KR20160016886A - Modular Air Cooled Condenser Apparatus and Method - Google Patents

Abstract

The present invention relates to a mechanical ventilation cooling tower employing an air-cooled condenser module. The cooling tower described above operates by mechanical ventilation and generally achieves heat exchange between two fluids, such as steam, with the atmosphere and other fluids. The cooling tower described above utilizes a modular modular condenser concept wherein the air-cooled condenser utilizes a heat exchange delta that uses tube bundles manufactured and assembled prior to shipment to the tower site.

Description

Technical Field [0001] The present invention relates to a modular air-cooled condenser apparatus and method,

This application claims priority to U.S. Provisional Application Serial No. 61 / 828,076 entitled "Modular Air-Cooled Condenser Apparatus and Method", filed May 28, 2013, which is incorporated herein by reference in its entirety.

The present invention relates to a mechanical draft cooling tower using an air-cooled condenser module. The cooling tower described above operates by mechanical ventilation and exchanges heat between two fluids, i.e., ordinary atmospheric and steam or other fluids of a particular type of industrial process fluid. The cooling tower described above operates by mechanical ventilation using an airflow generator such as a fan.

Cooling towers are widely used types of heat exchangers for releasing low-grade heat to the atmosphere and are generally used in generators, air conditioning systems, and the like. In a mechanical ventilation cooling tower for the above-mentioned application, the airflow is induced or forced through an airflow generator, such as a drive impeller, a drive fan, or the like. The cooling tower may be dry or wet. The dry cooling tower is either "direct dry" in which the steam is directly condensed by the air passing through the heat-confined medium containing the steam, or it is primarily passed through the surface condenser where the steam is cooled by the fluid, , Where the fluid may be an " indirect dry "cooling tower that remains separate from the air, similar to a vehicle radiator. Dry cooling has the advantage of no loss of evaporation water. Both types of dry cooling towers emit heat by conduction and convection, and both types are currently in use. The wet cooling tower provides direct air contact to the fluid being cooled. Wet cooling towers benefit from the latent heat of vaporization, which has the disadvantage of circulating fluid evaporates in small quantities but provides very efficient heat transfer.

To achieve the required direct dry cooling, the condenser typically requires a large surface area to release thermal energy in the gas or vapor, and can often present various problems to the design engineer. It may often be difficult to direct vapors efficiently and efficiently throughout the interior surface area of the condenser due to the unevenness of the supply of steam due to system piping pressure loss and velocity distribution. Therefore, a uniform vapor distribution is desirable for air-cooled condensers and is important for optimum performance. Another problem or disadvantage is that it is desirable to provide a large surface area, while a pressure drop on the vapor side can be created, thereby increasing the back pressure of the turbine and thus reducing the efficiency of the power generation device. It is therefore desirable to have a capacitor with a strategic layout of the piping and condenser surfaces which reduces the back pressure taking into account the uniform distribution of the vapor across the condenser, while permitting the maximum cooling air flow across the condenser surface and the condenser surface .

Another disadvantage of current air-cooled condenser towers is that they are generally very labor intensive in their assembly at the shop floor. The assembly of such towers often requires a dedicated labor force to spend a lot of time. Thus, such assembly is labor intensive and therefore expensive, requiring a lot of time. Thus, it is desirable and more efficient to assemble most of the tower structure in a manufacturing plant or facility prior to shipment to the installation site.

Improving cooling tower performance (i.e., the ability to extract an increased amount of waste heat from a given surface) results in an improvement in the overall efficiency of the steam plant's heat to power conversion and / or in increased power output under certain conditions do. Moreover, cost-effective methods of manufacture and assembly also improve the overall efficiency of the cooling tower in terms of cost-effectiveness of manufacture and operation. Thus, cooling towers that are efficient in both heat exchange characteristics and assembly are desirable. The present invention addresses this desire.

Therefore, it is desirable to have a modular cooling tower, which is not only heat exchange characteristic but also economical and mechanical ventilation in terms of the time required for assembly and cost for the same.

Embodiments of the present invention advantageously provide a method for a fluid generally a vapor and a modular mechanical ventilation cooling tower for condensing the vapor.

An embodiment of the present invention is a method for assembling a modular air-cooled condenser extending along a vertical axis away from horizontal, comprising the steps of: providing a first set of tubes having first and second ends, Assembling a first condenser bundle assembly having a fold and a condensate header connected to a second end of the tube; Assembling a second condenser bundle having a second set of tubes having first and second ends, a vapor manifold coupled to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; Installing the first and second condenser bundle assemblies in a container; Transporting the container to a location where the modular air-cooled condenser is to be assembled; Assembling the heat exchange delta by installing the first condenser bundle and the second condenser bundle; And positioning the heat exchange delta on the modular tower frame.

