of the enclosure body 8 and forms the air intake 12. Air that enters the enclosure 2 from the air intake 12 is introduced into the internal space of the enclosure body 8 through an inlet opening 26 of the enclosure body 8. As shown in Figures 1 to 3, the inlet opening 26 may be at least partially formed by the upper end 20a of the air intake side portion 20 of the sidewall 18 and the lower surface 25 of the roof 24.

In the exemplary embodiment shown in Figures 1 to 3, the enclosure 2 includes an exhaust duct 32 that is provided on the outside of the enclosure body 8 and forms the exhaust port 14. Air inside the enclosure body 8 is guided to the exhaust duct 32 via the outlet opening 28 of the enclosure body 8 and is exhausted to the outside of the enclosure 2 through the exhaust port 14. As shown in Figures 1 to 3, the outlet opening 28 may be at least partially formed by the upper end 22a of the exhaust side portion 22 of the sidewall 18 and the lower surface 25 of the roof 24.

As shown in Figures 1 to 3, the enclosure 2 may be provided with a ventilation fan 34 for ventilating the inside of the enclosure 2. In other words, the ventilation fan 34 may be configured to introduce outside air into the inside of the enclosure 2 and exhaust the air inside the enclosure 2 to the outside.

As shown in Figures 1 and 2, a partition plate 37 may be provided in the internal space of the enclosure 2 at a position between the air intake 12 and the exhaust 14 in a plan view. The partition plate 37 may have a portion that extends at least partially in the vertical direction, and may guide the air introduced into the internal space of the enclosure 2 from the air intake 12 to flow downward. The partition plate 37 shown in Figure 1 includes a lower end portion that extends in the vertical direction. The partition plate 37 shown in Figure 1 also includes an upper end portion that has a curved shape that approaches the inlet opening 26 as it extends upward.

As shown in Figures 1 and 2, a partition plate 29 may be provided in the internal space of the enclosure 2 at a position between the air intake duct 48 and the internal piping section 54 (fuel piping 52) in a plan view. The partition plate 29 may be provided so as to extend along the vertical direction. The partition plate 29 may be provided across an area including the air intake duct 48 and the internal piping section 54 in the vertical direction.

The exhaust section 4 includes a silencer 78 provided outside the enclosure 2, and a connection pipe section 72 for directing the combustion exhaust gas from the drive unit 35 to the silencer 78. The exhaust section 4 also includes an outlet piping section 80 connected to the silencer 78. The combustion exhaust gas from the silencer 78 is discharged into the atmosphere through an outlet opening 82 of the outlet piping section 80. The silencer 78 shown in FIG. 1 is supported by a support stand 84.

As shown in FIG. 1, the exhaust section 4 including the silencer 78 is provided on a foundation section 70. The foundation section 70 may be separate from the foundation section 16 on which the enclosure 2 is provided. In this case, the foundation section 16 on which the enclosure 2 is provided and the foundation section 70 on which the exhaust section 4 is provided can be transported separately, for example by being loaded onto separate vehicles.

Below, the enclosure 2 and the power generating set 1 according to some embodiments will be described in more detail with reference to Figures 4 and 5. Figures 4 and 5 are enlarged views of a portion of the power generating set shown in Figures 1 and 2.

In some embodiments, as shown in FIG. 4, for example, the lower surface 25 of the roof portion 24 of the enclosure main body 8 includes a sloped portion 23 that has an upward slope toward the exhaust port 14. That is, in the sloped portion 23, the vertical position of the lower surface 25 becomes higher as it approaches the exhaust port 14.

In the above embodiment, the underside 25 of the roof portion 24 forming the enclosure main body 8 includes a sloped portion 23 with an upward slope toward the exhaust port 14. Therefore, even if fuel gas leakage occurs in the internal space of the enclosure main body 8 when the power generation unit 10 is operating or stopped, the lightweight fuel gas that rises in the internal space and reaches the underside 25 of the roof portion 24 can be smoothly flowed along the sloped portion 23 with an upward slope toward the exhaust port 14 and discharged outside the enclosure 2 through the exhaust port 14. Thus, according to the above embodiment, it is possible to suppress the retention of leaked fuel gas inside the enclosure 2, so that the risk of combustion explosion can be effectively reduced even if fuel gas leaks.

