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Indexed by:会议论文

Date of Publication:2012-06-23

Included Journals:EI、CPCI-S、SCIE、Scopus

Volume:512-515

Page Number:1258-1262

Key Words:Ionic liquid; working pair; absorption heat transformer; thermodynamic performance; waste heat

Abstract:In present research ionic liquid, 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and water were taken as the new working pair for absorption heat transformer (AHT). The thermodynamic cycle performance for this working pair was simulated based on its thermodynamic data, mass and energy balance for each component in a ART. The effects of absorption and condensing temperature on the coefficient of performance (COP), exergy efficiency (ECOP), concentration deference between dense and dilution solutions and flow rate ratio were analyzed. The cycle performance comparison for AHT using two working pairs, H2O + [MMIM][DMP] and H2O + LiBr was carried out. The results indicate that the COP and ECOP of AHT for H2O+ [MMIM][DMP] are all lower than those for H2O + LiBr, but they can still reach 0.4 and 0.5 respectively when condensing and generation temperatures are 35 and 90 degrees C respectively. The excellent physical and chemical properties of ionic liquid mentioned above together with suitable cycle performance make this new working pair to have the potential application in absorption heat pump or absorption heat transformer.