Offshore steam turbine generator unit and installation method

Abstract

A steam turbine generator unit is disclosed. The steam turbine generator unit comprises a lower deck, an upper deck, and a steam turbine generator. The steam turbine generator is installed on the lower deck and the upper deck. The steam turbine generator unit also comprises at least three coupling members intended to be arranged on at least two parallel beams. A method for installing the steam turbine generator unit is also disclosed.

Description

[Technical field]

[0001] The present disclosure relates to a steam turbine generator unit intended to be installed on an offshore installation, and a method for installing the steam turbine generator unit. Summary of the Invention [Problem to be solved by the invention]

[0002] Steam turbines are installed on either onshore and offshore platforms, the latter being primarily used to extract gas from deposits located below the seabed.

[0003] The installation of a steam turbine on an offshore platform requires a significant amount of time due to the large number of devices and auxiliary components that must be installed and adapted to the specific location where the steam turbine must be located.

[0004] Additionally, offshore platforms are space constrained and typically require a reduced footprint. Steam turbines typically occupy a certain amount of space, so reducing their footprint would be welcomed in the industry.

[0005] Also, as mentioned above, with steam turbines, it is expected that a large number of auxiliary equipment will be shipped in a disassembled state and installed directly on site by the customer. Typically, the installation of a steam turbine can count up to 10-15 main parts, excluding pipelines and other elements for connecting such main parts. Also, the installation of the steam turbine needs to be done on site. This significantly increases the complexity and inevitably increases the overall installation cost. It can be seen that a significant amount of time is required to install the turbine, including connecting all the different equipment.

[0006] Furthermore, because the steam condenser is typically located under the main skid, the exhaust duct connecting the steam turbine to the condenser can suffer from fatigue phenomena that can lead to over-designing of the duct itself.

[0007] Both approaches have a negative impact on the operational costs of the installation effort. Therefore, an improved small steam turbine installation that can overcome the limitations of prior art implementations would be welcomed in the art. [Means for solving the problem]

[0008] In one aspect, the subject matter disclosed herein is directed to a steam turbine generator unit, preferably intended to be installed on an offshore platform comprising a lower deck and an upper deck, the upper deck being coupled to the lower deck, and the steam turbine generator being installed on the upper deck.

[0009] In another aspect, disclosed herein is that the supports of the upper deck may be Anti Vibrations Mounts (AVMs) and / or spherical joints, which may also compensate and dampen possible vibrations.

[0010] In another aspect, disclosed herein is a steam turbine's main steam condenser, gland steam condenser, and other auxiliary equipment pre-installed on a lower deck frame.

[0011] In another aspect, a steam turbine generator is disclosed herein that includes a steam turbine and generator pre-installed on an upper deck base platform.

[0012] In one aspect, the subject matter disclosed herein is directed to an exhaust duct connected to a mating flange of a condenser and a steam turbine via a flexible expansion joint.

[0013] A further aspect of the disclosure relates to a method of installing a steam turbine generator unit, comprising aligning the lower deck in an installation position before lowering the upper deck such that the upper deck of the base plate is located at three points on at least two beams of the offshore platform by three joint members of the upper deck, then lifting the lower deck off the ground and connecting the lower deck to the upper deck.

[0014] In another aspect, disclosed herein is that the lower deck is pre-lowered onto temporary supports and placed on the ground, after which the support beams are realized on the offshore platform.

[0015] In a further aspect, disclosed herein is the ability for the lower deck to slide under the support beams of already available offshore platforms. [Brief description of the drawings]