In some embodiments, as shown in FIG. 4, for example, the sloped portion 23 includes the highest point of the underside 25 of the roof portion 24. In the exemplary embodiment shown in FIG. 4, the end 25b of the underside 25 of the roof portion 24 that is located on the exhaust port 14 side is located at the highest point. In addition, the end 25b of the underside 25 of the roof portion 24 that is on the exhaust port 14 side forms the outlet opening 28 of the enclosure body portion 8.

In the above-described embodiment, the inclined portion 23 includes the highest point of the underside 25 of the roof portion 24. That is, the underside 25 of the roof portion 24 has an upward slope up to its highest point, so that the lightweight fuel gas that rises through the internal space of the enclosure main body 8 and reaches the underside 25 of the roof portion 24 can flow more smoothly toward the exhaust port 14 along the upwardly sloping inclined portion 23 up to the highest point of the underside 25 of the roof portion 24. Therefore, according to the above-described embodiment, it is possible to more effectively prevent the leaked fuel gas from accumulating inside the enclosure 2, and it is possible to effectively reduce the risk of a combustion explosion even if fuel gas leaks.

In some embodiments, as shown in FIG. 4, for example, the sloped portion 23 extends from the end 25a of the underside 25 of the roof portion 24 on the side of the intake port 12 to the end 25b on the side of the exhaust port 14. In the exemplary embodiment shown in FIG. 4, the end 25a of the underside 25 of the roof portion 24 on the side of the intake port 12 forms the inlet opening 26 of the enclosure body portion 8.

In the above-described embodiment, the inclined portion 23 has an upward gradient from the end 25a on the underside 25 of the roof portion 24 on the intake port 12 side to the end 25b on the exhaust port 14 side, so that the lightweight fuel gas that rises through the internal space of the enclosure main body 8 and reaches the underside 25 of the roof portion 24 can flow more smoothly toward the exhaust port 14 along the upwardly sloping inclined portion 23. Therefore, according to the above-described embodiment, it is possible to more effectively prevent leaked fuel gas from accumulating inside the enclosure 2, and it is possible to effectively reduce the risk of a combustion explosion even if fuel gas leaks.

In some embodiments, the above-mentioned inclined portion 23 comprises a smooth surface. The smooth surface forming the inclined portion 23 may include a flat surface and/or a curved surface.

In the above-described embodiment, the inclined portion 23 of the underside 25 of the roof portion 24 is a smooth surface. That is, the underside 25 of the roof portion 24 does not have any protruding or recessed portions in a direction intersecting the inclined portion 23 (for example, a direction perpendicular to the inclined portion 23), so that the lightweight fuel gas that rises through the internal space of the enclosure main body 8 and reaches the underside 25 of the roof portion 24 can flow more smoothly along the inclined portion 23, which has an upward slope, toward the exhaust port 14. Therefore, according to the above-described embodiment, it is possible to more effectively prevent the leaked fuel gas from accumulating inside the enclosure 2, and it is possible to effectively reduce the risk of a combustion explosion even if the fuel gas leaks.

In some embodiments, the exhaust port 14 is located above the highest point of the underside 25 of the roof portion 24. For example, in the exemplary embodiment shown in FIG. 4, the exhaust duct 32 has a ceiling portion 33 located above the underside 25 of the roof portion 24 of the enclosure body portion 8, and the exhaust port 14 is provided in the ceiling portion 33.

In the above-described embodiment, the exhaust port 14 is located above the highest point of the underside 25 of the roof portion 24, so that the fuel gas that flows toward the exhaust port 14 along the inclined portion 23 with an upward gradient rises further from the highest point of the underside 25 of the roof portion 24 and is smoothly discharged from the exhaust port 14. This makes it possible to more effectively prevent the leaked fuel gas from accumulating inside the enclosure 2, and effectively reduces the risk of a combustion explosion even if fuel gas leaks.

In some embodiments, as shown in Figures 4 and 5, for example, the partition plate 37 provided in the internal space of the enclosure main body 8 is at least partially provided at a position above the generator 38 and the drive unit 35, and between the air intake 12 and the exhaust 14 in a plan view. A gap 39 is formed between the upper end 37a of the partition plate 37 and the lower surface 25 of the roof portion 24.

In the above embodiment, a partition plate 37 is provided that divides the inside of the enclosure main body 8 into a space on the air intake port 12 side and a space on the exhaust port 14 side, and a gap 39 is formed between the partition plate 37 and the underside 25 of the roof portion 24. Therefore, an air flow is formed from the air intake port 12 toward the exhaust port 14 along the underside 25 of the roof portion 24 via this gap 39, making it easier to flow leaked fuel gas toward the exhaust port 14 together with the air flow. This makes it possible to more effectively prevent the leaked fuel gas from accumulating inside the enclosure 2, and effectively reduce the risk of a combustion explosion even if fuel gas leaks.

