advance technologies to improve system efficiency in hvac&r · ec+ brings saving of inr...
TRANSCRIPT
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Advance Technologies to improve system efficiency in HVAC&R
Vinod Jethani
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Mumbai has highest number of green buildings (#753)
Key Benefits –
•Efficient systems to save 30-40% power consumption
•20-30% reduction in water consumption,
•Enhanced ventilation,
•Better views, strong daylighting, and enhanced health, sanitation, well-being and productivity of occupants. * Source -IGBC
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Temperature in Mumbai rose faster than most Cities in 40 years
* Source – TOI
Much more would be submerged in Mumbai, if temperatures rose by four degrees
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Energy Efficiency first-
• 40% of emissions reductions is needed by 2030 from EE
• EE most cost-effective way to decarbonize our economy, while helping to decouple GDP growth from energy use
• Ready for implementation of energy efficiency technologies exist and it is a good business case
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Making Buildings Green
• Shanghai Tower will comply with the strictest environmental requirements – technologies for
the heating, ventilation and air-conditioning system will help to achieve this
Results -6,700 control valves will save 20% and 660 variable speed drives 20-40% Increases occupant comfort as people get the temperature they
want quickly
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Hamburg HafenCity
• A whole new city quarter, called HafenCity, has been built in the heart of Hamburg, Germany
• Technologies keep consumption of power, heating and cooling to a minimum. For example, all buildings are supplied with district heating generated by combined heat and power plants
Results
• Saves approx. 3.7 million euros in fuel costs and 14,000 tons of
CO2 every year (compared to a conventional fossil heat supply)
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Cleaning Wastewater and Generating Energy
• In the Danish city of Aarhus, a water treatment plant not only ensures clean water – it also
produces more energy than it consumes
Results
• Produces 140% electricity (40% excess electricity) and 2.5 GWh excess heat (used in the district energy system)
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Doubling the Income for Farmers in India
• India is one of the largest producers of food
• 30% of the food produced is lost in transportation and storage processes – a result of poor cooling conditions
• Tamil Nadu loses around 20% of food produces which equals 360 Mio USD in income annually
• Food losses can be reduced by
10-12% which would help save close to 200 Mio USD
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Potential and Current Implementation for High Energy Efficiency in various system
100%
80%
60%
40%
20%
0%
PumpsVariable Speed Drives*
Food refrigeration
Efficient Motors
District Energy
Control Valves
80% 50-60%
38%2%
80%
7%
� Market penetration � Potential
3%
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Internationally applicable testing Standard IEC 60034-2-1 for electric motors and a
classification scheme IEC 60034-30-1 with four levels of motor efficiency ("IE-code")
International MEPS(Minimum Efficiency Performance Standards acc. IEC 60034-30)
� New IE Efficiency classes for induction motors have become mandatory in many countries
� OEM and end users are looking for solutions to full fill these standards
� India has a comparative efficiency label since 2009 and a voluntary standard on IE2 level
since 2012.
IE2: Applied IE3: 2015/2017
IE2: Applied IE3: 2015/2017
IE2: Applied IE3: Applied
IE2: Applied IE2: Applied IE3: 2013
IE2: Applied
IE2: Applied IE3: Applied
IE2: Applied
IE2: Expected
Only a selection of valid MEPS are shown. No claim to the completeness and up-to-dateness
IE1: Applied
IE2: Applied IE3: 2014
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Motor Efficiency Vs Speed, compared without drive losses
65
70
75
80
85
90
95
100
500 1000 1500 2000 2500 3000 3500 4000 4500
Speed [RPM]
Eff
icie
ncy [
%]
Optimized 3 Phase Induction Motor
PM/IE3 Motor measured efficiency
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Air Handling Units (AHUs) & Plugfans
AHU with X-flow Heat Recovery
Belt-driven Centrifugal fan Plugfan
Decentral Drives Motor optimal
for plugfans
Parallel Plugfans and drives inside AHU
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EC Motor Solution pros and cons
EC Motor SolutionVery Compact.. But compactness comes at a price
Airflow through fandisturbed by Motor
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High System Efficiency Solution -
• Ideal undisturbed airflow
through Fan
Variable Frequency Drive
fan/pump/etc. frompreferred supplier
PM / IE 3 Motor motor frompreferred supplier
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ILK Dresden Test Results
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The following fan drive systems were tested:�A Permanent Magnet IE4 motor with a frequency converter�An asynchronous IE2 motor with a frequency converter�An asynchronous IE3 motor with a frequency converter
�An EC fan with an integrated motor
ILK Dresden Tests Scope
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ILK Dresden Test Results
EC+ delivers best System Efficiency
10%10.8% lower system losses using VFD + PM motor + Plug fan in Ventilation systems
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EC+ Brings 6.7% higher System EfficiencyEC+ Brings 10.8% lower losses
EC+ Brings saving of INR 25696=00/ Year on Electricity Bill(Above Example)
Energy Saving - Example
�Airflow 6 m3/s per fan�System Pressure 600 Pa�Operation 365 days/Year�Operation 16 hours /day�Energy Price INR 5.5/kWh
� System Efficiency 63%� Power Consumption 11.4kW� Annual Electricity Bill INR 366168/-
� System Efficiency 59%� Power Consumption 12.2kW� Annual Electricity Bill INR 391864/-
EC+
EC Motor
10%10-8% lower system losses using PM Motor + VFD in Ventilation Systems
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To summarize : EC+ Benefits
� Optimize system efficiency by selecting best in
class individual motor/drive/fan components
� Best in class motor and system efficiency –
ensuring LCO
� Offers motor independency – (PM or IM- IE3)
� Broader range with a PM/IE3+VSD up to 400
KW+
� Easy & wide selection of BMS Integration
� Broader diagnostics & energy measurement
with a VSD
� More drive/motor protection with a VSD
� PM+VSD equally or better in overall technical
& commercial competitiveness