Another embodiment of the present invention includes a modular air-cooled condenser extending away from the horizontal and extending along a vertical axis, comprising a first set of tubes having first and second ends, a steam manifold connected to the first end of the tubes, And means for assembling a first condenser bundle assembly having a condensate header connected to a second end of the tube; Means for assembling a second condenser bundle assembly having a second set of tubes having first and second ends, a vapor manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; Means for installing the first and second condenser bundle assemblies in a container; Means for transporting the container to a location where the modular air-cooled condenser is to be assembled; Means for assembling the heat exchange delta by installing the first condenser bundle and the second condenser bundle; And means for positioning the heat exchange delta on the modular tower frame.

As another embodiment of the present invention there is provided a mechanical ventilation modular air-cooled condenser for cooling an disclosed industrial fluid, comprising: a plenum in which at least one delta resides, the at least one delta comprising a first set of first and second sets of A first condenser bundle having a tube, a vapor manifold connected to a first end of the tube, and a condensate header connected to a second end of the tube, and a second set of tubes having first and second ends, A second condenser bundle having a vapor manifold connected to one end and a condensate header connected to a second end of the tube; A support frame supporting the plenum; And a shroud housing the airflow generator.

In another embodiment of the present invention, there is provided a method for assembling a modular water-cooled condenser extending along a vertical axis, the method comprising: providing a first set of tubes having first and second ends and a condensate header connected to a second end of the tube Assembling the first condenser bundle having the first condenser bundle; Assembling a second condenser bundle having a second set of tubes having first and second ends and a condensate header connected to a second end of the tube; Installing the first and second condenser bundles in a container; Transporting the container to a location where the modular air-cooled condenser is to be assembled; Assembling the heat exchange delta by installing the first condenser bundle and the second condenser bundle; And positioning the heat exchange delta on the modular tower frame.

Accordingly, certain embodiments of the invention have been described with rather broad emphasis so that the detailed description herein may be better understood and its contribution to the art may be better understood. Of course, there is a further embodiment of the invention which will form the subject matter of the claims set forth below and in the appended claims.

In this regard, before describing in detail at least one embodiment of the invention, it will be understood that the invention is not limited to the details of construction in the application and the following detailed description or the structure shown in the drawings. The invention can be practiced and carried out in various ways other than those described. It is also to be understood that the phraseology and terminology employed herein, including the abstract, is for the purpose of description and should not be regarded as limiting.

Accordingly, those skilled in the art will readily appreciate that the concepts on which this disclosure is based are readily utilized as a basis for the design of other structures, methods, and systems for performing several purposes of the present invention. It is important, therefore, that the claims be regarded as including such structure of equivalents unless they depart from the spirit and scope of the present invention.

