Method: Vary heat flux. Vary utility supply temperature.
Process: Net vapor rate zero.
Advantages: Cooling stream leaves unit at maximum temperature.
Condenser film temperatures at maximum.
Disadvantages: Local pump required. Response may be slow
due to system liquid inventory.
Application: Used for heat recovery to liquid streams from
condenser. Condenser coolant always runs at maximum temperature
consistent with duty removal. This can be useful to prevent localized
solidification in some processes.
Variants: Pump may be installed at exchanger outlet.
Configuration notes: When used with cooling water often
referred to as a 'tempered water' system.
Operation: Variable recycle changes temperature of cooling
stream. This, in turn, changes the exchanger LMTD.
Warnings:
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