International Conference on Global Trends in Engineering, Technology and Management (ICGTETM-2016)
Evaluation of Ceiling Fan Blade Angle Performance using
CFD
Sagar Sali1, Dhananjay B. Sadaphale2, Navneet K.Patil3
Department of Mechanical Engineering,
SSBT’s, College Of Engineering, and Technology, Bambhori, Jalgaon-425002 (M.S.), India
Abstract-This Analysis have been conducted to
analyse the different blade angle by Computational
Fluid Dynamics (CFD) in ANSYS software to finding
the maximum air delivery. By finding maximum air
delivery with their blade angle the optimum design is
carried out by comparison of energy consumption i.e.
power with different number of blades of ceiling fan.
The experiments were conducted based on three
different number of blades, have different blade angles,
with constant speed and blade length and
mathematical model was developed. Based on this
analysis optimum design is achieved.
Keywords—Ceiling Fan, Blade Angle, Air delivery,
CFD.
I. INTRODUCTION
The coefficient of performance (COP) of a ceiling
fan which describes the fan efficiency will be
expected to in-crease by changing the blade angle and
enhancing the pro-file of the blades. Thus, this
research aims to conduct a comparative Analysis on
the use of a newly designed ceiling fan which
incorporates special aerodynamic profile and more
efficient set of blades in comparison to the
conventional blades. By changing the angle of blade,
the power needed for operating the ceiling fan will be
decreased and they will be produce high velocity of
airflow. [7] Further, by adding an aerodynamic feature
to the existing at profile, the fan air delivery can be
increased to provide better performance.
For Analysis purpose we are changing the blade
angle and number of blades. ANSYS Software is used
to obtain graphical representation of result. It saves
time and Optimise the design.[2]
Figure 1: 3D Model of Celling Fan Blade
The Drafting is obtained by using AutoCAD
Software And calculating c/s area of blade using
software which is shown in Fig.2
Figure 2: 2D Draft Model of Celling Fan Blade
II. DESIGN OF CEILING FAN BLADE
Blades are key elements of Celling Fan. These
blades are found to be very efficient at low speed,but
at high speed it becomes necessary to study the flow
effects which affects the speed and efficiency of
Celling Fan.
A simple model of fan blade which is obtained by
modelling using SolidEDGE Software.[4] which is
Shown in Fig.1 In This model we take different CrossSections area of the blade 10%,50% and 90%.[9]
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III. AIR FLOW ANALYSIS OF CEILING FAN BLADE
Analysis of designed fan blade which taken in
ANSYS CFD Software with different blade angles and
number of blades.[7]
For CFD Analysis we take constant velocity of air
= 11.07 m/s take place.
For CFD Analysis we take three cross section 10%,
50% & 90% of blade and .
10% c/s of Blade
50% c/s of Blade
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International Conference on Global Trends in Engineering, Technology and Management (ICGTETM-2016)
90% c/s of Blade
The results air velocities of 8 0 100 110 120 and 130
of Blade angle in three C/s of Blade is Shown in
Following Figures.
Analysis of 8 Degree 10% cs of Fan Blade which is
shown in figure.3
Analysis of 10 Degree 10% cs of Fan Blade which
is shown in figure.6
Figure 6: Analysis of 10 Degree 10% cs of Blade
Figure 3: Analysis of 8 Degree 10% cs of Blade
Analysis of 10 Degree 50% cs of Fan Blade
which is shown in figure.7
Analysis of 8 Degree 50% cs of Fan Blade which is
shown in figure.4
Figure 7: Analysis of 10 Degree 50% cs of Blade
Analysis of 10 Degree 90% cs of Fan Blade which
is shown in figure.8
Figure 4: Analysis of 8 Degree 50% cs of Blade
Analysis of 8 Degree 90% cs of Fan Blade which is
shown in figure.5
Figure 8: Analysis of 10 Degree 90% cs of Blade
Similarly, analysis for 110 ,120 & 130 blade angle
take place.
Figure 5: Analysis of 8 Degree 90% cs of Blade
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International Conference on Global Trends in Engineering, Technology and Management (ICGTETM-2016)
IV. VELOCITY CALCULATIONS FROM ANALYSIS
FIGURES
A)For finding optimum blade angle
1) 8 Degree
a) 10% c/s area-5.588e+000 =5.588
b) 50% c/s area-1.116e+001 =11.16
c) 90% c/s area-1.550e+001 =15.50
Average Velocity =10.74 m/s
C) For 3 blade ceiling fan
2)10 Degree
a) 10% c/s area-5.500e+000 =5.50
b) 50% c/s area-1.104e+001 =11.40
c) 90% c/s area-1.667e+001 =16.67
Average Velocity =11.07m/s
3)11 Degree
a) 10% c/s area-5.288e+000 =5.288
b) 50% c/s area-1.093e+001 =10.93
c) 90% c/s area-1.658e+001 =16.58
Average Velocity =10.93 m/s
D) For 4 blade ceiling fan
4)12 Degree
a) 10% c/s area-5.353e+000 =5.353
b) 50% c/s area-1.076e+001 =10.76
c) 90% c/s area-1.626e+001 =16.26
Average Velocity =10.79 m/s
5)13 Degree
a) 10% c/s area-5.186e+000 =5.186
b) 50% c/s area-1.078e+001 =10.78
c) 90% c/s area-1.621e+001 =16.21
V. RESULT
Average Velocity =10.73 m/s
B)For finding optimum design at 10 degree
blade angle
ϴ =Blade angle = 100
V = Velocity of air = 11.07 m/s
N= Revolution = 200 rpm
R=Radius of circumference = 0.5 m
Angular velocity
According to kinematics equation.
