FanSpec

FanSpec helps to evaluate different fan specification for a given application based performance characteristics such as flow rate, static pressure, shaft power, and fan efficiency. It also determines the average duct velocity and duct pressure loss that are very critical to satisfactory performance and energy efficiency. Most manufacturers provide fan performance data in the form of fan curve (Q vs H). However, the operating point on this curve depends upon the total resistance offered by the duct system. This app helps application engineers to quickly evaluate different options available in selection and application of fans.

Fan properties:
Fans are categorized based on the type of flow. The flow can be either axial or radial by centrifugal action. The users can edit and enter key fan specification data as shown in the following screen shot.

Gas properties:
By default Air is used as gas medium and its properties are updated based on the input temperature. For gases other than air, the property data need to be entered including molecular weight.

Duct system
Users can choose any duct system based on cross section, class, size and material. Respective spinners are provided for class, size and material selection. The size of rectangular duct corresponding to the long side and short side is depends upon class and aspect ratio. The total equivalent length data includes total duct length and resistance due to different duct fittings and terminal box.

Performance summary:
A comprehensive summary is provided as shown in the screen shot that includes different performance characteristics of a fan-duct system. This would help in evaluation of different fans for a given application. A general app notes is also provided for a quick reference.