WO2022180463A1 - Structure flottante polyvalente : énergie solaire et store - Google Patents

Structure flottante polyvalente : énergie solaire et store Download PDF

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Publication number
WO2022180463A1
WO2022180463A1 PCT/IB2022/050840 IB2022050840W WO2022180463A1 WO 2022180463 A1 WO2022180463 A1 WO 2022180463A1 IB 2022050840 W IB2022050840 W IB 2022050840W WO 2022180463 A1 WO2022180463 A1 WO 2022180463A1
Authority
WO
WIPO (PCT)
Prior art keywords
floating
solar photovoltaic
photovoltaic system
underwater
anchor
Prior art date
Application number
PCT/IB2022/050840
Other languages
English (en)
Inventor
Prakash C. Ghosh
Sanmit Mukund MORE
Anand Iyer
Arvind MANIMURUGAN
Original Assignee
Indian Institute Of Technology Bombay
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Indian Institute Of Technology Bombay filed Critical Indian Institute Of Technology Bombay
Publication of WO2022180463A1 publication Critical patent/WO2022180463A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/34—Pontoons
    • B63B35/38—Rigidly-interconnected pontoons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/70—Waterborne solar heat collector modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/4453—Floating structures carrying electric power plants for converting solar energy into electric energy

Definitions

  • the present invention relates to the technical field of photovoltaic power generation devices, in particular to a floating photovoltaic power generation device based on underwater floating sub-anchors enabling boat/ ship assisted maintenance.
  • Floating photovoltaic (PV) solar power systems are known, although not extensively used at present. Such systems are typically deployed on calm water, i.e. on lakes, hydroelectric power dams, water reservoirs, rivers, or the like. Some of the challenges associated with floating solar power systems include exposure to loads from waves and currents, challenging and labour-intensive deployment of the plant (or components thereof), and problems associated with access for system maintenance and cleaning (e.g. salt or solid particles accumulating on plant surfaces). Currently available floating solar power systems are also limited by their relatively high cost.
  • Examples of prior art which may be useful for understanding the background include: US 2012/0242275 Al, which describes a large-scale ocean mobile solar power generation system; US 2015/0162866 Al, which describes a supporting device for a solar panel; US 2014/0224165 Al, which describes a device for supporting a photovoltaic panel; and KR 1011013316 B and KR 101612832 B, which describe solar cells arranged on floating devices.
  • the floating structure of floating photovoltaic power generation devices can be mainly classified into three forms: frame platform type, floating body platform type and floating body-support type.
  • the frame platform type floating structure fixes the floating body below the frame platform, thereby forming an integral floating platform, and a pedestrian passage for maintaining the power generating device and a bracket for mounting the photovoltaic module are arranged above the platform, and then the platforms are connected to each other to form an integrated body.
  • Photovoltaic power generation unit The overall structure is stable and reliable, and the maintenance passage provided on the platform is convenient and stable to walk.
  • the biggest feature is that the floating body only provides buoyancy without having other functions.
  • the bracket and the floating body are both manufactured by conventional methods, the design is relatively Simple, but the structure is huge, and the hoisting construction is more difficult.
  • the floating body of the floating platform floating structure not only provides the buoyancy of the whole platform, but also serves as a connecting bracket and serves as an access passage.
  • the floating body is erected on the surface of the water to form a water-construction traffic road, and then a photovoltaic bracket is erected on the floating body.
  • the isolated floating bodies are connected into pieces, the floating body will float up and down and swing left and right.
  • the bracket and the floating body are made of traditional materials, so the design is relatively simple, no need for large lifting, and the construction is relatively simple.
  • the floating body- support integrated structure (referred to as integrated type) is that the floating body simultaneously provides buoyancy and fixes the photovoltaic component, and the whole photovoltaic power generation device is formed by connecting the bracket type floating body and the maintenance road type floating body, since the maintenance channel is an independent floating block, and the volume is limited.
  • integrated type the floating body-support integrated structure
  • the amplitude of up and down floating is large, and it is extremely inconvenient to walk and carry materials during maintenance.
