Proprietary and confidential information. Any circulation of this document or parts of it in whatsoever form without explicit permission of ebm-papst is strictly forbidden.Proprietary and confidential information. Any circulation of this document or parts of it in whatsoever form without explicit permission of ebm-papst is strictly forbidden.

Reduce your buildings energy consumption Case Studies – EC fan upgradeHelen McHugh - Head of Sustainable Technology

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Contents

Introduction

Why is it important to consider fans?

How can EC technology reduce energy consumption?

Case Studies Real examples of upgrades to existing HVAC equipment

Air Handling unit – Savings of 66% Fan coil unit – Savings of 66% Data Centre CRAC units – Savings of 78%

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Introduction

World leading manufacturer of fans & motors

Leaders in design & manufacture - High efficiency Fans & Motors

Supplying many markets - key market is HVAC & Refrigeration.

ebm-papst understand the importance of energy efficiency

Work with building owners & managers to identify opportunities for energy savings.

Offer advice, surveys, energy calculations & installation

Replacing inefficient AC fans with high-efficiency EC fans in your

HVAC equipment is a simple way to achieve substantial energy savings

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ebm-papstEC Fan Technology

Axial Fans Backward Curved Centrifugal Forward Curved Centrifugal

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ebm-papstApplications involved in the built environment

HVAC - Commercial

Product: AHU Fan: Backward Curved Centrifugal

Product: FCUFan: Forward Curved Centrifugal

Refrigeration

Product: Chiller Fan: Axial

Product: Cooler / EvaporatorFan: Axial

Data Centre Cooling

Product: CRAC UnitFan: Backward Curved Centrifugal

Product: Fan Array – data centreFan: Backward Curved Centrifugal

Source: Airedale, Nuaire, Ability, GEA Searle, Epta Group.,

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Buildings are a major contributor to CO2 emissions in UK

HVAC accounts for ~40% of a commercial buildings CO2 emissions

Fans & pumps account for ~ 50% of the energy consumed in HVAC

Significant energy & CO2 can be saved by upgrading existing HVAC equipment, fitting energy efficient fans & motors

2 Main reasons to consider fans & motors

1) Government Incentives / Legislation to reduce CO2 emissions

2) Reduce your energy bill - SAVE MONEY!

Reduce your buildings energy consumptionWhy should you consider Fans?

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Government Incentives / Legislation

1. Enhanced Capital Allowances (ECAs) business claim tax relief on investments made on equipment meeting energy saving criteria. (listed on ETL)

EC fans qualify for ECA’s

4. Ecodesign of Energy related Products Directive – ErP Imposes minimum energy efficiency levels for products

Minimum efficiency levels set for Motors 2011 & Fans 2013

5. CRC Encourages organisations to develop Energy Management Strategies

3. CCA’s Climate Change Agreement Voluntary agreements for industries, if they agree to energy efficiency targets

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Heating64%

Cooling & Ventila-

tion6%

Lighting8%

Other22%

Hospitality: Typical Hotel

~70% of energy consumed results from HVAC

“Any money saved on energy goes directly to the bottom line - a 20% cut in energy costs can represent the same bottom line benefit as a 5% increase in sales”

Reduce your energy billWhy should you consider Fans?

Annual energy costs for the sector: In excess £1 billionApprox. 100,000 hotels / pubs in the UKUpgrading fans - can not only reduce energy bills but also improve customer comfort

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Heating39%

Cooling & Ventilation

8%

Refrigeration16%

Lighting30%

Other7%

Retail:

~50% of energy consumed results from HVAC

Reduce your energy billWhy should you consider Fans?

Top 4 supermarkets have over 5,000 stores in UKOver 450 shopping centre in UKUpgrading the fans can not only reduce energy bills, but also extend life of produce

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Data Centres:

~50% of energy consumed results from HVAC

Reduce your energy billWhy should you consider Fans?

