Helmholtz free energy equation of state for propane and R134a binary mixture

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Haiyang Zhang
  • Bo Gao
  • Huiya Li
  • Quan Zhong
  • YanYan Chen
  • Wenjing Liu
  • Yaonan Song
  • Yanxing Zhao
  • Xueqiang Dong
  • Maoqiong Gong
  • Ercang Luo
  • Jianying Hu

Detail(s)

Original languageEnglish
Pages (from-to)1-10
Journal / PublicationInternational Journal of Refrigeration
Volume89
Online published23 Mar 2018
Publication statusPublished - May 2018
Externally publishedYes

Abstract

In this work, a Helmholtz free energy equation of state for R290 + R134a based on the multi-fluid approximations model was developed to describe the thermophysical properties of the binary mixture. The present equation shows more competitive than the default equation in REFPROP 9.1 (Lemmon et al., 2013). It covers a temperature range of (252–400) K and pressures up to 6.1 MPa. The estimated standard uncertainties of the present equation are 0.70% and 0.90% for the bubble point and dew point pressures, 0.26 K and 0.29 K for the bubble point and dew point temperatures, 0.13% and 0.60% for the saturated liquid and vapor densities, respectively. The main purpose is to provide a useful model for R290 + R134a, and thus to promote its better applications for the design and optimization of the refrigeration systems.

Research Area(s)

  • Binary mixture, Equation of state, Helmholtz free energy, R134a, R290, Refrigerant

Citation Format(s)

Helmholtz free energy equation of state for propane and R134a binary mixture. / Zhang, Haiyang; Gao, Bo; Wu, Wei et al.

In: International Journal of Refrigeration, Vol. 89, 05.2018, p. 1-10.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review