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    Actuator device utilizing radiative cooling
    7.
    发明授权
    Actuator device utilizing radiative cooling 有权

    公开(公告)号：US11022066B2

    公开(公告)日：2021-06-01

    申请号：US16818279

    申请日：2020-03-13

    Applicant: The University of British Columbia

    Inventor： Alireza Nojeh ,  Lorne A. Whitehead

    IPC: F02G1/04

    Abstract: An actuator device includes a housing that defines an enclosed volume region, the housing comprising a movable surface such that at least a portion of the housing is expandable between an expanded state to a contracted state, and the enclosed volume region having a characteristic dimension that is defined as a cube root of an average of a volume of the enclosed volume region in the expanded state and in the contracted state, a working fluid within the enclosed volumetric region, the working fluid comprising a substantially transparent compressible fluid and electromagnetic (EM) radiation-absorbing solid elements distributed within the compressible fluid, wherein the solid elements have an absorptivity in a particular range of EM radiation wavelengths, a heating system for directing thermal energy into the working fluid at predetermined times, and wherein the housing includes an EM radiation transmitting portion having a sufficient area and a sufficient transparency such that more than 25% of the thermal energy directed into the working fluid by the heating means is radiative emitted through the EM radiation transmitting portion as black body EM radiation emitted by the solid elements of the working fluid.

    Process and system for extracting useful work or electricity from thermal sources
    8.
    发明授权
    Process and system for extracting useful work or electricity from thermal sources 有权

    公开(公告)号：US10711653B2

    公开(公告)日：2020-07-14

    申请号：US16066662

    申请日：2016-12-28

    Applicant: BOUNDARY TURBINES INC

    Inventor： Darrell Ford

    IPC: F01K27/00 ,  F01K25/08 ,  F03G6/00 ,  F01K7/10 ,  F01K7/32 ,  F01K13/02 ,  F03G6/06 ,  F03G7/04 ,  H02K7/18 ,  F02G1/04

    Abstract: A process and system of extracting useful work or electricity from a thermal source, wherein heat energy from the thermal source is used in the form of a heated collection fluid; a first side of a heat exchanger is filled with a liquid or supercritical working fluid; fluid flow out of the first side of the heat exchanger is closed such that a fixed volume of the working fluid is maintained in the first side; the heated collection fluid flowed through a second side of the heat exchanger that is adjacent to the first side to affect a transfer of heat from the heated collection fluid to the fixed volume of the working fluid to raise its temperature and pressure; the pressurized working fluid is released from the first side of the heat exchanger upon the working fluid reaching a threshold state; a flow of the pressurized working fluid is directed to an expander capable of converting the kinetic energy of the pressurized working fluid into useful work or electricity; and the foregoing steps are repeated. A plurality of such operably coupled heat exchangers may be used in a manner such that the timing of the pressurized working fluid from each heat exchanger to the expander is offset.

    Thermoacoustic electric generator system
    9.
    发明授权
    Thermoacoustic electric generator system 有权

    公开(公告)号：US10113440B2

    公开(公告)日：2018-10-30

    申请号：US15564657

    申请日：2016-03-22

    Applicant: CENTRAL MOTOR WHEEL CO., LTD.

    Inventor： Noriyuki Fukaya

    IPC: F01D15/10 ,  H02K7/18 ,  F03B13/00 ,  F01D1/04 ,  F03G7/00 ,  F02G1/04 ,  F02C1/10 ,  F02C6/00

    Abstract: A thermoacoustic electric generator system includes: a thermoacoustic engine provided in an annular tube; a turbine provided in a branched tube and rotating when receiving acoustic energy, which is generated by thermoacoustic oscillation of working gas in the thermoacoustic engine; and a generator for converting kinetic energy, which is generated by rotation of the turbine, to electric energy. The turbine is provided at a specified position that belongs to a region between a first position and a second position in each region of the branched tube, the first position being an intermediate position between one end and the other end, and the second position being an intermediate position between the first position and the other end.

    Stirling engine with regenerator internal to the displacer piston and integral geometry for heat transfer and fluid flow
    10.
    发明授权
    Stirling engine with regenerator internal to the displacer piston and integral geometry for heat transfer and fluid flow 有权

    公开(公告)号：US10087883B2

    公开(公告)日：2018-10-02

    申请号：US15177329

    申请日：2016-06-08

    Applicant: Alan Carl Holsapple

    Inventor： Alan Carl Holsapple

    IPC: F02G1/04 ,  F02G1/057 ,  F02G1/055 ,  F02G1/043

    Abstract: A Stirling engine with internal regenerator and integral geometry for heat transfer and fluid flow has a displacer piston with a plurality of cavities traversing through the displacer piston and arranged in a specific cross sectional geometry. A heater head has heater fin protrusions that are arranged in the specific geometry, and a cooling bridge has cooler fin protrusions that are in the specific geometry. The displacer piston alternates between the heater head and the cooling bridge, with the cavities of the piston alternately enveloping the heater protrusions and the cooling protrusions, providing more efficient heat transfer to and from the working fluid. Each cavity in the displacer also contains a regenerator core, further improving heat transfer efficiency. The heater fin protrusions may also contain thermally conductive cores. A bellows assembly may also be used to seal the displacer piston from the heater head in order to reduce unswept volume.

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