The foregoing and other features and advantages of the present invention and the manner of achieving it will be better understood by reference to the following description of various embodiments of the invention taken in conjunction with the accompanying drawings.
1 is a top view of a power generating apparatus having a heat exchanger having an air-cooled condenser module according to an embodiment of the present invention.
2 is a front view of the air-cooled condenser module shown in FIG. 1 according to an embodiment of the present invention.
3 is a cross-sectional view of the air-cooled condenser module shown in FIG. 1 according to an embodiment of the present invention.
4 is a perspective view of the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention.
Figure 5 is a perspective view of a reinforced bay for the air-cooled condenser module shown in Figure 1 according to an embodiment of the present invention.
6 is a perspective view of a duct, a riser, and a middle truss for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention.
FIG. 7 is a perspective view of an assembled duct, riser, and middle truss for the air-cooled condenser module shown in FIG. 1 according to an embodiment of the present invention. FIG.
Figure 8 is a perspective view of an assembled duct, riser, and middle truss disposed on a reinforced bay for the air-cooled condenser module shown in Figure 1 in accordance with an embodiment of the present invention.
Figure 9 is a perspective view of an assembled duct, riser, and mid-truss over transverse structure disposed on a reinforced bay for the air-cooled condenser module shown in Figure 1 according to an embodiment of the present invention.
10 is a perspective view of a lateral truss for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention.
Figure 11 is a perspective view of a transverse truss and transverse structure on an assembled duct, riser, and middle truss disposed on a reinforced bay for the air-cooled condenser module shown in Figure 1 according to an embodiment of the present invention.
12 is a perspective view of a longitudinal truss for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention. Fig.
Figure 13 is a perspective view of a longitudinal truss, a transverse truss, and a transverse structure on an assembled duct, riser and middle truss disposed on a reinforced bay for the air-cooled condenser module shown in Figure 1 according to an embodiment of the present invention; to be.
14 is a perspective view of a bridge for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention.
Figure 15 is a perspective view of an assembled duct, riser, and bridge on a middle truss disposed on a reinforced bay for the air-cooled condenser module of Figure 1 according to an embodiment of the present invention, a longitudinal truss, a lateral truss, A perspective view of the structure.
16 is a perspective view of a partial arrangement of a header and a delta for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention.
17 is a perspective view of an air-cooled condenser module according to an embodiment of the present invention.
18 is a schematic side view of the air-cooled condenser module shown in FIG. 1 according to an embodiment of the present invention.
19 is another schematic side view of the air-cooled condenser module shown in FIG. 1 according to an embodiment of the present invention.
20 is a perspective view of an A-type capacitor arrangement according to an embodiment of the present invention.
Figure 21 illustrates a condenser bundle of a packaged arrangement for transport according to an embodiment of the present invention.
22 schematically shows an assembling step of the air-cooled condenser according to the embodiment of the present invention.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice them, and it will be understood that other embodiments may be utilized and structural, logical, processing and electrical changes may be made. It should be understood that the material or arrangement of elements is merely exemplary and is by no means exhaustive. The progress of the described processing steps is exemplary, but the order of the steps is not limited to that described herein, and may be altered as is known in the art, except where it is necessary to occur in a particular order.

The embodiments described herein provide a heat exchange system, a structure for an air-cooled condenser (ACC), and a method for constructing a support structure for an ACC. As described herein, some or all of these embodiments provide significant gains over the standard A-frame ACC. Examples of gains over the standard A-frame ACC include reduced cost of about 25%, improved construction, high annual output of the power plant, improved cleanliness due to the use of motorized cleaning shuttle standards, reduced height 32.6m) and a reduced visual impact due to the reduced occupied floor area and a reduced base (40 columns to 48 for A-frame ACC with equivalent power). This height reduction is due to the reduced height of the plurality of deltas described herein compared to conventional A-frame-type bundles with longer tubes and increased total height.

Specific examples of reduced cost and improved buildability include: a steam manifold and a steam condenser header already welded on a tube bundle with pins in a manufacturing plant; Less total weight of the steel structure (-25% vs. A-frame ACC); Lower total weight of ducting (-25% vs. A-frame ACC); A reduced number of bundles (25% for A-frame ACC); Fewer elements of the steel structure to be assembled into place by bolts (-50% vs. A-frame ACC); Reduced place weld length for ducting (-50% vs. A-frame ACC); A smaller number of lifting operations; Shorter construction period; Less activity at higher altitudes due to more pre-assemblies resulting in an improved total safety level; The need for less scaffolding; A higher proportion of pre-assembled piping and piping supports in the manufacturing plant on tube bundles with pins; The critical percentage assembled at the site is at the base level (Delta, Reason Duct, ...); No cleaning liner is required; It includes more containerized supplies.

Specific examples of the high annual output of a power generation device are: a lower backpressure during a low ambient temperature interval (e.g., below 9 ° C), resulting in a higher power output during a low temperature section; And a lower minimum back pressure (62 mbar versus 70 mbar for A-frame ACC) resulting in higher generation electrical production (+ 0.4% vs. A-frame ACC) on a yearly basis. More specifically, the back pressure can be reduced since the heat exchange tubes in the bundle (described herein) can be manufactured in shorter and larger numbers compared to the A-frame ACC. In this way, the total surface area can be equivalent while the velocity in the tube is reduced. Another advantage is that the reduced speed results in a corresponding reduction in corrosion of the tubing.

1 is a top view of a heat exchange system 10 having an air-cooled condenser module 12 according to an embodiment of the present invention suitable for use in a heat generation facility, such as power generation device 14. As shown in FIG. 1, the heat exchange system 10 includes a supply line 22, a riser 24, a header 26, an upper manifold 28, a coil or bundle 30, a fan 32, (20) for supporting other elements of the heat exchange system (10), such as a heat exchanger (34). The return line 36 is also configured to return the condensate to the power generation device 14. [

In use, power generation device 14 generates heat to generate steam to drive the turbine to develop in a manner generally known in the art. After the steam passes through the turbine, the steam still retains substantial waste heat, which is removed by the heat exchange system 10, and the condensate is returned via the return line 36.