We have considered the 5 different blade angles are
as shown in following table and these blade angles
represent their maximum air velocity. By these the
maximum air velocity is obtain at 10 blade angle of
ceiling fan.
Blade Angle
8
10
11
12
13
Maximum air Velocity (m/s)
10.74
11.07
10.93
10.79
10.73
Table 1: Maximum Velocities of Different Blade Angle
C) For 2 blade ceiling fan
ISSN: 2231-5381
Therefore optimum design can be obtained at 10
blade angle of ceiling fan. Hence following table
considered only 10 blade angle. The power at 2, 3, 4
no. of blades is shown in following table. Therefore
the energy consumption i.e. power is maximum by
using 4 no. of blades and velocity is also maximum.
The power and velocity is moderate by using 3 no. of
blades and the power and velocity is least by using 2
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International Conference on Global Trends in Engineering, Technology and Management (ICGTETM-2016)
no. of blades. Therefore optimum design is 3 no. of
blades ceiling fan.
No. Of Blades
2
3
4
Air Velocity (m/s)
23.14
33.21
44.28
Power (watt)
34.34
37.48
40.59
[12] H. V. Mahawadiwar, V.D. Dhopte, P.S.Thakare, Dr. R. D.
Askhedkar, ”Cfd Analysis Of Wind Tur-bine Blade” , H. V.
Mahawadiwar, V.D. Dhopte, P.S.Thakare, Dr. R. D.
Askhedkar / International Journal of Engineering Research
and Applications (IJERA),Vol. 2, Issue 3, May-Jun 2012.
[13] Masine Md. Tap, Haslinda Mohamed Kamar, Ab-dul Kadir
Marsono Nazri Kamsah and Khairul Amry Mohd
Salimin, ”Simulation of Thermal Comfort of a Residential
House” , IJCSI International Journal of Computer Science
Issues, Vol. 8, Issue 5, No 2, September 2011.
Table 2: Power consumption of Number of blades
Therefore, from tables 2 the 3 number of blades
ceiling fan is optimum design by using 10 blade angle.
VI. CONCLUSION
As we have studied about CFD analysis of ceiling
fan. By these we conclude that the maximum air
velocity is obtain at 100 blade angle.
Also the power consumption and air velocity is
optimum at 3 no. of blades of ceiling fan. So we can
conclude that 3 numbers of blades of ceiling fan is
optimum design.
REFERENCES
[1]
Power
Consumption
of
Ceiling
Fan,
http://www.hunterfan.co.uk/blog/dc-vs-ac-ceiling-fans/
[2] Experimental analysis of Power consumption in ceiling fans,
http://www.ijrmet.com/vol4issue2/darshan-satpute
[3] Gromicko, Nick.,”Ceiling Fan Inspection”, International
Association of Certified Home Inspectors. Retrieved May 31,
2013.
[4] Lessons from the Technical Analysis of Ceiling Fans, SEAD
International Energy Studies Group Lawrence Berkeley
National Laboratory
[5] Areas
for
Application
of
FEA,
http://www.figes.com.tr/english/ansys/ansys.php
[6] T.M.I. Mahlia, H. Moradalizadeh, M.N.M. Zubir, T.
Olofsson, ”Theoretical and Experimental Investigation of
Energy Efficiency Improvement of the Ceiling Fan by Using
Aerodynamic Blade Profile”. University Tenaga National,
2011.
[7] Y. Momoi, K. Sagara, T. Yamanaka and H.
Kotani,”Modelling of Ceiling Fan Based on Velocity
Measurement for CFD Simulation of Airflow in Large
Room”.Osaka University, Graduate School of Eng., Dept. of
Architectural Eng., 21 Yamadaoka, Suita, Osaka, Japanl, May
2009.
[8] Santosh Kumar Dahare , Dr. Rohit Rajvaidya , ”Design and
Analysis of Nylon66 Ceiling Fan Blade Using Finite Element
Method”, International Research Journal of Engineering &
Applied Sciences., 2013.
[9] Mahajan Vandana N., Shekhawat Sanjay P. , ”ANALYSIS OF
BLADES
OF
AXIAL
FLOW
FAN
USING
ANSYS.”,Department of Mechanical Engg. S.S.B.T’s College
of Engg. And Technology, Bambhori, Jalgaon, International
Journal of Advanced Engineering Technology, E-ISSN 09763945, IJAET/Vol.II/Issue II/April-June, 2011/261-270.
[10] Tanay Parekh, Divyam Joshi, Niket Vasavada, Vishal
Fegade, ”Techno Economic Analysis Of Remanufacturing For
Low Ceiling Cabin Fan” , INTERNATIONAL JOURNAL OF
SCIENTIFIC & TECH-NOLOGY RESEARCH VOLUME 3,
ISSUE 5, May 2014.
[11] M. Joseph Stalin, S. Mathana Krishnan, P. Barath, Member,
IAENG , ”Cooling of Room with Ceiling Fan Using Phase
Change Materials” , Proceedings of the World Congress on
Engineering 2013 Vol III.
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