Cooling & Ventila-

tion54%

Lighting2%

IT Load38%

UPS Losses6%

Data Centres are a major user of energy - set to riseConsume ~ 2% of the national grid – 1,000MW35 - 40,000 facilities in the UK with power >100kWLargest data centre in UK ~30MW

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EC FansWhat are they? And why are they more efficient?

Permanent magnet motors with integrated speed control

Energy efficiency More energy efficient than standard induction motors

Speed Control Integrated speed control - no additional VSD is required.

Reduced Noise Reduced noise under speed control

Compact design Integrated motor & speed control

Reduced maintenance No belts & pulleys

Built in Power factor correction

AC to DC conversion

CommutationElectronics

Permanent magnet

Stator

Rotor

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EC Benefit Integrated Speed Control allows for fan speed to be modulated

Energy efficiency

0%

25%

50%

75%

100%

13% 25% 38% 50% 63% 75% 88% 100%

airflow capacity

po

wer

in

pu

t

On/Off operation

EC modulation

P1 ~ n3

Bar chart shows Power input V’s number of fans used.

Ie. For a 4 fan system. - Switching off 2 fans gives 50% reduction in airflow & 50% energy saving.

Line graph shows power input for fans controlled via variable speed.

Ie. For a 4 fan system. - running all fans @ ½ speed gives 50% reduction in airflow & ~80% energy saving.

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EC Benefit Control & Monitoring Options

1) Integrated demand based control of fan speed means that the fan is only used when needed

2) Continuous speed adjustment reduces noise, provides a more even flow of air and reduces energy consumption

3) Simply connect a sensor to the motor for demand control against any parameter.

4) Larger fans have modbus

5) Bluetooth control is available

The Integrated electronics - allow for simple speed control

?

· Refrigerant pressure

· Temperature

· Air pressure

· Air volume

· Manual setting

· Any sensor

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Case studyAHU Fan Upgrade at Copenhagen Central Station

Copenhagen train station upgraded their HVAC systems to use EC fans.

AHU’s are located in the basement, supplying the Shopping Centres & Restaurants.

5 AHU’s were upgraded

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Case studyAHU Fan Upgrade Copenhagen Central Station

Original Fan Used

Forward curved belt driven blowers

(AC) Induction motor

Fixed speed

Power Consumption 1,282 kW / week (5 fans)

Replacement Fan (ebm-papst EC)

Backward curved plug fans

PM (EC) motor

Variable speed

Power Consumption 435 kW / week (5 fans)

Source : ebm-papst Denmark

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Case studyAHU Fan Upgrade Copenhagen Central Station

Source : ebm-papst Denmark

Savings (annual) Based on 5 fans

Energy Saving % 66%

Energy (Kwh) 44,000

Value (£) £4,400

Carbon (Tonnes) 6.5

Original Fan Used

Forward curved belt driven blowers

(AC) Induction motor

Fixed speed

Power Consumption 1,282 kW / week (5 fans)

Replacement Fan (ebm-papst EC)

Backward curved plug fans

PM (EC) motor

Variable speed

Power Consumption 435 kW / week (5 fans)

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Case studyAHU - London

Original Fan Used

Forward curved belt drive blower 2 x AC motor (1 for redundancy) Fixed speed Power Consumption 6.3kW

Replacement Fan (ebm-papst EC)

Backward curved plug fan PM (EC) motor Variable speed Power Consumption 1.9kW

12 AHU’s serve the repository

Operation. 10 hrs/day. 6 days/wk.

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Case studyAHU - London

12 AHU’s serve the repository

Operation. 10 hrs/day. 6 days/wk.

