# A practical density equation for saturated vapor of helium-3 from 0.01 K to the critical point

- Authors
- Journal
- Cryogenics 0011-2275
- Publisher
- Elsevier
- Publication Date
- Volume
- 48
- Identifiers
- DOI: 10.1016/j.cryogenics.2007.09.001
- Keywords

## Abstract

Abstract Based on the ideal gas state equation and the saturated vapor pressure equation of helium-3, a saturated vapor density equation is proposed, which can be applied for calculating the saturated vapor density of helium-3 from 0.01 K to the critical temperature. Above 1.4 K, the average deviation between the results by this equation and experimental data is about 0.66% and the maximum is 2%. Below 1.4 K, the results of this work show a comfortable agreement with those by virial state equation (the deviations are generally within 0.1%). Based on this new vapor density equation, the compressibility factor of saturated vapor is determined and the vaporization heat is calculated.

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