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Energy Efficiency Services Limited (EESL), India
Creating an Energy Efficient World
Energy Efficiency Services Limited
India
Energy Efficiency Services Limited (EESL) – Who We Are
A public Energy Service Company (ESCO) under Ministry of Power
Established in the year 2009
100% share holding with Public Sector Enterprises
Board of Directors represented by Ministry of Power and Bureau of Energy Efficiency (BEE)
• NTPC Limited (India’s Largest Power Generating
Company | Market Cap as on 1st March 2016 – US
$15.5 billion)
• Rural Electrification Corporation Limited (Market
Cap as on 1st March 2016 – US $2.4 billion)
• Power Finance Corporation Limited (Market Cap as
on 1st March 2016 – US $3.1 billion
• Power Grid Corporation of India Limited (India’s
Largest Power Transmission Company | Market Cap
as on 1st March 2016 – US $10.7 billion
EESL is a joint venture company of four Public Sector Enterprises of Ministry of Power, Govt. of India
What we do
Implement energy efficiency projects for Central and Provincial Governments and other Organizations
Implement Demand Side Measures with an objective of ‘Market Transformation in Energy
Efficiency’ :
• Domestic
• Municipalities
• Agriculture
• Buildings
• Industry
Presentation Structure
• Why High efficient Motors and motor systems approach
• Standards – Global & Indian standards
• Motor Audit Approach & Analysis Tool
• Motor replacement project
• Motors Data collection format
Sector wise Electrical Energy Consumption
70% of Energy consumption by
Motors
Energy handled by Motors is 10% Energy handled by
Motors is 20%
Energy handled by Motors is 3%
100 in
30 out System
efficiency is 30%
Motor Driven Systems
Life cycle cost
Induction motors account for >100 times their first purchase cost during their life time
Therefore , Negotiate the life cycle cost
Stray Load
(Wl) losses
Core (Wc)
Losses
Rotor I²R
(Wr)
Losses
Stator I²R
(Ws) Losses
Friction and
Windage
(Wfw) losses
Loss distribution of a Typical Induction Motor
2 pole
average
4 pole
average
in Stator - WCuS 26% 34%
in Rotor - WCuR 19% 21%
Hysteresis Loss
Eddy Current
Loss
Frictional
Losses WFr
Windage Losses
- WWind
Losses due to
asymmetrcal
and leakage
fluxes
Stray load
losses (Wl) 11% 14%
19% 21%
Mechanical
Losses25% 10%
Losses
Losses in
Electrical
Components
Losses in
Magnetic
Components
Core losses
(WFe)
Losses in
Mechanical
Components
I²R losses
10
Standards scenario – Global (Before Harmonization, 2008)
• Legislation • Three-phase induction motors • 0.75 to 150kW • 60Hz • 2, 4, and 6 pole • Specifies minimum efficiencies • Testing to IEEE-112b
• Voluntary • Three-phase induction motors • 1.1 to 90kW • 50 Hz • 2 and 4 pole • Efficiency labelling
• Testing to IEC60034-2
EPACT CEMEP Agreement
Global scenario
Efficiency Levels Efficiency Classes Testing Standard Performance Standard
IEC 60034-30 IEC 60034-2-1 Mandatory MEPS
Global 2008
incl. stray load losses
2007 Policy Goal
Premium Efficiency IE3 Low Uncertainty USA 2011
Canada 2011Europe* 2015 (>7.5 kW), 2017
High Efficiency IE2 USA
Canada
Mexico
Australia
New Zealand
Korea
Brazil
China 2011
Switzerland 2011Europe 2011
Standard Efficiency IE1 Medium Uncertainty China
Brazil
Costa Rica
Israel
TaiwanSwitzerland
bold means in effect
*) IE3 or IE2+VSD
IS12615: 2004 IS12615: 2011
• 1st revision of IS:12615-1989
• Extends the range of motors
(covers 2P and 4P motors from
0.37kW – 160kW,
6P motors from 0.37 – 132kW
and 8P motors from 0.37 – 110
kW)
•Efficiency Levels – Eff1 & Eff2
(IEC60034-30)
•Test Method - 60034-2
• 2nd revision of IS:12615-1989
• Extends the range of motors (covers 2P,4P
and 6P motors from 0.37kW – 375kW)
•Test Method: IEC 60034-2-1 (IS15999:2011)
• Efficiency Levels – IE2 & IE3
(IEC60034-30:2008)
• MEPS - IE2
• Additional parameters like breakaway
torque, current & Full load speed & Full load
current are included.
IS12615: MEPS
shall be IE3 by
Jan 2014
IS12615 - Past & Present
Can anybody now offer Eff2 & Eff1 motors???
... the question to be asked .... as per which Indian or international standard ?
