Liquid thermal conductivity of binary mixtures of difluoromethane (R32) and pentafluoroethane (R125)

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF02575243· OSTI ID:675519

Ro, S T; Kim, M S; Jeong, S U ^[1]

---

1. Seoul National Univ. (Korea, Republic of). Dept. of Mechanical Engineering

The thermal conductivities of refrigerant mixtures of difluoromethane (R32) and pentafluoroethane (R125) in the liquid phase are presented. The thermal conductivities were measured with the transient hot-wire method with one bare platinum wire. The experiments were conducted in the temperature range of 233--323 K and in the pressure range of 2--20 MPa. An empirical equation to describe the thermal conductivity of a near-azeotropic mixture, R32 + R125, is provided based on the measured 168 thermal conductivity data as a function of temperature and pressure. The dependence of thermal conductivity on the composition at different temperatures and pressures is also presented. The uncertainty of the measurements is estimated to be {+-}2%.

• Sponsoring Organization: USDOE
• OSTI ID: 675519
• Journal Information: International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 4 Vol. 18; ISSN 0195-928X; ISSN IJTHDY
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BINARY MIXTURES
FLUORINATED ALIPHATIC HYDROCARBONS
MATERIAL SUBSTITUTION
PRESSURE DEPENDENCE
REFRIGERANTS
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY