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Fluid flow in opposite directions in adjacent parts of an apparatus, as in a heat exchanger.



a pattern of movement of working liquids or gases in a heat exchanger whereby fluids divided by a wall flow in opposite directions; the heat transfer occurs through the wall. In comparison with other heat-exchanger configurations, such as the parallel-flow and cross-flow types, the average temperature difference between the working fluids in a counterflow exchanger is higher; thus, the same thermal effect can be achieved with a smaller heating surface.

References in periodicals archive ?
Yet, flexibility is left for the choice between parallel, cross or counterflow.
At low ambient air temperatures, condensation occurs at the exhaust air side of a counterflow heat exchanger.
The DynaSand filter is based on the counterflow principle (see diagram).
Typical towers used in our region include induced draught counterflow, induced draught crossflow and forced draught cooling towers.
The unit is a counterflow, induced draft, axial fan design that operates between 41 and 2,500 ammonia tons.
With improved thermal performance, the counterflow designs such as Delta's have less of an environmental impact than crossflow designs.
The counterflow heat exchanger with hot side recirculation results in efficiencies of 90%+.
It requires good counterflow heat exchange, and the expected benefit can turn into a disadvantage when this requirement is not met.
Extracting heat from within the enclosure and releasing it into the surrounding environment the exchangers operation is based on the counterflow principle.