Compressibility Determinations Without Volume Measurements

Abstract

The author describes a new method of determining the isothermal deviations of a real gas from compliance with ideal gas laws. This method eliminates all volume and mass measurements from the experimental observations, and permits calculation of the deviations from observations of pressures and temperatures only.

PVTx Properties of the R245fa/R1234ze(E) for Low-Temperature Organic Rankine Cycle

“…In this paper, the PVTx properties of the R245fa/R1234ze­(E) mixed working fluid are measured by the high-precision Burnett experiment bench. The principle of the Burnett method was proposed by E. S. Burnett in 1936 and was used frequently in measurements by many scholars. − The fundamental principle is to measure a series of expansion pressures by the method of isothermal expansion in order to calculate the compressibility factor Z . Then, according to the definition of compressibility factor, the gas density of the measured working fluid can be calculated.…”

Experimental Study on the PVTx Properties of the R1234ze(E)/R152a System by the Burnett Method

“…In this article, the Burnett method was used to determine the PVTx properties of the R1234ze­(E)/R152a binary mixed refrigerant. The principle of the Burnett method was proposed by E. S. Burnett in 1936 and has been used in measurements by many scholars. − In the Burnett method, a series of expansion pressures on the isotherm are measured first, and then the compressibility factor Z is determined by using eqs –. Its advantage is that the container volume and the quality of the gas no longer need to be measured.…”

Second and third virial coefficients of three binary mixtures containing xenon, at 273 K: Comparison between Xe + C2H6, Xe + C2H4and Xe + CO2

“…The procedure for making isothermal measurements was originally presented by Burnett. 26 Briefly, the volume V 1 was initially charged with the gas to be studied and, after equilibration, the pressure p 1 and the temperature were measured. The expansion valve was then opened and the pressure was allowed to equalize between chamber V 1 and chamber V 2 (previously evacuated to about 1 Pa).…”