HELMHOLTZ STATE EQUATION FOR OXYGEN, NITROGEN AND ARGON
Based on an extensive literature survey, together with programming of equation of state explicit in Helmholtz energy and Bender equation, a comparison between these two equations of state has been made extensively concerning the p-ρ-T properties of oxygen, nitrogen and argon. Of all the regions examined, with temperature covering from triple-point temperature of fluids concerned to 520K and pressure from 0.1MPa to100MPa, special attention is paid to the saturation region and near-critical region. Calculated values of two equations of state are compared with highly precise experimental data, with several typical figures of error bar drawn. It has been confirmed that Helmholtz state equation possesses evident superiority over Bender equation in the whole range of normal state fluid. This result will be helpful to promote the former equation of state to be applied in engineering fields.
equation of state Helmholtz energy thermodynamic properties oxygen nitrogen argon
L.J.MENG G.B.CHEN Z.J.HUANG
Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, 310027, China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）