Power generation set

Abstract

This power generation set comprises: a power generation unit that includes a power generator and a drive device for combusting fuel to generate a drive force for rotationally driving the power generator; an enclosure that accommodates the power generation unit; and a discharge part for discharging exhaust gas from the drive device to the outside of the enclosure. The discharge part includes a muffler provided outside of the enclosure, and a connection piping part for guiding the exhaust gas from the drive device to the muffler. At all positions in the flow direction of the exhaust gas, the connection piping part has an upward inclination angle of 0 degrees or greater in the flow direction relative to the horizontal direction.

Description

Technical Field

[0001] The present disclosure relates to a power generation set.

[0002] The present application claims priority based on Japanese Patent Application No. 2023-050470 filed in Japan on March 27, 2023, the contents of which are incorporated herein by reference.Background Art

[0003] A transportable power generation set that accommodates a generator, a device for driving the generator, and the like inside an enclosure has been proposed.

[0004] For example, PTL 1 discloses a package-type power generation device in which a generator, an engine for driving the generator, a fuel tank for storing fuel to be supplied to the engine, a silencer into which exhaust gas from the engine is introduced, and the like are accommodated inside a package (enclosure).Citation ListPatent Literature

[0005] [PTL 1] Japanese Unexamined Patent Application Publication No. 2017-180192Summary of InventionTechnical Problem

[0006] Meanwhile, in a drive device (engine or the like) that combusts a fuel, exhaust gas containing unburned components of the fuel may be generated due to ignition failure, misfire, or the like. In this case, in an exhaust unit (exhaust pipe or the like) through which the exhaust gas flows, when a place where the concentration of the unburned component of the fuel is locally high is generated, there is a possibility that combustion explosion may occur due to an ignition source such as a spark. In particular, in a case where a combustible fuel such as hydrogen is used, there is a high need to reduce such a risk. In general, the combustion explosion in the exhaust unit is called a flue gas explosion, a flue gas fire, or the like.

[0007] In view of the above circumstances, an object of at least one embodiment of the present invention is to provide a power generation set capable of effectively reducing a risk of combustion explosion in an exhaust unit.Solution to Problem

[0008] According to at least one embodiment of the present invention, there is provided a power generation set including: a power generation unit that includes a generator and a drive device for generating a driving force for rotationally driving the generator by combusting a fuel; an enclosure that accommodates the power generation unit; and an exhaust unit for exhausting exhaust gas from the drive device to an outside of the enclosure, in which the exhaust unit includes a silencer that is provided outside the enclosure, and a connection pipe portion for guiding the exhaust gas from the drive device to the silencer, and the connection pipe portion has an upward inclination angle of 0 degrees or more in a flow direction of the exhaust gas with respect to a horizontal direction at all positions in the flow direction. Advantageous Effects of Invention

[0009] According to at least one embodiment of the present invention, there is provided a power generation set capable of effectively reducing a risk of combustion explosion in an exhaust unit.Brief Description of Drawings

[0010] FIG. 1 is a schematic cross-sectional view of a power generation set according to an embodiment as viewed from a side. FIG. 2 is a schematic cross-sectional view of the power generation set shown in FIG. 1 as viewed in a plan view. FIG. 3 is a perspective view showing an exterior of a part of the power generation set shown in FIG. 1. FIG. 4 is an enlarged view showing a part of the power generation set shown in FIG. 1. FIG. 5 is an enlarged view showing a part of the power generation set shown in FIG. 2. FIG. 6 is a schematic view showing a part of an exhaust unit of the power generation set according to the embodiment. Description of Embodiments

[0011] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. Dimensions, materials, shapes, relative dispositions, and the like of components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely explanatory examples.

[0012] FIG. 1 is a schematic cross-sectional view of a power generation set according to an embodiment as viewed from a side. FIG. 2 is a schematic cross-sectional view of the power generation set shown in FIG. 1 as viewed in a plan view. FIG. 3 is a perspective view showing an exterior of a part of the power generation set shown in FIG. 1.