2 is a front view of the air-cooled condenser module 12 shown in Fig. 1 according to an embodiment of the present invention. As shown in FIG. 2, the substructure 20 occupies a relatively small area resulting in a large open space below the air-cooled condenser module 12.

3 is a cross-sectional view of the air-cooled condenser module 12 shown in FIG. 1 according to an embodiment of the present invention. As shown in FIG. 3, the supply line 22 is shown to be reduced in size as it progresses along the air-cooled condenser module 12. Generally, as the riser 24 channel flows from the supply line 22 to the upper manifold 28, the size of the supply line 22 is accordingly reduced.

4 is a perspective view of the air-cooled condenser module 12 shown in Fig. 1 according to an embodiment of the present invention. As shown in Figure 4, in addition to the fan 32 and the bell housing, the header 26, the top manifold 28, and the bundle 30 have been removed to make the bottom structure 20 transparent. In Figures 5-16 below, the inventive construction sequence for the air-cooled condenser module 12 is illustrated in accordance with the present invention.

In Fig. 5, a reinforced bay 50 is disposed in the construction site for the air-cooled condenser module 12 shown in Fig. The reinforced bay 50 is configured to support one of the air-cooled condenser modules 12 on the four legs 52. In a general configuration, the base is disposed on the ground below each leg 52.

Figure 6 is a perspective view of a duct 60, a riser 24, and a middle truss 62 for the air-cooled condenser module 12 shown in Figure 1 according to an embodiment of the present invention. 6, the riser 24 and the duct 60 are pre-assembled at the manufacturing plant, and the container can be transported to the construction site. Similarly, the middle truss 62 may be pre-assembled at the manufacturing plant and the container may be transported to the construction site. These and other pre-assemblies shown here facilitate the reduction of labor costs and lead to improvements in the quality of construction. For example, in a production plant, the welder may be protected from rain and other factors that will reduce the quality of the weld. However, in other embodiments, the riser 24 may be attached to the duct 60 after it is placed on the lower structure 20.

7 is a perspective view of an assembled duct 60, a riser 24, and a middle truss 62 for the air-cooled condenser module 12 shown in FIG. 1 according to an embodiment of the present invention. In an embodiment, the assembly may be performed on a construction site or on a ground at a manufacturing plant. In Figure 8, it is shown that the assembled duct 60, the riser 24, and the middle truss 62 are disposed on the reinforced bay 50 for the air-cooled condenser module 12 shown in Figure 1. [ For example, the assembled duct 60, the riser 24, and the middle truss 62 can be placed on the raised and reinforced bay 50 by a crane.

9, a plurality of transverse structures 90 are shown having an assembled duct 60, a riser 24, and a middle (not shown) disposed on a bay 50 reinforced for the air-cooled condenser module 12 shown in FIG. Is disposed on the truss (62). For example, the transverse structure 90 can be welded or bolted to the reinforced bay 50 after it has been raised by the crane.

10 is a perspective view of a transverse truss 100 for the air-cooled condenser module 12 shown in FIG. 1 according to an embodiment of the present invention. The transverse truss 100 may be pre-assembled at the manufacturing plant and the container may be transported to the construction site. 11, a lateral truss 100 is shown having an assembled duct 60, a riser 24, and a middle truss (not shown) disposed on a bay 50 reinforced for the air-cooled condenser module 12 shown in FIG. 62 on the transverse structure 90. For example, the transverse truss 100 may be welded or bolted to the transverse structure 90 after being lifted by the crane.

12 is a perspective view of a longitudinal truss 120 for the air-cooled condenser module 12 shown in FIG. 1 according to an embodiment of the present invention. The longitudinal truss 120 may be pre-assembled at the manufacturing plant and the container may be transported to the construction site. In Figure 13, longitudinal truss 120 is shown attached to transverse truss 100. For example, the longitudinal truss 120 may be welded or bolted to the lateral truss 100 after being lifted by the crane.

14 is a perspective view of a bridge 140 for the air-cooled condenser module shown in Fig. 1 according to an embodiment of the present invention. In Figure 15, the bridge 140 is connected to the transverse truss 100 on the reinforced bay 50. For example, the bridge 140 may be welded or bolted to the transverse truss 100 after being lifted by the crane.

