A plant building (4) includes a building body (5) that has a first installation region (51) where a first rotary machine (2) is installed, a second installation region (52) where a second rotary machine (3) is installed, and a carrying in and out region (53) provided between the first installation region (51) and the second installation region (52) in a horizontal direction, a first overhead crane (6) that is disposed in the building body (5) and is capable of traveling above the first installation region (51) and above the carrying in and out region (53), and a second overhead crane (7) that is disposed at a height position different from a height position of the first overhead crane (6) in the building body (5) and is capable of traveling above the second installation region (52) and above the carrying in and out region (53).

TECHNICAL FIELD

The present invention relates to a plant building, a plant, and a combined-cycle plant.

Priority is claimed on Japanese Patent Application No. 2016-093624, filed on May 9, 2016, the content of which is incorporated herein by reference.

BACKGROUND ART

In a power plant, a rotary machine, such as a gas turbine, a steam turbine, and a generator connected to the gas turbine and the steam turbine, is accommodated in a building. For example, a building for a thermal power plant accommodating a plurality of power generation facilities each of which has a steam turbine and a generator coaxially connected to an end portion of the steam turbine is disclosed in PTL 1. The building is configured by a high building part, which covers a steam turbine portion and has a high ceiling, and a low building part, which covers a generator portion and has a low ceiling. A parallel rail type overhead crane is provided in the high building part. Instead of providing an overhead crane, a monorail is provided in the low building part.

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

Technical Problem

In the power generation facilities disposed in such a plant building, a component part is lifted and lowered by the overhead crane when performing operations such as inspection, repair, assembly, and disassembly. The plant building has a large size such that a space is secured above the power generation facilities in order to make sure that the traveling overhead crane is not interfered with.

In recent years, in order to increase the capacity of a power generation facility with an increase in the size of a plant, the size of each of a plurality of rotary machines such as a gas turbine and a steam turbine has increased. For this reason, a plant building where the plurality of rotary machines are mounted has an even larger size. However, it is desirable to reduce, even if only slightly, the size of the plant building.

The present invention provides a plant building, a plant, and a combined-cycle plant, which capable of reducing size.

Solution to Problem

According to a first aspect of the present invention, there is provided a plant building including a building body that has a first installation region where a first rotary machine is installed, a second installation region where a second rotary machine is installed, and a carrying in and out region provided between the first installation region and the second installation region in a horizontal direction, a first overhead crane that is disposed in the building body and is capable of traveling above the first installation region and above the carrying in and out region, and a second overhead crane that is disposed at a height position different from a height position of the first overhead crane in the building body and is capable of traveling above the second installation region and above the carrying in and out region.

In such a configuration, a component part of the first rotary machine and a component part of the second rotary machine can be carried out from the building body or be carried into the building body with the use of the carrying in and out region. As a result, the size of the building body can be reduced compared to a case where a region for carrying out or carrying in a component part is separately provided in the building body with respect to the first rotary machine and the second rotary machine.

According to a second aspect of the present invention, in the plant building of the first aspect, the first overhead crane may be capable of traveling only above a region excluding the second installation region.

In such a configuration, by making a location where traveling is unnecessary for the first overhead crane impossible to be traveled, a useless space in the plant building can be reduced.

According to a third aspect of the present invention, in the plant building of the first or second aspect, the second overhead crane may be capable of traveling only above a region excluding the first installation region.

In such a configuration, by making a location where traveling is unnecessary for the second overhead crane impossible to be traveled, a useless space in the plant building can be reduced.

According to a fourth aspect of the present invention, in the plant building of any one of the first to third aspects, the first rotary machine may have a first rotary shaft that is rotatable about a first axis, the second rotary machine may have a second rotary shaft that is rotatable about a second axis which is disposed so as to be parallel to the first axis and to be spaced apart from the first axis in the horizontal direction, the first overhead crane may be capable of traveling in the horizontal direction orthogonal to the first rotary shaft, and the second overhead crane may be capable of traveling in the horizontal direction orthogonal to the second rotary shaft.

In such a configuration, a space in the building body can be effectively used. Therefore, the size of the plant building can be further reduced.