[0016] A complete understanding of the disclosed embodiments of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, in which: [Figure 1] FIG. 1 illustrates a perspective view of a steam turbine generator module according to a first embodiment. [Diagram 2] FIG. 2 illustrates a side view of a steam turbine generator module according to a first embodiment. [Diagram 3] FIG. 3 illustrates a cutaway perspective view of a steam turbine generator module according to a first embodiment. [Figure 4] FIG. 4 illustrates a plan view of the underside of the base platform of the steam turbine generator module according to the first embodiment. [Diagram 5] FIG. 5 illustrates a first perspective view of a steam turbine generator module according to a second embodiment. [Figure 6]FIG. 6 illustrates a second perspective view of a steam turbine generator module according to a second embodiment. [Figure 7] FIG. 7 illustrates a side view of a steam turbine generator module according to a second embodiment. [Figure 8] FIG. 8 illustrates the lower deck of a steam turbine generator unit where the condenser is foreseen. [Figure 9] FIG. 9 illustrates a detail of FIG. [Figure 10] FIG. 10 illustrates the lifting of the condenser. [Figure 11] FIG. 11 illustrates the placement of roller skates under the condenser to allow the condenser to slide on the track. [Figure 12A] FIG. 12A illustrates roller skating on a track. [Figure 12B] FIG. 12B illustrates a bottom perspective view of the roller skate. [Figure 12C] FIG. 12C illustrates details of the roller skate of FIG. 12B. [Figure 13] FIG. 13 illustrates the blocking of the condenser in a particular opposing position. [Figure 14] FIG. 14 illustrates a detail of FIG. [Figure 15] FIG. 15 illustrates the installation of a hydraulic actuator on a fixed track. [Figure 16] FIG. 16 illustrates the operation of the hydraulic actuator of FIG. [Figure 17] FIG. 17 illustrates the joining of two removable tracks. [Figure 18] FIG. 18 illustrates the installation and removal positions of the condenser. [Figure 19] FIG. 19 illustrates a flow chart of a first method of installing a steam turbine generator module. [Figure 20] FIG. 20 illustrates the first step of the method of FIG. [Figure 21] FIG. 21 illustrates a second step of the method of FIG. [Figure 22] FIG. 22 illustrates the third step of the method of FIG. [Figure 23] FIG. 23 illustrates the fourth step of the method of FIG. [Figure 24] FIG. 24 illustrates the fifth step of the method of FIG. [Diagram 25] FIG. 25 illustrates a flow chart of a second method of installing a steam turbine generator module. [Figure 26] FIG. 26 illustrates the first step of the method of FIG. [Figure 27] FIG. 27 illustrates a second step of the method of FIG. [Figure 28] FIG. 28 illustrates the third step of the method of FIG. [Figure 29] FIG. 29 illustrates the fourth step of the method of FIG. [Diagram 30] FIG. 30 illustrates the fifth step of the method of FIG.

[0017] In the various drawings, the same elements are designated by the same reference numbers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Offshore platforms and onshore sites use steam turbines to generate energy. With particular reference to offshore platforms, the steam turbine must be transported and then installed on the platform. The steam turbine is a very complex plant, the installation of which requires a great deal of time and skill. According to one aspect, the subject matter is directed to a steam turbine generator unit, comprising a steam turbine and all the equipment and parts for the steam turbine to operate and generate energy, distributed on two independent modules or decks, namely a lower deck and an upper deck. Both the lower deck and the upper deck are pre-mounted and independently transportable. The upper deck has coupling members intended to be arranged across at least two beams, such that the lower deck, on which the heavy parts of the steam turbine plant are arranged, is coupled or suspended from the upper deck, thus achieving significant space savings.

[0019] Referring now to the drawings, Figures 1, 2 and 3 show a perspective view of a steam turbine generator unit, designated by the reference numeral 1, intended to be installed on an offshore platform (not shown).

[0020] The steam turbine generator unit 1 is equipped with all the components necessary for the steam turbine to operate. It is designed to be easily connected to pre-installed equipment on the offshore platform. In other words, the steam turbine generator unit 1 is designed to be connected by suitable pipelines and powered so that it is immediately operational with minimal effort to adapt it to specific technical requirements or circumstances.

[0021] The steam turbine generator unit 1 comprises an upper deck 3 and a lower deck 2 which may be located below and coupled to the upper deck 3 .

