Operating method for a cryopressure tank

    公开(公告)号:US09784410B2

    公开(公告)日:2017-10-10

    申请号:US14494985

    申请日:2014-09-24

    IPC分类号: F17C7/00 F17C1/00

    摘要: An operating method is provided for a cryopressure tank in which cryogenic hydrogen for supplying a motor vehicle fuel cell can be stored under supercritical pressure at 13 bar or more. In order to compensate the pressure drop resulting from removal of hydrogen from the cryopressure tank, either a heat transfer medium is supplied to a heat exchanger provided in the cryopressure tank via a control valve over a period of time which significantly exceeds the cycle times of a conventional cycle valve or the heat transfer medium is not supplied to the heat exchanger. Depending on the fill level of the cryopressure tank, the control valve is actuated with respect to a desired temperature or a desired pressure of the hydrogen in the cryopressure tank. As long as there is a risk of liquefaction of the residual hydrogen in the cryopressure tank, as is the case when the temperature falls below the critical temperature of 33 K if the pressure drops below the critical pressure of approximately 13 bar, during the removal of cryogenic hydrogen from the cryopressure tank, the temperature is adjusted such that it does not drop below the critical temperature of 33 Kelvin. If the fill state in the cryopressure tank drops further, the pressure in the cryopressure tank is adjusted when there is no longer a risk of liquefaction such that the pressure does not drop below a minimum pressure value which the hydrogen that is removed from the cryopressure tank must have in order to be usable in the consumer without restricting the function thereof.

    Method for Filling a Tank with Pressurized Gas
    8.
    发明申请
    Method for Filling a Tank with Pressurized Gas 审中-公开
    用加压气体填充罐的方法

    公开(公告)号:US20140174593A1

    公开(公告)日:2014-06-26

    申请号:US14234330

    申请日:2012-06-13

    IPC分类号: F17C5/06

    摘要: Method for filling a tank with pressurised gas, the method comprising: a step of measuring the initial pressure (P(t0)) in the tank, a step of determining the initial quantity (m(t0)) of gas in the tank, a step of measuring the current pressure (P(ti)) in the tank, a step of determining the current quantity (Q(ti)) of gas transferred into the tank, a step of calculating the current quantity (m(ti)) of gas in the tank, a step of determining the current temperature (T(ti)) of the gas in the tank, the method being characterised in that, for the step of determining the current temperature (T(ti)) of the gas in the tank, said temperature (T(ti)) is expressed and calculated solely as a function of the variables consisting of the current pressure (P(ti)) in the tank and the current quantity (m(ti)) of gas in the tank; the expression of the current temperature (T(ti)) as a function of the current pressure (P(ti)) and the current quantity (m(ti)) of gas in the tank being obtained from the state equation for the real gases in the tank P(ti)·V·105=Z·n·R·T(ti), the compressibility factor Z being expressed as a function of the temperature T(ti) and the pressure P(ti) of the gas in the tank according to a first-degree formula Z(ti)=(e·T(ti)+f)·P(ti)+g.

    摘要翻译: 用加压气体填充罐的方法,所述方法包括:测量罐中的初始压力(P(t0))的步骤,确定罐中气体的初始量(m(t0))的步骤, 测量罐中当前压力(P(ti))的步骤,确定转移到罐中的气体的电流量(Q(ti))的步骤,计算当前量(m(ti))的步骤 罐中的气体,确定罐中气体的当前温度(T(ti))的步骤,其特征在于,在确定气体的当前温度(T(ti))的步骤中, 所述罐,所述温度(T(ti))仅作为由所述罐中的当前压力(P(ti))和所述罐中的气体的当前量(m(ti))组成的变量的函数而被表达和计算 坦克; 根据实际气体的状态方程式获得的罐中气体的当前温度(T(ti))与当前压力(P(ti))和当前数量(m(ti))的函数的表达式 在罐P(ti)·V·105 = Z·n·R·T(ti)中,压缩系数Z表示为温度T(ti)和气体的压力P(ti)的函数 根据一级公式Z(ti)=(e·T(ti)+ f)·P(ti)+ g。