According to a fifth aspect of the present invention, in the plant building of the fourth aspect, the first overhead crane may have a pair of first traveling rails extending in the horizontal direction orthogonal to the first rotary shaft, the second overhead crane may have a pair of second traveling rails extending in the horizontal direction orthogonal to the second rotary shaft, and the first traveling rails and the second traveling rails may overlap each other in a vertical direction above the carrying in and out region.

According to a sixth aspect of the present invention, in the plant building of any one of the first to fifth aspects, the second overhead crane may be disposed at a position lower than the first overhead crane, and the building body may have a first ceiling provided above the first overhead crane and a second ceiling provided above the second overhead crane at a position lower than the first ceiling.

In such a configuration, the heights of the building body on a first rotary machine side and a second rotary machine side can be made different from each other. Consequently, it can be prevented that the size of the building body in the vertical direction becomes excessively large by aligning with the size of one rotary machine.

According to a seventh aspect of the present invention, in the plant building of any one of the first to sixth aspects, the first rotary machine may have a first height dimension, which is a dimension from a floor of the building body in a vertical direction necessary for maintenance, the second rotary machine may have a second height dimension, which is a dimension from the floor of the building body in the vertical direction necessary for maintenance, and the second height dimension may be smaller than the first height dimension.

According to an eighth aspect of the present invention, there is provided a plant including the first rotary machine mounted in the first installation region, the second rotary machine mounted in the second installation region, and the plant building according to any one of the first to seventh aspects.

In such a configuration, the overall size of the plant can be reduced in order to make the size of the plant building smaller.

According to a ninth aspect of the present invention, there is provided a multi-shaft combined-cycle plant including the plant building according to any one of the first to seventh aspects, a gas turbine that is the first rotary machine mounted in the first installation region, a steam turbine that is the second rotary machine mounted in the second installation region, and a generator.

According to a tenth aspect of the present invention, there is provided a plant building including a building body that has a first installation region where a first rotary machine having a first rotary shaft rotatable about a first axis is installed and a second installation region where a second rotary machine having a second rotary shaft rotatable about a second axis, which is disposed so as to be parallel to the first axis and to be spaced apart from the first axis in a horizontal direction, is installed, a first overhead crane that is disposed in the building body and is capable of traveling above the first installation region in the horizontal direction orthogonal to the first rotary shaft, a second overhead crane that is disposed at a position lower than the first overhead crane in the building body and is capable of traveling above the second installation region in the horizontal direction orthogonal to the second rotary shaft, a first ceiling provided above the first overhead crane, and a second ceiling provided above the second overhead crane at a position lower than the first ceiling.

In such a configuration, the heights of the building body on a first rotary machine side and a second rotary machine side can be made different from each other. Consequently, it can be prevented that the size of the building body in the vertical direction becomes excessively large by aligning with the size of one rotary machine.

Advantageous Effects of Invention

According to the present invention, the size of the plant building can be reduced.

DESCRIPTION OF EMBODIMENTS

First Embodiment

A plant1of the embodiment includes a plurality of (two, in the embodiment) rotary machines. The plant1of the embodiment includes a first rotary machine2, a second rotary machine3, and a plant building4.

As illustrated inFIGS. 1 and 2, the first rotary machine2has a first rotary shaft21arotatable about a first axis O2. In the embodiment, the first rotary machine2has a gas turbine21, which has the first rotary shaft21a, and a first generator22connected to the first rotary shaft21a. The first rotary shaft21ais connected to each of a rotor of a compressor of the gas turbine21and a rotor of a turbine such that the rotor of the compressor of the gas turbine and the rotor of the turbine rotate about the same axis. The first rotary shaft21ais located on the same straight line with a rotor of the first generator22, and is connected to the rotor of the first generator. The first rotary machine2has a first height dimension as a dimension from a floor of a building body5in a vertical direction Dv, which is necessary for maintenance and is to be described later.

In the embodiment, a direction where the first axis O2extends is referred to as an axial direction Da. A horizontal direction orthogonal to the first axis O2is referred to as an orthogonal direction Dh.

