Abstract
In this paper, the effect of number of blades on ceiling fan performance is discussed. This approach helps to satisfy tradeoff between high air flow (performance) and power consumption (energy efficiency). Specifically, variation from two to six blades is considered with nonlinear forward sweep profile. Reynolds Averaged Navier-Stokes (RANS) technique is used to model the flow field induced by the ceiling fan inside a generic room. The performance is gauged through response parameters namely volumetric flow rate, mass flow rate, torque and energy efficiency. The results indicate that mass and volumetric flow rates are maximized for six blade configuration and energy efficiency is maximized for two blade configuration. The study indicates the importance of tradeoff between high air flow through ceiling fan and associated energy efficiency.
Highlights
Ceiling fans are frequently used as a common household appliance in the tropical region
Response parameters to assess the effect of number of blades used in this study are volumetric flow rate, mass flow rate, torque, and energy efficiency
Volumetric flow rate is the volume of air coming down on a specified surface per unit time
Summary
Ceiling fans are frequently used as a common household appliance in the tropical region. Improvement in motor design is generally achieved through material changes that directly results in cost increase. To satisfy varying costumer requirements, an easy and cost effective solution is to vary the number of blades against the specified performance requirements. MATEC Web of Conferences research is to interpret the flow field and velocity profile of the fan blade through computational modeling and parametric study. The details of geometric descrition of room and blade profile are discussed first. The computational setup is followed by results, discussion and conclusions
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