CR
MO
TOR
IE4 CR Motor
IE1
IE2
IE3
IEC
Co
mm
erc
ial M
oto
r Te
chn
olo
gy
for
IE4
IE3
IE4
M
oto
r Te
chn
olo
gy C
han
ges
Latest Developments in Indian Standards on Motors
IEC 60034-30-1: 2014
• IS325 is withdrawn & has
adopted IS/IEC60034-1
• For all S1 duty motors
IS12615 is adopted i.e.
IE2, IE3
IS12615:2011
IS325
Eff
icie
ncy
[%
]
IE2 New determination
Stray load losses, lump sum 0,5% of input power
96,0%
Former determination
Stray load losses,
individually measured
IEC 60034-2-1 IEC 60034-2
95,5%
The efficiency
values decline, but
the motor stays the
same
physically!
Efficiency comparison (Concept of Stray Load Loss)
• Example: 250 kW, 4-pole, 50 Hz
Other losses…
Revised motor efficiency with Stray loss loader as per IEC: 60034-2-1
Rated kW Name plate
efficiency (%) Stary loss at 0.5% (kW)
Total loss (kW)
New stray loss SLL
Revised stray loss (kW)
Revised total loss (kW)
Revised Efficiency %
7.5 87 0.0375 1.121 2.20% 0.165 1.248 85.73
Estimated energy saving with new IE3 motors
Rated power
kW
Old Efficiency
New Efficiency
Load factor
%
Energy saved- kWh
No of hours/
year
Annual saving
in energy
KwH
Tariff/ unit
Annual saving in INR
7.5 85.73 90.4 0.75 0.34 7500 2541 6 15246
Efficiency Correction & Estimated savings
How to calculate the savings from reduction in input power ?
The formula for calculating the savings in terms of units/hour is
Rated output x Load Factor x 1 1
old Eff new eff
Example 15 x 75% x (1/0.89 - 1/0.925) = 0.85 Units/hour
Annual savings0.85 x 24 hours x 360 days x Rs.3.50 = Rs25704/-
On-site efficiency testing
Decision Tool- Retrofit, replacement, continuous condition monitoring….
Motor Audit Approach & Analysis Tool
Proposed Motor replacement Model
IE3 motors Implementation
Upfront Payment / EMI payment
Key features:
Open to all: Any unit (new/existing) which is an industry
Minimum initial investment for adoption of HEM
Number of motors aggregated as per ratings from the industry units or from group of industries
EESL aggregates the motors and procurement of motors and will distribute the motors to industrial units.
The options available for industrial units for upfront payments or EMI payments
Motor systems approach
Loan
fro
m F
inan
cial
In
stit
uti
on
Loan
Re
pay
me
nt
Manufacturers/ Supplier
Industrial Unit Or
Group of Industries
Motors Data for aggregation
Motor Replacement Project
Format for Details of motors for the purpose of identification of replacement by Energy Efficient Motors(IE3)
S.No Application Population Ratings (kW)
No of Poles
(2/4/6)
Name plate
Efficiency (%)
Mounting
(Foot/ Flange)
Annual Operati
ng hours
Year of Mfg
Age of the
Motor (Years)
Make Number of
Rewindings during
last 7 years
Load point (KW)
during 60-70% of the year
Willing to replace with IE3 Motor
(Yes/No)
Preferred Payback period in
Years (2/3/4)
1. 2.
Private & Confidential © Edelman India Pvt. Ltd.
Contact Us:
Energy Efficiency Services Limited (A Joint Venture of PSUs of Ministry of Power, Govt. of India)
A-13, IWAI Building, 4th Floor, Sector - 1
Noida – 201301, Uttar Pradesh, India
K N Hemanth Kumar Manager (Technical)
Email: [email protected]
Website: www.eeslindia.org
Phone: +91 120 490 8000 (Ext 744)
Fax: +91 120 4908099
Thank You
Energy saving Calcuations
Revised motor efficiency with Stray loss loader as per IEC: 60034-2-1
AREA LOCATION Rated kW
Full
load
curent
speed Make
Name
plate
efficienc
y (%)
Stary
loss at
0.5%
(kW) of
Output
Total
loss
(kW)
New
stray
loss
SLL
Revised
stray
loss on
Input
(kW)
Revis
ed
total
loss
(kW)
Revised
Efficienc
y % as
per SLL
Curve
3.7 7.2 2850 83 0.0185 0.758 2.30% 0.103 0.842 81.46
3.7 7.3 2830 80 0.0185 0.925 2.30% 0.106 1.013 78.51
Estimated energy saving with new IE3 motors
Rated
power
kW
Old
Efficienc
y
Efficiency
- IE 3 as
per
IS12615
2011
Load
factor
Energy
saved-
kWh
No of
days per
annum
No of
hours/
year with
24 hrs
opn
Annual
saving in
energy
KwH
Tariff/
unit
Annual
saving in
INR
Approx
Cost of
the
Motor
payback
Period
3.7 81.46 87.8 0.75 0.25 250 6000 1475 7 10324 15000 1.452959
3.7 78.51 87.8 0.75 0.37 170 4080 1526 7 10683 15000 1.404065