[0022] The lower deck 2 comprises a frame 21, which includes two main cross members 211 arranged in parallel and a set of lateral cross members 212 arranged in parallel to each other and connected to the main cross members 211, forming a kind of bottom base and capable of supporting even a large weight. The frame 21 also comprises a number of uprights 213 having ends fixed or welded to the cross members 211 or 212.

[0023] The frame also includes a shelf 214 connected between the two uprights 213, on which possible devices can be placed.

[0024] The steam turbine plant, generally indicated by the reference numeral 4, is installed on the above-mentioned lower deck 2 and upper deck 3, distributing the components of the plant 4 in order to minimize the footprint of the steam turbine generator unit 1 and at the same time simplify its installation.

[0025] More specifically, the lower deck 2 is Bottom It comprises a condenser 41 having at least two supports 411 removably fixed to the lateral cross members 212 of the frame 21 of the deck 2, and a connecting flange 412, the operation of which will be described in detail below. It can be seen that the condenser 41 is mounted at the bottom of the steam turbine generator unit 1 due to its weight and footprint.

[0026] The lower deck 2 also comprises a gland steam condenser 42 which, as is known, maintains a sub-atmospheric pressure at the outermost leak-off belt of the gland, thereby preventing leakage of steam from the gland into the turbine hall.

[0027] Also installed on the lower deck 2 are an exhaust duct 43A and a flexible expansion joint 43B for the steam turbine generator 4. The exhaust duct 43A is removably coupled to the condenser 41 via a flange 412. The expansion joint 43B connects the exhaust duct 43A to the steam turbine, as will be described in more detail below.

[0028] The expansion joint 43B absorbs the relative displacement between the steam turbine generator 44 and the condenser 41. The layout of the steam turbine generator unit 1, as described in more detail below, is as follows: exhaust It also limits fatigue effects on the duct 43A and the expansion joint 43B. Furthermore, the condenser 41 can be installed with the connection axis of the exhaust duct 43A aligned or offset which can be restored with a suitable transition duct (not shown). The expansion joint 43B is also suitable for installation when the steam turbine generator unit 1 is installed on an offshore platform. However, as is known, it is affected by the ocean. , to compensate for possible misalignment between the condenser 41 and the steam turbine generator 44 that may be caused by sea movements. Also, the expansion joint 43B is for compensating for thermal expansion of the exhaust duct 43A.

[0029] above The lower deck 3 comprises a base plate 31, which in this embodiment is made of stainless steel, but which can also be made of other metals or materials having similar mechanical properties. The base plate 31 has a lower surface 311 facing the main cross-members 211 and the transverse cross-members 212, and an upper surface 312 opposite the lower surface 311, on which some components of the steam turbine plant 4 are installed, as will be explained in more detail below. The base plate 31 is fixed to the ends of the uprights 213 of the frame 21 of the lower deck 2.

[0030] The steam turbine generator unit 1 is disposed and installed on the lower surface 311 of the base plate 31. The three joint members 5 are connected to the upper deck 3. and the lower deck 2 disposed below the base plate 31. The three joint members 5 also function to reduce and damp vibrations that may occur due to natural movements of the offshore platform on which the steam turbine generator unit 1 is installed.

[0031] The three joint members 5 are not aligned. , Western It is intended to be placed on at least one pair of parallel beams B which are part of the upper platform. , the base plate 31 is disposed on the parallel beams B.The lower deck 2 is then formed below the two beams B, i.e. by the beams B surface More specifically, two beams B pass between the lower deck 2 and the upper deck 3 and support the weight of the entire steam turbine generator unit 1, which is supported on three coupling members 5. This positioning allows considerable space and obstruction savings, especially on offshore platforms.

[0032] This configuration may also be used with a single lift arrangement (if the module layout allows) or with a direct connection to the lower deck 2 on-site. above Suitable for separate installation on deck 3.

[0033] With further reference to Figures 1, 2 and 3, it is possible to see only two anti-vibration mounts 5. In the embodiment in question, the three joint members are anti-vibration mounts (AVM) 5. In other embodiments, the joint members 5 may be spherical joints.

