Please explain how to calculate the nozzle movement of Air Fin Cooler in header axial direction. The particular problem faced by us is as follows:

The inlet and outlet nozzle of AFC is located on stationary side(normal case) . There are four header each having four nozzles( 2 inlet top nozzles and 2 outlet bottom nozzles) . AFC is loacted along global X axis. Header is loacted along Z axis. Nozzles are along Y axis. we need to calculate the nozzle displacement along z axis.

Reagrds,
MKS

In order to obtain (calculate) the nozzle displacement, you must model the AFC in the piping model. Equipment is typically modeled as a series of dummy rigid elements, from the base support (anchor). A typical model would involve:

• Model up from the support to the equipment centerline with a dummy rigid element. This element would be at temperature, to address the growth of the equipment.
• Model other similar elements as necessary, to the centerline of the equipment.
• Model the centerline of the equipment, using dummy rigid elements, spanning from the elements connected to the supprots. This element is also at temperature.
• From the centerline, model additonal dummy rigid elements to the shell/surface of the equipment where the nozzle(s) is (are). These elements are also at temperature.
• If appropriate, you can model the nozzle flexibility using either WRCC297 or PD550 nozzles.
• Connect your piping elements to the nozzle node(s).

Now the analysis will yield the nozzle displacements as a function of temperature.

Details of the equipment, such as slotted bolt holes in the base plates, or gaps for header movement must be discussed with the vendor on a case by case basis.

Richard!What you mean is to model the centerline of the equipmnet as rigid element?

Yes.