In some embodiments, in a plan view, the combustion chamber 40 of the drive device 35 is located closer to the exhaust port 14 than the generator 38. In other words, in some embodiments, in a plan view, the distance between the exhaust port 14 and the combustion chamber 40 of the drive device 35 is shorter than the distance between the exhaust port 14 and the generator 38.

In the above-described embodiment, the combustion chamber 40 of the drive unit 35, which may leak fuel gas, is located relatively close to the exhaust port 14. Therefore, even if fuel gas leaks from the combustion chamber 40 of the drive unit 35, the lightweight fuel gas that rises through the internal space of the enclosure 2 and reaches the underside 25 of the roof portion 24 can be smoothly guided along the upwardly sloping portion 23 toward the exhaust port 14 and discharged to the outside of the enclosure 2 via the exhaust port 14. In this way, according to the above-described embodiment, it is possible to prevent the fuel gas leaking from the combustion chamber 40 of the drive unit 35 from accumulating inside the enclosure 2, so that the risk of a combustion explosion can be effectively reduced even if fuel gas leaks.

In some embodiments, in a plan view, the inlet 47 of the intake duct 48 (in the illustrated example, the inlet of the intake filter 46) is located closer to the intake port 12 than the combustion chamber 40 of the drive device 35. In other words, in some embodiments, in a plan view, the distance between the intake port 12 and the inlet 47 of the intake duct 48 is shorter than the distance between the intake port 12 and the combustion chamber 40 of the drive device 35.

In the above embodiment, the inlet of the air intake duct 48 is positioned relatively close to the air intake port 12, so that even if fuel gas leaks from the combustion chamber 40 of the drive unit 35, the leaked fuel gas is unlikely to enter the air intake duct 48 through the inlet 47 of the air intake duct 48. This makes it possible to prevent leaked fuel gas from unintentionally staying in the air intake duct 48, etc., and effectively reduces the risk of combustion explosion in the air intake duct 48, etc.

In some embodiments, the ventilation fan 34 includes a push-type ventilation fan configured to push air outside the enclosure 2 into the interior space of the enclosure body portion 8.

In the above-described embodiment, a push-type ventilation fan that pushes air outside the enclosure 2 into the inside of the enclosure is provided as the ventilation fan 34. Therefore, compared to the case where a suction-type ventilation fan is used that sucks in air inside the enclosure and expels it to the outside, fuel gas leaked inside the enclosure 2 is less likely to come into contact with the ventilation fan, which can be a source of ignition (sparks, etc.). Therefore, even if fuel gas leaks inside the enclosure 2, the risk of combustion and explosion can be effectively reduced.

In some embodiments, the forced ventilation fan 34 is provided outside the enclosure main body 8, below the upper end of the side wall 18 (in the illustrated example, the upper end 20a of the intake side portion 20 of the side wall 18). The air forced in from the ventilation fan 34 is guided into the internal space of the enclosure main body 8 via the upper end of the side wall 18 (the upper end 20a of the intake side portion 20).

Generally, ventilation fans contain rotating parts and electric motors, and therefore sparks can occur in the ventilation fan due to static electricity, etc. If fuel gas leaks inside the enclosure and the concentration becomes high locally near the ventilation fan, sparks generated by the ventilation fan can become an ignition source, which can lead to a combustion explosion. There is a strong need to reduce such risks, particularly when using easily flammable fuels such as hydrogen.

In this regard, in the above-described embodiment, the push-in type ventilation fan 34 that pushes air outside the enclosure 2 into the interior of the enclosure 2 is provided below the upper end (upper end 20a of the air intake side portion 20) of the side wall portion 18 of the enclosure main body portion 8, and the air pushed in from the ventilation fan 34 is guided into the internal space of the enclosure main body portion 8 via the upper end (upper end 20a of the air intake side portion 20) of the side wall portion 18. For this reason, compared to the case where a suction type ventilation fan is used that sucks in air inside the enclosure and exhausts it to the outside, fuel gas leaked inside the enclosure 2 is less likely to come into contact with the ventilation fan 34, which could be a source of ignition (sparks, etc.). In addition, it is unlikely that light fuel gas leaking inside the enclosure 2 will climb over the upper end of the side wall 18 (upper end 20a of the air intake side portion 20) and enter an area below the upper end of the side wall 18 (upper end 20a of the air intake side portion 20) on the outside of the enclosure main body 8. Therefore, according to the above-described embodiment, even if fuel gas leaks inside the enclosure 2, the risk of combustion explosion can be effectively reduced.