  • the floating photovoltaic power generation device needs to be equipped with a maintenance channel to realize daily maintenance and installation of the photovoltaic power generation device.
  • Offshore floating structure for generating solar photovoltaic energy is disclosed here.
  • Solar panels are mounted on a semi- submersible frame, the structure is designed for the offshore environment and is based on marine infrastructures.
  • the frame is anchored to the floor using mooring cables.
  • the member on which the solar panel is mounted is lifted off the water surface to protect it from waves.
  • the offshore floating structure for photovoltaic power generation characterized in that the lifting and lowering fluctuation is reduced by the hydraulic resistance applied to the plate by the dampening system.
  • the design incorporates a buoyancy control unit to ensure stability in high wave conditions.
  • the system mentioned in this patent is not modular, though it may seem to provide higher stability for the harsh marine environments, it fails to prove economic viability in relatively calm inland water bodies.
  • KR101339358 Direct moulded buoyancy body for solar cell installation above the water is disclosed here. Solar cell panels are directly mounted on buoyancy bodies/ blocks, the blocks are then connected with each other using structural members.
  • the buoyancy body is formed in a block shape of plastic or polyurethane material to form an inclined surface on the upper surface to facilitate the condensing of sunlight.
  • the buoyancy bodies are partially submerged.
  • the design proposed in this patent is not modular and the connecting bars are susceptible to failure under wind loads on the solar panels. The high buoyancy of the pillar-like floating buoys will move with waves putting bending loads on the bar connecting them.
  • the floating-on-water photovoltaic system is anchored on floating mooring buoys.
  • the floating mooring buoys are connected to each other through longitudinal bars.
  • the floating-on-water photovoltaic system is made using interconnected floaters on which solar panels are mounted.
  • the weight of the platform on which solar panels are mounted are transferred directly to the mooring buoys. This makes it pertinent to perform calculations and design the mooring buoys according to the weight on the platform to ensure that mooring buoys provide right buoyancy. This constraint makes the system in this patent less modular.
  • a kind of wind and wave resistance floatation type sea photovoltaic power generation platform is disclosed here.
  • Platform to mount the solar panel is made using a steel truss.
  • the truss is supported by a float that is submerged under the water.
  • the underwater float is supported by vertical columns/pillars from the sides to align it and maintain balance.
  • Steel ballast ball filled with lead is mounted to keep the centre of gravity low and ensure high stability in case of harsh weather conditions.
  • Heave plate connects the columns and acts as a structural member. It also provides additional stability.
  • the design proposed in this patent is well-suited for harsh wind and wave marine conditions as it provides immense stability. But this stability comes at a very high cost, such high stability is not required in relatively calm inland water bodies.
  • the design is not modular, expansion of the floating solar plant is not possible and it is costly.
  • One aspect of present invention relates to a floating solar photovoltaic system comprising floating modules made of a closed loop of pipes with internal compartments on which Shade/PV Panel etc. are mounted. Modules are connected with each other using quick release pipe clamps/ropes etc. to form an array with or without boat lanes as maintenance bays. The array is anchored to an underwater floating sub-anchor.
  • FIG 1 illustrates schematic of system over water, boat lanes depicted as disclosed one of the embodiments of present invention.
  • Figure 2 illustrates skeleton of system, underwater floating structure as disclosed one of the embodiments of present invention.
  • Figure 3 illustrates front view of system, front view of boat lanes as disclosed one of the embodiments of present invention.
  • Figure 4 illustrates side view of system, connection between floaters and underwater floating structure as disclosed one of the embodiments of present invention.
  • Figure 5 illustrates top view of system as disclosed one of the embodiments of present invention.
  • Figure 6 illustrates back view of system as disclosed one of the embodiments of present invention.
  • Figure 7 illustrates front view of system as disclosed one of the embodiments of present invention.
  • FIG 8 illustrates Underwater floating structure (sub-anchor) as disclosed one of the embodiments of present invention.