The second rotary machine3has a second rotary shaft31arotatable about a second axis O3. The second rotary machine3of the embodiment has sizes in the vertical direction Dv and the orthogonal direction Dh that are smaller than those of the first rotary machine2. The second axis O3is disposed so as to be parallel to the first axis and to be spaced apart in the horizontal direction from the first axis O2. That is, the second rotary shaft31aextends in the same direction as the first rotary shaft21a. The second rotary shaft31ais disposed so as to be spaced apart from the first rotary shaft21ain the orthogonal direction Dh. The second rotary machine3has a second height dimension as a dimension from the floor of the building body5in the vertical direction Dv, which is necessary for maintenance and is to be described later. The second height dimension of the embodiment is smaller than the first height dimension since the second rotary machine3is smaller than the first rotary machine2.

In the embodiment, the second rotary machine3has a steam turbine31, which has the second rotary shaft31a, and a second generator32connected to the second rotary shaft31a. The second rotary shaft31ais located on the same straight line with a rotor of the second generator32, and is connected to the rotor of the second generator.

The plant building4accommodates a plurality of (two, in the embodiment) rotary machines. The plant building4of the embodiment covers the first rotary machine2and the second rotary machine3. The plant building4includes the building body5, a first overhead crane6, and a second overhead crane7.

The building body5covers the first rotary machine2and the second rotary machine3. The building body5has a first installation region51, a second installation region52, and a carrying in and out region53.

The first installation region51is a region where at least a part of the first rotary machine2inside the building body5is mounted. The first installation region51is a space from the floor of the building body5, which is necessary for maintenance of the first rotary machine2. The vertical height of the first installation region51is larger than the first height dimension of the first rotary machine2, and is lower than a position where the first overhead crane6to be described later is mounted. It is sufficient that the widths of the first installation region51in the axial direction Da and the orthogonal direction Dh are larger than the widths of the first rotary machine2in the axial direction Da and the orthogonal direction Dh. Therefore, the first installation region51of the embodiment is a space larger than a space where the gas turbine21is mounted. When seen from above in the vertical direction Dv, the first installation region51spreads in the horizontal direction with the first axis O2as a center of the orthogonal direction Dh.

The second installation region52is a region where at least a part of the second rotary machine3inside the building body5is mounted. The second installation region52is a space from the floor of the building body5, which is necessary for maintenance of the second rotary machine3. The vertical height of the second installation region52is larger than the second height dimension of the second rotary machine3, and is lower than a position where the second overhead crane7to be described later is mounted. It is sufficient that the widths of the second installation region52in the axial direction Da and the orthogonal direction Dh are larger than the widths of the second rotary machine3in the axial direction Da and the orthogonal direction Dh. Therefore, the second installation region52of the embodiment is a space larger than a space where the steam turbine31is mounted. When seen from above in the vertical direction Dv, the second installation region52spreads in the horizontal direction with the second axis O3as a center of the orthogonal direction Dh.

The carrying in and out region53is a region provided between the first installation region51and the second installation region52in the horizontal direction. Neither the first rotary machine2nor the second rotary machine3are mounted in the carrying in and out region53. The carrying in and out region53is a space from the floor of the building body5, which is necessary for carrying a large-scale component part into or out from the building body5at the time of performing operations with respect to the first rotary machine2or the second rotary machine3such as inspection, repair, assembly, and disassembly. The carrying in and out region53is a space interposed between the first installation region51and the second installation region52in the building body5. The carrying in and out region53is connected to a carrying out path55outside the building body5.

As illustrated inFIG. 3, the building body5has a ceiling54that covers the upper side of the first rotary machine2and the second rotary machine3. The building body5of the embodiment has a first ceiling541and a second ceiling542as the ceiling54.

The first ceiling541covers the upper side of the first rotary machine2. The first ceiling541covers the upper side of the first installation region51and the carrying in and out region53. The first overhead crane6is provided on the first ceiling541. That is, the first ceiling541is provided above the first overhead crane6.

