Volumetric measurement of tank volume

摘要

A method for determining the volume of compressible gas in a system including incompressible substances in a zero-gravity environment consisting of measuring the change in pressure ( DELTA P) for a known volume change rate ( DELTA V/ DELTA t) in the polytropic region between isothermal and adiabatic conditions. The measurements are utilized in an idealized formula for determining the change in isothermal pressure ( DELTA Piso) for the gas. From the isothermal pressure change ( DELTA Piso) the gas volume is obtained. The method is also applicable to determination of gas volume by utilizing work (W) in the compression process. In a passive system, the relationship of specific densities can be obtained.