In this report, we have examined the behavior of heat capacities and Joule-Thomson coefficients in low- and moderate-density regions based on recent theoretical studies of the ideal-gas heat capacity and virial coefficients of R-32, R-125, R-134a, R-143a, and R-152a. The results have been compared with those derived from empirical equations of state which have been recently developed, based on a large quantity of experimental data for these refrigerants. Both results are in good agreement. Proper behaviors for these second-derivative properties justify the use of the empirical equations of state in low-temperature and low-density regions where no experimental data are available.
|Number of pages||8|
|Journal||International Journal of Thermophysics|
|Publication status||Published - 1999 Jan 1|
|Event||Proceedings of 1997 13th Symposium on Thermophysical Properties - Boulder, CO, USA|
Duration: 1997 Jun 22 → 1997 Jun 27
ASJC Scopus subject areas
- Condensed Matter Physics