The second ceiling542covers the upper side of the second rotary machine3. The second ceiling542covers only the upper side of the second installation region52. The second ceiling542is disposed at a height position different from that of the first ceiling541. Specifically, the second ceiling542is disposed at a position having a height in the vertical direction Dv lower than that of the first ceiling541. The second overhead crane7is provided on the second ceiling542. That is, the second ceiling542is provided above the second overhead crane7.

As illustrated inFIGS. 2 and 3, the first overhead crane6is disposed in the building body5. The first overhead crane6is capable of traveling above the first installation region51and above the carrying in and out region53in the horizontal direction.

The first overhead crane6is capable of traveling only above a region excluding the second installation region52and is capable of traveling only above a region close to the first installation region51with respect to the second installation region52. The first overhead crane6of the embodiment is capable of traveling only above the first installation region51and above the upper side of the carrying in and out region53. The first overhead crane6is capable of traveling in the orthogonal direction Dh and the axial direction Da. The first overhead crane6has a pair of first traveling rails61, a first girder62, and a first hoist63. The pair of first traveling rails61is supported by a pillar, a wall, a ceiling, or the like of the building body5.

The pair of first traveling rails61extends in the orthogonal direction Dh in a state of being parallel to each other. The pair of first traveling rails61is provided on both sides of the first ceiling541in the axial direction Da, respectively. That is, when seen from above in the vertical direction Dv, the first traveling rails61extend so as to straddle the first installation region51and the carrying in and out region53, and are disposed at an interval in the axial direction Da.

The first girder62is a beam member extending in the axial direction Da so as to straddle the pair of first traveling rails61. The first girder62is capable of traveling a region including the upper side of the gas turbine21in the orthogonal direction Dh along the first traveling rails61. Each of both end portions of the first girder62in the axial direction Da is supported by the first traveling rails61so as to be capable of traveling.

The first hoist63is capable of traveling a region including the upper side of the gas turbine21in the axial direction Da along the first girder62. The first hoist63is attached to the first girder62so as to be capable of traveling. The first hoist63has a lifting sling for lifting or lowering a component part of the first rotary machine2.

The second overhead crane7is disposed at a height position different from that of the first overhead crane6in the building body5. The second overhead crane7is capable of traveling above the second installation region52and above the carrying in and out region53in the horizontal direction.

The second overhead crane7is capable of traveling only above a region excluding the first installation region51and is capable of traveling only above a region close to the second installation region52with respect to the first installation region51. The second overhead crane7of the embodiment is capable of traveling only above the second installation region52and above the carrying in and out region53. The second overhead crane7is capable of traveling in the orthogonal direction Dh and the axial direction Da. The second overhead crane7is disposed at a position lower than the position of the first overhead crane6in the vertical direction Dv. The second overhead crane7has a pair of second traveling rails71, a second girder72, and a second hoist73. The pair of second traveling rails71is supported by a pillar, a wall, a ceiling, or the like of the building body5.

The pair of second traveling rails71extends in the orthogonal direction Dh in a state of being parallel to each other. The pair of second traveling rails71is provided on both sides of the second ceiling542in the axial direction Da, respectively. That is, when seen from above in the vertical direction Dv, the second traveling rails71extend so as to straddle the second installation region52and the carrying in and out region53, and are disposed at an interval in the axial direction Da. The second traveling rails71are disposed so as to be spaced apart from the first ceiling541and the second ceiling542above the carrying in and out region53. Consequently, the first traveling rails61and the second traveling rails71overlap each other in the vertical direction Dv above the carrying in and out region53.

The second girder72is a beam member extending in the axial direction Da so as to straddle the pair of second traveling rails71. The second girder72is capable of traveling a region including the upper side of the steam turbine31in the orthogonal direction Dh along the second traveling rails71. Each of both end portions of the second girder72in the axial direction Da is supported by the second traveling rails71so as to be capable of traveling.

The second hoist73is capable of traveling a region including the upper side of the steam turbine31in the axial direction Da along the second girder72. The second hoist73is attached to the second girder72so as to be capable of traveling. The second hoist73has a lifting sling for lifting or lowering a component part of the second rotary machine3.

