Transcription of Blends: Bof fractionation inside ful to review a few …
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Blends: Bof fractionation inside ful to review a few …
14 RSES Journal~ February 2006 Because temperature glideresults from the effectsof fractionation insidethe evaporator, it is use-ful to review a few keypoints from last month sarticle on fractionation . When two (or more) refriger-ants are mixed and they don t forman azeotrope, the vapor and liquidcompositions tend to differ. Thisoccurs because the higher-pressurerefrigerant tends to jump into thevapor faster than the other(s) andtake up more space. When individual componentshave extremely different pressures,the vapor composition will be muchdifferent than the liquid composi-tion. When the pressures are similarthe vapor composition will be closeto that of the liquid. When vapor is taken awayfrom the liquid, more liquid will boilto replace the vapor and more of thehigh-pressure component boils outof the liquid. This causes the liquidcomposition to change, becomingmore concentrated in the lower boil-ing component(s).
February 2006 ~ RSES Journal 17 forming a few drops and later becom-ing all liquid, the condensing temper-ature will drop by an amount similar to the glide seen in …
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