1. 1. 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. Optimising building performance and reducing energy consumption Tony Wright Divisional Director Upgrade
2. 2. 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.2 Energy saving potential of EC fans and motors Contents Introduction to ebm-papst. Energy consumption in legacy buildings What is EC technology & Key benefits how it reduces power consumption & CO2 emissions. Case studies demonstrating the energy savings. Air Handling units Savings up to 60% Fan coil units Savings up to 66% Data Centre CRAC units Savings up to 78%
3. 3. 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.3 About ebm-papst World leading manufacturer of fans & motors Founded in Germany in 1963 UK Subsidiary opened in 1975 18 Production sites and 57 Sales Offices 1.5 billion turnover. (2013/14) 14,500 different variants A Green Company through & through
4. 4. 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.4 ebm-papst A Green Company Hollenbach new factory in Germany - 20 million EUR investment. Completed in 2007, designed for maximum energy efficiency from the very first planning stage. The most important features of the high-tech location include its own power generation using a photovoltaic system and a cleverly devised system for ventilating, cooling and exploiting the residual heat generated on the 13,000 square metre building. A new factory of this size would usually need about 850,000 kWh per year for heating and cooling. Our factory needs less than one tenth of that amount !!!
5. 5. 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.5 The Quest for a Green Building Energy Water Indoor Air Quality Materials Site
6. 6. 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.6 Typical Energy Used in Legacy Commercial Buildings HVAC Lighting Computers Other Water Heating 50% 25% 10% 13% 2%
7. 7. 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.7 AHU Chillers, Condenser, Coolers Data Centre Cooling Source: Airedale, Emerson, Nuaire, Ability, GEA Searle, Epta Group., FCU Upgrade opportunities in HVACR applications
8. 8. 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.8 Traditional AC fan Versus EC Fan AC to DC conversion Commutation Electronics Permanent magnet Stator Rotor AC motor EC motor Stator Windings 2 sets of copper windings External speed control required Low efficiency due to copper losses Permanent magnet on rotor. AC mains Input converted to DC onboard Integrated variable speed control (0 10v or PWM) High efficiency (exceeds IE3)
9. 9. 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.9 Whats so special about an EC fan? 1) Energy efficiency EC motors are around 30% more efficient due to secondary magnetic field comes from permanent magnets rather than copper windings. 2) System Efficiency EC fans operate outside their preferred operating range & still maintain a high level of efficiency 3) Speed Control Integrated speed control means fans have infinitely variable speed , no additional VSD is required. Allows for simple speed control, constant volume or constant pressure control etc. also remote control & monitoring via modbus 4) Reduced Noise 5) Compact design Integrated motor & speed control 6) Reduced maintenance
10. 10. 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.10 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 powerinput On/Off operation EC modulation P1 ~ n3 Bar chart shows Power input Vs 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 @ speed gives 50% reduction in airflow & ~80% energy saving.
11. 11. 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.11 EC Benefit Integrated Speed Control allows for fan speed to be modulated Noise Reduction Bar chart shows Noise reduction achieved by reducing the number of fans running. Ie. For a 4 fan system. - Switching off 2 fans gives 50% reduction in airflow & 3dBA noise reduction Line graph shows Noise reduction achieved by speed controlling all fans. Ie. For a 4 fan system. - running all fans @ speed gives 50% reduction in airflow & 15dBA noise reduction -24 -21 -18 -15 -12 -9 -6 -3 0 13% 25% 38% 50% 63% 75% 88% 100% airflow capacity noisedifference[dBA] On/Off operation EC modulation Log. (On/Off operation) delta Lp [dB] = 50 x log10 (n1/n2)
12. 12. 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.12 Demonstrating the Benefits of Modulation Supermarket. Chiller Original Fans Used 3 AC fans (Backward Curved) Speed Control - Via Stage Control Average Fan Power (Using Stage Control) 2.54 kW Replacement Fan (ebm-papst EC) 3 EC fans (Backward Curved) Speed Control - Via Modulation Average Fan Power (Using Stage Control) 1.22 kW (Using Modulation) 0.55 kW Savings From Switching to EC. EC Fan. still using stage control 52.0% EC Fan. using Modulated speed Control 78.3%
13. 13. 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.13 Case Studies Energy savings resulting from motor efficiency optimising system design HVAC applications covered Air Handling Units Fan Coils Data Centre CRAC Units
14. 14. 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.14 Case study AHU - The National Archives (Repository) Original Fan Used Forward curved belt driven 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 AHUs serving the repository Operation. 10 hrs/day. 6 days/wk.
15. 15. 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.15 Case study AHU - The National Archives (Repository) AHUs serving 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 24.5 Payback 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
16. 16. 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. Case Study Fan Coil Units - Company HQ building London Aims: 1. Reduce energy consumption of HVAC equipment 2. Reduce maintenance 3. Increase controllability Scope: - 10 floor building - Total ~ 1200 FCUs Problem with existing FCUs - AC fan motors, coming to end of life - Poor speed control function - No monitoring Date: Nov 2014 Collaboration: CBRE - Norland Managed Services, ebm-papst UK, Cinque Energy Solutions
17. 17. 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. Case Study Fan Coil Units - Company HQ building London AC Fan Decks 49 FCUs / wing each floor. Total ~ 1200 units in the building. 2 sizes of FCU Small (208) Large (212) 4 speed settings (manual) EC Fan Decks Small unit - (2 x D3G133) Large unit - (3 x D3G133) Variable speed control Via 0 10v
18. 18. 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. Case Study Fan Coil Units - Company HQ building London Measurements Single Fan coil was measured for 1 week prior to fitting EC fans This showed that a constant power draw was maintained during running hours. Average ~ 250w Power measurements before 212 model
19. 19. 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. Case Study Fan Coil Units - Company HQ building London Measurements Spot Measurements taken on individual FCUs before and after the EC fans fitted. Large unit Small Unit AC fan deck (W) 247 150 EC fan deck (W) 49 54 Saving (W) 198 96 % saving 80% 64% 0 50 100 150 200 250 300 208 212 PowerDrawperunit(w) FCU Model Power draw / FCU AC Fans fitted EC Fans fitted
20. 20. 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. Case Study Fan Coil Units - Company HQ building London Annual Savings Forecast Annual savings Operating Hours: 12hrs / day, 260 days / year Floor 2 East Wing Total Building Qty of Units 49 1200 Run time (hrs / year) 3,120 3,120 AC fan deck (kW) 10,066 246,514 EC fan deck (kW) 2,506 61,371 Annual Savings % Saving 75% 75% Power kWh 23,587 577,641 Power () 2,000 49,000 CRC () 194 4,800 Total Financial Saving 2,194 53,800 CO2 (T) 12 303 C (T) 3 83 Assuming Operating Hours: 12hrs / day, 260 days / year Energy Cost: 0.085 / kWh CRC cost: 15.60 / t
21. 21. 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. Case Study Diamond Light - Computer Room Cooling 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 Energy saving % 55% 67% Energy (KWh) 11,738 316,926 Value () 1,174 31,700 Carbon (T) 1.7 46
22. 22. 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.
23. 23. 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. Tony Wright Divisional Director Upgrade ebm-papst UK Ltd Chelmsford Business Park Chelmsford Essex CM2 5EZ Thank You