Fan Fundamentals and Fan Efficiency - PowerPoint PPT Presentation

Loading...

PPT – Fan Fundamentals and Fan Efficiency PowerPoint presentation | free to download - id: 11a426-YTU1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Fan Fundamentals and Fan Efficiency

Description:

Fan Fundamentals and Fan Efficiency – PowerPoint PPT presentation

Number of Views:700
Avg rating:3.0/5.0
Slides: 168
Provided by: davidma51
Learn more at: http://www.mpw.org
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Fan Fundamentals and Fan Efficiency


1
Fan Fundamentals and Fan Efficiency
  • By
  • The New York Blower Company

2
CFM
3
SP
4
RPM
5
BHP
6
(No Transcript)
7
(No Transcript)
8
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM
  • SP
  • RPM 2,000
  • BHP

9
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM 20,000
  • SP
  • RPM 2,000
  • BHP

10
2
(
)
RPMnew RPMold

11
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM 20,000
  • SP
  • RPM 2,000
  • BHP

12
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM 20,000
  • SP 4
  • RPM 2,000
  • BHP

13
3
(
)
RPMnew RPMold

14
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM 20,000
  • SP 4
  • RPM 2,000
  • BHP

15
  • CFM 10,000
  • SP 1
  • RPM 1,000
  • BHP 10
  • CFM 20,000
  • SP 4
  • RPM 2,000
  • BHP 80

16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
Fan System Curves
20
Fan Curves
  • Fan curves are used to graphically represent fan
    performance

21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
System Curves
  • System curves are used to graphically represent
    system flow and pressure
  • Like fans, systems also follow the fan laws

29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
Fan Dampers
  • Outlet Dampers
  • Inlet Dampers
  • Variable Frequency Drives

33
Fan Outlet Dampers
  • Parallel Blade
  • Opposed Blade

34
Fan Outlet Damper                              
                                                  
              
35
Fan Outlet Damper                              
                                                  
              
36
Fan Outlet Damper                              
                                                  
                                         
37
Fan Outlet Damper                              
                                                  
                                                  
                                 Static
pressure and brake horsepower curves for
backwardly-inclined fan with outlet damper. As
the damper closes, the point of operation - brake
horsepower and static pressure moves to the left
of the original fan selection point to the 90
degrees (wide open) damper setting.
38
Fan System Curves                            
                                                  
                    
39
Fan Inlet Dampers
  • Internal
  • External
  • Inlet Box

40
(No Transcript)
41
(No Transcript)
42
(No Transcript)
43
Fan Inlet Vane Damper                          
                                                  
                                 
44
(No Transcript)
45
Fan Inlet Box Damper                           
                                                  
                                                  
                  
46
Fan Inlet Vane Damper                          
                                                  
                                                  
                                          
Effect of applying inlet dampers to the
fan. Separate SP and BHP curves are developed for
each vane setting. Fan operating points at these
settings are determined by system resistance
points where system curve intersects SP and BHP
fan curves.
47
VFD Fan Curves                       
                                                  
        
48
VFD Fan Curves                       
                                                  
        
49
(No Transcript)
50
Fan Control - Outlet Damper
51
Fan Control - Inlet Box Damper
52
Fan Control - VIV Damper
53
VFD Fan Curves                       
                                                  
        
54
Fans Operating on a VFD
55
Fans Operating on VFD
  • Motor/Drive Types
  • Variable Torque
  • Constant Torque
  • Constant Horsepower

56
Fans Operating on VFD
  • Variable Torque
  • Speed torque characteristic that varies as the
    square of the change in speed.
  • Example An AC Motor rated for 10 HP at 1800 RPM
    will produce 2-1/2 HP at 900 RPM
  • Typical applications
  • Centrifugal fans, pumps, blowers

57
Fans Operating on VFD
  • Constant Torque
  • These motors develop the same torque at each
    speed…thus the power output varies directly with
    speed.
  • Example An AC Motor rated for 10 HP at 1800 RPM
    will produce 5 HP at 900 RPM
  • Typical applications
  • Mixers, conveyors, compressors

