JP2860557B2 - Gas turbine power plant package - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a power generator in which a generator is driven by a gas turbine engine, and more specifically, to accommodate such an engine and a generator. Package outer wall structure having a soundproof structure).

[Prior Art] This type of power generator is disclosed in Japanese Patent Application Laid-Open Nos.
It is described in -81081, etc., and is generally installed for private power generation inside high-rise buildings. Such a power generator requires a ventilation inlet passage and a ventilation outlet passage for ventilating the inside of the package, and an intake inlet passage and an exhaust passage for transporting combustion air in the engine. , And is connected to an outdoor passage through a duct.

However, since the equipment is placed indoors, the position and dimensions of such ducts are often limited, and when conditions regarding ducts and the like are strict, exhaust ducts are omitted in order to omit ducts for ventilation outlet passages. In some cases, a ventilation outlet passage is formed using the passage. In this structure, a ventilation outlet is formed around the exhaust outlet (exhaust pipe) of the engine, and the air inside the package is discharged to the exhaust outlet passage (muffler) together with the exhaust due to the ejector effect of the engine exhaust. ing.

[Problems to be Solved by the Invention] However, as described above, a power generator installed indoors is required to have a high soundproofing function. For this purpose, a silencer including a meandering channel and other mechanisms is installed in each passage or muffler, and the silencer increases the flow resistance of the passage. In particular, when the soundproof condition is severe, the passage resistance must be extremely large in order to enhance the silencing function of the silencer so as to meet the requirement. As a result, the ventilating air for discharge may not be sufficiently discharged due to the ejector effect of the discharge.

Of course, if each passage and muffler are enlarged, the passage resistance can be made relatively low and a sufficient soundproofing effect can be obtained. However, in that case, the entire device becomes large and cannot be installed indoors.

An object of the present invention is to provide a structure that solves the above problem.

[Means for Solving the Problems] In order to achieve the above object, the present invention accommodates a generator set 3 including a generator 1 and a gas turbine engine 2 for driving the generator set 3 inside a package 5, Package 5
The engine has an intake inlet 50, a ventilation inlet 53, and an outlet opening 24 for an engine communicating therewith, a muffler 15 provided adjacent to the package 5, and an exhaust pipe 65 of the engine 2 is provided with a muffler.
The outlet opening 24
And the outlet opening 24 around the exhaust pipe 65.
To form a ventilation outlet passage 26 extending to the exhaust inlet,
The intake inlet 50 and the ventilation inlet 53 are located at positions away from the muffler 15, and the intake inlet 50 is located above the generator installation room 12.
, The partition wall 37 for the storage space 40 of the oil cooler 41, the horizontal partition wall 11 for the generator installation chamber 12, the side wall 9 and the partition walls 35 and 36, and a silencer is formed in the middle. While extending the intake inlet passage 20,
Passage portions 54, 56, 58 for supplying ventilation to the accommodating space 40 and the generator installation room 12 communicating with the annular gap 67 between the inlet pipe 66 of the silencer 15 and the exhaust pipe 65, the partition wall 35 , 36 and 32 hoods
The ventilation inlet passage 22 extending upward from the ventilation inlet 53
And extending forward from the opening 57 and bending rearward on the downstream side of the fan 60 so as to extend to the opening 59 of the horizontal partition 11, and is adjacent to the upstream side of the intake inlet passage 20.

[Operation] According to the above structure, the air flowing into the ventilation inlet passage is pushed into the installation room of the generator set by the inlet fan.
Therefore, even in the ventilation outlet passage, the pressure of the ventilation air is kept relatively high, and the ventilation air is effectively sucked into the exhaust inlet of the silencer by the ejector effect of the high-speed exhaust flow from the exhaust stack.

Embodiment FIG. 1 is a schematic vertical sectional view of a power generator according to an embodiment of the present invention, and FIGS. 2 and 3 are II-II and III-III in FIG. 1, respectively.
FIG. 4 is a schematic sectional view taken along the line IV-IV of FIG. In FIG. 1, a generator set 3 including a generator 1 and a gas turbine engine 2 for driving the generator 1 is installed inside a package 5, and has a center line OO (for example, the center of the drive shaft of the generator 1). Line) extends horizontally and is installed on a mounting base on the foundation.

