Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4925948 | Renewable Energy | 2018 | 31 Pages |
Abstract
To achieve this target, a centrifugal fan equipped with a diffuser and volute with variable cross-sectional area is developed based on numerical simulations (CFD), laser-optical flow measurements (PIV) and performance measurements of the centrifugal fan. The geometrical variability is achieved by a movable backplate of the diffuser and the volute. The variable cross-sectional area of the diffuser and volute allows maintaining high efficiencies and pressure ratios for operating points at off-design. A small diffuser width is suitable for low mass flow rates, and a large diffuser width for high mass flow rates. Thus, efficiency of the centrifugal fan can be increased at part-load operation by up to 7.1% points by appropriately adjusting the diffuser width. As a result the parasitic power consumption of the air supply system is reduced and hence the overall efficiency of the fuel cell system increases.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Sebastian Burgmann, Tore Fischer, Manuel Rudersdorf, Alexander Roos, Angelika Heinzel, Jörg Seume,