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For example, this could be transferring heat from a hot flow of liquid to a cold one, or transferring the concentration of a dissolved solute from a high concentration flow of liquid to a low concentration flow. The counter-current exchange system can maintain a nearly constant gradient between the two flows over their entire length of contact ...
The number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow exchangers) when there is insufficient information to calculate the log mean temperature difference (LMTD). Alternatively, this method is useful for determining the expected heat ...
U is the heat transfer coefficient (watts per kelvin per square meter), A is the exchange area. Note that estimating the heat transfer coefficient may be quite complicated. This holds both for cocurrent flow, where the streams enter from the same end, and for countercurrent flow, where they enter from different ends.
Countercurrent (A) and cocurrent (B) There are three primary classifications of heat exchangers according to their flow arrangement.In parallel-flow heat exchangers, the two fluids enter the exchanger at the same end, and travel in parallel to one another to the other side.
The rete mirabile utilizes countercurrent blood flow within the net (blood flowing in opposite directions) to act as a countercurrent exchanger. It exchanges heat, ions, or gases between vessel walls so that the two bloodstreams within the rete maintain a gradient with respect to temperature, or concentration of gases or solutes.
Pages for logged out editors learn more. Contributions; Talk; Counter-current heat exchange
Countercurrent exchange, where two flowing bodies flowing in opposite directions to each other exchange, for example, heat; Counterflow lane a lane in which traffic flows in the opposite direction; Counterflow Centrifugation Elutriation (CCE) a cell separating technique; Counterflow in Cooling tower
One common example of a heat exchanger is a car's radiator, in which the hot coolant fluid is cooled by the flow of air over the radiator's surface. [34] [35] Common types of heat exchanger flows include parallel flow, counter flow, and cross flow.
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