Ionic liquids are salts, usually with organic cations and inorganic anions, that are liquid at room temperature. There are a wide variety of ionic liquids that can be synthesized with different properties for different applications. They are generally non-volatile, non-toxic, and non-flammable with high heat capacity, high density, high thermal and chemical stability. We propose its use as an absorbent in an absorption refrigeration cycle. The refrigerant in this case would be a gas such as carbon dioxide. The present work deals with the desirable properties of ionic liquids for this application. For example, the absorbent must have a high solubility, and the heat and mass transfer coefficients of the absorbent-refrigerant solution must be large. The viscosity of the mixture, on the other hand, should not be so large as to make its pumping difficult.
The Use of Ionic Liquids in Refrigeration
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Sen, M, & Paolucci, S. "The Use of Ionic Liquids in Refrigeration." Proceedings of the ASME 2006 International Mechanical Engineering Congress and Exposition. Process Industries. Chicago, Illinois, USA. November 5–10, 2006. pp. 131-134. ASME. https://doi.org/10.1115/IMECE2006-14712
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