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Capacitance based mass metering for cryogenic fluids.

Author(s) : NURGE M. A., YOUNGQUIST R., WALTERS D.

Type of article: Article

Summary

The paper describes a method for measuring the mass of cryogenic fluids in on-board rocket propellant tanks or ground storage tanks. Linear approximations to the Clausius-Mossotti relationship serve as the foundation for a capacitance based mass sensor, regardless of fluid density stratification or tank shape. Sensor design considerations are presented along with the experimental results for a capacitance based mass gage tested in liquid nitrogen. This test data is shown to be consistent with theory resulting in a demonstrated mass measurement accuracy of plus or minus 0.75% and a deviation from linearity of less than about 0.30% of full scale mass. Theoretical accuracies are also shown to be plus or minus 0.73% for hydrogen and 1.39% for oxygen for a select range of pressures and temperatures.

Details

  • Original title: Capacitance based mass metering for cryogenic fluids.
  • Record ID : 2005-0004
  • Languages: English
  • Source: Cryogenics - vol. 43 - n. 9
  • Publication date: 2003/09

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