Floating Base Flow Control for Wave Energy Recovery

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Solution Overview

Problem

Existing wave energy recovery systems face challenges in controlling water flow across varying sea conditions, require extensive preparation of the sea bottom for installation, and are limited to shallow waters, leading to reduced capacity and increased costs.

Innovation Solution

A flow control arrangement that uses a lightweight or floating base supported by piles or conical piles, allowing for adjustable water flow direction and installation in deeper waters without prepping the sea bottom, with hydraulic cylinders and flexible covers to optimize energy capture in different conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a heavy base is used for the wave energy recovery apparatus, then the apparatus can be stabilized on the seabed, but the installation requires extensive preparation of the sea bottom and is limited to shallow waters

Engineering Contradiction:
Improvestability of apparatusVSAvoidease of installation
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent replaces the heavy base with a floating base that uses buoyancy as a counterweight to anchoring forces. The floating base is held in position by mooring lines or anchors rather than requiring a heavy mass to resist movement, thereby eliminating the need for extensive seabed preparation while maintaining stability in the water column.

Inventive Principle:
Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The invention transitions from a seabed-mounted system (two-dimensional constraint on the seabed surface) to a water-column-mounted system (three-dimensional positioning in the water). This dimensional shift allows the apparatus to be installed in deeper waters without requiring the heavy base and extensive seabed preparation that characterizes bottom-mounted systems.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If a heavy base is used for the wave energy recovery apparatus, then the apparatus can be stabilized on the seabed, but the installation time and costs increase due to sea bottom preparation

Engineering Contradiction:
Improvestability of apparatusVSAvoidinstallation time
Core Design Contradiction:
Stability of the object's compositionVSLoss of time

Solution Approach 1:

By using buoyancy as a counterweight rather than a heavy base, the system eliminates the time-consuming process of seabed preparation and heavy base installation. The floating base can be deployed more quickly using standard marine installation techniques for floating structures.

Inventive Principle:
Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The invention extracts the heavy base and extensive seabed preparation requirements from the system. The stability function is achieved through a different mechanism (floating base with mooring/anchoring) that does not require the heavy base, thereby removing the time loss associated with seabed preparation.

Inventive Principle:
Principle #2Taking out (Extraction)

3Ease of manufacture

If a fixed base is used for the wave energy recovery apparatus, then the apparatus can be installed in shallow waters, but the adaptability to different sea conditions and installation locations is limited

Engineering Contradiction:
Improveease of installationVSAvoidadaptability to sea conditions
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The floating base provides dynamic adaptability to varying sea conditions. Unlike a fixed heavy base that is optimized for specific shallow water conditions, the floating base can respond to changing wave conditions, water depths, and currents. The mooring system allows the apparatus to be installed in a wide range of water depths and locations, greatly enhancing versatility.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The floating base design serves multiple functions: it provides stability through buoyancy, allows installation in various water depths, and can be moored in different configurations to suit various sea conditions. This universal design replaces the location-specific heavy base with a multi-functional floating platform that can be deployed across diverse marine environments.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Productivity

If the reciprocating panel captures all wave energy, then energy capture capacity is maximized, but the apparatus cannot handle stormy weather conditions

Engineering Contradiction:
Improveenergy capture capacityVSAvoidreliability in stormy weather
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The floating base with its mooring system provides dynamic response to extreme weather conditions. During storms, the floating apparatus can move with the waves rather than being rigidly constrained to the seabed, reducing structural loads. The energy capture system can be dynamically adjusted or protected while maintaining operational reliability in stormy conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The floating base design inherently provides cushioning against extreme weather by allowing the structure to move with waves rather than being fixed to the seabed. This prior cushioning effect protects the energy capture mechanisms from excessive loads during storms, maintaining reliability while preserving energy capture capacity in normal conditions.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient capture of wave energy in all sea conditions, reduces installation costs and time, and expands installation locations to deeper waters, improving the versatility and reliability of wave energy conversion.

Implementation Method 1

a lightweight or floating base supported by piles or conical piles

Methodology Applied
Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

with hydraulic cylinders and flexible covers to optimize energy capture in different conditions

Methodology Applied
Scientific EffectHydraulic pressure: Hydraulic Press

Data Source

PatentEP3362677B1Flow control arrangement in a wave energy recovery apparatus
Publication Date: 2020.10.14 AW ENERGY
  • EP3362677B1 patent drawingFigure 1
  • EP3362677B1 patent drawingFigure 2
  • EP3362677B1 patent drawingFigure 3~4

AI summary

(57) Abstract This invention relates to a flow control arrangement in a wave energy recovery apparatus comprising at least a first base (1), on which a reciprocating panel (2) is in- stalled, a pivot shaft for the reciprocating panel (2), a control system, and a power-take-off (PTO) unit (3) to convert kinetic energy of waves or tidal currents to an- other type of energy. The first base (1) is arranged to divide the water flow caused by waves at least into two separate flows, the first flow (9) towards the panel (2) and the second flow (10) to run under the first base (1), and that the arrangement comprises a gap (1a) under the first base (1) through which the second flow (10) is arranged to be guided.