{
    "title": "Vortex Rotation Cooling (Pulsed Rotation Cooling)",
    "inventor_name": "Grigorian VARTAN",
    "publication_year": 2013,
    "device_name": "V-Tex Pulsed Rotation Cooling System",
    "goal": "Rapidly chill beverages on demand while preserving carbonation and reducing energy consumption.",
    "problem_addressed": "Slow cooling times, high energy use of conventional refrigeration, and excessive foaming (slushing) when carbonated drinks are agitated.",
    "concept_summary": "A cooling apparatus rotates a beverage container around twin axes in a cooling liquid, creating a Rankine vortex. Pulsed (stop-start) rotation collapses and reforms the vortex, enhancing forced convection and mixing without introducing nucleation sites, allowing the drink to reach low temperatures in seconds with significantly lower energy use.",
    "detailed_description": "The system consists of a cavity that holds a can or bottle, a motor-driven turntable that can spin the container at 90-720 rpm (up to 12 Hz), and a supply of chilled cooling liquid (water or salt-water at -10  deg C to -16  deg C). The rotation is pulsed: a period of rotation is followed by a pause, causing the vortex to collapse and natural convection to mix the liquid. Twin-axis rotation prevents axial movement and maintains the container's orientation. Tests showed cooling from room temperature to ~=4  deg C in ~45 s, with >80 % less energy than conventional chillers. Prototypes were built by Regent and Pera Technology and two patents (WO2011012902 and a second related filing) were filed by Enviro-Cool (UK) Limited.",
    "category": "Thermal Systems",
    "principles": [
        "Vortex dynamics (Rankine vortex)",
        "Forced and natural convection",
        "Pulsed rotational mixing",
        "Heat transfer via chilled liquid immersion"
    ],
    "scientific_domains": [
        "Fluid dynamics",
        "Thermodynamics",
        "Heat transfer",
        "Mechanical engineering"
    ],
    "mechanisms_of_action": [
        "Rotationally induces a forced vortex inside the beverage",
        "Pulsed stop-start sequence collapses the vortex, promoting mixing",
        "Immersion in chilled liquid extracts heat by convection",
        "Twin-axis rotation maintains container stability and prevents axial displacement"
    ],
    "materials": [
        "Water",
        "Salt-water solution",
        "Aluminum can / glass bottle",
        "Metal cavity (steel/aluminum)",
        "Diaphragm pump"
    ],
    "energy_sources": [
        "Electricity (motor and pump)",
        "Pre-chilled cooling liquid (refrigeration system)"
    ],
    "inputs": [
        "Hot beverage (room temperature)",
        "Chilled cooling liquid",
        "Electric power"
    ],
    "outputs": [
        "Cooled beverage (~=4  deg C)",
        "Reduced energy consumption"
    ],
    "claimed_performance": "Cools drinks from ambient to 4  deg C in ~45 seconds; uses >80 % less energy than standard drink chillers; rotation speeds >=90 rpm (up to 720 rpm); cooling liquid temperature <=-10  deg C (preferably <=-16  deg C).",
    "experimental_evidence": "Tests performed on prototype units showed cooling rates sufficient to reach 4  deg C in 45 s and demonstrated that rotating at 360 rpm for 5 min does not cause excessive fizzing. The cooling liquid flow of 5 L/min and vortex collapse cycles (5-15 s rotation, 10-30 s pause) were reported to improve cooling efficiency.",
    "replication_status": "Three prototypes built by Regent and Pera Technology; patents filed; no commercial scale production reported.",
    "keywords": [
        "vortex cooling",
        "pulsed rotation",
        "Rankine vortex",
        "beverage cooling",
        "rapid cooling",
        "energy-efficient refrigeration"
    ],
    "related_technologies": [
        "Cooper cooler",
        "Peltier coolers",
        "Gel-based phase-change jackets"
    ],
    "controversy_level": "low",
    "confidence_score": 0.85,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.6,
    "risk_score": 0.1,
    "trl_estimate": 5,
    "source_urls": [
        "http://www.telegraph.co.uk/science/science-news/10404692/Reverse-microwave-can-chill-wine-bottles-and-fizzy-drink-cans-in-45-seconds.html",
        "http://www.youtube.com/watch?v=NSVChmfcv2k",
        "http://www.enviro-cool.co.uk/",
        "https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2011012902"
    ],
    "organizations": [
        "Enviro-Cool (UK) Limited",
        "Regent and Pera Technology"
    ],
    "applications": [
        "Vending machines with on-demand cooling",
        "Retail beverage chillers",
        "Event catering rapid-serve stations"
    ],
    "limitations": [
        "Requires chilled cooling liquid supply and refrigeration for the coolant",
        "Mechanical wear of rotating components",
        "Limited to containers that can be securely rotated",
        "Energy savings depend on efficiency of the cooling-liquid refrigeration system"
    ],
    "open_questions": [
        "How does performance scale to larger volumes (e.g., 2-L bottles)?",
        "What is the total lifecycle energy consumption compared to conventional refrigeration?",
        "Can the system be adapted for non-carbonated or viscous liquids?",
        "Long-term reliability of the rotating mechanism in commercial settings"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The new system can cool drinks, including wine bottles and fizzy drink cans, from room temperature to four degrees in a matter of seconds.",
        "Tests showed that cooling rates could be improved by collapsing the vortex and then recreating it; this was achieved by a stop start rotational sequence.",
        "A can may be rotated at 360 rpm for over 5 minutes without fizzing.",
        "The cooling liquid is supplied to the cavity at a temperature of -10  deg C or less, more preferably -14  deg C or less, even more preferably -16  deg C or less."
    ]
}