In the following description, a direction parallel to the center line OO is referred to as a vertical direction or a front-back direction, and a direction perpendicular and horizontal to the center line OO is referred to as a lateral direction or a left-right direction.

The package 5 has a substantially rectangular parallelepiped shape, and a pair of (front and rear) vertical end walls 6, 7 extending in a lateral direction and a pair of (left and right) vertical side walls 8, 9 extending in a vertical direction (FIG. 2). And a horizontal upper wall 10 located at the uppermost position. A horizontal partition 11 is disposed above the package 5. The partition 11 divides the internal space of the package 5 into an upper passage space and a generator installation room 12 thereunder. The generator set 3 is installed in the generator installation room 12.

A silencer 15 is located adjacent to the front end wall 7 of the package 5.
Is arranged. The silencer 15 is a box-shaped structure having an exhaust silence passage therein, and an outlet (not shown) is connected to another exhaust passage.

The above-described power generation device is provided with an intake inlet passage 20, a ventilation inlet passage 22, an outlet opening 24, and a ventilation outlet passage 26 as main passage portions, and a package 5 30, 32, etc. are attached. Furthermore, the upper wall
Between 10 and bulkhead 11, there is an intake inlet passage 20 and a ventilation inlet passage 22
Vertical partitions 35 (FIG. 2), 36, 37 are provided for forming.

As shown in FIG. 2, the partition wall 35 extends in the middle of the package 5 in the horizontal direction from the end wall 6 to the middle of the package 5 in the vertical direction. The partition wall 36 extends laterally from the front end of the partition wall 35 to the side wall 8. The partition 37 extends laterally at the front of the side walls 8, 9. A space 40 is formed between the partition 37 and the end wall 7. Space 40 is the oil cooler for engine 2
A space for accommodating the space 41, that is, a part of the generator set installation room. At the front end of the horizontal partition 11, an opening 42 for connecting the space 40 with the generator installation room 12 therebelow is provided. The oil cooler 41 projects upward from the front end of the main body of the engine 2 and enters the space 40, and is cooled by the ventilation air flowing through the generator installation room 12.

As shown in FIGS. 3 and 4, the hood 30 projects rearward from the right half of the end wall 6, and forms an upstream portion of the intake inlet passage 20 therein as shown in FIG. It is open to form an inlet 50. The upper end of the hood 30 is at the same height as the upper wall 10, and the lower end is located at substantially the same height as the middle part of the end wall 6 in the vertical direction.

As shown in FIG. 2, the passage inside the hood 30 is formed by the end wall 6.
Communicates with a space between the side wall 9 and the partition wall 35 (an intermediate portion of the intake inlet passage 20) through an opening 51 provided at the upper right portion of the airbag. 20 downstream part). In the vicinity of the partition 37, the partition 11 is provided with an opening 52 to which the downstream end of the intake inlet passage 20 communicates. As shown in FIG. 1, the intake passage 20 is connected to the intake passage of the engine 2 through the opening 52. or,
Although not shown, a silencer is provided in the middle of the intake passage 20. The silencer is configured by, for example, arranging a plurality of vertical plate members extending in the front-rear direction at an interval in the left-right direction.

2 to 4, the ventilation inlet passage 22 is provided behind the partition wall 36 and in the left half of the package 5, and the upstream portion thereof is formed by the hood 32.
The hood 32 projects rearward and upward from the end wall 6 and the upper wall 10, and the rear projecting portion is assembled integrally with the hood 30. The hood 32 protrudes upward from the hood 30, but as shown in FIG. 1, the vertical wall and the lower end of the rear end coincide with those of the hood 30, and the lower end is open to form an entrance 53. . As shown in FIG.
Includes three passage portions 54, 56, 58 in the illustrated example. The passage portion 54 extends inside the hood 32 from the entrance 53 upward. The passage portion 56 is formed above the upper wall 10, and extends inside the hood 32 from the upper end of the passage portion 54 to the front. The passage portion 58 extends between the upper wall 10 and the partition wall 11 in the front-rear direction, and passes through an opening 57 provided in the upper wall 10 to pass through the passage portion 56.
It communicates with the front end. The rear end of the passage 58 is a partition 11
It communicates with the generator installation room 12 through an opening 59 provided at the rear end of the generator.

