CHEN 4501W Lecture Notes - Lecture 35: Reboiler, Dew Point, Bubble Point
23 Nov 2015
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Next week --> recitation oral progress on reports. Engineer presents next week: calculate heat exchange in condenser and reboiler. => calculate capital cost --> heat exchange area. Cw partial condenser is for light components that can"t condense sat. vapor at dew point saturated liquid at bubble point condensing vapor stream. Tcwout <= 120 f want lower to prevent scaling and corrosion cooling water. Cw, tcwin 90 f distance through condenser if pure component, dew point and bubble point are same. Aside: by setting column pressure, we typically have. Size heat exchanger by considering heat transfer between the streams: => see table from doherty & malone, attached to hw 4 or 5. Finally, calculate area estimate the capital cost of teh condenser: reboiler. Molar balance on trays above and below feed q = quality of the feed. For a liquid feed, q = 1 => vb = v. Tb = bubble point saturated liquid distance through reboiler.
