Modified CO2 cycle for long endurance unmanned underwater vehicles and resultant chirp acoustic capability

    公开(公告)号:US10946944B2

    公开(公告)日:2021-03-16

    申请号:US16384012

    申请日:2019-04-15

    Abstract: A carbon dioxide cycle power generation system includes a first carbon dioxide storage configured to store a first portion of carbon dioxide and a second carbon dioxide storage configured to store a second portion of the carbon dioxide. The carbon dioxide cycle power generation system also includes a generator configured to generate electrical power based on a flow of at least part of the carbon dioxide between the first and second carbon dioxide storages. The carbon dioxide cycle power generation system is configured to cycle between different underwater depths in order to employ water pressure and/or water temperature in creating the flow of the at least part of the carbon dioxide through the generator. The second carbon dioxide storage includes an annular region surrounding a central region, where the annular region has a variable internal volume configured to receive at least part of the second portion of the carbon dioxide.

    FLIGHT VEHICLE
    3.
    发明申请
    FLIGHT VEHICLE 审中-公开

    公开(公告)号:US20190127060A1

    公开(公告)日:2019-05-02

    申请号:US15794169

    申请日:2017-10-26

    Abstract: Method and apparatus for a flight vehicle including a wing having a high aspect ratio and first and second rotors having a high aspect ratio, with a ratio of the rotor diameter to wing length ratio is equal to or greater than about 0.25. In embodiments, the flight vehicle can include a first and second motor, each less than about one thousand HP, to drive a respective rotor and a second motor. The flight vehicle can include a cruise mode and a VTOL mode.

    Systems and methods for power generation based on surface air-to-water thermal differences

    公开(公告)号:US10472033B2

    公开(公告)日:2019-11-12

    申请号:US15787948

    申请日:2017-10-19

    Abstract: A system includes a vehicle having a body and a power generation system. The power generation system includes first and second tanks each configured to receive and store a refrigerant under pressure. The power generation system also includes at least one generator configured to generate electrical power based on a flow of the refrigerant between the tanks. The first tank is configured to be cooled by one of ambient air and water to a lower temperature, and the second tank is configured to be warmed by another of the ambient air and the water to a higher temperature. The first tank or associated heat exchanger can be positioned such that the first tank is above the water's surface when a portion of the body breaches the surface. The second tank or associated heat exchanger can be positioned such that the second tank is below the water's surface when a portion of the body breaches the surface.

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