[0034] With reference to FIG. 4 it can be seen how the three coupling members 5 are distributed on the lower surface 311 of the base plate 31 in order to obtain a three-point (isostatic) configuration. In this embodiment, the three coupling members 5 are arranged to form a triangle. In FIG. 4, two coupling members 5 rest on the first beam B (the beam is drawn in dashed lines) and the third coupling member 5 rests on the other parallel beam B. With this configuration, the steam turbine generator unit 1 is firmly positioned on the two beams B. Naturally, a different number of coupling members 5 can be foreseen so as to increase the stability of the system with respect to the parallel beams B. The three-point displacement, as mentioned above, makes it possible to achieve a three-point isostatic configuration, i.e. the mechanical system has a number of degrees of constraint equal to the number of its degrees of freedom. The layout shown also allows optimal maintenance of the steam turbine generator unit 1.

[0035] 1, 2 and 3, the steam turbine plant 4 also includes a steam turbine 44 mounted on the base plate 31, in particular on the upper surface 312 of the base plate 31. The steam turbine 44 is connected to an expansion joint 43B and an exhaust duct 43A, and is connected to the condenser 41 via the exhaust duct 43A. The steam turbine plant also includes a generator 45 equipped with a cooler (air or water cooler) 451, which is also mounted on the upper surface 312 of the base plate 31 adjacent to the steam gas turbine 44, and is connected to the steam gas turbine 44.

[0036] The steam turbine plant 4 is also equipped with a lubricating oil console 46, which is also installed on the upper surface 312 of the base plate 31 and connected to the steam gas turbine 44 by piping and valves not specifically described here. The exhaust duct 43A is designed to fit the connection between the condenser 41 and the steam gas turbine 44. In this way, when the lower module 3 is installed above the lower deck 2, the exhaust duct 43A is immediately connected, avoiding fitting problems that often involve a considerable waste of time in the installation procedure.

[0037] The upper deck 3 and the lower deck 2 of the steam turbine generator unit 1 form two pre-mounted sub-units, which can be transported independently and installed and connected autonomously. More specifically: , steamed an air turbine 44, a generator 45, a lubricating oil console 46, and Fixed to the underside of the base plate 31 The upper deck 3, made up of three joint members 5, forms the first or upper pre-mounted module, which can be transported on an offshore platform.

[0038] The lower deck 2, consisting of the frame 21, the condenser 41, the gland steam condenser 42 and the exhaust duct 43A, forms a second or lower pre-mounted module, which can be transported on the offshore platform independently of the first or upper pre-mounted module.

[0039] In some embodiments, the condenser 41 may be transported independently of other parts of the lower deck 2, taking into account the encumbrance and weight of this component. Details of the mode of transportation and installation of the steam turbine generator unit 1 and then the steam turbine plant 4 are provided below.

[0040] Typically, the upper deck 3 is then placed on a pair of parallel beams B that are part of the structure of the offshore platform, and two joint members 5 are placed on the first beam B and the other joint member 5 is placed on the other beam B. The upper deck 3 and the lower deck 2 are then connected, after which an expansion joint 43B connects the exhaust duct 43A and the steam turbine generator 44.

[0041] Finally, the piping, valves, other electrical connections, and other auxiliary components necessary for operation of the steam turbine plant 4 are connected and tested.

[0042] The ease of installation of the steam turbine generator unit 1 is evident; it is only necessary to combine the two decks one above the other and connect the remaining components in order to operate the steam turbine plant 4. The lower deck 2, in particular the condenser 41, is then suspended below the upper deck 3. The upper deck 3 is then supported by beams B.

[0043] This solution allows maintenance to be carried out on the lower deck 2 so that major items can be carried out using overhead monorails, davits or with sliding structures installed below the equipment.

[0044] To increase the stability of the system relative to the parallel beams B, a different number of coupling members 5 can be envisaged.

