JPH02204636A - Package for gas turbine power generating set - Google Patents

Abstract

PURPOSE:To obtain a generating set excellent in ventilating capacity and high in silencing effect and its miniaturization by installing a fan, feeding ventilating air, and a silencer being situated at the upstream side of this fan, in a ventilating inlet passage of a package. CONSTITUTION:A ventilating outlet passage 26 extending from an outlet opening 24 to an exhaust inlet is formed around an exhaust stack 65, and an intake inlet 50 and a ventilating inlet 53 are situated in each position distant from a silencer 15, while a fan 60, feeding a setup room 12 forcedly with ventilating air, and a silencer by a bent passage at the upstream side both are installed in a ventilating inlet passage 22 ranging from a ventilating inlet 53 to a generator set 3. In consequence, air taken in the ventilating inlet passage 22 is thrust in the setup room 12 of the generator set 3 by the inlet fan 60, and even in the ventilating outlet passage 26, pressure in the ventilating air is relatively kept high, and the ventilating air is effectively inhaled in the exhaust inlet of the silencer 15 owing to an ejector effect of high speed exhaust flow out of the exhaust stack 65.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power generation device in which a generator is driven by a gas turbine engine, and more specifically, to a power generation device in which a generator is driven by a gas turbine engine. This relates to a package (outer wall structure) with a soundproof structure.

[Prior Art] This type of power generation device is described in Japanese Patent Application Laid-open No. 186019/1983 and Japanese Patent Application No. 81081/1983, and generally,
It is installed inside a high-rise building for private power generation. Such power generation equipment requires ventilation inlet passages and ventilation outlet passages to ventilate the interior of the package, as well as intake inlet passages and exhaust passages to transport combustion air in the engine. , connected to the outdoor passage through a duct.

However, because the equipment is placed indoors, the location and dimensions of such ducts are often restricted, and when the conditions regarding ducts are severe, it is necessary to A passage may be used to form a ventilation exit passage.

In this structure, a ventilation outlet is formed around the engine's exhaust outlet (exhaust stack), and the ejector effect of the engine exhaust causes the air inside the package to be discharged together with the exhaust air into the exhaust outlet passage (silencer). ing.

[Problems to be Solved by the Invention] However, as described above, a power generation device placed indoors is required to have a high soundproofing function. To this end, a silencer consisting of a meandering flow path or other mechanism is installed in each passage or muffler, but this silencer increases the flow resistance of the passage. In particular, in cases where the soundproofing conditions are severe, passage resistance must be made extremely large in order to enhance the silencer's silencing function to meet the strict soundproofing conditions. As a result, ventilation air for exhaust may not be sufficiently exhausted due to the ejector effect of the exhaust.

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

The present invention aims to provide a structure that solves the above problems.

[Means for Solving the Problems] In order to achieve the above object, the present invention houses a generator set including a generator and a gas turbine engine that drives the generator inside a package, An intake inlet, a ventilation inlet, and an outlet opening are provided for the engine that communicate with the package, a silencer is provided adjacent to the package, and the exhaust pipe of the engine is opened toward the exhaust inlet of the silencer. a ventilation outlet passage extending from the outlet opening to the exhaust inlet, the intake inlet and the ventilation inlet being located away from the muffler, and forming a ventilation outlet passage around the exhaust stack, the intake inlet and the ventilation inlet being located away from the muffler; The ventilation inlet passage extending to the installation room of the generator set is provided with a fan for forcibly sending ventilation air into the installation room, and a silencer located upstream of the fan.

[Operation] According to the above structure, the air flowing into the ventilation passageway is forced into the installation room of the generator set by the inlet fan. Therefore, the pressure of the ventilation air is maintained relatively high also in the ventilation outlet passage, and the ejector effect of the high-velocity exhaust flow from the exhaust stack effectively draws the ventilation air into the exhaust inlet of the muffler.

[Example] Fig. 1 is a schematic vertical cross-sectional view of a power generation device according to an embodiment of the present invention;
3 and 3 are schematic cross-sectional views taken along the lines 1--2 and 2--2 in FIG. 1, respectively, and FIG. 4 is a schematic view taken along the line IV--IV in FIG. 1. In FIG. 1, a generator set 3 consisting of a generator 1 and a gas turbine engine 2 that drives it is installed inside a package 5, and the center line of both is 0-0 (for example, the center of the drive shaft of the generator 1). It is installed on a mounting stand on the foundation with the line) extending to the water W.

In the following description, a direction parallel to the center line O-0 will be referred to as a vertical direction or a front-back direction, and a direction perpendicular to and horizontal to the center line O-0 will be referred to as a horizontal direction or a left-right direction.

