Counter Flow Heat Exchanger Equations

For a parallel flow heat exchanger n 0 and for a counterflow heat exchanger n 1.

Counter flow heat exchanger equations.

The effectiveness ntu relationships for crossflow heat exchangers and various types of shell and tube heat exchangers can be derived only numerically by solving a set of partial differential equations. Consider a parallel flow or counterflow heat exchanger consisting of fluid 1 fluid 2 and the wall separating these two fluids. The most common arrangements for flow paths within a heat exchanger are counter flow and parallel flow. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions in a concentric tube or double pipe construction.

For counter current flow heat exchanger with. We combine these two types together with an index n to indicate the flow direction of fluid 2. In the parallel flow arrangement of figure 18 8 a the hot and cold fluids enter at the same end flow in the same direction and leave at the same end. You can then use this model to simulate the heat exchanger performance and to verify if it will meet your.

In a parallel flow exchanger both fluids in the heat exchanger flow in the same direction. A counter flow heat exchanger is one in which the direction of the flow of one of the working fluids is opposite to the direction to the flow of the other fluid. We already saw that the design of a shell and tube heat exchanger is an iterative process. Often engineers prefer to use a heat exchanger design software to create a heat exchanger model.