In some embodiments, the forced ventilation fan 34 is installed so that it is located lower than the combustion chamber 40 of the drive unit 35 in the vertical direction.

In the above embodiment, the push-in ventilation fan 34 is located below the combustion chamber 40 of the drive unit 35, so even if fuel gas leaks from the combustion chamber 40, the lightweight fuel gas rises from the combustion chamber 40 and is unlikely to come into contact with the ventilation fan 34. Therefore, even if fuel gas leaks from the combustion chamber 40 of the drive unit 35 inside the enclosure 2, the risk of combustion explosion can be effectively reduced.

In some embodiments, the forced draft ventilation fan 34 is installed so as to be located vertically below the fuel pipe 52 (internal pipe section 54 and/or external pipe section 56) that guides fuel to the combustion chamber 40 of the drive unit 35.

In the above-described embodiment, the ventilation fan 34 is located below the internal piping section 54 and/or external piping section 56 for directing fuel gas to the combustion chamber 40 of the drive unit 35. Therefore, even if fuel gas leaks from the fuel piping 52, the lightweight fuel gas rises from the fuel piping 52 and is unlikely to come into contact with the ventilation fan 34. Therefore, even if fuel gas leaks from the fuel piping 52, the risk of combustion explosion can be effectively reduced.

In some embodiments, the forced-force ventilation fan 34 is provided outside the enclosure body 8 and inside the air intake hood 30 that forms the air intake 12.

According to the above-described embodiment, a ventilation fan 34 is provided inside the air intake hood 30, which is separated from the internal space of the enclosure main body 8 via the side wall 18 (the air intake side portion 20 in the illustrated example) of the enclosure main body 8. Therefore, even if fuel gas leaks inside the enclosure main body 8, it is unlikely that the lightweight fuel gas will overcome the upper end of the side wall 18 (the upper end 20a of the air intake side portion 20) and enter the area below the upper end of the side wall 18 (the upper end 20a of the air intake side portion 20) in the air intake hood 30. Therefore, even if fuel gas leaks inside the enclosure 2, the risk of combustion explosion can be effectively reduced.

In some embodiments, the underside 25 of the roof portion 24 includes a sloped portion 23 that increases in height as it moves away from the air intake 12.

In the above embodiment, the lower surface 25 of the roof portion 24 forming the enclosure main body 8 includes an inclined portion 23 whose height increases with distance from the air intake 12. Therefore, even if fuel gas leakage occurs in the internal space of the enclosure main body 8 during operation or shutdown of the power generation unit 10, the lightweight fuel gas that rises in the internal space and reaches the lower surface 25 of the roof portion 24 can be made to flow away from the air intake 12 along the inclined portion 23 having an upward gradient. In this way, according to the above embodiment, the leaked fuel gas can be kept away from the ventilation fan 34 provided near the air intake 12, and the leaked fuel gas can be effectively prevented from coming into contact with the ventilation fan 34. Therefore, even if fuel gas leaks inside the enclosure 2, the risk of combustion explosion can be more effectively reduced.

In some embodiments, as already mentioned, the partition plate 37 provided in the internal space of the enclosure main body 8 is provided at least partially at a position above the generator 38 and the drive unit 35 and between the air intake 12 and the exhaust 14 in a plan view, and a gap 39 is formed between the upper end 37a of the partition plate 37 and the lower surface 25 of the roof portion 24.

In the above embodiment, a partition plate 37 is provided to separate the interior of the enclosure main body 8 into a space on the air intake 12 side and a space on the exhaust 14 side, and a gap 39 is formed between the upper end 37a of the partition plate 37 and the underside 25 of the roof 24. Therefore, an air flow is formed from the air intake 12 toward the exhaust 14 along the underside 25 of the roof 24 via this gap 39, making it easier to move leaked fuel gas away from the air intake 12 together with the air flow. This makes it possible to more effectively prevent leaked fuel gas from coming into contact with the ventilation fan 34, and effectively reduce the risk of combustion explosion even if fuel gas leaks.

In some embodiments, the internal piping section 54 provided inside the enclosure main body 8 is provided on the opposite side of the side wall section 18 (the intake side section 20 in the illustrated example) from the ventilation fan 34 in a plan view.

