A chemical works produces an aqueous effluent at above ambient temperature. The Environmental Agency insists that before the effluent is discharged to the river, it must be cooled.
A forced draught counter current cooling tower is available. When tested it provided the following results:
Determine the approximate number of gas transfer units achieved. DATA:
Heat capacity of liquid water: 4.19 kJ kg K .
[It may be assumed that the resistance to heat transfer in the liquid phase is negligible].