[0045] In addition to being compact, the layout also shows that it allows optimal maintenance of the steam turbine generator unit 1 .

[0046] 5, 6 and 7, a second embodiment of the steam turbine generator unit 1 is illustrated, in which it is possible to see in particular the installation of the condenser 41. More specifically, in this embodiment, the frame 21 comprises two fixed tracks 215 and two removable tracks 216 on which the condenser 41 is installed.

[0047] The condenser 41 in Figures 5, 6 and 7 is shown in two different positions, a take-out position where the condenser is designated by reference numeral 41' and where any maintenance work can be performed on the condenser, and an installed position where the condenser is designated by reference numeral 41. As the condenser 41 passes from the take-out position to the installed position, the exhaust duct 43A is connected to the condenser 41 and the condenser 41 becomes hydrodynamically connected to the steam gas generator 44 via the expansion joint 43B. Also, to pass from the installed position to the take-out position, the condenser 41 can move on the fixed track 215 and the removable track 216, as will be described in more detail below. Removal of the removable track 216 reduces the overall footprint of the already installed deck.

[0048] With reference to Figures 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 and 18, the procedure for removing the condenser 41 is illustrated. More specifically, Figures 8 and 9 show that the supports 411 each have a saddle 4111 at the end by which it rests on the track 215 and a blocking bracket 4112 which blocks the cylinder 41 in place once it has reached the correct position.

[0049] In order to remove the condenser 41, it must first be lifted, therefore it is foreseen to install a hydraulic cylinder jack between the support 411 and the fixed track 215. In this way, the condenser 41 is lifted from the sliding saddle side.

[0050] Next, as seen in Figures 11, 12A, 12B and 12C, roller skates 4113 are attached under the condenser 41 so that they can slide on the fixed track 215. The roller skates 4113 are roller devices capable of supporting a large weight, allowing them to slide. After that (see Figures 13 and 14), the condenser 41 is lowered until the roller skates 4113 contact the fixed track 215 and the front and rear longitudinal locking brackets 414, holding the condenser 41 in place. The longitudinal locking brackets 414 are each connected by a bolt to the fixed track 215 or to the removable track 216, depending on the position of the condenser during the removal procedure.

[0051] With reference to Fig. 15, a hydraulic actuator 413 is installed on the fixed tracks 215 and connected to the support 411. By activating the hydraulic actuator 413, the condenser 41 can slide on the two fixed tracks 215 according to the direction of the arrow A (see Fig. 16). Also, a removable track 215 is added (see Fig. 17), so that the condenser 41 can pass from the installed position in Fig. 17 to the removed position in Fig. 18.

[0052] In particular, removal of the condenser 41 is performed according to the following procedure. -Install removable tracks 216; - removing the connecting bolts from all longitudinal locking brackets 414; - actuating the hydraulic actuator 413 with a translation speed not exceeding 5 m / min, typically with a stroke of about 250 mm; Once the stroke is complete, re-thread the four bolts for each locking bracket 414.

[0053] This procedure is repeated until the condenser 41 reaches the desired location on the removable track 216. The procedure for passing from the unloading position to the installation position is the same, just with these steps reversed.

[0054] 5, 6 and 7, the frame 21 of the lower deck 2 of the steam turbine generator unit 1 is provided with an additional shelf 217 on which the vacuum group 47 is mounted.

[0055] It can also be seen that the condenser 41 is connected to a cooling pipe 61 and the steam turbine 44 is connected to an extraction pipe 62 which passes through the lower deck 2 below the base plate 31, thus saving space.

[0056] Also visible is one of the three joint members 5, which is located on one of the beams B.

[0057] The disclosed steam turbine generator unit 1 structure is particularly advantageous due to its installation flexibility since it can be adapted to situations that may or may not require lower deck skidding.

[0058] More specifically, FIG. 19 shows a flow chart of a first method 7 of installation of a steam turbine generator unit 1, the steps of which are also illustrated in FIGS. 20, 21, 22, 23 and 24.