According to the above-described embodiment, the internal piping section 54 for directing fuel to the combustion chamber 40 of the drive unit 35 is provided on the opposite side of the ventilation fan 34 across the side wall section 18 (air intake side section 20) in a plan view. Therefore, even if fuel gas leaks from the internal piping section 54, the fuel gas is unlikely to come into contact with the ventilation fan 34, which is provided on the opposite side of the internal piping section 54 across the side wall section 18 (air intake side section 20). Therefore, even if fuel gas leaks from the internal piping section inside the enclosure, the risk of combustion explosion can be effectively reduced.

In some embodiments, the internal piping section 54 and the external piping section 56 are provided on the opposite side of the ventilation fan 34 across the side wall section 18 (air supply side section 20) in a plan view. Alternatively, the internal piping section 54 and the external piping section 56 are provided on the opposite side of the ventilation fan 34 across the above-mentioned partition plate 37 in a plan view.

According to the above-described embodiment, the internal piping section 54 and the external piping section 56 for directing fuel to the combustion chamber 40 of the drive unit 35 are provided on the side opposite the ventilation fan 34 across the side wall section 18 (air intake side section 20) or the partition plate 37 in a plan view. That is, the internal piping section 54 and the external piping section 56 are provided at a position relatively far from the ventilation fan 34, so that even if fuel gas leaks from the internal piping section 54 or the external piping section 56, the fuel gas is unlikely to come into contact with the ventilation fan 34, which is located relatively far from the internal piping section 54 and the external piping section 56. Therefore, even if fuel gas leaks from the internal piping section 54 or the external piping section 56, the risk of combustion explosion can be effectively reduced.

In some embodiments, a stand 60 (stand 60A or 60B in Figures 4 and 5) for supporting one or more valves 57 provided in the internal piping section 54 is provided on the opposite side of the ventilation fan 34 across the partition plate 37 described above in a plan view.

In the above-described embodiment, a stand 60 for supporting multiple valves 57 provided in the internal piping section 54 from which fuel gas leakage may occur is positioned relatively far from the ventilation fan 34. Therefore, even if fuel gas leaks from a valve 57 supported by the stand 60, the fuel gas is unlikely to come into contact with the ventilation fan 34, which is positioned relatively far from the stand 60. Therefore, even if fuel gas leaks from a valve 57 supported by the stand 60 inside the enclosure 2, the risk of combustion explosion can be effectively reduced.

In some embodiments, in a plan view, the combustion chamber 40 of the drive unit 35 is located farther from the ventilation fan 34 than the generator 38.

In the above-described embodiment, the combustion chamber 40 of the drive device 35, which may have a fuel gas leak, is positioned relatively far from the ventilation fan 34. Therefore, even if fuel gas leaks from the combustion chamber 40 of the drive device 35, the fuel gas is unlikely to come into contact with the ventilation fan 34, which is positioned relatively far from the combustion chamber 40 of the drive device 35. Therefore, even if fuel gas leaks from the combustion chamber 40 of the drive device 35 inside the enclosure 2, the risk of combustion explosion can be effectively reduced.

The contents described in each of the above embodiments can be understood, for example, as follows:

(1) At least one embodiment of the present invention relates to an enclosure for a power generating unit (2),
1. An enclosure for housing a power generating unit including a generator (38) and a drive (35) for combusting fuel to generate a driving force for rotating the generator, comprising:
A base portion (16) on which the power generating unit is placed;
a side wall portion (18) provided on the base portion so as to surround the power generating unit;
A roof portion (24) provided above the side wall portion;
An enclosure body (8) including:
an air intake port (12) for taking in air into an internal space of the enclosure body surrounded by the foundation portion, the side wall portion, and the roof portion;
an exhaust port (14) for discharging air from the interior space;
a forced draft ventilation fan (34) configured to force air into the interior space of the enclosure body;
Equipped with
The air forced in from the ventilation fan is guided to the internal space through the upper end (20a) of the side wall portion (e.g., the above-mentioned intake side portion 20),
The ventilation fan is provided below the upper end of the side wall portion.