16 is a perspective view of a partial arrangement of the header 26 disposed on the riser 24. As shown in Fig. The header 26 is shown connected to an upper manifold 28 which supplies steam to the bundle 30. [ Delta 160 is an assembled set of top manifold 28 and bundle 30.

Referring to Fig. 17, a modular air-cooled condenser module 12 is shown on a simplified substructure. The air-cooled condenser module 12 includes a plenum 170 having an airflow generator or fan disposed generally within a fan shroud or injection bell 34 and the lower structure 20 is shown in simplified form for clarity . The air-cooled condenser module 12 further includes a plurality of A-shaped geometric deltas, each designated 160. Each delta 160 includes two tube bundle assemblies 30 having tubes with a series of pins to perform heat transfer. The delta 160 will be described in detail below.

18 and 19, a schematic side view of the air-cooled condenser module 12 is shown. As shown in FIG. 18, the air-cooled condenser employs a riser 24 welded to the main vapor duct 22. The riser 24 is connected to a vapor manifold 28 that operates to maintain a more constant steam flow rate. Such a configuration as described above will be described in detail below as part of the A-type condenser bundle 30 transported as a single unit from the factory. The condenser bundle 30 is preferably welded to the riser 24 via the transitional piece 26 to mount the geometry of the vapor manifold.

Referring to Figure 20, a delta 160 is shown. As shown, each delta 160 is comprised of two separate heat exchange bundle assemblies 30, each having a tube with a series of fins. The individual tubes are approximately 2 meters long and the bundle length is approximately 12 meters. As shown, each bundle assembly 30 is positioned at an angle to each other to form an A-shaped configuration of the delta 160. While bundle assemblies 30 can be positioned at desired angles, they are preferably positioned at approximately 30 degrees (30 degrees) at approximately 20 degrees (20 degrees) from vertical and approximately 70 degrees at approximately 60 degrees (60 degrees) (70 DEG). More specifically, bundle assembly 30 is positioned at 26 degrees (26 degrees) from vertical and 64 degrees (64 degrees) from horizontal.

Each of the bundle assemblies 30 is assembled prior to transport and each includes a transitional piece 202 of the head at the riser, a vapor manifold 204, a tube 206 having a fin, and a vapor condensate header 200 . 17, due to the modular design and orientation of the bundle assembly 30, the air-cooled condenser design 10 has approximately five times more tubes than the conventional design. Furthermore, the embodiment of the present invention employs a condenser tube that is much shorter than the length of the long tube, instead of using only five tubes. As a result of the design and orientation described above, the vapor velocity running through the tube bundle 30 is reduced due to the increased number of tubes combined with the reduced tube length, and thus the increased pressure drop in the delta 160 is reduced , So that the air-cooled condenser 10 becomes more efficient.

Generally, turbine backpressure, such as air-cooled condensers, is limited by the maximum steam velocity in the tube (to limit erosion), where the steam velocity increases with decreasing backpressure (due to density of vapor). Therefore, due to the addition of the tube according to the invention, the steam is still maintained at the maximum permissible vapor rate or low back pressure. Another limitation addressed by current delta designs is that the pressure at the exit of the secondary bundle can not be less than the vacuum group capability. This pressure is usually due to the turbine back pressure minus the pressure drop in the ducting and minus the pressure drop in the turbine. Thus, due to the reduced pressure drop in the turbine, the allowable turbine back pressure is lower than the delta 160 design.

Moreover, the bundle design described above also reduces the pressure drop in the individual delta 160. For example, the heat exchange that occurs via the delta 160 depends on the heat exchange coefficient, i.e., the average temperature difference between air and vapor and the exchange surface. Due to the reduced pressure drop as described above, the average pressure in the exchanger (the average over the inlet pressure and the outlet pressure) is higher than the design of the current condenser configuration 12. In other words, since the steam is saturated, the average steam temperature is also higher for the same heat exchange surface, resulting in increased heat exchange.

Referring to Fig. 21, a transport container designated generally at 210 is shown. As the name suggests, the transfer container 210 is used to transfer the bundle 30 from the factory to the shop floor. As shown, the condenser bundles 30 are factory fabricated and assembled with steam manifold 204 and vapor condensate header 200, respectively. Although five (5) bundles are shown as being located in the transport container, a number of individual bundles per container may be transported as needed or desired.

