07/02/2023

COILS 9.0! Length & pressure drop of capillary tubes

Coils gets a major update. Version 9.0 Build 230206 is available for download, for all customers in regular technical support! In this Major Update in early 2023 we have introduced the calculation of length and pressure drop of capillary tubes in direct expansion coils, and many other new features!

The user will be able to choose whether to set a length and calculate the pressure drops, or to set certain pressure drops and calculate the length of the capillary that realizes them! A new “Capillaries” button is available in the Manifolds section (for direct expansion coils only).

This is the capillary configuration mask where you can choose the capillary tube model (so a diameter, a thickness, and a material) and specify what kind of calculation to perform, whether to set a length and calculate the pressure drop, or to set a pressure drop and calculate the length of the capillary that makes it!

In the pressure drop detail mask, the capillaries row was added

A new page with Exchanger options has been added to the print pages, where there is the capillary section

In order to use a certain material for capillaries, you will need to set its roughness in “materials management”

We also added other very useful implementations in the “Exchanger Option” section . In previous builds, the Exchanger shape section was introduced.

This section allows you to choose coils’ shape and flow, automatically changing the factors and impact on the calculation results based on the shape and position of the exchanger.

We have added two new buttons in this section:

Fin Border

At the request of several users, in the Fin border section, it is now possible to add an embossing in the fin edge, of a few millimeters, which is in some cases used by some manufacturers. This embossing, if present, goes to act on the air-side pressure drops. There are three options:

no embossing (no increase in pressure drops),
embossed, with an increase in air pressure drops or
custom embossed, where the user can impose a certain custom percentage increase in air-side pressure drops according to their own experimental data.

Turbolator

Also at the request of our customers, we introduced the turbulator section. When the velocity of the water or fluid in the tubes is low, a turbulator, usually made of copper, in the shape of spiral or spring, can be placed inside the tube to promote turbulence and improve heat transfer. It is now possible to manage turbulators in this section, with related editable factors.