[0013] As shown in FIGS. 1 and 2, a power generation set 1 according to the embodiment includes a power generation unit 10 including a generator 38 and a drive device 35, and an enclosure 2 for accommodating the power generation unit 10. In addition, the power generation set 1 shown in FIGS. 1 and 2 includes an exhaust unit 4 for exhausting exhaust gas from the drive device 35 to an outside of the enclosure 2.

[0014] The generator 38 includes a rotor that is connected to an output shaft of the drive device 35, and is rotationally driven by the drive device 35.

[0015] The drive device 35 is configured to generate a driving force for rotationally driving the generator 38 by combusting a fuel. For example, the drive device 35 may be an internal combustion engine such as a reciprocating engine or a gas turbine engine. In the exemplary embodiment shown in FIGS. 1 and 2, the drive device 35 is a reciprocating engine 36 that includes a combustion chamber 40 including one or more cylinders and a crank chamber 42 that accommodates a rotary shaft. A turbocharger 44 is provided in the engine 36.

[0016] The fuel combusted by the drive device 35 may be gas lighter than air, and may be, for example, hydrogen gas.

[0017] The drive device 35 includes an air supply duct 48 for guiding air inside the enclosure 2 to the combustion chamber 40, a fuel pipe 52 for guiding a fuel gas to the combustion chamber 40, and an exhaust pipe 50 for discharging exhaust gas from the combustion chamber 40. An air supply filter 46 is provided at an inlet 47 of the air supply duct 48. The fuel pipe 52 includes an internal pipe portion 54 provided inside the enclosure 2 and an external pipe portion 56 provided outside the enclosure 2.

[0018] As shown in FIGS. 1 and 2, the internal pipe portion 54 may be provided with one or more valves 57 for adjusting the flow of the fuel gas in the internal pipe portion 54. The one or more valves 57 may include a shutoff valve 58. As shown in FIGS. 1 and 2, the valve 57 may be supported by a stand (valve skid) 60 (60A, 60B) provided inside the enclosure 2.

[0019] As shown in FIGS. 1 to 3, the enclosure 2 includes an enclosure body portion 8 for accommodating the power generation unit 10, an air supply port 12 for taking air into an internal space of the enclosure body portion 8, and an exhaust port 14 for discharging air from the internal space of the enclosure body portion 8.

[0020] The enclosure body portion 8 includes a foundation portion 16 on which the power generation unit 10 is placed, a side wall portion 18 provided on the foundation portion 16 to surround the power generation unit 10, and a roof portion 24 provided above the side wall portion 18 to cover the power generation unit 10. The internal space of the enclosure body portion 8 is a space surrounded by the foundation portion 16, the side wall portion 18, and the roof portion 24. In the exemplary embodiments shown in FIGS. 1 to 3, the side wall portion 18 includes a pair of long portions 19 extending along a longitudinal direction of the enclosure body portion 8, and short portions (an air supply side portion 20 and an exhaust side portion 22 to be described later) connecting the pair of long portions 19 to each other. The output shaft of the drive device 35 or the rotary shaft of the generator 38 may be provided to extend along the longitudinal direction of the enclosure body portion 8.

[0021] In the exemplary embodiments shown in FIGS. 1 to 3, the enclosure 2 includes an air supply hood 30 that is provided outside the enclosure body portion 8 and that forms an air supply port 12. The air that has entered the enclosure 2 from the air supply port 12 is introduced into the internal space of the enclosure body portion 8 through an inlet opening 26 of the enclosure body portion 8. As shown in FIGS. 1 to 3, the inlet opening 26 may be at least partially formed by an upper end 20a of the air supply side portion 20 of the side wall portion 18 and a lower surface 25 of the roof portion 24.