The package 5 has a generally rectangular parallelepiped shape, and has a section 1 extending in the horizontal direction.
A pair of (front and rear) vertical end walls 6.7 and a longitudinally extending 1
It comprises a pair of (left and right) vertical side walls 8.9 (FIG. 2) and an uppermost horizontal earthen wall 10. Furthermore, a horizontal partition wall 11 is arranged above the package 5. The internal space of the package 5 is roughly divided by the partition wall 11 into an upper passage space and a generator installation chamber 12 below the passage space, and the generator set 3 is installed in the generator installation chamber 12.

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

The above-mentioned 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 passages, and in order to form these passages, a hood is provided in the package 5. 30, 32 etc. are attached.

Further, an intake inlet passage 20 is provided between the upper wall 10 and the partition wall 11.
and a vertical bulkhead 35 for forming the ventilation inlet passage 22 (
(Fig. 2), 36 and 37 are provided.

As shown in FIG. 2, the partition wall 35 extends vertically from the end wall 6 to the longitudinal middle part of the package 5 in the middle part of the package 5 in the transverse direction. The partition wall 36 extends from the front end of the partition wall 35 to the side wall 8.
It extends laterally.

The partition wall 37 extends laterally between the front parts of the side walls 8.9. A space 40 is formed between the partition wall 37 and the end wall 7. The space 40 is a space for accommodating the oil cooler 41 of the engine 2, that is, a part of the generator set installation room, and a space 40 is connected to the generator installation room 12 below at the front end of the horizontal bulkhead 11. An opening 42 is provided. The oil cooler 41 protrudes upward from the front end of the main body of the engine 2 and enters the space 40, and is cooled by ventilation air flowing through the generator installation chamber 12.

As shown in FIGS. 3 and 4, the hood 30 protrudes rearward from the right half of the end wall 6, and as shown in FIG. It is now open to the public and has a population of 50.

The upper end of the hood 30 is located at the same height as the earth wall 10, and the lower end is located at approximately the same height as the vertically intermediate portion of the end wall 6.

As shown in FIG. 2, the internal passage of this hood 30 is
It communicates with the space between the side 99 and the partition wall 35 (the middle part of the intake inlet passage 20) through the opening 51 provided in the upper right corner of the 20). In the vicinity of the partition wall 37, the partition wall 11 is provided with an opening 52 through which the downstream end of the intake inlet passage 20 communicates. As shown in FIG. 1, the intake inlet passage 20 is connected to the intake passage of the engine 2 through an opening 52. As shown in FIG. Although not shown, a silencer is provided in the middle of the intake manifold passage 20. The silencer is configured, for example, by arranging a plurality of vertical plate-shaped portions extending in the front-rear direction and spaced apart from each other in the left-right direction.

As is clear from FIGS. 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 its upstream portion is formed by the hood 32. The hood 32 protrudes rearward and upward from the end wall 6 and the upper wall 10, and its rear protrusion is integrally assembled with the hood 30. The hood 32 protrudes higher than the hood 30, but as shown in FIG. 1, the vertical wall and lower end of the rear end are aligned with those of the hood 30, and the lower end is open to form an inlet 53. .

As shown in FIG. 1, the ventilation inlet passage 22 includes three passage sections 54, 56, 58 in the illustrated example.

A passageway portion 54 extends upwardly from the port 53 within the hood 32 . The passage portion 56 is formed above the upper wall 10 and extends forward inside the hood 32 from the upper end of the passage portion 54. The passage portion 58 extends between the upper wall 10 and the partition wall 11 in the front-rear h direction, and extends through the opening 5 provided in the earthen wall 10.
7 to the front end of the passage section 56. The rear end of the passage portion 58 is connected to an opening 59 provided at the rear end of the partition wall 11.
It communicates with the generator installation room 12 via.

In this way, the ventilation inlet passage 22 is complicatedly curved, specifically, it extends upward, then forward, and then further backward, so that the bending provides a noise reduction function; in other words, The curved passage itself constitutes a silencer.

In the embodiment of the present invention, a fan 60 is provided in a portion of the ventilation passageway 22 on the downstream side of the silencer. In the illustrated embodiment, the fan 60 is a motor-driven axial flow fan, which is provided in the passage section 58 on the downstream side and forces the air flowing into the passage section 58 into the generator installation chamber 12.
It acts to send it to.

The outlet opening 24 is provided in the lower half of the end wall 7, and the exhaust pipe 65 of the engine 2 projects toward the muffler 15 through it. The muffler 15 includes a funnel-shaped inlet pipe 66 that extends to near the tip of the exhaust pipe 65. Inlet pipe 6
6 has an inlet opening having a larger diameter than the exhaust pipe 65, and an annular gap 67 is formed between the outer periphery of the exhaust pipe 65 and the inner periphery of the inlet pipe 66.

The ventilation outlet passage 26 is connected to this gap 67.

