14.3.2 Specifying Heat Exchanger Performance Data

Based on the heat transfer model you choose in the Model Data tab, some performance data must be entered for the heat exchanger.

• ntu-model: For the ntu-model you will provide the heat transfer for different primary and auxiliary fluid flow rates. Click the Heat Transfer Data... button to open up a tabular dialog box. Set the Number of auxiliary flow rates and primary fluid flow rates. The dialog box will resize itself accordingly. You will need to provide various primary fluid flow rates and auxiliary fluid flow rates and the corresponding heat transfer values. You may write this data to a file that can be read later.

• simple-effectiveness-model: For this model, you will need to provide velocity versus effectiveness data. To provide this you can click the Velocity Effectiveness Curve... button. This will open up a tabular dialog box. In this dialog box, you can set the number of points in the curve, then you can provide velocities and corresponding effectiveness values. This data can be written to a file and read back.