®
ENERGY EFFICIENCY IN ELECTRIC MOTORS
HIGH ENERGY EFFICIENCY SYSTEMS
IN ELECTRIC MOTORS
25 November of 2011
© 2011 Power Electronics. Todos los derechos reservados.
Index
®
1 Introduction
2 Savind and EE in Motors
a) EU MEPS Schemes
b) Efficient motors
3 Variable Speed Drives
4 Power Electronics WorldWide
© 2011 Power Electronics. Todos los derechos reservados.
01. Introduction
Global energy distribution
®
Source: International Energy Agency
© 2011 Power Electronics. Todos los derechos reservados.
01. Introduction
Global energy distribution
®
Source: International Energy Agency
© 2011 Power Electronics. Todos los derechos reservados.
01. Introduction
Global energy distribution
®
Source: International Energy Agency
Source: Comisión Nacional de la Energía (CNE)
© 2011 Power Electronics. Todos los derechos reservados.
01. Introduction
Industrial Sector – Consumption and Applications.
 Pumps
8%
15%
32%
 Fans
 Conveyor belts
 Compressors
14%
8%
23%
 Mills
 Dryers
 Propulsion
 Winders
 Lamination
 Perforation
 Others….
© 2011 Power Electronics. Todos los derechos reservados.
®
01. Introduction
Tertiary Sector – Consumption and Applications.
 ACS pumps
 Elevators
 Heating pumps
 Escalators
 Cooling towers fans
 Hoods
 Air treatment unit
 Compressors
 Heat pumps compressor
 Others….
© 2011 Power Electronics. Todos los derechos reservados.
®
Index
®
1 Introduction
2 Saving and EE in Motors
a) EU MEPS schemes
b) Efficient motors
3 Variable Speed Drives
4 Power Electronics WorldWide
© 2011 Power Electronics. Todos los derechos reservados.
02. Saving and energy efficiency in motors
EU MEPS (European Minimum Energy Performance Standard)
®
The European Commission decides to apply the requirements ECO DESIGN to 3 PHASE
MOTORS of 2-, 4- and 6-poles, from 0.75 to 375 kW
PHASE 1: All the MOTORS sold must present an efficiency level IE2
PHASE 2: MOTORS 7.5kW - 375kW sold must present an
efficiency level IE3 or IE2 with VARIABLE SPEED DRIVE
PHASE 3:
MOTORS 0.75kW - 375kW sold must
present an efficiency level IE3 or IE2
with VARIABLE SPEED DRIVE
2010
2011
2012
© 2011 Power Electronics. Todos los derechos reservados.
2013
2014
2015
2016
2017
2018
Index
®
10
1 Introduction
2 Saving and EE in Motors
3 EU MEPS schemes
a) Efficient Motors
3 Variable Speed Drives
4 Power Electronics WorldWide
© 2011 Power Electronics. Todos los derechos reservados.
02. Saving and energy efficiency in motors
Efficient Motors
®
▲ 2 % Performance
Fuente: ABB
© 2011 Power Electronics. Todos los derechos reservados.
Index
®
1 Introduction
2 Saving and EE in Motors
a) EU MEPS Scheme
b) Efficient Motors
3 Variable Speed Drives
4 Power Electronics WorldWide
© 2011 Power Electronics. Todos los derechos reservados.
03 Variable Speed Drives.
Pumps and fans
© 2011 Power Electronics. Todos los derechos reservados.
®
03 Variable Speed Drives.
Pumps and fans - Similarity laws
®
PUMPS AND FANS ACCORDING TO SIMILARITY LAWS
Qn
h 
Donde: Q = Flow
n = Motor Speed
n2
P = Power
P  n3
h = Height
P80 n
© 2011 Power Electronics. Todos los derechos reservados.
 80n 
 P100 n  

 100n 
3
03 Variable Speed Drives.
Pumps and fans – Valve control vs VSD
P50  100kW
80
®
P40
n = 1480 RPM
Height in m H2O
3
3
 35 
P35  P50  
  34.3kW
50


 40 
 P50  
  51.2kW
 50 
80
Height in m H2O
1Xn
1Xn
70
50
40
30
0.9 X n
Static height 20 meters
60
0.8 X n
0.7 X n
0.6 X n
CAUDAL
70
80%
100%
70%
50%
60%
90%
60
50
40
30
0.5 X n
0.8 X n
0.7 X n
0.6 X n
0.5 X n
20
20
0.4 X n
0.4 X n
H-Q
curves
10
0
0.9 X n
10
20
H-Q Curves 50%
System curves
© 2011 Power Electronics. Todos los derechos reservados.
30
100%
10
Q Flow
m3/min
0
10
50%
20
100%
30
03 Variable Speed Drives.
Pumps and fans – Energy saving
®
Demand with
Valve control
SD700 VFD
demand ( kW)
(kW)
Flow
(%)
Demand
saving
(kW)
Energy
saving
(%)
Cost
saving
(€/1000 h)
100%
100
100
-
-
-
90%
95
72,9
22,1
23 %
€ 3.315
80%
83
51,2
31,8
38 %
€ 4.770
70%
77
34,3
42,7
55 %
€ 6.405
60%
73
21,6
51,4
70 %
€ 7.710
50%
68
12,5
55,5
81 %
€ 8.325
 Pump Power : 110 kW
© 2011 Power Electronics. Todos los derechos reservados.
 Electric cost: 150 €/MWh
03 Variable Speed Drives.
Conveyor belts, compressor, mills, others
© 2011 Power Electronics. Todos los derechos reservados.
®
03 Variable Speed Drives.
Conveyor belts, compressor, mills, others
®
Where: T = Torque
T  cnst.
n = Motor speed
Pn
P = Power
P ( kW)
Speed
(%)
Demand with
SD700 VFD
(kW)
Energy
saving
(%)
Cost
saving
(€/1000 h)
100%
100
-
-
90%
90
10 %
€ 1.500
80%
80
20 %
€ 3.000
70%
70
30 %
€ 4.500
60%
60
40 %
€ 6.000
50%
50
50 %
€ 7.500
100
50
1.000
2.000
N ( rpm)
 Pump power : 110 kW
© 2011 Power Electronics. Todos los derechos reservados.
 Electric cost: 150 €/MWh
03 Variable Speed Drives.
Benefits
 ENERGY SAVINGS: up to 60% in comparison with
traditional DOL control systems
 QUALITY AND PERFORMANCE IMPROVEMENT:
Introducing a torque and a speed motor control, the
damages in the process disappear and the process
performance increase.
 REDUCE MAINTENANCE AND INCREASE
MOTOR LIFE TIME : The high number of starts and
the overcurrent suffered by induction motors reduce
its working life and increases their maintenance
costs.
 DECREASE THE ENVIRONMENTAL IMPACT AND
IMPROVE THE CORPORATIVE IMAGE: The electric
and fossil fuels energy savings reduces the company
greenhouse gases emission.
© 2011 Power Electronics. Todos los derechos reservados.
®
Index
®
1 Introduction
2 Saving and EE in Motors
3 EU MEPS Schemes
a) Efficient Motors
3 Variable Speed Drives
4 Power Electronics WorldWide
© 2011 Power Electronics. Todos los derechos reservados.
04 Power Electronics Worldwide
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