REMOVABLE ELECTRIC PROPULSION SYSTEM FOR A ROLLING OBJECT WITH A DEVICE FOR RELEASING THE HANDLEBAR

    公开(公告)号:US20230117322A1

    公开(公告)日:2023-04-20

    申请号:US17913964

    申请日:2021-03-12

    摘要: The present invention relates to a removable electric propulsion system (1) intended to be coupled to a rolling object. Propulsion system (1) comprises a frame (2) provided with at least one wheel (3) driven by an electric machine, and at least one non-driven wheel (4), a handlebar (20) and means (5) for coupling the propulsion system to the rolling object, coupling means (5) comprising means for gripping and lifting at least one wheel of the rolling object. Handlebar (20) comprises a connection with frame (2) and/or driven wheel (3). Furthermore, the connection comprises a means (12) for locking/unlocking the handlebar relative to frame (2) and/or to a driven wheel (3) from a locking position where handlebar (20) is attached to frame (2) and/or to driven wheel (3), this locked position of handlebar (20) enabling electric propulsion system (1) to be moved by means of handlebar (20), to an unlocking position enabling at least free motion of handlebar (20) relative to frame (2) and/or driven wheel (3).

    OPTIMIZED DEPOLYMERIZATION PROCESS BY GLYCOLYSIS OF A POLYESTER COMPRISING POLYETHYLENE TEREPHTHALTE

    公开(公告)号:US20230049514A1

    公开(公告)日:2023-02-16

    申请号:US17791545

    申请日:2020-12-21

    IPC分类号: C08J11/24

    摘要: The invention relates to a process of depolymerization of a polyester feedstock comprising PET, which comprises: a) a conditioning step; b) a glycolysis step in the presence of diol; c) a step of separation of the diol, producing at least a gaseous diol effluent, at least a liquid diol effluent and a liquid monomers effluent; g) a step of separating said liquid monomers effluent into a heavy impurities effluent and a prepurified monomers effluent, this step being conducted with a residence time of less than 10 min; e) a step of decolourizing the prepurified monomers effluent, in the presence of at least one adsorbent, and f) a diol purification step, which is supplied with at least a gaseous diol effluent and at least a liquid diol effluent, which are obtained from step c), and which produces a purified diol effluent and one or more impurities effluent(s).

    Control method and associated control system

    公开(公告)号:US11581837B2

    公开(公告)日:2023-02-14

    申请号:US17298804

    申请日:2019-11-22

    IPC分类号: H02P27/08 H02P21/22 H02P27/12

    摘要: The object of the invention is a method of controlling a permanent-magnet synchronous or synchro-reluctant three-phase rotary machine (4), comprising the following steps:
    measuring a current (iA, iB, iC) flowing through each phase of a stator of rotary machine (4);
    first calculating, by use of a single proportional-integral controller, a switching control signal for controlling an inverter (10), according to each measured current (iA, iB, iC), and of a target value (Tref) of a mechanical torque provided by the rotary machine (4) or of a target value of an angular speed of a rotor of rotary machine (4) in relation to the stator wherein the inverter (10) is configured to convey electrical energy between a continuous electrical energy source (8) and each phase of the stator of rotary machine (4); and controlling the inverter (10) by use of the calculated switching control signal.

    Method for hydrocarbon recovery from an underground formation by injection of a saline aqueous solution comprising a surfactant

    公开(公告)号:US11578573B2

    公开(公告)日:2023-02-14

    申请号:US17307728

    申请日:2021-05-04

    IPC分类号: E21B43/20 C09K8/584

    摘要: The invention relates to a method for recovery of hydrocarbons present in an underground formation by injection of a saline aqueous solution comprising at least one surfactant, by means of a numerical flow simulator including a model of the evolution of the interfacial tension between the saline aqueous solution and the hydrocarbons as a function at least of salinity, wherein the interfacial tension evolution model is calibrated as follows: i) carrying out interfacial tension measurements for a plurality of emulsions having distinct salinity values corresponding at least to the optimum salinity, to two salinities bounding the optimum salinity in a 5-10% limit, to the zero salinity and to the solubility limit of the salts; ii) determining the constants of the interfacial tension evolution model by minimizing a difference between the model and the interfacial tension measurements.