{
    "title": "Vigor Wave Energy Converter",
    "inventor_name": "Daniel Ehrnberg",
    "publication_year": 2010,
    "device_name": "Vigor Wave Energy Converter",
    "goal": "Convert wave motion into electrical energy for renewable power generation.",
    "problem_addressed": "Low-efficiency, high-maintenance wave-energy plants that are vulnerable to corrosion and extreme weather.",
    "concept_summary": "A floating flexible hose filled with alternating batches of seawater and air creates pressure differences as waves pass. The pressure variation drives a turbine-generator assembly, producing electricity. The system is simple, uses inexpensive sea water and air, and follows wave motion rather than resisting it.",
    "detailed_description": null,
    "category": "Mechanical Engineering",
    "principles": [
        "Pressure differential conversion",
        "Fluid density difference utilisation",
        "Flow-resistance control"
    ],
    "scientific_domains": [
        "Ocean Engineering",
        "Renewable Energy",
        "Fluid Mechanics"
    ],
    "mechanisms_of_action": [
        "Wave-induced pressure variation in a flexible hose",
        "Alternating water-air batches generate a net pressure rise",
        "Turbine-generator converts pressure/flow into electricity"
    ],
    "materials": [
        "Sea water",
        "Air",
        "Flexible hose (rubber/polymer)",
        "Turbine",
        "Generator"
    ],
    "energy_sources": [
        "Wave motion"
    ],
    "inputs": [
        "Mechanical energy from ocean waves",
        "Sea water",
        "Air"
    ],
    "outputs": [
        "Electrical energy"
    ],
    "claimed_performance": "Potential to produce large amounts of electricity at low cost; high efficiency suggested by simulations.",
    "experimental_evidence": "CFD simulations performed by Vigor Wave Energy AB and Chalmers University; a 40-meter wave-tank test section has been constructed and is being used for further testing.",
    "replication_status": "Test site at Chalmers University progressing; simulations completed.",
    "keywords": [
        "wave energy",
        "flexible hose",
        "pressure differential",
        "renewable power",
        "offshore converter"
    ],
    "related_technologies": [
        "Oscillating water column",
        "Archimedes screw",
        "Wave-energy converters"
    ],
    "controversy_level": "low",
    "confidence_score": 0.85,
    "practicability_score": 0.6,
    "fringe_score": 0.2,
    "evidence_strength": 0.5,
    "risk_score": 0.1,
    "trl_estimate": 4,
    "source_urls": [
        "http://www.vigorwaveenergy.com/",
        "https://patents.google.com/patent/US2010066084A1/en"
    ],
    "organizations": [
        "Vigor Wave Energy AB",
        "Chalmers University of Technology"
    ],
    "applications": [
        "Renewable electricity generation",
        "Offshore power plants"
    ],
    "limitations": [
        "Durability of flexible hose in harsh marine environment",
        "Scalability of the hose-based system",
        "Potential fouling of inflow/outflow passages"
    ],
    "open_questions": [
        "Long-term survivability of the hose under extreme wave conditions",
        "Actual conversion efficiency in real sea states",
        "Optimal control strategy for flow resistance"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The Vigor Wave Energy Converter is based on a floating hose, using water and air as mechanical parts to absorb the wave energy.",
        "The principle uses the height difference (h-2a) of every water batch to create a pressure and flow inside the hose.",
        "Vigor Wave Energy AB and Chalmers University of Technology developed CFD simulations to find out the potential of Vigor.",
        "The first section of the 40-meter long wave tank is already constructed and the work continues."
    ]
}