THERMAL GAS FLOWMETER COMPRISING A GAS QUALITY INDICATOR

    公开(公告)号:AU2003290747A1

    公开(公告)日:2004-03-11

    申请号:AU2003290747

    申请日:2003-07-22

    Abstract: Method for measuring gas consumption using a gas meter, especially for measuring gas energy consumption, whereby the meter is suitable for measuring both a gas mass flow and energy consumption in that the meter determines the gas type and if it is incombustible calculates a mass flow in weight or volume units, liters per minute (l/min), while if it is combustible calculates consumption in energy units, kWh. An independent claim is made for a gas meter that functions as both a mass flowmeter and an energy meter, having a gas quality sensor with means for determining a gas parameter that is indicative of whether the gas is combustible or not. To determine the gas type its heat conductivity, heat capacity, diffusivity or viscosity are calculated, from which the gas mixture can be determined.

    65.
    发明专利
    未知

    公开(公告)号:DE10134455A1

    公开(公告)日:2003-01-30

    申请号:DE10134455

    申请日:2001-07-16

    Abstract: The invention relates to an evaluation method for flowmeters, which complicates the manipulation, by an unauthorised person, of the total amount used. According to the invention, instantaneous consumption values (Ci) are stored in a non-volatile memory, preferably an annular memory, and are periodically read out and analysed.

    69.
    发明专利
    未知

    公开(公告)号:DE19939942A1

    公开(公告)日:2001-03-01

    申请号:DE19939942

    申请日:1999-08-23

    Abstract: An electrical measuring device for detecting a fluid-energy parameter has at least two temperature sensors for the determination of a forward flow temperature and a reverse flow temperature in addition to a flow meter. The flow meter is one of the at least two temperature sensors. Said has a pulsed electrical heating element (21, 22) and a sensor element (21) which can be brought into thermal contact with the sample fluid whose electrical resistance is temperature dependent. The sensor element (21) can be warmed up by the heating element (21, 22). Means are provided for the determination of the amount of fluid which flows through and which monitor heating and/or cooling process in the sensor element (21) over time.

Patent Agency Ranking