In the above configuration (1), a push-in type ventilation fan that pushes air outside the enclosure into the inside of the enclosure is provided below the upper end of the side wall of the enclosure main body, and the air pushed in from the ventilation fan is guided into the internal space of the enclosure main body through the upper end of the side wall. Therefore, compared to the case where a suction type ventilation fan is used that sucks in air inside the enclosure and exhausts it to the outside, fuel gas leaked inside the enclosure is less likely to come into contact with the ventilation fan, which can be a source of ignition (sparks, etc.). In addition, lightweight fuel gas leaked inside the enclosure is less likely to go over the upper end of the side wall and enter the area below the upper end of the side wall on the outside of the enclosure main body. Therefore, according to the above configuration (1), even if fuel gas leaks inside the enclosure, the risk of combustion explosion can be effectively reduced.

(2) In some embodiments, in the configuration of (1),
The ventilation fan is installed so as to be located below the combustion chamber (40) of the drive device.

In the configuration (2) above, the ventilation fan is located below the combustion chamber of the drive unit. Therefore, even if fuel gas leaks from the combustion chamber, the lightweight fuel gas rises from the combustion chamber and is unlikely to come into contact with the ventilation fan. Therefore, even if fuel gas leaks from the combustion chamber of the drive unit inside the enclosure, the risk of combustion explosion can be effectively reduced.

(3) In some embodiments, in the configuration of (1) or (2),
The ventilation fan is installed so as to be located below a fuel pipe (for example, the above-mentioned internal pipe portion 54) for introducing fuel to the combustion chamber of the drive device.

According to the configuration of (3) above, the ventilation fan is positioned below the fuel pipe that guides fuel to the combustion chamber of the drive unit. Therefore, even if fuel gas leaks from the fuel pipe, the lightweight fuel gas rises from the fuel pipe and is unlikely to come into contact with the ventilation fan. Therefore, even if fuel gas leaks from the fuel pipe inside the enclosure, the risk of combustion explosion can be effectively reduced.

(4) In some embodiments, in any one of the configurations (1) to (3) above,
The power generation unit enclosure comprises:
an air supply hood (30) provided on the outside of the enclosure main body and forming the air supply port;
The ventilation fan is provided inside the air supply hood.

According to the above configuration (4), a ventilation fan is provided inside the air intake hood, which is separated from the internal space of the enclosure main body via the side wall of the enclosure main body. Therefore, even if fuel gas leaks inside the enclosure main body, it is unlikely that the lightweight fuel gas will climb over the upper end of the side wall and enter the area below the upper end of the side wall within the air intake hood. Therefore, even if fuel gas leaks inside the enclosure, the risk of combustion explosion can be effectively reduced.

(5) In some embodiments, in any one of the configurations (1) to (4) above,
The underside of the roof portion includes an inclined portion (23) whose height increases with increasing distance from the air supply port.

In the above configuration (5), the underside of the roof forming the enclosure main body includes an inclined portion that increases in height as it moves away from the air intake port. Therefore, even if fuel gas leaks from the internal space of the enclosure main body while the power generation unit is in operation or stopped, the lightweight fuel gas that rises through the internal space and reaches the underside of the roof can be directed away from the air intake port along the upwardly sloping inclined portion. In this way, according to the above configuration (5), the leaked fuel gas can be directed away from the ventilation fan installed near the air intake port, and the leaked fuel gas can be effectively prevented from coming into contact with the ventilation fan. Therefore, even if fuel gas leaks inside the enclosure, the risk of combustion explosion can be more effectively reduced.

(6) In some embodiments, in the configuration of (5),
The power generation unit enclosure comprises:
a partition plate (37) that is at least partially provided in an internal space of the enclosure main body, above the generator and the drive device, and between the air intake port and the air exhaust port in a plan view, and that extends at least partially along a vertical direction;
A gap (39) is formed between the upper end (37a) of the partition plate and the lower surface of the roof portion.

In the above configuration (6), a partition plate is provided that divides the inside of the enclosure main body into a space on the intake port side and a space on the exhaust port side, and a gap is formed between the partition plate and the underside of the roof. Therefore, an air flow is formed along the underside of the roof portion from the intake port to the exhaust port through this gap, making it easier to move leaked fuel gas away from the intake port together with the air flow. This makes it possible to more effectively prevent leaked fuel gas from coming into contact with the ventilation fan, and effectively reduces the risk of combustion explosion even if fuel gas leaks.

(7) In some embodiments, in any one of the configurations (1) to (6) above,
The power generation unit enclosure comprises:
Of the fuel piping (52) for directing fuel to the combustion chamber of the drive device, an internal piping section (54) provided inside the enclosure main body is configured to be provided on the opposite side of the ventilation fan across the side wall section in a plan view.