As described above, the ventilation inlet passage 22 is bent in a complicated manner, and specifically, extends upward, then forward, and further extends rearward, so that the bending provides a silencing function. The bent passage itself constitutes a silencer.

In the embodiment of the present invention, a fan 60 is provided in a portion of the ventilation inlet passage 22 downstream of the silencer. The fan 60 is a motor-driven axial fan in the illustrated embodiment, and is provided in the downstream passage portion 58.
The air that has flowed into 58 acts so as to be forcibly sent into the generator installation room 12.

The outlet opening 24 is provided in the lower half of the end wall 7, through which the exhaust pipe 65 of the engine 2 projects toward the muffler 15. The silencer 15 includes a funnel-shaped inlet pipe 66 extending to near the tip of the exhaust stack 65. The inlet pipe 66 has an inlet opening with a larger diameter than the exhaust pipe 65, and an annular gap 67 is formed between the outer circumference of the exhaust pipe 65 and the inner circumference of the inlet pipe 66.

The ventilation outlet passage 26 is connected to the gap 67. The ventilation outlet passage 26 is formed around the exhaust pipe 65, and communicates with the generator installation chamber 12 via a gap between the inner periphery of the outlet opening 24 and the exhaust pipe 65. A large-diameter cylindrical wall 68 surrounding the ventilation outlet passage 26 is provided between the peripheral edge of the ventilation outlet opening 24 and the outer surface of the muffler 15.

According to this structure, the exhaust gas of the engine 2 is discharged from the exhaust pipe 65 to the inside of the inlet pipe 66 at a large flow rate, and the air in the ventilation outlet passage 26 flows from the gap 67 to the inside of the inlet pipe 66 by the ejector effect due to the exhaust gas. Inhaled. That is,
The ventilation air in the generator installation room 12 is discharged into the muffler 15 through the ventilation outlet passage 26 by the ejector effect,
The exhaust gas is discharged to the silencer 15 together with the exhaust gas of the engine 2.

In this operation, the ventilation air is supplied to the fan 60 as described above.
Is forcibly supplied to the inside of the generator installation room 12. Accordingly, the pressure of the ventilation air in the ventilation outlet passage 26 is maintained at a relatively high value, and therefore the ventilation outlet passage
The air flow from 26 to the inlet pipe 66 is always maintained at a high value. As a result, the ventilation efficiency of the generator installation room 12 can be sufficiently increased, and each part of the generator set 3, especially the oil cooler 41 of the engine 2, etc. can be sufficiently cooled.

[Effects of the Invention] As described above, according to the present invention, in a power generator equipped with an ejector-type ventilating / discharging unit, the ventilation air is forcibly supplied by the fan 60 to sufficiently enhance the ejector effect. In addition, the efficiency of exhausting ventilation air can be improved. Therefore, even if the ventilation passage or the exhaust passage is configured to have a relatively high passage resistance in order to enhance the noise reduction effect, the ventilation can be reliably performed. As described above, according to the present invention, it is possible to obtain a device that is excellent in ventilation performance and has a high sound deadening effect. Of course, it is not necessary to particularly reduce the passage resistance, so that it is not necessary to increase the size of the passage structure to improve the noise reduction function, and therefore, the device can be downsized.

When the passage portions 54, 56, 58 are adjacent to the upstream side of the intake inlet passage 20, the housing space of the oil cooler 41 from the generator installation room 12
After ventilation flows through the oil cooler 41 and cools the oil cooler 41, the gas flows into the muffler 15 through the annular gap 67 between the inlet pipe 66 and the exhaust pipe 65 of the muffler 15, and the combustion temperature of the gas turbine engine is reduced. After cooling the generator installation room 12 with the ventilation air volume, the oil cooler 41, which is the hottest, can be further cooled, and since the ventilation pressure is high due to Freon, the oil cooler 41 will not flow into the silencer 15. Sufficiently performed, the ejector effect at the outlet of the exhaust pipe 65 of the gas turbine engine is improved, and the output can be improved without causing a surging phenomenon.

