Journal
APPLIED ENERGY
Volume 98, Issue -, Pages 326-332Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2012.03.044
Keywords
Vapor pressure; Heat capacity; [DMIM]DMP; Absorption cycle working pair; Coefficient of performance
Categories
Funding
- National Natural Science Foundation of China [50890184]
- National Basic Research Program of China [2010CB227304]
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In this paper, the thermophysical properties of the H2O + 1,3-dimethylimidazolium dimethylphosphate ([DMIM]DMP) system were studied. The boiling point method was adopted to measure the vapor pressures of the system at mass fraction of ionic liquids (ILs) in the range from 0.10 to 0.90 as well as pressures range from 2 kPa to 101 kPa. And the general non-random two-liquid (NRTL) activity coefficient model was used to correlate the experimental data. The heat capacities of the system were determined by a BT2.15 Calvet microcalorimeter at mass fraction of Its in the range from 0.10 to 0.90 and temperatures range from 303.15 K to 353.15 K. A polynomial equation on temperature and concentration was correlated with satisfactory results. And then theoretical analysis of the coefficient of performance (omega) of a single-effect absorption refrigeration cycle was simulated using H2O +[DMIM]DMP as working pair on the basis of the models of vapor pressure and heat capacity. The simulation results show that the omega of H2O + [DMIM]DMP system is close to that of conventional working pair H2O + LiBr. In addition, the H2O + [DMIM]DMP system improved the limitations of crystallization and corrosion of H2O + LiBr system. (c) 2012 Elsevier Ltd. All rights reserved.
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