Alternatively, the above-described embodiment of the present invention employs a tube bundle having a vapor manifold 204 and a vapor condensate header 200 that are fabricated and assembled prior to transport, May not be included. More specifically, in such an embodiment, the tube bundle may be transported without a vapor manifold 28 attached thereto. In this embodiment, the tube bundles 30 can be assembled in situ to form an A-shaped configuration as described above. However, instead of employing two steam manifolds, this alternative embodiment may employ a single steam manifold, where a single steam manifold extends along the "apex" of the A configuration.

Referring to Fig. 22, the assembling step of the air-cooled condenser tower 12 is schematically shown. As discussed above, the individual tube bundles 30 are assembled prior to being transported to the site as referenced by reference numeral 212. Each discrete bundle assembly 30 includes a tube 206 having a plurality of fins along a vapor manifold 204 and a vapor condensate header 200. The bundle assembly 30 is pre-fabricated in the factory prior to placing the individual bundle assembly 30 in the shipping container 210, as indicated by reference numeral 42, as described above in connection with previous figures of the detailed description. The transport container 210 is then transported to an erection field site.

Next, a delta, generally designated 160, is assembled in the field as identified by reference numerals 216 and 218. Although the bundles can be positioned at any desired angle, as described above, they are preferably positioned at an angle y of about 20 degrees (20 degrees) to about 30 degrees (30 degrees) 0.0 > 70 < / RTI > at an angle of 60 deg. More specifically, the bundle is positioned at 26 degrees (26 degrees) from vertical and 64 degrees (64 degrees) from horizontal. As indicated by reference numeral 220, a single A-shaped delta, designated 160, forms an "A" configuration formed by two bundle assemblies 30. Bundle assembly 30 itself supports each other in this configuration.

It is shown that employing five deltas 160, with reference to air-cooled condenser module 12, as indicated at 220. As discussed above, air-cooled condensers are improved for current air-cooled condenser types, which have a high "pre-manufacturing" level, which reduces installation costs and reduces installation time. Moreover, the design described above reduces the pressure drop, thus providing a more efficient heat exchange apparatus.

Tables 1 and 2 below show the number of parts used for 32 module multi-delta and 30 module A-frame ACC designed for the same duty. There is a very noticeable reduction in parts, which leads to substantially less build manpower and build time.

Table 1: Multi-delta Type 1 Count 2 Type 4 Count 2 Substructure column 12 Substructure column 6 Bracing 36 Bracing 6 Horizontal beam 8 Horizontal beam 6 Other 26 Other 13 Plenum Middle Truss One Plenum Middle Truss One Transverse truss 4 Transverse truss 2 Longitudinal truss 2 Longitudinal truss 0.5 Octagonal structure 16 Octagonal structure 16 Fan deck plate 24 Fan deck plate 24 bridge 4 bridge 4 Horizontal wind bracing 4 Horizontal wind bracing 2 Longitudinal wind wall Horizontal girder 2 Longitudinal wind wall Horizontal girder 0 Lateral wind wall Horizontal girder 0 Lateral wind wall Horizontal girder 0 Sum of elements 278 Sum of elements 161 Type 2 Count 2 Type 5 Count 4 Substructure column 12 Substructure column 6 Bracing 36 Bracing 6 Horizontal beam 8 Horizontal beam 6 Other 26 Other 13 Plenum Middle Truss One Plenum Middle Truss One Transverse truss 4 Transverse truss 2 Longitudinal truss One Longitudinal truss 2 Octagonal structure 16 Octagonal structure 16 Fan deck plate 24 Fan deck plate 24 bridge 4 bridge 4 Horizontal wind bracing 4 Horizontal wind bracing 2 Longitudinal wind wall Horizontal girder 0 Longitudinal wind wall Horizontal girder 2 Lateral wind wall Horizontal girder 0 Lateral wind wall Sheeting support 1.5 Sum of elements 272 Sum of elements 342 Type 3 Count 2 Type 6 Count 4 Substructure column 6 Substructure column 6 Bracing 6 Bracing 6 Horizontal beam 6 Horizontal beam 6 Other 13 Other 13 Plenum Middle Truss One Plenum Middle Truss One Transverse truss 2 Transverse truss 2 Longitudinal truss 2 Longitudinal truss 0.5 Octagonal structure 16 Octagonal structure 16 Fan deck plate 24 Fan deck plate 24 bridge 4 bridge 4 Horizontal wind bracing 2 Horizontal wind bracing 2 Longitudinal wind wall Horizontal girder 2 Longitudinal wind wall Horizontal girder 0 Lateral wind wall Horizontal girder 0 Lateral wind wall Horizontal girder 1.5 Sum of elements 168 Sum of elements 328 Bundle floor girder 256 External lateral walkway (with grating) 320 Total assembly for 32 module multi-delta 2125

