Minimizing fan energy costs
Minimizing fan energy costs and maximizing fan efficiency is the subject of this paper. Blade design itself can cause poor flow distribution and inefficiency. A basic design criterion is that a blade should produce uniform flow over the entire plane of the fan. Also an inherent problem with the axial fan is swirl -- the tangential deflection of exit-flow caused by the effect of torque. Swirl can be prevented with an inexpensive hub component. Basic efficiency can be checked by means of the fan's performance curve. Generally, fewer blades translate into higher axial-fan efficiency. A crowded inboard area creates hub turbulence which lessens efficiency. Whether the pitch of fan blades is fixed or variable also affects energy consumption. Power savings of 50% per year or more can be realized by replacing fixed-pitch, continuously operating fans with fans whose blade pitch or speed is automatically varied.
- Research Organization:
- Hudson Products Corp., Houston, TX
- OSTI ID:
- 6131420
- Journal Information:
- Chem. Eng. (N.Y.); (United States), Journal Name: Chem. Eng. (N.Y.); (United States) Vol. 92:11; ISSN CHEEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
AERODYNAMICS
BLOWERS
CONFIGURATION
COST BENEFIT ANALYSIS
DESIGN
EFFICIENCY
ENERGY EFFICIENCY
FLUID MECHANICS
MECHANICS
OPTIMIZATION
TURBULENCE
VENTILATION SYSTEMS