To determine the right fan impeller for a fan, the maximum installation space, the required operating point (volume flow / pressure loss of the system at medium density), drive type and material of the fan impeller are relevant. In addition, depending on the area of application, application characteristics such as temperature or corrosive media or regulating, normative specifications (e.g. ErP327/2011 or DIN EN 15085-2 in railroad technology) must be taken into account. An overview of the necessary application data for fan wheel design is provided in the Technical Questionnaire.
To overcome the flow resistances within the flow path of the conveyed volume flow
The reduction in the variety of parts, which is becoming increasingly important today, also affects the variety of fans in the design of new series of the most diverse machine systems. A good approach to reducing the variety of parts in fans can be speed control via frequency converters or EC motors. In this way, a fan wheel design with the highest possible efficiency (economic efficiency, energy savings) can be carried out over a wide operating range and at the same time with a low diversity of parts.
With a good fan selection, the operating point should always be in the range of the maximum efficiency.
For the selection of the user's optimum fan impeller concept, the engineers from punker GmbH will be pleased to provide advice. Ultimately, however, it is up to the user / plant operator to determine the priority of the boundary conditions