Add time:07/30/2019         Source:sciencedirect.com

Absorption refrigerators are expected for automotive use due to their advantage of utilizing waste heat from exhaust gas. The compactness and efficiency of the refrigeration system required for such use indicates a pair of water/lithium bromide (LiBr) as a promising working fluid. However, operation of absorption refrigerators for automotive use would be hampered by the crystallization of LiBr solution, because relatively high concentration of LiBr solution is necessary for automotive use in which the absorber should be air-cooled. Therefore, the crystallization temperature of LiBr solution needs to be reduced. In this study, we focused on LiBr + lithium iodide (LiI) + ethylene glycol (C2H4(OH)2) aqueous solution as an absorbent, due to its lower crystallization temperature compared with LiBr solution. We measured the crystallization temperature, saturated vapor pressure, density and viscosity of these solutions with different composition ratios. The measured saturated vapor pressure, density and viscosity were then correlated using proper regression equations.

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