[0022] In the exemplary embodiments shown in FIGS. 1 to 3, the enclosure 2 includes an exhaust duct 32 that is provided outside the enclosure body portion 8 and that forms the exhaust port 14. The air inside the enclosure body portion 8 is guided to the exhaust duct 32 through an outlet opening 28 of the enclosure body portion 8, and is discharged from the exhaust port 14 to the outside of the enclosure 2. As shown in FIGS. 1 to 3, the outlet opening 28 may be at least partially formed by an upper end 22a of the exhaust side portion 22 of the side wall portion 18 and the lower surface 25 of the roof portion 24.

[0023] As shown in FIGS. 1 to 3, the enclosure 2 may include a ventilation fan 34 for ventilating the inside of the enclosure 2. That is, the ventilation fan 34 may introduce outside air into the enclosure 2 and discharge the air inside the enclosure 2 to the outside.

[0024] As shown in FIGS. 1 and 2, a partition plate 37 may be provided at a position between the air supply port 12 and the exhaust port 14 in a plan view in the internal space of the enclosure 2. The partition plate 37 may have a portion that extends at least partially along an up-down direction and may be configured to guide the air introduced from the air supply port 12 into the internal space of the enclosure 2 to flow downward. The partition plate 37 shown in FIG. 1 includes a lower end portion extending along the up-down direction. In addition, the partition plate 37 shown in FIG. 1 includes an upper end portion having a shape that is curved to approach the inlet opening 26 as going upward.

[0025] As shown in FIGS. 1 and 2, a partition plate 29 may be provided at a position between the air supply duct 48 and the internal pipe portion 54 (fuel pipe 52) in a plan view in the internal space of the enclosure 2. The partition plate 29 may be provided to extend along the up-down direction. The partition plate 29 may be provided over a region including the air supply duct 48 and the internal pipe portion 54 in the up-down direction.

[0026] The exhaust unit 4 includes a silencer 78 provided outside the enclosure 2, and a connection pipe portion 72 for guiding the exhaust gas from the drive device 35 to the silencer (muffler) 78. In addition, the exhaust unit 4 includes an outlet pipe portion 80 connected to the silencer 78. The connection pipe portion 72 includes an upstream end connected to the exhaust pipe 50 described above and a downstream end connected to the silencer 78. The outlet pipe portion 80 has an upstream end connected to the silencer 78 and an outlet opening 82 provided at a downstream end. The exhaust gas from the silencer 78 is released to the atmosphere through the outlet opening 82 of the outlet pipe portion 80. The silencer 78 shown in FIG. 1 is supported by a support table 84.

[0027] As shown in FIG. 1, the exhaust unit 4 including the silencer 78 is provided on a foundation portion 70. The foundation portion 70 may be different from the foundation portion 16 in which the enclosure 2 is provided. In this case, the foundation portion 16 in which the enclosure 2 is provided and the foundation portion 70 in which the exhaust unit 4 is provided can be separately transported by being loaded on separate vehicles or the like.

[0028] Hereinafter, the power generation set 1 according to some embodiments will be described in more detail with reference to FIGS. 4 to 6. FIGS. 4 and 5 are enlarged views showing a part of the power generation set shown in FIGS. 1 and 2. FIG. 6 is a schematic view showing a part of the exhaust unit 4 of the power generation set according to the embodiment.

[0029] In some embodiments, the connection pipe portion 72 has an upward inclination angle of 0 degrees or more in a flow direction of the exhaust gas with respect to a horizontal direction at all positions in the flow direction of the exhaust gas. In the exemplary embodiment shown in FIGS. 4 and 5, the connection pipe portion 72 has an upward inclination angle of approximately 0 degrees in a flow direction of the fuel with respect to the horizontal direction at all positions in the flow direction. That is, the connection pipe portion 72 is provided along a horizontal plane.

[0030] In the above-described embodiment, the connection pipe portion 72 for guiding the exhaust gas from the drive device 35 to the silencer 78 has the upward inclination angle of 0 degrees or more in the flow direction of the exhaust gas with respect to the horizontal direction at all positions in the flow direction of the exhaust gas. That is, since the connection pipe portion 72 does not have a descending slope and has an ascending slope or extends horizontally to the silencer 78, it is possible to suppress the accumulation of the lightweight unburned fuel gas in the pipe. Therefore, it is possible to suppress a local increase in the fuel gas concentration in the exhaust unit 4 including the connection pipe portion 72, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit 4.

