What is ISO/TR 16219 about?
ISO/TR 16219 discusses fans. A fan is a powered machine used to create a flow of air. ISO/TR 16219 deals with the likely degradation of air performance of fans tested in standardized airways in accordance with ISO 5801 when compared with the performance of fans tested under actual site conditions. ISO/TR 16219 deals with the performance of several generic types of fans and fittings. The results given are intended as guidelines and only provide trends, as the system effect depends on the exact geometry of the fan and disturbing component.
The test data presented in ISO/TR 16219 are taken from an extensive experimental program conducted 20 years ago by NEL (National Engineering Laboratory, UK), mainly on axial and centrifugal fans. Data are also taken from several research projects financially supported by ASHRAE, some of them being carried out in the AMCA laboratory in Chicago, as well as from results published previously by individual fan manufacturers.
Who is ISO/TR 16219 for?
ISO/TR 16219 on the fan is useful for:
- Fan manufacturing industries
- Design engineers
- Quality control personnel
- Research and development facilities
Why should you use ISO/TR 16219?
Fans produce air flows with high volume and low pressure (although higher than ambient pressure), as opposed to compressors which produce high pressures at a comparatively low volume. ISO/TR 16219 provides the information for accurately measuring the performance of fans when tested under standardised laboratory conditions. The ducting where specified ensures a fully developed symmetrical velocity profile at the fan inlet. There may also be sufficient straight ducting at the fan outlet to ensure efficient conversion of the distorted velocity profile at the fan outlet to a measurable stable and homogeneous profile at the measuring station.
ISO/TR 16219 shows how fan performance is affected by both inlet and outlet connections to it. System designers must not only look at the ideal performance curve and calculate system pressure drop but also consider the losses at the entry and exit points of the fan. These are described in ISO/TR 16219.
The concept of the system effect factor (SEF) was introduced to the fan industry by AMCA in 1973. Since its inception, it has become widely accepted worldwide. In more recent years it has been realized that the SEF depends not only on the fan type and the fitting geometry but also on the fan design and manufacturing. Using ISO/TR 16219 you can understand the performance of several generic types of fans and fittings.