The ventilation outlet passage 26 is formed around the exhaust pipe 65 and communicates with the generator installation chamber 12 through a gap between the inner periphery of the outlet opening 24 and the exhaust pipe 65. Also, ventilation outlet opening 2
A large-diameter cylindrical wall 68 surrounding the ventilation outlet passage 26 is provided between the peripheral edge of the silencer 4 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 into the inlet pipe 66 at a high flow velocity, and due to the ejector effect of the exhaust, air in the ventilation outlet passage 26 flows from the gap 67 into the inlet pipe 66. It gets sucked in. That is, the ventilation air in the generator installation room 12 is discharged into the muffler 15 through the ventilation outlet passage 26 due to the ejector effect, and is discharged to the muffler 15 together with the exhaust gas from the engine 2.

In this operation, ventilation air is supplied to the fan 60 as described above.
The power is supplied to the inside of the generator installation room 12 in a strong manner. Therefore, the pressure of the ventilation air in the ventilation outlet passage 26 is maintained at a relatively high value, so that the air flow rate from the ventilation outlet passage 26 to the artificial tube 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 explained above, according to the present invention, in a power generation device equipped with an ejector-type ventilation/exhaust section, the ejector effect can be sufficiently enhanced by forcibly supplying ventilation air using the fan 60. , the exhaust efficiency of ventilation air can be improved.

Therefore, even if the ventilation passageway and the exhaust passageway are constructed to have relatively high passage resistance in order to enhance the silencing effect, ventilation can be performed reliably. In this way, the present invention has excellent ventilation performance,
Furthermore, it is possible to obtain a device with a high silencing effect. Since there is no need to particularly reduce thermal resistance and passage resistance, it is not necessary to enlarge the passage structure in order to improve the silencing function, and therefore it is possible to downsize the device.

[Another embodiment] In the illustrated structure, the hood 3 is
0.32, but in applications where noise regulations are not strict, one or both of them may be abolished.

The package of the gas turbine power generator of the above-mentioned embodiment is
As shown in FIG. 5, two or more engines can be arranged adjacent to each other in the axial direction of the engine. In that case, if the air intake section were to have a structure as shown in Figure 1, warm air due to heat radiation from the silencer 95 next to it would be sucked in, which would impair the output characteristics of one gas turbine engine. Because of this risk, there arises the problem that successful arrangement cannot be achieved unless there is a large installation space that allows sufficient separation between two adjacent packages.

In order to improve this problem, in the embodiments shown in FIGS. 5 and 6, the following measures have been taken in the air intake portion of the package.

i.e. air (ventilation and engine intake) intake 81
is opened 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), and the air is The intake port 81 is oriented away from it and not facing it. This air intake 8
1, the ventilation port 81a communicates with an opening (not shown) in the ceiling of the package 82 at the rear end of the generator.

Further, the engine intake port 81b is opened at a position offset from the ventilation port 81a toward the center of the package 82. With this structure, there is no diaphragm inside the package, the pressure loss of the internal exchange current is slightly reduced, the use of a low static pressure fan (80% of the static pressure of the conventional one) is possible, and ejector ventilation is possible. In this case, since the intake resistance is reduced, an increase in resistance within the muffler is allowed, and a low-noise ejector can be used accordingly.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of a power generation device according to an embodiment of the present invention;
3 and 3 are schematic cross-sectional views of FIG. 1, respectively, FIG. 4 is a schematic view taken along the line IV-IV of FIG. 1, and FIG. The side view of the example, FIG. 6, is a view taken along the line Vl--Vl in FIG. 1... Generator, 2... Gas turbine engine, 3.
... Generator cellar, 5... Package, 12... Generator installation room, 15... Silencer, 22... Ventilation inlet passage, 24... Exit opening, 26... Ventilation outlet aisle, 5
0...Intake inlet, 53...Ventilation inlet, 60...Fan, 65...Exhaust pipe, 66...Inlet pipe Patent applicant Yanmar Diesel Co., Ltd. Figure 5 4-i

Claims (1)

[Claims] A generator set including a generator and a gas turbine engine for driving the generator is housed inside the package, and the package is provided with an intake inlet, a ventilation inlet, and an outlet opening for the engine that communicate with the inside of the package, and is adjacent to the package. a muffler is provided, the exhaust pipe of the engine is positioned within the outlet opening with the exhaust pipe opening toward the exhaust inlet of the muffler, and a muffler is provided around the exhaust pipe from the outlet opening to the exhaust inlet. forming an extending ventilation outlet passage, and locating the intake inlet and the ventilation inlet at a distance from the muffler, and forcing ventilation air into the ventilation inlet passage extending from the ventilation inlet to the installation room of the generator set. 1. A package for a gas turbine power generator, characterized in that it includes a fan for feeding into an installation room, and a silencer located upstream of the fan.