Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

Abstract

On the basis of the equation of state and the phase equilibrium equations of helium-3 ( 3 He), a computer program for calculating the thermodynamic properties of 3 He has been created. With this program, many iso-property tables were prepared for generating p-h and T-s diagrams of 3 He over the range of temperature from 0.2 K to 300 K and pressures up to 300 MPa. Compared with the previous diagrams plotted with interpolated experimental data sets, the new ones are more thermodynamically consistent and cover a broader temperature and pressure range. The estimated overall random errors of the diagrams are within 2 %.

Performance of cryogenic regenerator with 3He as working fluid

“…These properties for 3 He and 4 He are taken from Huang et al [10,11] and McCarty [12], respectively. The compressibility curves for both 3 He and 4 He with respect to temperature are plotted in Figure 2.…”