58
Fans Operating on VFD
  • Constant Horsepower
  • These motors develop the same horsepower at each
    speed…torque is inversely proportional to the
    speed
  • Example An AC Motor rated for 10 HP at 1800 RPM
    will produce 10 HP at 900 RPM
  • Typical application
  • Machine tools (drills, lathes, milling machines)

59
Fans Operating on VFD
  • Constant Horsepower
  • These motors develop the same horsepower at each
    speed…torque is inversely proportional to the
    speed
  • Example An AC Motor rated for 10 HP at 1800 RPM
    will produce 10 HP at 900 RPM
  • Typical application
  • Machine tools (drills, lathes, milling machines)

60
Fans Operating on VFD
61
RADIAL
62
(No Transcript)
63
(No Transcript)
64
(No Transcript)
65
(No Transcript)
66
(No Transcript)
67
(No Transcript)
68
(No Transcript)
69
(No Transcript)
70
(No Transcript)
71
(No Transcript)
72
(No Transcript)
73
(No Transcript)
74
(No Transcript)
75
BACKWARD INCLINED
76
(No Transcript)
77
(No Transcript)
78
(No Transcript)
79
(No Transcript)
80
(No Transcript)
81
(No Transcript)
82
(No Transcript)
83
(No Transcript)
84
(No Transcript)
85
(No Transcript)
86
(No Transcript)
87
(No Transcript)
88
(No Transcript)
89
(No Transcript)
90
(No Transcript)
91
(No Transcript)
92
AXIAL
93
(No Transcript)
94
(No Transcript)
95
(No Transcript)
96
(No Transcript)
97
(No Transcript)
98
(No Transcript)
99
(No Transcript)
100
FORWARD CURVE
101
(No Transcript)
102
(No Transcript)
103
(No Transcript)
104
(No Transcript)
105
(No Transcript)
106
(No Transcript)
107
RADIAL TIP
108
(No Transcript)
109
(No Transcript)
110
(No Transcript)
111
15,000 cfm, 10 in wg sp, 0.10 kw/hr
112
(No Transcript)
113
(No Transcript)
114
(No Transcript)
115
Key Point
  • At a fixed speed,
  • A fan is a constant volume machine, but
  • The static pressure delivery varies with
    airstream density, and
  • The horsepower consumption also varies with
    airstream density

116
(No Transcript)
117
(No Transcript)
118
SYSTEM EFFECT
119
(No Transcript)
120
(No Transcript)
121
Inlet Effects                                  
                                                  
                                                  
     
122
Inlet Effects                                   
                                                  
                                                  
    
123
Inlet Effects                                   
                                                  
                                                  
                                                  
                       
124
Inlet Effects                                   
                                                  
                                                  
    
125
Inlet Effects                                  
                                                  
                                                  
     
126
Inlet Effects                                   
                                                  
                                    
127
Inlet Effects                                  
                                                  
                    
128
Inlet Effects                                  
                                                  
                                                  
     
129
Inlet Effects                                   
                                                  
                                    
130
Outlet Effects                                  
                                                  
                                     
131
(No Transcript)
132
Outlet Effects                                  
                                                  
                                                  
     
133
(No Transcript)
134
(No Transcript)
135
(No Transcript)
136
(No Transcript)
137
(No Transcript)
138
(No Transcript)
139
(No Transcript)
140
(No Transcript)
141
(No Transcript)
142
(No Transcript)
143
(No Transcript)
144
(No Transcript)
145
(No Transcript)
146
(No Transcript)
147
(No Transcript)
148
(No Transcript)
149
(No Transcript)
150
(No Transcript)
151
(No Transcript)
152
(No Transcript)
153
(No Transcript)
154
Accessories
155
Inlet Silencer, No Loss Stack
156
Silencers
157
Fan Enclosure
158
Cladding - Blanket
159
Cladding
160
Gas Barrier Shaft Seal
161
Double Lip Shaft Seal
162
Wheel Backpressure Blades
163
Wheel Backpressure Blades
164
Alternate Materials
165
Magnetic Coupling
166
(No Transcript)
167
(No Transcript)
About PowerShow.com