ENERGY EFFICIENCY IN ELECTRIC MOTORS HIGH ENERGY EFFICIENCY SYSTEMS IN ELECTRIC MOTORS

Transcripción

1 ENERGY EFFICIENCY IN ELECTRIC MOTORS HIGH ENERGY EFFICIENCY SYSTEMS IN ELECTRIC MOTORS 25 November of 2011

2 Index 1 Introduction 2 Savind and EE in Motors a) EU MEPS Schemes b) Efficient motors 3 Variable Speed Drives 4 Power Electronics WorldWide

3 01. Introduction Global energy distribution Source: International Energy Agency

4 01. Introduction Global energy distribution Source: International Energy Agency

5 01. Introduction Global energy distribution Source: International Energy Agency Source: Comisión Nacional de la Energía (CNE)

6 01. Introduction Industrial Sector Consumption and Applications. Pumps 15% 8% 32% Fans Conveyor belts 14% 8% 23% Compressors Mills Dryers Propulsion Winders Lamination Perforation Others.

7 01. Introduction Tertiary Sector Consumption and Applications. ACS pumps Heating pumps Cooling towers fans Air treatment unit Heat pumps compressor Elevators Escalators Hoods Compressors Others.

8 Index 1 Introduction 2 Saving and EE in Motors a) EU MEPS schemes b) Efficient motors 3 Variable Speed Drives 4 Power Electronics WorldWide

9 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

10 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

11 02. Saving and energy efficiency in motors Efficient Motors 2 % Performance Fuente: ABB

12 Index 1 Introduction 2 Saving and EE in Motors a) EU MEPS Scheme b) Efficient Motors 3 Variable Speed Drives 4 Power Electronics WorldWide

13 03 Variable Speed Drives. Pumps and fans

14 03 Variable Speed Drives. Pumps and fans - Similarity laws PUMPS AND FANS ACCORDING TO SIMILARITY LAWS Q n h n 2 P n 3 Donde: Q = Flow n = Motor Speed P = Power h = Height P 80n = P 100n 80n 100n 3

15 03 Variable Speed Drives. Pumps and fans Valve control vs VSD P = kW 40 3 P40 = P50 = 51. 2kW P35 P = 50 = 34.3kW Height in m H 2 O n = 1480 RPM 80 Height in m H 2 O 70 1 X n CAUDAL 70 1 X n X n 0.8 X n 0.7 X n 0.6 X n Static height 20 meters 100% 90% 60% 50% 80% 70% X n 0.8 X n 0.7 X n 0.6 X n X n 0.4 X n X n 0.4 X n 10 H-Q curves Q Flow H-Q Curves 50% 100% m 3 /min System curves % 100%

16 03 Variable Speed Drives. Pumps and fans Energy saving Flow (%) Valve control demand ( kw) Demand with SD700 VFD (kw) Demand saving (kw) Energy saving (%) Cost saving ( /1000 h) 100% % 95 72,9 22,1 23 % % 83 51,2 31,8 38 % % 77 34,3 42,7 55 % % 73 21,6 51,4 70 % % 68 12,5 55,5 81 % Pump Power : 110 kw Electric cost: 150 /MWh

17 03 Variable Speed Drives. Conveyor belts, compressor, mills, others

18 03 Variable Speed Drives. Conveyor belts, compressor, mills, others T cnst. P n Where: T = Torque n = Motor speed P = Power P ( kw) N ( rpm) Speed (%) Demand with SD700 VFD (kw) Energy saving (%) Cost saving ( /1000 h) 100% % % % % % % % % % % Pump power : 110 kw Electric cost: 150 /MWh

19 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.

20 Index 1 Introduction 2 Saving and EE in Motors 3 EU MEPS Schemes a) Efficient Motors 3 Variable Speed Drives 4 Power Electronics WorldWide

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