[Another embodiment] In the structure shown in the figure, a hood is used to enhance the noise reduction effect.
Although 30 and 32 are provided, one or both of them may be abolished in the application where the regulation on noise is not strict.

As shown in FIG. 5, two or more packages of the gas turbine power generator of the above-described embodiment can be arranged adjacent to each other in the axial direction of the engine. In such a case, if the air intake portion has a structure as shown in FIG. 1, warm air due to heat radiation from the silencer 95 adjacent to the air intake portion will be sucked, which may impair the output characteristics of one gas turbine engine. Therefore, there is a problem that the two packages cannot be arranged properly unless there is a wide installation space capable of sufficiently separating the two adjacent packages. In order to improve this, in the embodiment shown in FIGS. 5 and 6, the air intake section of the package is devised as follows.

That is, the air (ventilation and engine intake) intake 81
Is open on the side opposite to the control side of the package 82 (the side opposite to the maintenance inspection door on the side wall: the right side in FIG. 6). The intake 81 is away from it and faces away from it. Of the air intake 81, the ventilation opening 81a communicates with an opening (not shown) in the ceiling portion at the rear end of the generator in the package 82. The engine intake port 81b is opened at a position offset from the ventilation port 81a toward the center of the package 82. According to this structure, there is no partition plate in the package, the pressure loss of the ventilation flow inside can be reduced slightly, and a low static pressure fan (static pressure of 80% of the conventional one) can be used. In the case of (1), the decrease in the intake resistance allows the resistance in the muffler to be increased, so that the use of a low-noise ejector becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view of a power generator according to an embodiment of the present invention.
FIGS. 3 and 3 are schematic sectional views taken along lines II-II and III-III of FIG. 1, FIG. 4 is a schematic sectional view taken along the line IV-IV of FIG. 1, and FIG.
Side view of another embodiment having more than one package, FIG.
The figure is a view taken in the direction of arrows VI-VI in FIG. 1 ... generator, 2 ... gas turbine engine, 3 ... generator set, 5 ... package, 12 ... generator installation room, 15
... silencer, 22 ... ventilation inlet passage, 24 ... outlet opening,
26 …… Ventilation outlet passage, 50 …… Intake inlet, 53 …… Ventilation inlet, 60 …… Fan, 65 …… Exhaust pipe, 66 …… Inlet pipe

Claims (1)

(57) [Claims] A generator set (3) including a generator (1) and a gas turbine engine (2) for driving the generator is housed inside a package (5), and is housed inside the package (5). An intake inlet (50), a ventilation inlet (53), and an outlet opening (24) for a communicating engine, a muffler (15) provided adjacent to the package (5), and an exhaust stack of the engine (2). (65) is positioned inside the outlet opening (24) in a state of opening toward the exhaust inlet of the silencer (15), and is positioned around the exhaust pipe (65) from the outlet opening (24) through the outlet opening (24). A ventilation outlet passage (26) extending to the exhaust inlet is formed, and the intake inlet (50) and the ventilation inlet (53) are located away from the muffler (15). To the hood (30) with the intake opening (50) opened and the storage space (40) of the oil cooler (41) An intake inlet passage composed of a partition wall (37), a horizontal partition wall (11) between the generator installation chamber (12), a side wall (9) and partition walls (35) and (36), and having a silencer formed in the middle thereof (20) is extended, and the accommodating space (40) communicating with the annular gap (67) between the inlet pipe (66) of the silencer (15) and the exhaust pipe (65) and the generator installation chamber ( Passage (5) to provide ventilation for 12)
4), (56) and (58) are formed by dividing walls (35) and (36) and a hood (32) into a ventilation inlet passage (22) extending upward from a ventilation inlet (53) and an opening (57) extending forward. ) To fans (6
0) The package of the gas turbine power generation device, which is bent downstream toward the downstream side and is adjacent to the upstream side of the intake inlet passage (20) so as to extend to the opening (59) of the horizontal partition (11). .