Absorption of isobutane in three linear chained Pentaerythritol (cas 115-77-5) esters between 293.15 and 348.15 KAbsorption d'isobutane dans trois esters de pentaérythritol en chaîne linéaire entre 293,15 et 348,15 K
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Add time:08/28/2019 Source:sciencedirect.com
Isobutane (R600a) is widely used in small capacity refrigeration equipment, especially domestic refrigerator. Knowledge of refrigerant absorption in lubricant oil is one of the essential factors for designing refrigeration system and choosing suitable oil. In this work, the liquid mole fractions of R600a in three linear chained Pentaerythritol (cas 115-77-5) esters (pentaerythritol tetrabutyrate, pentaerythritol tetrahexanoate, and pentaerythritol tetraoctanoate) were measured from 293.15 K to 348.15 K by means of isochoric saturation method. The measured data were modeled using the PR EOS and HVOS mixing rule combined with Wilson excess free-energy model. Average relative deviations between the calculated pressure from the model and measured results for R600a + pentaerythritol tetrabutyrate, R600a + pentaerythritol tetrahexanoate, and R600a + pentaerythritol tetraoctanoate systems were 0.74%, 0.90%, and 0.57%, respectively. Maximum relative deviations were 2.13%, 2.91%, and 2.13%, respectively.
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