Performance of mixed flow multiblade fan as small duct fan (comparison with other types of fan)

摘要

There are many advantages to using a duct of small diameter (φ100) and a duct fan of small scale in an air conditioning system. In this study, the performances of five kinds of fan impeller, that is, axial flow fan, mixed flow fan, centrifugal multibade fan impellers and mixed flow multiblade fan impeller were examined experimentally to determine the optimum type of duct fan impeller. The centrifugal fan and multiblade fan were scroll-less, because fans were built completely in a duct in order to make air flow in and out in an axial direction.