JPH0137577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a completely enclosed gas turbine directly connected to a generator.

[Conventional technology and its problems]

BACKGROUND ART Conventionally, gas turbines have been used to drive generators and serve as emergency power sources or as power sources on remote islands and the like.

On the other hand, if a gas turbine is used as an internal combustion engine that is directly connected to a generator installed in a building, etc., the weight per unit of output is smaller than that of a diesel engine, so it can be installed on the roof of a building. . For this reason, if power generation equipment using a gas turbine is designed to be installed in the basement of a building, it will require some ingenuity in the design of the intake and exhaust passages, but if such power generation equipment is installed on the roof of a building, there is almost no need to do so. It turns out.

On the other hand, power generation equipment using gas turbines is installed entirely within an enclosure (also called a cubicle or package) to prevent the noise it generates.
However, the overall enclosure member has become large and expensive, and in the case of a generator-directly coupled gas turbine, it is necessary to align the axes of the gas turbine and the generator with respect to the base; It is difficult to carry out work on site, such as on rooftops or basements, so it is generally carried out inside manufacturing plants. Therefore, since the entire enclosing member itself has almost no parts requiring assembly precision, it is required that only the enclosing member itself be easily assembled and disassembled at the installation site.

Currently, generator-directly coupled gas turbines designed based on the above-mentioned technical background are in widespread use, but as an example of a conventional generator-directly coupled gas turbine, oil is installed in the upper part of the gas turbine's combustor. A structure is known in which a cooler is installed and ventilation is cooled by pushing (for example, Japanese Utility Model Application No. 56-77618). In such a conventional structure, an oil cooler is installed on top of a highly heated engine, and if this is to be applied to an outdoor installation type where the entire enclosure is ventilated by an exhaust ejector function, it is necessary to install an oil cooler. It becomes necessary to change the installation location, and this change makes the structure more complicated and requires new parts, which inevitably increases costs.

[Means for solving problems]

Therefore, the present invention was created in an attempt to solve the above-mentioned disadvantages of the conventional example, and its gist is to provide a power generation facility using a gas turbine 1 surrounded by an overall enclosure 4, and the combustion of the gas turbine 1. A partition wall 13 is provided near the junction of the compressor and the compressor to divide the entire enclosure body 4 into two, and an air-cooled oil cooler 15 is installed on the side of the gas turbine of the partition wall.
The ventilation flow within the overall enclosure 4 is transferred to the oil cooler 15.
This is a completely enclosed indoor/outdoor gas turbine type power generating equipment in which the gas turbine exhaust passage 17 protruding from the whole enclosure 4 and the ejector pipe 22 are replaceable, and The ventilation flow passing through the oil cooler 15 is sucked by a fan 6 which is detachable and installed at the place where the ventilation comes out of the oil cooler 15. .

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below with reference to embodiments shown in the accompanying drawings.

1 is a partially cutaway front view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a partially cutaway side view seen from direction A in FIG. 1. This embodiment is a two-machine, single-shaft gas turbine power generation facility for indoor installation, in which reference numeral 1 is a gas turbine, 2 is a generator, and these are placed on a common base 3. Reference numeral 4 denotes a cubicle-shaped total enclosure, which has an air intake 5 on the side facing the generator and a suction fan 6 for outdoor discharge on the ceiling at the opposite end. An intake passage 7 communicating with the air intake port 5 is provided in the ceiling of the overall enclosure 4, and the intake passage 7 is divided and interposed with splitters 9, 9 each having a sound absorbing plate 8 therein. An opening 21 is located between these splitters 9, 9.
A part of the outside air flowing through the intake passage 7 is caused to flow down from here and blown onto the upper part of the generator 2. A baffle plate 10 that straddles the generator 2 is suspended from the outer lower surface of the intake passage 7, and outside air is circulated as shown by the arrow in FIG. Reference numeral 11 denotes an intake part called an inlet plenum, which is taken into the gas turbine 1, and the intake part 11 is suspended from the end of the intake passage 7 via a flexible pipe 12.

Here, reference numeral 13 denotes a partition wall that is suspended near the joint between the compressor and the combustor of the gas turbine 1, and as shown in FIGS. Enclosure 4 is completely divided into two. In the ventilation passage 14, oil coolers 15, 15 connected vertically are mounted on an oil cooler mounting base 16 formed by an extension of the partition wall 13.