  • Figure 9 illustrates Solar panel mounted on floater as disclosed one of the embodiments of present invention.
  • present design of maintenance lanes saves cost without compromising operational safety
  • present design of floating sub-anchor shifts the centre of mass of floating system below the water surface enhancing stability.
  • the invention of floating sub-anchor significantly reduces the length of anchoring lines and thus the anchoring cost of modular structures.
  • the present invention relates to a floating solar photovoltaic system comprising floating modules made of a closed loop of pipes with internal compartments on which Shade/PV Panel etc. are mounted. Modules are connected with each other using quick release pipe clamps/ropes etc. to form an array with or without boat lanes as maintenance bays. The array is anchored to an underwater floating sub-anchor.
  • the underwater floating sub-anchor may have form of truss supported by buoys or a hollow pipe of a larger diameter.
  • the underwater floating sub anchor is with or without internal foam filling. The sub-anchors are filled with foam to prevent failure in case water breaches the structure.
  • the pipes are made of High Density Polyethylene (HDPE), Polypropylene (PP), Polybutylene, Fibre Reinforced Plastics (FRP), concrete, bamboo or bamboo derived products, metal derived products like metallic foams and the combination thereof.
  • HDPE High Density Polyethylene
  • PP Polypropylene
  • PP Polybutylene
  • FRP Fibre Reinforced Plastics
  • concrete bamboo or bamboo derived products, metal derived products like metallic foams and the combination thereof.
  • the anchor section that is completely submerged is supported by floaters that are floating in the water with a fraction of it above the water surface.
  • the pipes used to make the modules have internal divisions (water/airtight compartments) inspired by bamboo (biomimicry) to ensure the stability of the modules even if they are damaged (breached by water).
  • the hollow pipes may also be filled with foam to further mitigate the risk of seepage.
  • the underwater floating structure is supported by vertical columns which not only provide buoyancy but also provide a stable depth to the underwater structure o If the underwater structure sinks deeper than the designed depth, vertical columns will move down with the underwater structure providing additional buoyancy and thus raising the underwater structure back to the designed depth o Similarly, if the system rises above the designed depth, a greater portion will rise above the water level leading to a decrease in buoyancy and thus the system will sink back to the designed depth o Thus, the column ensures that the system is in stable equilibrium.
  • the floating solar photovoltaic system can be deployed on any inland water reservoir.
  • the primary customer to target would be the Local governments and energy companies to partner with and possibly have a joint venture.
  • the technology is scalable and the greater the economy of scale, lower the price of the project.
  • This system can also be used for other systems like floating shade, aerators etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention porte sur un système photovoltaïque solaire flottant comprenant des modules flottants constitués d'une boucle fermée de tuyaux de polyéthylène haute densité (PEHD) avec des compartiments internes sur lesquels sont montés un store/panneau PV, etc., les modules étant reliés les uns aux autres à l'aide de brides/câbles etc. de tuyau à libération rapide, pour former un réseau avec ou sans voies de bateau comme baies de maintenance et le réseau est ancré à un sous-ancrage flottant sous-marin flottant.
PCT/IB2022/050840 2021-02-24 2022-02-01 Structure flottante polyvalente : énergie solaire et store WO2022180463A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202121007731 2021-02-24
IN202121007731 2021-02-24

Publications (1)

Publication Number Publication Date
WO2022180463A1 true WO2022180463A1 (fr) 2022-09-01

Family

ID=83048694

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/050840 WO2022180463A1 (fr) 2021-02-24 2022-02-01 Structure flottante polyvalente : énergie solaire et store

Country Status (1)

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WO (1) WO2022180463A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2724381A1 (fr) * 2011-06-23 2014-04-30 Staubli, Kurath & Partner AG Structure porteuse flottante pour unité solaire d'une installation solaire et installation solaire correspondante
US20180001975A1 (en) * 2016-06-29 2018-01-04 Elliot Jaramillo Photovoltaic Array System and Method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2724381A1 (fr) * 2011-06-23 2014-04-30 Staubli, Kurath & Partner AG Structure porteuse flottante pour unité solaire d'une installation solaire et installation solaire correspondante
US20180001975A1 (en) * 2016-06-29 2018-01-04 Elliot Jaramillo Photovoltaic Array System and Method

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