Counter Flow Heat Exchanger Equations

For counter current flow heat exchanger with.

Counter flow heat exchanger equations.

Using these shell tube 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. For a parallel flow heat exchanger n 0 and for a counterflow heat exchanger n 1. We combine these two types together with an index n to indicate the flow direction of fluid 2.

The most common arrangements for flow paths within a heat exchanger are counter flow and parallel flow. So there is no analytical formula for their effectiveness but just a table of numbers or a. The heat exchanger design equation can be used to calculate the required heat transfer surface area for a variety of specified fluids inlet and outlet temperatures and types and configurations of heat exchangers including counterflow or parallel flow. 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.

In a parallel flow exchanger both fluids in the heat exchanger flow in the same direction. 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. We already saw that the design of a shell and tube heat exchanger is an iterative process. You can then use this model to simulate the heat exchanger performance and to verify if it will meet your.