[0031] In some embodiments, the connection pipe portion 72, the silencer 78, and the outlet pipe portion 80 have an upward inclination angle of 0 degrees or more in the flow direction of the exhaust gas with respect to the horizontal direction at all positions in the flow direction of the exhaust gas. In the exemplary embodiment shown in FIGS. 4 and 5, the silencer 78 has an upward inclination angle of approximately 0 degrees in a flow direction of the fuel with respect to the horizontal direction at all positions in the flow direction. In addition, the outlet pipe portion 80 includes a first portion 80a in which the above-described inclination angle is approximately 90 degrees, and a second portion 80b in which the above-described inclination angle is 0 degrees or more and less than 90 degrees.

[0032] According to the above-described embodiment, in addition to the connection pipe portion 72, the silencer 78 and the outlet pipe portion 80 have the upward inclination angle of 0 degrees or more in the flow direction of the exhaust gas with respect to the horizontal direction at all positions in the flow direction of the exhaust gas. That is, since the connection pipe portion 72, the silencer 78, and the outlet pipe portion 80 do not have a descending slope and have an ascending slope or extend horizontally to the outlet opening 82 of the outlet pipe portion 80, it is possible to suppress the accumulation of the lightweight unburned fuel gas inside the pipe or the silencer 78. Therefore, it is possible to suppress a local increase in the fuel gas concentration in the exhaust unit 4, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit 4.

[0033] In some embodiments, the downstream end of the outlet pipe portion 80 has the upward outlet opening 82 with respect to the horizontal direction. That is, in some embodiments, the upward inclination angle θ (refer to FIG. 4) of the center line L1 of the outlet pipe portion 80 with respect to the horizontal direction (straight line LH in FIG. 4) at the outlet opening 82 of the outlet pipe portion 80 is larger than 0 degrees. The inclination angle θ may be 30 degrees or more and 90 degrees or less.

[0034] In the above-described embodiment, since the downstream end of the outlet pipe portion 80 has the upward outlet opening 82 with respect to the horizontal direction, the exhaust gas is less likely to accumulate in the outlet pipe portion 80, and the exhaust gas can be smoothly released to the atmosphere. Therefore, it is possible to suppress a local increase in the unburned fuel gas concentration in the exhaust gas in the outlet pipe portion 80, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit 4.

[0035] In the exemplary embodiment shown in FIGS. 4 and 5, the outlet opening 82 of the outlet pipe portion 80 faces a drive device 35 side, but may face a side opposite to the drive device 35.

[0036] In addition, in a case where the inclination angle θ is close to 90 degrees, there is a possibility that moisture falling from above, such as rainwater, may enter the silencer 78 through the outlet pipe portion 80. However, the moisture that has entered the silencer 78 can be discharged through a drain provided at the bottom portion of the silencer 78.

[0037] In some embodiments, a lower end 78a of the silencer 78 is located above a rotation axis O (refer to FIG. 4) of the drive device 35 in the up-down direction. In the exemplary embodiment shown in FIG. 4, the silencer 78 is supported by the support table 84 located at a position above the rotation axis O of the drive device 35 in the up-down direction.

[0038] According to the above-described embodiment, since the lower end 78a of the silencer 78 is located relatively above, the pipe (connection pipe portion 72) through which the exhaust gas from the drive device 35 flows can be easily extended to the silencer 78 to have an ascending slope or horizontally without having a descending slope. Therefore, it is easy to suppress a local increase in the fuel gas concentration in the exhaust unit 4 including the connection pipe portion 72, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit 4.

[0039] In some embodiments, equipment for operating the power generation unit 10 is installed in a space below the silencer 78. The equipment for operating the power generation unit 10 may include, for example, a fan 86 for discharging the gas in the pipe or an oil tank 88, or may be a cooling water pump.