Table 2: ACC Type 1 Count One Type 4 Count 2 Substructure column 8 Substructure column 4 Bracing 24 Bracing 10 Horizontal beam 4 Horizontal beam 3 Longitudinal wind wall support 0 Longitudinal wind wall support 4 Fan deck Main beam 4 Fan deck Main beam 3 Octagonal structure 16 Octagonal structure 16 bridge Main truss One bridge Main truss One Bridge foot 4 Bridge foot 4 Handrail 4 Handrail 4 grid 10 grid 10 A-frame column 6 A-frame column 6 Top A 3 Top A 3 Bracing 8 Bracing 8 Top girder 2 Top girder 2 Mini a-frame 4 Mini a-frame 4 Fixed in bridge center 4 Fixed in bridge center 4 Beam lifted 4 Beam lifted 4 Lateral a-frame 3 Lateral a-frame 3 Longitudinal middle a-frame 4 Longitudinal middle a-frame 4 Fixed to end of bridge 4 Fixed to end of bridge 4 Internal girder and door frame 16 Internal girder and door frame 16 Angle for intermediate valvelessing 4 Angle for intermediate valvelessing 4 Longitudinal wind wall column 0 Longitudinal wind wall column 7 Horizontal girder 0 Horizontal girder 30 Bracing 0 Bracing 6 Connect to SDM 0 Connect to SDM 7 Lateral walkway 0 Lateral walkway One Diamond plate 0 Diamond plate 10 Lateral wind wall column 0 Lateral wind wall column 0 Girder 0 Girder 0 Cleaning System Lower rail 4 Cleaning System Lower rail 4 Upper rail 4 Upper rail 4 grid 10 grid 0 Sum of elements 155 Sum of elements 380 Type 2 Count 2 Type 5 Count 4 Substructure column 4 Substructure column 2 Bracing 10 Bracing 4 Horizontal beam 3 Horizontal beam 2 Longitudinal wind wall support 0 Longitudinal wind wall support 2 Fan deck Main beam 3 Fan deck Main beam 2 Octagonal structure 16 Octagonal structure 16 bridge Main truss One bridge Main truss One Bridge foot 4 Bridge foot 4 Handrail 4 Handrail 4 grid 10 grid 10 A-frame column 4 A-frame column 4 Top A 2 Top A 2 Bracing 0 Bracing 0 Top girder 2 Top girder 2 Mini a-frame 2 Mini a-frame 2 Fixed in bridge center 4 Fixed in bridge center 4 Beam lifted 4 Beam lifted 4 Lateral a-frame 2 Lateral a-frame 2 Longitudinal middle a-frame 4 Longitudinal middle a-frame 4 Fixed to end of bridge 2 Fixed to end of bridge 2 Internal girder and door frame 8 Internal girder and door frame 8 Angle for intermediate valvelessing 4 Angle for intermediate valvelessing 4 Longitudinal wind wall column 0 Longitudinal wind wall column 6 Horizontal girder 0 Horizontal girder 30 Bracing 0 Bracing 6 Connect to SDM 0 Connect to SDM 6 Longitudinal walkway 0 Longitudinal walkway One Diamond plate 0 Diamond plate 10 Lateral wind wall column 0 Lateral wind wall column 0 Girder 0 Girder 0 Cleaning System Lower rail 4 Cleaning System Lower rail 4 Upper rail 4 Upper rail 4 grid 6 grid 0 Sum of elements 214 Sum of elements 608 Type 3 Count 2 Type 6 Count 4 Substructure column 4 Substructure column 2 Bracing 10 Bracing 4 Horizontal beam 3 Horizontal beam 2 Longitudinal wind wall support 0 Longitudinal wind wall support 2 Fan deck Main beam 3 Fan deck Main beam 2 Octagonal structure 16 Octagonal structure 16 bridge Main truss One bridge Main truss One Bridge foot 4 Bridge foot 4 Handrail 4 Handrail 4 grid 10 grid 10 A-frame column 4 A-frame column 4 Top A 2 Top A 2 Bracing 0 Bracing 0 Top girder 2 Top girder 2 Mini a-frame 2 Mini a-frame 2 Fixed in bridge center 4 Fixed in bridge center 4 Beam lifted 4 Beam lifted 4 Lateral a-frame 2 Lateral a-frame 2 Longitudinal middle a-frame 4 Longitudinal middle a-frame 4 Fixed to end of bridge 2 Fixed to end of bridge 2 Internal girder and door frame 3 Internal girder and door frame 3 Angle for intermediate valvelessing 4 Angle for intermediate valvelessing 4 Longitudinal wind wall column 0 Longitudinal wind wall column 6 Horizontal girder 0 Horizontal girder 30 Bracing 0 Bracing 14 Connect to SDM 0 Connect to SDM 5 Longitudinal walkway 0 Longitudinal walkway One Diamond plate 0 Diamond plate 10 Lateral wind wall column 4 Lateral wind wall column 3 Girder 20 Girder 17.5 Cleaning System Lower rail 4 Cleaning System Lower rail 4 Upper rail 4 Upper rail 4 grid 6 grid 0 Sum of elements 252 Sum of elements 698 Upper platform 21 Cleaning leather 6 External lateral walkway (with grating) 240 30 modules ACC  (2 units of 15 modules) 5148