When performing operations with respect to the first rotary machine2or the second rotary machine3, such as inspection, repair, assembly, and disassembly, the first rotary machine2or the second rotary machine3, which is a target, is stopped in the plant1of the embodiment.

When performing an operation with respect to the first rotary machine2, the first overhead crane6, which is capable of traveling only above the first installation region51and above the carrying in and out region53in the orthogonal direction Dh and the axial direction Da, is used. Specifically, an operation of lifting and lowering a component part of the first rotary machine2is performed by the first overhead crane6, and the component part is conveyed to the carrying in and out region53. As a result, the component part of the first rotary machine2can be carried out from the carrying out path55to the outside of the building body5, or can be carried in from the outside via the carrying in and out region53.

When performing an operation with respect to the second rotary machine3, the second overhead crane7, which is capable of traveling only above the second installation region52and above the carrying in and out region53in the orthogonal direction Dh and the axial direction Da, is used. Specifically, an operation of lifting and lowering a component part of the second rotary machine3is performed by the second overhead crane7, and the component part is conveyed to the carrying in and out region53. As a result, the component part of the second rotary machine3can be carried out from the carrying out path55to the outside of the building body5, or can be carried in from the outside via the carrying in and out region53.

That is, a component part of the first rotary machine2and a component part of the second rotary machine3can be carried out from the building body5or be carried into the building body5by using the carrying in and out region53. As a result, the size of the building body5in the orthogonal direction Dh can be reduced compared to a case where a region for carrying out or carrying in a component part is separately provided in the building body5with respect to the first rotary machine2and the second rotary machine3.

In addition, the second ceiling542can be provided at a position lower than that of the first ceiling541by disposing the second overhead crane7at a position lower than that of the first overhead crane6. That is, the heights of the ceiling54of the building body5on a first rotary machine2side and a second rotary machine3side can be made different from each other. Therefore, the position of the ceiling54in the vertical direction Dv can be aligned with each of the first rotary machine2and the second rotary machine3. Consequently, it can be prevented that the size of the building body5in the vertical direction Dv becomes excessively large by aligning with the size of one rotary machine.

Therefore, the sizes of the building body5in the orthogonal direction Dh and the vertical direction Dv can be reduced, and thus the size of the plant building4can be reduced.

In addition, the first overhead crane6is not capable of traveling above the second installation region52since the first overhead crane is made to be capable of traveling only above the first installation region51and above the carrying in and out region53. For this reason, regardless of the size of the second rotary machine3in the vertical direction Dv, the position of the first ceiling541in the vertical direction Dv can be determined so as to be aligned with the size of the first rotary machine2in the vertical direction Dv. Therefore, by making a location where traveling is unnecessary for the first overhead crane6impossible to be traveled, a useless space in the plant building4can be reduced.

Similarly, the second overhead crane7is not capable of traveling above the first installation region51since the second overhead crane is made to be capable of traveling only above the second installation region52and above the carrying in and out region53. For this reason, regardless of the size of the first rotary machine2in the vertical direction Dv, the position of the second ceiling542in the vertical direction Dv can be determined so as to be aligned with the size of the second rotary machine3in the vertical direction Dv. Therefore, by making a location where traveling is unnecessary for the second overhead crane7impossible to be traveled, a useless space in the plant building4can be reduced.

Therefore, the first ceiling541and the second ceiling542can be provided so as to be independent of each other by being aligned with the first rotary machine2and the second rotary machine3respectively. That is, the positions of the building body5in the vertical direction Dv in the first installation region51and the second installation region52can be set independently of each other corresponding to the first rotary machine2and the second rotary machine3respectively. Consequently, the size of the plant building4can be further reduced.