[0059] As mentioned above, the upper deck 3 and the lower deck 2 are pre-installed, i.e. realized and assembled in a factory and transported independently. In particular, the condenser 41 is installed on the lower deck 2 and all other parts of the steam turbine plant 4 are already installed on the upper deck 3 as well as on the lower deck 2. Thus, the upper deck 3 and the lower deck 2 are prepared in the factory.

[0060] The first installation method 7 is also used in particular when the beam B on which the steam turbine-generator unit 1 has to be arranged is not yet available.

[0061] Installation method 7 is where the temporary support is Workbench To be located between G and Lower Deck 2, WorkbenchIt includes a step 71 for lowering the lower deck 2 onto temporary supports S placed on G (see FIG. 20). Exhaust ducts 43A and expansion joints 43B are also installed.

[0062] Then, two (or more) parallel beams B are constructed (step 72, FIG. 21). As can be seen in FIG. 21, the parallel beams B occupy a part of the volume of the lower deck 2.

[0063] Next, in this step, the upper deck 3 is lowered (step 73, FIG. 23), and the base plate 31 is placed on the two parallel beams B. Specifically, the joint members 5 pre-installed on the base plate 31 are coupled to the beams B.

[0064] In the lifting step 74, the lower deck 2 is lifted up, typically by a jack (not shown). Workbench Lifting from G and connecting step 75 connects the lower deck 2 to the upper deck 3.

[0065] If the beam B is already available, a slightly different installation method can be performed. Figure 25 shows a second installation method 8 of the steam turbine-generator unit 1.

[0066] In this case, the first sliding step 81 of installation method 8 is performed, whereby the lower deck 2 is pushed into alignment under the beam B. In particular, the lower deck 2 is slid in by the carriage C, which places the lower deck 2 in the correct position under the beam B, as can be seen in FIG.

[0067] An installation step 82 involves installing accessories on the lower deck 2, such as plumbing valves, monorails, and ladders, as illustrated in FIG.

[0068] Next, similarly to step 73 of the first installation method 7, the upper deck 3 is lowered (FIG. 28, step 83). In this step, the base plate 31 is placed on the two parallel beams B. Specifically, the joint members 5 previously installed on the base plate 31 are coupled to the beams B.

[0069] Next, in a lifting step 84, the lower deck 2 is lifted, usually by means of a jack (not shown). Workbench G (see FIG. 29) and connect the lower deck 2 to the upper deck 3 in a connecting step 85 (see FIG. 30).

[0070] While aspects of the invention have been described in terms of various specific embodiments, it will be apparent to one of ordinary skill in the art that many modifications, changes, and omissions are possible without departing from the spirit and scope of the claims. In addition, unless otherwise specified herein, the order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments.

[0071] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are illustrated in the drawings. Each example is provided as an explanation of the present disclosure, not as a limitation of the present disclosure. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the scope or spirit of the present disclosure. References throughout this specification to "an embodiment" or "one embodiment" or "some embodiments" mean that a particular feature, structure, or characteristic described with respect to an embodiment is included in at least one embodiment of the disclosed subject matter. Thus, the appearance of the phrases "in an embodiment" or "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily referring to the same embodiment. Moreover, particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0072] When presenting elements of various embodiments, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be non-exclusive and mean that there may be additional elements other than the listed elements.

Claims

1. A steam turbine generator unit (1), comprising: A lower deck (2); an upper deck (3) coupled to the lower deck (2) and including a base plate (31) having a lower surface (311); a steam turbine generator (4), a portion of which is mounted on the upper deck (3); a steam turbine generator unit (1) comprising at least three coupling members (5) arranged on the lower surface (311) of the base plate (31) and configured to be arranged on at least two parallel beams (B), wherein the weight of the steam turbine generator unit (1) is supported by the at least three coupling members (5).

2. The steam turbine generator unit (1) according to claim 1, wherein the joint members (5) are anti-vibration mounts (AVMs) and / or spherical joints.