As shown in Table 1 and Table 2, the multi-delta ACC of the embodiment here embraces less than half of the components of the comparable conventional A-frame ACC (2125 parts versus 5148 parts). This decrease in the number of parts reduces correspondingly the cost of manpower and installation time.

Many features and advantages of the present invention will become apparent from the detailed description and, therefore, it is intended to cover all such features and advantages of the present invention that fall within the spirit and scope of the invention as defined by the appended claims. Furthermore, it is not intended that the present invention be construed as limited to the exact construction and operation shown and described, since various modifications and variations will readily occur to those skilled in the art, for example, a forced draft air-cooled condenser is shown, Ventilation designs may be employed, and thus all suitable modifications and equivalents are possible within the scope of the present invention.

Claims (20)

CLAIMS What is claimed is: 1. A method of assembling a substructure for a modular air-cooled condenser extending along a vertical axis away from horizontal, the method comprising:
Providing a base for the reinforced bay;
Positioning the reinforced bay on the base;
Assembling the pre-dried middle truss with a pre-dried duct and riser;
Positioning the assembled middle truss and duct on the reinforced bay;
Attaching a plurality of pre-dried transverse structures to the reinforced bay;
Attaching a plurality of pre-dried transverse trusses to an attached transverse structure;
Attaching a plurality of pre-dried longitudinal trusses to the ends of the attached lateral trusses; And
Attaching a plurality of pre-dried bridges between the attached lateral trusses
Wherein the lower structure is formed of a metal. The method of claim 1, further comprising attaching a header to each riser, respectively. 3. The method of claim 2, further comprising attaching an upper manifold to each header. 4. The method of claim 3, further comprising attaching an upper manifold to each header. 5. The method of claim 4, further comprising attaching the bundle to each top manifold. The method of claim 1, further comprising fluidly connecting a return line to each bundle. 7. The method of claim 6, further comprising fluidly connecting the return line to a power plant. The method of claim 1, further comprising fluidly connecting the main steam line to the duct. 9. The method of claim 8, further comprising fluidly connecting the main steam line to a power plant. The method of claim 1, further comprising attaching a bell housing and a fan to the lower structure. A modular substructure for an air-cooled condenser extending along a vertical axis away from horizontal:
A reinforced bay disposed on the foundation;
An assembled pre-dried middle truss having pre-dried ducts and risers disposed on the reinforced bay;
A plurality of pre-dried transverse structures attached to the reinforced bay;
A plurality of pre-dried transverse trusses attached to the attached transverse structure;
A plurality of pre-dried longitudinal trusses attached to ends of the transverse trusses; And
A plurality of pre-dried bridges attached between the transverse trusses
The modular structure. 12. The modular substructure of claim 11, further comprising a header attached to each riser. 13. The modular substructure of claim 12, further comprising an upper manifold attached to each header. 14. The modular substructure of claim 13, further comprising four top manifolds attached to each header. 15. The modular substructure of claim 14, further comprising a bundle attached to each top manifold. 12. The modular substructure of claim 11, further comprising a return line fluidly connected to each bundle. 17. The modular substructure of claim 16, further comprising a return line fluidly connected to the power plant. 12. The modular substructure of claim 11, further comprising a main steam line fluidly connected to the duct. 19. The modular substructure of claim 18, further comprising a main steam line fluidly connected to the power plant. 12. The modular substructure of claim 11, further comprising a bell housing and a fan attached to the substructure.

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