The second installation region52is provided so as to be spaced apart from the first installation region51in the orthogonal direction Dh such that the first axis O2and the second axis O3are disposed to be parallel to each other and to be spaced apart from each other in the horizontal direction. In addition, the first traveling rails61and the second traveling rails71are allowed to overlap each other above the carrying in and out region53in the vertical direction Dv. That is, the first traveling rails61and the second traveling rails71can be disposed so as to be spaced apart from each other above the carrying in and out region53in the vertical direction Dv. In other words, when seen from above in the vertical direction Dv, the first traveling rails61and the second traveling rails71are disposed so as to overlap each other in a direction where the first traveling rails61extend. Consequently, a space in the building body5can be effectively used. Therefore, the size of the plant building4can be further reduced even when the first overhead crane6is provided such that only the first rotary machine2becomes a target and the second overhead crane7is provided such that only the second rotary machine3becomes a target.

In addition, the first rotary machine2and the second rotary machine3can be disposed so as to be spaced apart from each other in the orthogonal direction Dh with the carrying in and out region53interposed therebetween. For this reason, a space between the first rotary machine2and the second rotary machine3can be effectively used as the carrying in and out region53.

In addition, the overall size of the plant1can be reduced by mounting the first rotary machine2and the second rotary machine3in the plant building4.

Second Embodiment

Next, a plant of a second embodiment will be described with reference toFIG. 4.

In the second embodiment, the same constituent elements as those of the first embodiment will be assigned with the same reference signs and detailed description thereof will be omitted. The plant of the second embodiment is different from that of the first embodiment in that a first overhead crane and a second overhead crane do not overlap each other.

A plant1A of the second embodiment is different from that of the first embodiment in terms of a configuration of a plant building4A.

As illustrated inFIG. 4, the plant building4A accommodates two rotary machines as in the first embodiment. The plant building4A of the embodiment includes a building body5A, a first overhead crane6A, and a second overhead crane7A.

The building body5A covers the first rotary machine2and the second rotary machine3. The building body5A has the first installation region51and the second installation region52. The building body5A has a ceiling54A that covers the upper side of the first rotary machine2and the second rotary machine3. The building body5A of the embodiment has a first ceiling541A and a second ceiling542A as the ceiling54A.

The building body5A of the second embodiment is not limited to having the carrying in and out region in between the first installation region51and the second installation region52. For example, a space of the first installation region51on a side where the second rotary machine3is not mounted may be a space for carrying a large-scale component part into or out from the building body5at the time of performing operations such as inspection, repair, assembly, and disassembly. Similarly, a space of the second installation region52on a side where the first rotary machine2is not mounted may be a space for carrying a large-scale component part into or out from the building body5at the time of performing operations such as inspection, repair, assembly, and disassembly.

The first ceiling541A covers the upper side of the first rotary machine2. The first ceiling541A covers the upper side of a space between the first rotary machine2and the second rotary machine3from above the first installation region51. The first overhead crane6A is provided on the first ceiling541A. That is, the first ceiling541A is provided above the first overhead crane6A.

The second ceiling542A covers the upper side of the second rotary machine3. The second ceiling542A covers the upper side of a space between the first rotary machine2and the second rotary machine3from above the second installation region52. The second ceiling542A is disposed at a position having a height in the vertical direction Dv lower than that of the first ceiling541A. The second overhead crane7A is provided on the second ceiling542A. That is, the second ceiling542A is provided above the second overhead crane7A.

The first overhead crane6A is disposed in the building body5A. The first overhead crane6A is capable of traveling above the first installation region51in the horizontal direction. The first overhead crane6A has a pair of first traveling rails61A, the first girder62, and the first hoist63.

The pair of first traveling rails61A extends in the orthogonal direction Dh in a state of being parallel to each other. The pair of first traveling rails61A is provided on both sides of the first ceiling541A in the axial direction Da, respectively. That is, when seen from above in the vertical direction Dv, the first traveling rails61A extend so as to cross the first installation region51, and are disposed at an interval in the axial direction Da. The first overhead crane6A is disposed only below the first ceiling541A.

The second overhead crane7A is provided at a position lower than that of the first overhead crane6A in the building body5. The second overhead crane7A is capable of traveling above the second installation region52in the horizontal direction. The second overhead crane7A is disposed at a position lower than the position of the first overhead crane6A in the vertical direction Dv. The second overhead crane7A has a pair of second traveling rails71A, the second girder72, and the second hoist73.