Savings (annual) Per Unit All 12 Units Energy Saving % 70%Energy (Kwh) 13,728

164,736 Value (£) £1,650 £19,768 Carbon (Tonnes) 2.0

24.5Payback period 2.5 years

* Assumptions•Units operating 31,200 hrs / year•Electricity cost £0.12/kWh (incl. CRC costs)•kWh to CO2 conversion factor = 0.54522•CO2 to Carbon conversion factor = 0.2727

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Case studyOffice Fan Coil Unit

Office building: 250 FCU’s

2 fans per unit

Induction Motor (AC)

motor efficiency @ Operation point 25 %

Energy consumed per FCU. 137 WSFP = 0.75

EC Motor (permanent magnet) motor efficiency @ Operating point 78 %Energy consumed per FCU. 46 WSFP = 0.25

66% energy saving

Savings (annual) per unit 250 unitsEnergy Saving % 66%Energy (Kwh) 455 113,750Value (£) £45.50 £11,375Carbon (Tonnes) 0.068 17.0

Additional benefits• Lower noise• Stepless speed control• Improved occupant comfort

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Case studyFan Coil Unit

Old AC twin fan deck New EC double fan unit.

Same fan dimensions Supply as deck for easy installation Can include potentiometer, or connect to BMS Includes wiring Includes filter to provide high power factor

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Case Study CRAC unit - Airedale DF50CW

Original Fans Used• 2 x Forward Curved Blower Belt drive • Absorbed Power (1 unit @ 100%) 5.6 kW

Replacement Fan (ebm-papst EC)● 2 x Backward curved EC plug fans● Absorbed Power

● (1 CRAC unit @ 100%) 3.4 kW● (2 CRAC units @ 50% each) 0.84kW

Savings: Operation 24 hours / day, 365 days / year

Savings (annual) 1 unit matched airflow 2 units @ 50% eachEnergy saving % 39% 85%Energy (KWh) 19,272 41,698 Value (£) £1,927 £4,170Carbon (T) 2.9 6.2Payback Period ~ 21 Months ~19 Months

Source : Airedale

The room has 2 CRAC units. 1 runs @ 100% & the other is on standby.

Suggest that both CRAC units run @ 50% each.

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Case StudyCRAC unit - Airedale DF50CW

Old fans were removed Increased the size of the opening in the floor Plug fans installed in the floor

39% energy saving (1 CRAC unit running @ 100%)85% energy saving (2 CRAC units running @ 50% each)

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Case StudyData Centre CRAC Unit - Airedale DF90CW

43% energy saving @ matched Performance67% energy saving @ commissioning

OriginalDouble inlet Blowers removed

NewEC fans fitted above floor in POD designFloor Void opened to optimise airflow

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Case StudyComputer Room Cooling – Diamond Light Source

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Case StudyComputer Room Cooling – Diamond Light Source

Phase 127 x Stulz downflow units

Upgrade original AC Fans for high efficiency EC fans.

Aim was 2 fold

1. Reduce energy consumption

2. Reduce noise / vibration

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Case StudyComputer Room Cooling - Diamond Light Source

Original Fans Used• 2 x Forward Curved Blower Belt drive Absorbed Power 2.4 kW

Replacement Fan (ebm-papst EC)● 2 x Backward curved EC plug fans● Absorbed Power 1.1 kW

Savings: Operation 24 hours / day, 365 days / year

Savings (annual) Per Unit 27 units (optimised)Energy saving % 55% 55%Energy (KWh) 11,738 316,926 Value (£) £1,174 £31,700Carbon (T) 1.7 46

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Summary

The easiest way to reduce our carbon emissions is by using more energy efficient products.

Government & European legislation is setting higher efficiency levels.

ErP directive for fan efficiency means that many (AC) Induction motors no longer comply.

EC-Technology is an established alternative technology that easily exceeds current & future efficiency targets.

EC-Technology can be easily installed as an upgrade to existing equipment.

EC-Technology offers more energy saving than meets the eye.

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Thank you

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Helen McHughHead of Sustainable Technology

Email: helen.mchugh@uk.ebmpapst.comPhone: 07802 201891

ebm-papst UK Ltd

Chelmsford Business ParkChelmsfordEssexCM2 5EZ