Reference numerals 17, 17 are exhaust passages constructed from flexible hoses, which communicate with the flue through a silencer (not shown). 18, 18 are mounting legs of the generator 2, 19, 19 are doors that open and close as shown in FIG. 2, and 20 is a removable lid provided on the side surface on the gas turbine 1 side.

Since the present embodiment has the above-described configuration, outside air is introduced from the air intake port 5, passes through the intake passage 7, and a part of the air flows down from the opening 21, passing around the generator 2 and gas turbine 1. circulation, bulkhead 13
Then, the oil cooler ventilation passage 14
The entire amount passes through the oil cooler 15 and is discharged into the atmosphere by the suction fan 6 through a duct (not shown). Further, the remainder of the outside air flowing through the intake passage 7 is introduced into the combustor via the compressor of the gas turbine 1.

Incidentally, in this embodiment, the case where the device is installed in a basement has been explained, but the case where this is changed to be installed on a rooftop will be explained. That is, in the gas turbine 1 for installation in a basement, exhaust gas discharged from a combustor is guided to a flue through a silencer (not shown) and is emitted to the atmosphere. In this case, the exhaust gas passes through a part with large exhaust resistance, and therefore its flow velocity decreases.Moreover, it is difficult to secure a gap for the use of an ejector for exhaust gas, so the ejector effect using exhaust gas is used. , it is not possible to ventilate the entire enclosure 4. Therefore, the entire enclosure 4 is actively ventilated by the suction fan 6. On the other hand, when changing to a rooftop power generation facility, the exhaust passage 17 is removed and the ejector pipe 22 (see Figure 2) is attached there, the suction fan 6 is also removed, and a blind cover is installed here. Make it. Therefore, ventilation for cooling the entire enclosure 4 is performed by the ejector effect of the exhaust gas discharged from the combustor. That is, when changing from a basement installation to a rooftop installation, the partition wall 13 and oil cooler 15 are left as they are without making any changes, so there is no need to make special specifications for these parts.

Although not shown in FIG. 1, noise can be suppressed by attaching a muffler directly below the suction fan 6.

〔Effect of the invention〕

The present invention can exhibit the following effects.

Since the oil cooler is installed near the combustor of the gas turbine, there is no risk of fire or the like even if oil leaks.

Since the oil cooler is attached to the bulkhead, all ventilation of the entire enclosure passes through the oil cooler, ensuring good cooling in both indoor and outdoor specifications, and the oil cooler is directly attached to the entire enclosure. Therefore, even if the entire enclosure is changed, there is no need to change the oil cooler specifications.

In particular, depending on whether the fully enclosed gas turbine power generation equipment is installed indoors or outdoors, the gas turbine exhaust passage can be simply replaced with an ejector pipe, and in either case, the specifications can be maintained as is. , the entire amount of ventilation can pass through the oil cooler, and there is no need to change the location of the oil cooler.

Since the entire enclosure body can be used for both purposes, mass production is possible.
Moreover, since it can be assembled according to each site, an inexpensive overall enclosure can be provided.

[Brief explanation of drawings]

1 is a partially cutaway front view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a partially cutaway side view seen from direction A in FIG. 1. 1...Gas turbine, 2...Entire enclosure, 13
...Bulkhead, 15...Oil cooler.

Claims (1)

[Claims] 1. A power generation facility using a gas turbine 1 surrounded by an entire enclosure 4, in which a partition wall 13 is provided near the junction of the combustor and compressor of the gas turbine 1, and the entire enclosure 4 is In addition, an air-cooled oil cooler 15 is attached to the gas turbine side of the partition wall, and the ventilation flow inside the entire enclosure 4 is passed through the oil cooler 15. In the power generation equipment, the gas turbine exhaust passage 17 protruding from the overall enclosure 4 and the ejector pipe 22 are replaceable, and the oil cooler 15
This is a completely enclosed type gas turbine type power generation equipment for both indoor and outdoor use, in which the ventilation flow passing through the oil cooler 15 is sucked by a fan 6 which is detachable and installed at the place where the ventilation comes out.