The pair of second traveling rails71A extends in the orthogonal direction Dh in a state of being parallel to each other. The pair of second traveling rails71A is disposed on both sides of the second ceiling542A in the axial direction Da, respectively. That is, when seen from above in the vertical direction Dv, the second traveling rails71extend so as to cross the second installation region52, and are disposed at an interval in the axial direction Da. The second overhead crane7A is disposed only below the second ceiling542A. That is, the second traveling rails71A are provided so as not to overlap the first traveling rails61A in the vertical direction Dv. Therefore, when seen from above in the vertical direction Dv, the second traveling rails71are provided such that positions in the horizontal direction thereof do not overlap the positions of the first traveling rails61A in the horizontal direction.

In the plant building4A of the second embodiment, the second ceiling542A can be provided at a lower position than that of the first ceiling541A in accordance with the fact that the second overhead crane7A is disposed at a position lower than that of the first overhead crane6A. That is, the heights of the ceiling54A of the building body5A on the first rotary machine2side and the second rotary machine3side can be made different from each other. Therefore, the position of the ceiling54A in the vertical direction Dv can be aligned with each of the first rotary machine2and the second rotary machine3. Consequently, it can be prevented that the size of the building body5A in the vertical direction Dv becomes excessively large by aligning with the size of one rotary machine.

Hereinbefore, the embodiments of the present invention are described in detail with reference to the drawings. However, the respective configurations and combinations thereof in the respective embodiments are merely examples, and additions, omissions, substations, and other modifications of configurations are possible within the scope which does not depart from the gist of the present invention. In addition, the present invention is not limited to the embodiments and are limited by only claims.

Without being limited to having the gas turbine21, it is sufficient that the first rotary machine2is a rotary machine having the first rotary shaft21a. Similarly, without being limited to having the steam turbine31, it is sufficient that the second rotary machine3is a rotary machine having the second rotary shaft31a. Therefore, contrary to the embodiment, the first rotary machine2may have the steam turbine31, and the second rotary machine3may have the gas turbine21. In addition, the first rotary machine2or the second rotary machine3may have a pump.

In addition, as in the first embodiment, the plant building4is not limited to having the first ceiling541which has a position in the vertical direction Dv that is higher than that of the second ceiling542. It is sufficient that the first ceiling and the second ceiling are disposed at height positions different from each other. For example, the plant building4may have a structure where the first overhead crane6is disposed at a position in the vertical direction Dv lower than that of the second overhead crane7and the first ceiling541is at a position in the vertical direction Dv lower than that of the second ceiling542.

In each of the embodiments, a multi-shaft combined-cycle plant including a gas turbine, which is a first rotary machine mounted in a first installation region, a steam turbine, which is a second rotary machine mounted in a second installation region, a first generator connected to the gas turbine, a second generator connected to the steam turbine, a heat recovery steam generator connected to the gas turbine, and a condenser connected to the steam turbine may be adopted.

In addition, the first rotary machine may be the steam turbine, and the second rotary machine may be the gas turbine. In this case, a multi-shaft combined-cycle plant including a steam turbine, which is a first rotary machine mounted in a first installation region, a gas turbine, which is a second rotary machine mounted in a second installation region, a first generator connected to the steam turbine, a second generator connected to the gas turbine, a heat recovery steam generator connected to the gas turbine, and a condenser connected to the steam turbine may be adopted.

INDUSTRIAL APPLICABILITY

In the plant building, the plant, and the combined-cycle plant, the size of plant building can be reduced.

REFERENCE SIGNS LIST

1: plant2: first rotary machine21: gas turbineO2: first axis21a: first rotary shaft22: first generator3: second rotary machine31: steam turbineO3: second axis31a: second rotary shaft32: second generator4,4A: plant building5,5A: building body51: first installation region52: second installation region53: carrying in and out region54,54A: ceiling541,541A: first ceiling542,542A: second ceiling56: entrance for carrying out6,6A: first overhead crane61,61A: first traveling rail62: first girder63: first hoist7,7A: second overhead crane71,71A: second traveling rail72: second girder73: second hoistDv: vertical directionDa: axial directionDh: orthogonal direction