Fläktkurvorna

Fläktkurvorna, a Swedish term translating to "fan curves," are graphical representations used to depict the performance characteristics of a fan. These curves illustrate the relationship between various operational parameters of a fan, most commonly airflow and static pressure, at a given rotational speed.

The primary curves typically found on a fan curve are the fan performance curve and the system curve. The fan performance curve shows how much air a fan can move (airflow, usually in cubic feet per minute or cubic meters per hour) against the resistance it encounters (static pressure, often in inches of water gauge or Pascals). This curve is unique to each specific fan model and its operating speed. Different curves are usually plotted for various fan speeds, indicating that a fan's capacity increases with higher rotational speeds.

The system curve, on the other hand, represents the resistance to airflow within a specific ventilation system. It shows how static pressure increases as airflow increases due to friction and other resistances in ducts, filters, and other components. This curve is dependent on the ductwork design, the presence of any filters, and the overall layout of the system.

The intersection point of the fan performance curve and the system curve is known as the operating point. This point signifies the actual airflow and static pressure that will be achieved when a particular fan is installed in a specific system and operated at a certain speed. Engineers and HVAC professionals use fläktkurvorna to select the appropriate fan for a given application, ensuring that the fan can deliver the required airflow against the system's resistance efficiently. They are crucial for optimizing energy consumption and ensuring proper ventilation.