According to the above configuration (7), the internal piping section for directing fuel to the combustion chamber of the drive unit is provided on the opposite side of the side wall from the ventilation fan in a plan view, so that even if fuel gas leaks from the internal piping section, the fuel gas is unlikely to come into contact with the ventilation fan provided on the opposite side of the internal piping section across the side wall. Therefore, even if fuel gas leaks from the internal piping section inside the enclosure, the risk of combustion explosion can be effectively reduced.

(8) In some embodiments, in the configuration of (7),
The fuel pipe includes the internal pipe section and an external pipe section (56) provided outside the enclosure main body section,
The power generation unit enclosure comprises:
The internal piping section and the external piping section are configured to be provided on the opposite side of the side wall section from the ventilation fan in a plan view.

According to the above configuration (8), the internal piping section and the external piping section for directing fuel to the combustion chamber of the drive unit are provided on the opposite side of the ventilation fan across the side wall section in a plan view. In other words, since the internal piping section and the external piping section are provided at a position relatively far from the ventilation fan, even if fuel gas leaks from the internal piping section or the external piping section, the fuel gas is unlikely to come into contact with the ventilation fan, which is located relatively far from the internal piping section and the external piping section. Therefore, even if fuel gas leaks from the internal piping section or the external piping section, the risk of combustion explosion can be effectively reduced.

(9) At least one embodiment of the power generating set (1) of the present invention comprises:
A power generation unit (10) including a generator and a drive device for burning fuel to generate a driving force for rotating the generator;
An enclosure (2) for a power generation unit according to any one of (1) to (8) above for accommodating the power generation unit;
Equipped with.

In the above configuration (9), a push-in type ventilation fan that pushes air outside the enclosure into the inside of the enclosure is provided below the upper end of the side wall of the enclosure main body, and the air pushed in from the ventilation fan is guided to the internal space of the enclosure main body through the upper end of the side wall. That is, the ventilation fan is provided below the upper end of the side wall on the outside of the enclosure main body. Therefore, compared to the case where a suction type ventilation fan is used that sucks in air inside the enclosure and exhausts it to the outside, fuel gas leaked inside the enclosure is less likely to come into contact with the ventilation fan, which can be a source of ignition (sparks, etc.). In addition, it is less likely that lightweight fuel gas leaked inside the enclosure will go over the upper end of the side wall and enter the area below the upper end of the side wall on the outside of the enclosure main body. Therefore, according to the above configuration (9), even if fuel gas leaks inside the enclosure, the risk of combustion explosion can be effectively reduced.

(10) In some embodiments, in the configuration of (9),
The generating set includes:
A valve (57) provided in an internal piping portion provided inside the enclosure main body of a fuel piping for introducing fuel to a combustion chamber of the drive device;
A stand (60) for supporting the valve;
a partition plate (37) that is provided in an internal space of the enclosure main body at a position between the air supply port and the air exhaust port in a plan view and that extends at least partially along a vertical direction;
Equipped with
In a plan view, the stand is provided on the opposite side of the partition plate from the ventilation fan.

In the above configuration (10), the stand for supporting multiple valves installed in the internal piping section where fuel gas leakage is possible is positioned relatively far from the ventilation fan. Therefore, even if fuel gas leaks from a valve supported by the stand, the fuel gas is unlikely to come into contact with the ventilation fan located relatively far from the stand. Therefore, even if fuel gas leaks from a valve supported by the stand inside the enclosure, the risk of combustion explosion can be effectively reduced.

(11) In some embodiments, in the configuration of (9) or (10),
In plan view, the combustion chamber (40) of the drive unit is located farther from the ventilation fan than the generator.

In the above configuration (11), the combustion chamber of the drive unit, which may have fuel gas leakage, is located relatively far from the ventilation fan. Therefore, even if fuel gas leaks from the combustion chamber of the drive unit, the fuel gas is unlikely to come into contact with the ventilation fan, which is located relatively far from the combustion chamber of the drive unit. Therefore, even if fuel gas leaks from the combustion chamber of the drive unit inside the enclosure, the risk of combustion explosion can be effectively reduced.

The above describes an embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and also includes modifications to the above-described embodiment and appropriate combinations of these embodiments.