3. The lower deck (2) has a frame (21) having a plurality of uprights (213); The base plate (31) has the lower surface (311) and an upper surface (312), the ends of the uprights (213) of the frame (21) of the lower deck (2) are removably connectable to the lower surface (311) of the base plate (31); 3. The steam turbine generator unit (1) of claim 1 or 2, wherein a portion of the steam turbine generator (4) is mounted on the base plate (31) of the upper deck (3) and another portion of the steam turbine generator (4) is mounted on the frame (21) of the lower deck (2).

4. The lower deck (2) is Two main cross members (211) arranged parallel to each other; a set of lateral cross members (212) arranged parallel to each other and connected to said main cross member (211); The steam turbine generator unit (1) according to claim 3, wherein the plurality of uprights (213) have ends fixed to the main cross-members (211) or the transverse cross-members (212).

5. The steam turbine generator (4) comprises: a condenser (41) installed on the frame (21) of the lower deck (2), the condenser (41) having a connection flange (412); a gland steam condenser (42) installed on the frame (21) of the lower deck (2); The steam turbine generator unit (1) according to claim 3 or 4, wherein the condenser and the gland steam condenser (42) are pre-installed on the frame (21) of the lower deck (2).

6. The steam turbine generator (4) comprises: a steam turbine (44) installed on an upper surface (312) of the base plate (31) and arranged corresponding to the condenser (41); a generator (45) equipped with a cooler (451), the generator (45) being installed on the upper surface (312) of the base plate (31); The steam turbine generator unit (1) according to claim 5, wherein the steam turbine (44) and the generator (45) are pre-mounted on the base plate (31) of the upper deck (3).

7. The steam turbine generator (4) comprises: an exhaust duct (43A) connected to the connecting flange (412) of the condenser (41); 7. The steam turbine generator unit (1) of claim 6, further comprising an expansion joint (43B) connected between the exhaust duct (43A) and the steam turbine (44).

8. The steam turbine generator unit (1) according to any one of claims 5 to 7, wherein the condenser (41) comprises at least two supports (411) removably fixed to the frame (21).

9. The frame (21) is two fixed tracks (215) along which the condenser (41) can be installed; two removable tracks (216) that can be installed in succession with said fixed tracks (215); 9. The steam turbine generator unit (1) according to any one of claims 5 to 8, wherein the condenser (41) is adapted to pass on the two fixed tracks (215) and the two removable tracks (216) arranged in succession on the two fixed tracks (215) from an installation position installed on the lower deck (2) of the steam turbine generator unit (1) to a removal position where it is removed from the lower deck (2) of the steam turbine generator unit (1) to enable maintenance operations.

10. A method (7, 8) for installing a steam turbine generator unit (1), the steam turbine generator unit (1) comprising a lower deck (2) and an upper deck (3), the method (7, 8) comprising the steps of: A step (71, 81) of arranging the lower deck (2); A step (73) of lowering the upper deck (3), whereby the base plate (31) of the upper deck (3) is placed on at least two parallel beams (B) and at least three joint members (5) of the upper deck (3) pre-installed on the base plate (31) are coupled to the at least two parallel beams (B); Lifting (74, 84) the lower deck (2) from the work platform (G); and connecting (75, 85) said lower deck (2) to said upper deck (3).

11. The step (71) of arranging the lower deck (2) comprises a step (71) of lowering the lower deck (2) onto a temporary support (S) arranged on a work platform (G); The method (7) of claim 10, comprising the step (72) of providing at least two parallel beams (B).

12. The step (71) of arranging the lower deck (2) includes a sliding step (81) in which the lower deck (2) is pushed so as to be arranged under at least two beams (B), 11. The method (8) of claim 10, further comprising the step of installing (82) one or more attachments to the lower deck (2) selected from plumbing valves, a monorail, and a ladder.

13. 13. The method (8) according to claim 12, wherein the sliding step (81) is performed by sliding the lower deck (2) by a carriage (C) in order to place the lower deck (2) in the correct position under the at least two beams (B).

Images