Steady Under Pressure: Distillation Pressure Control - Method 21

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Method 21: 3E :  Control condenser inlet coolant temperature. Air cooler.

Method: Vary heat flux. Vary utility (air) supply temperature.
Process: Net vapor rate zero.
Advantages: Exchanger film temperatures at maximum.
Disadvantages: Requires thorough mixing of air for stable operation.
Application: Condenser always runs at maximum temperature consistent with duty removal. This can be useful to prevent localized solidification in some processes. Often used in climates that may have very cold operating days to prevent plugging from solids.
Configuration notes:
Operation: Temperature controller manipulates total air rate, net air rate, circulating air rate, as required. Variable LMTD controls heat removal.

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This page updated 03 April 2000.
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