[0040] According to the above-described embodiment, since the equipment for operating the power generation unit 10 is installed in the space below the silencer 78, the lower end 78a of the silencer 78 is located relatively above. Therefore, the pipe (connection pipe portion 72) through which the exhaust gas from the drive device 35 flows can be easily extended to the silencer 78 to have an ascending slope or horizontally without having a descending slope. In addition, a space formed by providing the silencer 78 at a relatively upper position can be effectively used as an equipment installation space. Therefore, while the power generation set 1 is reduced in size, it is easy to suppress a local increase in the fuel gas concentration in the exhaust unit 4 including the connection pipe portion 72, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit 4.

[0041] In some embodiments, for example, as shown in FIGS. 4 to 6, the connection pipe portion 72 is provided with a drain discharge hole 90 for discharging water in the connection pipe portion 72. The connection pipe portion 72 may be provided with a drain discharge pipe 92 for discharging the water to the outside through the drain discharge hole 90.

[0042] In a case where the inclination angle of the connection pipe portion 72 is set to 0 degrees or more, there is a possibility that the condensed water generated in the pipe (connection pipe portion 72) may flow back to the upstream side (that is, toward the drive device 35). When the condensed water that has flowed back adheres to the drive device 35, it becomes a factor of a malfunction in the drive device 35. In this regard, according to the above-described embodiment, since the drain discharge hole 90 for discharging the water in the connection pipe portion 72 is provided in the connection pipe portion 72, the condensed water generated inside the connection pipe portion 72 can be discharged. Therefore, it is possible to suppress the occurrence of the malfunction in the drive device 35 caused by the backflow of the condensed water.

[0043] In some embodiments, as shown in FIG. 6, a water receiving portion 94 for blocking movement of the water in the connection pipe portion 72 to the upstream side may be provided at a position on an upstream side of the drain discharge hole 90 inside the connection pipe portion 72. The water receiving portion 94 may include a plate-shaped member provided at a bottom portion of the connection pipe portion 72 at a position in the vicinity of the drain discharge hole 90.

[0044] According to the above-described embodiment, since the water receiving portion 94 for blocking the backflow of the water is provided on the upstream side of the drain discharge hole 90, it is possible to more effectively suppress the backflow of the condensed water occurred inside the connection pipe portion 72. Therefore, it is possible to more effectively suppress the occurrence of the malfunction in the drive device 35 caused by the backflow of the condensed water.

[0045] For example, contents described in each of the above-described embodiments are understood as follows.

