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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

A better tomorrow isdriven by drives