Design and Fabrication of Centrifugal Blower using Locally Sourced Materials
This paper deals with the design and fabrication of a centrifugal blower. A backwards-curved blower was employed in the study, because the backwards-inclined blower is highly efficient, operates at approximately twice the speed of a forward-curved air blower, and is suitable for high-state pressure applications. The design consideration and analysis concerned within this study is for a single-stage centrifugal blower with capacity, Q (0.317m3/min) at a pressure, P (10,000Pa), head, H (61.87m), and shaft speed, N (1450rpm). The lowest air volumetric rate of 0.073 m3s-1 was obtained at closing the inlet (85%), the impeller speed (400rpm), and the air volumetric rate (0m3s-1) at closing the inlet (100%) for all the impeller speeds. The highest air volumetric (0.379m3s-1) was obtained at closing the inlet (0%) and impeller speed (960rpm). The impeller speed of 400rpm with a static pressure value of 47.03Pa, can be computed as the pressure value at 960rpm (i.e., 40.07Pa), indicating a 17% deviation (difference of 6.96 Pa). The highest total efficiency achieved is on closing the inlet of 50% and the impeller speed of 960rpm was attained at about 9.93%, whereas the lowest total efficiency on all the impeller speeds is achieved at the closing inlet of 0%. The result shows that the centrifugal blower was efficient over a wide range of flows. The blower provides a small unit of footprints with a good turn-down capacity.
R. P. Edward, “Ventilating fans and exhaust systems,” In R. K. Mobley (ed.), Maintenance Engineering Handbook, sixth ed., McGraw-Hill, New York, 2015.
K. K. Mark, P. M. Patel, “Performance improvement of the centrifugal fan by using CFD,” International Journal of Advanced Engineering Research and Studies, vol. 2, no. 2, pp. 1-4, 2009.
N. Y. Huang, K.V. Hsiel, “Analysis of centrifugal fan for improved performance using splitter vanes,” World Academy of Science, Engineering and Technology, vol. 36, 2009.
C. Karasik, M. Carter, “Performance analysis and optimized design of backward curved airfoil centrifugal blowers,” American Society of Heating, Refrigerating and Air-Conditioning Engineers, vol. 15, no. 3, pp. 461-488, 2010.
X. Lin, Q. Huang, “Performance improvement of centrifugal fan by using CFD,” Engineering Application of Computational Fluid Mechanics, vol. 2, no. 2, pp. 130-140, 2012.
O. P. Yu, R. Khilwani, T. Sreenivasulu, M. Kannan, “Parametric study of centrifugal fan performance: Experiments and numerical simulation,” International Journal of Advances in Engineering & Technology, vol. 1, no. 2, pp.33-50, 2015.
A. T. Jeon, “Analysis of radial-flow impellers of different configurations,” The Pacific Journal of Science and Technology, vol. 13, no. 1., 2012.
Copyright (c) 2021 E. O. Aigboje, A. M. Odiamenhi
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.