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Modeling of the flow comparator as calibration device for high pressure natural gas flow metering in Modelica

机译:流量比较器的建模作为模型高压天然气流量计量的校准装置

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摘要

The German national metrological institute, Physikalisch-Technische Bundesanstalt, is developing a new concept a for a volumetric primary standard to calibrate high pressure gas flow meters. The TUHH is supporting these Research & Development activities with its competence to elaborate computational models for detailed analysis of complex electromechanical systems including fluid flow aspects. The new primary standard is called Flow Comparator and uses an actively driven piston prover to measure the gas flow rate using the time the piston needs to displace a defined enclosed volume of gas in a cylinder. A computational model is developed in Modelica (R) to investigate the Flow Comparator's dynamic behavior and interaction with other components in the loop. The validation of the developed model shows good compliance with measured piston velocity and differential pressure at the piston. The model is used to optimize the frequency inverter's control voltage trajectory to increase the available calibration time.
机译:德国国家计量研究所Physikalisch-Technische Bundesanstalt,正在开发一种用于校准高压气体流量计的体积初级标准的新概念A. Tuhh正在支持这些研究和开发活动,并能够详细说明计算模型,以便详细分析包括流体流动方面的复杂机电系统。新的主要标准称为流量比较器,并使用主动驱动的活塞先驱使用活塞需要在气缸中取代限定的封闭体积的气体来测量气体流速。在Modelica(R)中开发了计算模型,以研究流量比较器的动态行为和与循环中其他组件的交互。开发模型的验证显示出良好的遵守活塞处的活塞速度和差压。该模型用于优化变频器的控制电压轨迹以增加可用的校准时间。

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