[0046] (1) According to at least one embodiment of the present invention, there is provided a power generation set (1) including: a power generation unit (10) that includes a generator (38) and a drive device (35) for generating a driving force for rotationally driving the generator by combusting a fuel; an enclosure (2) that accommodates the power generation unit; and an exhaust unit (4) for exhausting exhaust gas from the drive device to an outside of the enclosure, in which the exhaust unit includes a silencer (78) that is provided outside the enclosure, and a connection pipe portion (72) for guiding the exhaust gas from the drive device to the silencer, and the connection pipe portion has an upward inclination angle of 0 degrees or more in a flow direction of the exhaust gas with respect to a horizontal direction at all positions in the flow direction. According to the configuration of (1) above, the connection pipe portion for guiding the exhaust gas from the drive device to the silencer has the upward inclination angle of 0 degrees or more in the flow direction with respect to the horizontal direction at all positions in the flow direction of the exhaust gas. That is, since the connection pipe portion does not have a descending slope and has an ascending slope or extends horizontally to the silencer, it is possible to suppress the accumulation of the lightweight unburned fuel gas in the pipe. Therefore, it is possible to suppress a local increase in the fuel gas concentration in the exhaust unit including the connection pipe portion, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit. (2) In some embodiments, in the configuration of (1) above, the exhaust unit includes an outlet pipe portion (80) that is connected to the silencer and that releases the exhaust gas from the silencer to the atmosphere, and the connection pipe portion, the silencer, and the outlet pipe portion have an upward inclination angle of 0 degrees or more in the flow direction of the exhaust gas with respect to the horizontal direction at all positions in the flow direction. According to the configuration of (2) above, in addition to the connection pipe portion, the silencer and the outlet pipe portion have the upward inclination angle of 0 degrees or more in the flow direction with respect to the horizontal direction at all positions in the flow direction of the exhaust gas. That is, since the connection pipe portion, the silencer, and the outlet pipe portion do not have a descending slope and have an ascending slope or extend horizontally to the outlet opening of the outlet pipe portion, it is possible to suppress the accumulation of the lightweight unburned fuel gas inside the pipe or the silencer. Therefore, it is possible to suppress a local increase in the fuel gas concentration in the exhaust unit, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit. (3) In some embodiments, in the configuration of (2) above, a downstream end of the outlet pipe portion (80) has an upward opening (for example, the outlet opening 82 described above) with respect to the horizontal direction. According to the configuration of (3) above, since the downstream end of the outlet pipe portion has the upward opening with respect to the horizontal direction, the exhaust gas is less likely to accumulate in the outlet pipe portion, and the exhaust gas can be smoothly released to the atmosphere. Therefore, it is possible to suppress a local increase in the fuel gas concentration in the outlet pipe portion, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit. (4) In some embodiments, in the configuration of any one of (1) to (3) above, a lower end (78a) of the silencer is located above a rotation axis (O) of the drive device in an up-down direction. According to the configuration of (4) above, since the lower end of the silencer is located relatively above, the pipe through which the exhaust gas from the drive device flows can be easily extended to the silencer to have an ascending slope or horizontally without having a descending slope. Therefore, it is easy to suppress a local increase in the fuel gas concentration in the exhaust unit including the connection pipe portion, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit. (5) In some embodiments, in the configuration of any one of (1) to (4) above, the power generation set further includes: equipment (for example, the fan 86 or the oil tank 88 described above) installed in a space below the silencer and configured to operate the power generation unit. According to the configuration of (5) above, since the equipment for operating the power generation unit is installed in the space below the silencer, the lower end of the silencer is located relatively above. Therefore, the pipe through which the exhaust gas from the drive device flows can be easily extended to the silencer to have an ascending slope or horizontally without having a descending slope. In addition, a space formed by providing the silencer at a relatively upper position can be effectively used as an equipment installation space. Therefore, while the power generation set is reduced in size, it is easy to suppress a local increase in the fuel gas concentration in the exhaust unit including the connection pipe portion, and it is possible to effectively reduce the risk of combustion explosion in the exhaust unit. (6) In some embodiments, in the configuration of any one of (1) to (5) above, the power generation set further includes: a drain discharge hole (90) provided in the connection pipe portion and configured to discharge water in the connection pipe portion. In a case where the inclination angle of the connection pipe portion is set to 0 degrees or more as in (1) above, there is a possibility that the condensed water generated in the pipe may flow back to the upstream side (that is, toward the drive device). When the condensed water that has flowed back adheres to the drive device, it becomes a factor of a malfunction in the drive device. In this regard, according to the configuration of (6) above, since the drain discharge hole for discharging the water in the connection pipe portion is provided in the connection pipe portion, the condensed water generated inside the connection pipe portion can be discharged. Therefore, it is possible to suppress the occurrence of the malfunction in the drive device caused by the backflow of the condensed water. (7) In some embodiments, in the configuration of (6) above, the power generation set further includes: a water receiving portion (94) provided on an upstream side of the drain discharge hole inside the connection pipe portion and configured to block movement of water in the connection pipe portion to the upstream side.

[0047] According to the configuration of (7) above, since the water receiving portion for blocking the backflow of the water is provided on the upstream side of the drain discharge hole, it is possible to more effectively suppress the backflow of the condensed water occurred inside the connection pipe portion. Therefore, it is possible to more effectively suppress the occurrence of the malfunction in the drive device caused by the backflow of the condensed water.

