Counter Flow Heat Exchanger Graph

For example in a distillation column the vapors.

Counter flow heat exchanger graph.

The number of transfer units ntu method is used to calculate the rate of heat transfer in heat exchangers especially counter current exchangers when there is insufficient information to calculate the log mean temperature difference lmtd. The flowing bodies can be liquids gases or even solid powders or any combination of those. Crossflow parallel flow and counterflow heat exchanger configurations are three examples. A counterflow heat exchanger will require less heat exchange surface area than a parallel flow heat exchanger for the same heat transfer rate and the same inlet and outlet temperatures for the fluids.

Energy balance of the hexagonal heat exchanger. The efficiency of a counter flow heat exchanger is due to the fact that the average t difference in temperature between the two fluids over the length of the heat exchanger is maximized as shown in figure 4 counter flow. A heat exchanger can have several different flow patterns. Countercurrent exchange is a mechanism occurring in nature and mimicked in industry and engineering in which there is a crossover of some property usually heat or some chemical between two flowing bodies flowing in opposite directions to each other.

The operation of the hexagonal heat exchanger in a ventilation unit is subject to the laws of thermodynamics with the basis for calculating its operating parameters as shown below figures 2a and 2b present the basic thermodynamic transformations for heat recovery applications as illustrated on the mollier or psychrometric chart.