In this specification, expressions expressing relative or absolute configuration, such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""center,""concentric," or "coaxial," do not only strictly represent such a configuration, but also represent a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained.
For example, expressions indicating that things are in an equal state, such as "identical,""equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained.
Furthermore, in this specification, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to shapes such as a rectangular shape or a cylindrical shape in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained.
In addition, in this specification, the expressions "comprise,""include," or "have" a certain element are not exclusive expressions that exclude the presence of other elements.

LIST OF SYMBOLS 1 Power generating set 2 Enclosure 4 Exhaust section 8 Enclosure main body 10 Power generating unit 12 Air intake port 14 Exhaust port 16 Foundation section 18 Side wall section 19 Long section 20 Air intake side section 20a Upper end 22 Exhaust side section 22a Upper end 23 Inclined section 24 Roof section 25 Lower surface 25a End 25b End 26 Inlet opening 28 Outlet opening 29 Partition plate 30 Air intake hood 32 Exhaust duct 33 Ceiling section 34 Ventilation fan 35 Drive unit 36 Engine 37 Partition plate 37a Upper end 38 Generator 39 Gap 40 Combustion chamber 42 Crankcase 44 Turbocharger 46 Air intake filter 47 Inlet 48 Air intake duct 50 Exhaust piping 52 Fuel piping 54 Internal piping section 56 External piping section 57 Valve 58 Shutoff valve 60 Frame 60A Frame 60B Frame 70 Foundation 72 Connection pipe 78 Silencer 80 Outlet pipe 82 Outlet opening 84 Support

Claims (11)

1. An enclosure for housing a power generating unit including a generator and a drive device for combusting fuel to generate a driving force for rotating the generator, the enclosure comprising:
A base portion on which the power generation unit is placed; and
a side wall portion provided on the base portion so as to surround the power generation unit;
A roof portion provided above the side wall portion;
an enclosure body including:
an air intake port for taking in air into an internal space of the enclosure main body surrounded by the foundation portion, the side wall portion, and the roof portion;
an exhaust port for discharging air from the internal space;
A forced draft ventilation fan configured to force air into an internal space of the enclosure body;
Equipped with
The air forced in from the ventilation fan is guided into the internal space through the upper end of the side wall portion,
The ventilation fan is disposed below the upper end of the side wall of the power generation unit enclosure. 2. The enclosure for a power generating unit according to claim 1, wherein the ventilation fan is installed so as to be located lower than a combustion chamber of the driving device. 3. The enclosure for a power generating unit according to claim 1, wherein the ventilation fan is installed so as to be located lower than a fuel pipe for introducing fuel to a combustion chamber of the drive device. an air supply hood provided on the outside of the enclosure main body and forming the air supply port;
3. The enclosure for a power generation unit according to claim 1, wherein the ventilation fan is provided inside the air supply hood. 3. The enclosure for a power generating unit according to claim 1, wherein the lower surface of the roof portion includes an inclined portion whose height increases with increasing distance from the air supply port. a partition plate that is at least partially provided in an internal space of the enclosure main body, above the generator and the drive device, and between the air intake port and the air exhaust port in a plan view, and that extends at least partially along a vertical direction;
6. The power generating unit enclosure according to claim 5, wherein a gap is formed between an upper end of the partition plate and the lower surface of the roof portion. 3. An enclosure for a power generation unit as described in claim 1 or 2, wherein an internal piping section of a fuel piping for directing fuel to a combustion chamber of the drive device, which is provided inside the enclosure main body, is configured to be provided on the opposite side of the ventilation fan across the side wall section when viewed in a plan view. the fuel pipe includes the internal pipe section and an external pipe section provided outside the enclosure main body section,
The enclosure for a power generation unit according to claim 7 , wherein the internal piping section and the external piping section are arranged on an opposite side of the side wall section from the ventilation fan in a plan view. A power generation unit including a generator and a drive device for generating a driving force for rotating the generator by burning fuel;
A power generating unit enclosure according to claim 1 or 2 for housing the power generating unit;
A generating set comprising: a valve provided in an internal piping portion provided inside the enclosure main body, the internal piping portion being a fuel piping portion for introducing fuel into a combustion chamber of the drive device;
A stand for supporting the valve;
a partition plate that is at least partially provided in an internal space of the enclosure main body at a position between the air supply port and the air exhaust port in a plan view and that extends at least partially along a vertical direction;
Equipped with
The power generating set according to claim 9 , wherein, in a plan view, the frame is provided on an opposite side of the partition plate from the ventilation fan. The power generating set according to claim 9 , wherein, in a plan view, a combustion chamber of the driving device is located farther from the ventilation fan than the generator.

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