ABSTRACT

In recent times, most of the household appliances are using electric power and as such, electricity shortage has become a major problem throughout the world. Ceiling fan is one of such appliances that consume electric power. The best way to minimize the power consumption of the ceiling fan is to reduce the weight of the ceiling fan blade. Thus, this project work entails the design of a new ceiling fan blade in which case the weight and power consumption was compared to the Panasonic model ceiling fan blade. The new ceiling fan blade was designed and fabricated and when compared to the conventional blade, it saves 35% power consumption and weight reduction of 28%.

LIST OF SYMBOLS

M=             Mass

ω=             Angular velocity

r=               Radius

T=              Torque

r.p.m=        Revolution per minute

 l=               Length

W=             Watt

K=              Radius of gyration

m=             Metre

s=               Second

N=              Newton

COP=         Coefficient of performance

µ=               Viscosity

b=                Base

h=                Height

A=                Area

C=                Speed of sound

Re=               Reynolds number

Ma=             Mach number

Kg=              Kilogram

I=                 Moment of inertia

LIST OF FIGURES

Fig.2.1:      Different types of ceiling fan blade     

Fig.2.2:      A typical ceiling fan with Aluminum ceiling fan blades

Fig.3.5.1:   Mechanical drawing of the Aluminum airfoil of chord 90mm

Fig.3.5.2:   Mechanical drawing of the Aluminum airfoil of chord 170mm

Fig.3.5.3:   Mechanical drawing of the Aluminum sheet with dimensions

Fig.3.5.4:   Mechanical drawing of the fabricated ceiling fan blade with dimensions

LIST OF TABLES

Table 4.3.1:       Values of the parameters of the newly designed fan blade

Table 4.3.2:      Value of the parameters of the Panasonic model conventional blade