According to previous investigation on organic rankine cycle (ORC) and absorption refrigeration cycle, this work chose three potential working pairs for absorption power cycle. They are 1,1,1,3,3-pentafluoropropane (R245fa) + N,N-dimethylformamide (DMF)/diethylene glycol dimethylether (DMEDEG)/N-methyl-2-pyrrolidone (NMP). The vapor-liquid equilibrium (VLE) data of the three systems have been measured under a temperature range from 293.15 to 353.15 K and pressure range from 15 to 800 kPa. The experimental data were correlated using the five-parameter non-random-two-liquid (NRTL) model. The average relative deviations between the experimental data and the calculated data are 1.52 %, 1.92 % and 1.81 %, respectively, and maximum relative deviations are 4.03 %, 4.05 % and 3.97 %, respectively. The affinity of the three systems has been compared under the different conditions of 303.15 K and 323.15 K. Result shows that the solubility of R245fa in DMF and DMEDEG is similar while the solubility of R245fa in NMP is smaller. In addition, the affinity between R245fa and the three absorbents was also discussed based on the molecule structure and the hydrogen bond interacted between the molecules.
Compounds
#
Formula
Name
1
C3H3F5
1,1,1,3,3-pentafluoropropane
2
C3H7NO
dimethylformamide
3
C6H14O3
2,5,8-trioxanonane
4
C5H9NO
N-methylpyrrolidone
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.