[0048] Although the embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and includes modifications of the above-described embodiments and a combination of these embodiments as appropriate.

[0049] In the present specification, expressions representing relative or absolute dispositions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", and "coaxial" not only strictly represent the dispositions, but also represent a state where the dispositions are relatively displaced with a tolerance or at an angle or a distance to such an extent that the same function can be obtained.

[0050] For example, expressions representing that matters are in an equal state such as "same", "equal", and "homogeneous" not only strictly represent an equal state, but also represent a state where a difference exists with a tolerance or to such an extent that the same function can be obtained.

[0051] Further, in the present specification, expressions representing shapes such as a quadrangular shape and a cylindrical shape not only represent shapes such as a quadrangular shape and a cylindrical shape in a geometrically strict meaning, but also represent shapes including an uneven portion or a chamfered portion within a range where the same effect can be obtained.

[0052] Further, in the present specification, expressions such as "being provided with", "including", and "having" one component are not exclusive expressions excluding the presence of other components.Reference Signs List

[0053] 1: power generation set 2: enclosure 4: exhaust unit 8: enclosure body portion 10: power generation unit 12: air supply port 14: exhaust port 16: foundation portion 18: side wall portion 19: long portion 20: air supply side portion 20a: upper end 22: exhaust side portion 22a: upper end 24: roof portion 25: lower surface 26: inlet opening 28: outlet opening 29: partition plate 30: air supply hood 32: exhaust duct 34: ventilation fan 35: drive device 36: engine 37: partition plate 38: generator 40: combustion chamber 42: crank chamber 44: turbocharger 46: air supply filter 47: inlet 48: air supply duct 50: exhaust pipe 52: fuel pipe 54: internal pipe portion 56: external pipe portion 57: valve 58: shutoff valve 60: stand 60A: stand 60B: stand 70: foundation portion 72: connection pipe portion 78: silencer 78a: lower end 80: outlet pipe portion 80a: first portion 80b: second portion 82: outlet opening 84: support table 86: fan 88: oil tank 90: drain discharge hole 92: drain discharge pipe 94: water receiving portion O: rotation axis L1: center line L1 of outlet pipe portion 80 LH: straight line in horizontal direction θ: inclination angle

Claims

1. A power generation set comprising: a power generation unit that includes a generator and a drive device for generating a driving force for rotationally driving the generator by combusting a fuel; an enclosure that accommodates the power generation unit; and an exhaust unit for exhausting exhaust gas from the drive device to an outside of the enclosure, wherein the exhaust unit includes a silencer that is provided outside the enclosure, and a connection pipe portion for guiding the exhaust gas from the drive device to the silencer, and the connection pipe portion has an upward inclination angle of 0 degrees or more in a flow direction of the exhaust gas with respect to a horizontal direction at all positions in the flow direction.

2. The power generation set according to Claim 1, wherein the exhaust unit includes an outlet pipe portion that is connected to the silencer and that releases the exhaust gas from the silencer to the atmosphere, and the connection pipe portion, the silencer, and the outlet pipe portion have an upward inclination angle of 0 degrees or more in the flow direction of the exhaust gas with respect to the horizontal direction at all positions in the flow direction.

3. The power generation set according to Claim 2, wherein a downstream end of the outlet pipe portion has an upward opening with respect to the horizontal direction.

4. The power generation set according to any one of Claims 1 to 3, wherein a lower end of the silencer is located above a rotation axis of the drive device in an up-down direction.

5. The power generation set according to any one of Claims 1 to 3, further comprising: equipment installed in a space below the silencer and configured to operate the power generation unit.

6. The power generation set according to any one of Claims 1 to 3, further comprising: a drain discharge hole provided in the connection pipe portion and configured to discharge water in the connection pipe portion.

7. The power generation set according to Claim 6, further comprising: a water receiving portion provided on an upstream side of the drain discharge hole inside the connection pipe portion and configured to block movement of water in the connection pipe portion to the upstream side.

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