How to improve IAQ with EC technology Pablo Varela - Product Manager

Agenda 1.Systemair - A leader within HVAC 2.EC motors vs AC motors 3.The importance of IAQ 4.Demand controlled ventilation 5.EC products How to improve IAQ with EC technology – Pablo Varela

Systemair – ventilation worldwide  Systemair companies in 44 countries  60 companies with 3,300 employees  More then 2.15 millon ft 2 production and warehouse area  Sales of 580 million USD in financial year 2011/12  Listed on the NASDAQ OMX Nordic Exchange  Sales in 100 countries on 5 continents How to improve IAQ with EC technology – Pablo Varela 100 export to more than 100 countries 90% of sales outside Sweden

The Straight Way It all started in 1974 Systemair’s idea exemplified by the development of the duct fan – The straight way How to improve IAQ with EC technology – Pablo Varela

Successful brands with innovative products Ventilation ProductsAir Curtains & Heating products Ventilation Products How to improve IAQ with EC technology – Pablo Varela

Product range Fans and accessories Air handling units Chillers Air distribution products Smoke and heat ventilation Car park and tunnel ventilation Air curtains and fan heaters How to improve IAQ with EC technology – Pablo Varela

Agenda 1.Systemair a leader within HVAC 2.EC motors vs AC motors 3.The importance of IAQ 4.Demand controlled ventilation 5.EC products How to improve IAQ with EC technology – Pablo Varela

Two principal parts  The stator – stationary  The rotor – rotates Rotor Stator Fan Cooling air flow Construction of an AC motor How to improve IAQ with EC technology – Pablo Varela

Winding Commutating electronics Stator package Permanent magnet Rotor Bearing system Hall sensor Construction of an EC motor How to improve IAQ with EC technology – Pablo Varela

Efficiencies of external rotor motors How to improve IAQ with EC technology – Pablo Varela Motor Efficiency [%] Output power [W] EC- motor 3~A C 1~A C Shaded pole motor

EC motor and sound How to improve IAQ with EC technology – Pablo Varela

 Magnetic fields in the rotor are permanent magnets resulting in lower losses  Hall sensor results in less power losses and smother rotation – less slip, less vibration  No chance of sparking unlike brushed motors  Less friction losses  Cool operation leads to much-improved lifetime of the fan’s bearings  Longer lifetime if the motor is speed controlled  Integrated motor protection  No additional wiring  No further componets required  Lower sound Advantages of EC over conventional motors How to improve IAQ with EC technology – Pablo Varela

Frequency regulator EC fan How to improve IAQ with EC technology – Pablo Varela

EC-motor phasecutting [%] % speed transformer Frequency inverter EC 66 %33 % energy cost How to improve IAQ with EC technology – Pablo Varela

Advantages of EC vs VFD  EC motors are more efficient then AC motors  VFD has internal losses  AC motors have additional temp increase in the winding due to voltage/current spikes – bad sinus filter  EC motors have longer lifetime – specially when speed controled  VFD creates harmonics that shortens the life time of the motor How to improve IAQ with EC technology – Pablo Varela

SFP - Specific fan power SFP – Indicates the demand on power efficiency of all supply air and extract air fans in a building How to improve IAQ with EC technology – Pablo Varela

SFP vs Max efficiency q P 0.8” How to improve IAQ with EC technology – Pablo Varela

Why SFP? 1.SFP takes in consideration the complete AHU/Fan (fan, motor, belt drive, frequency converter and design of the fan/AHU) and not only the motor with impeller or the impeller only (FEG) 2.SFP helps you select the most energy efficient ventilation solution at the actual working point How to improve IAQ with EC technology – Pablo Varela

Agenda 1.Systemair a leader within HVAC 2.EC motors vs AC motors 3.The importance of IAQ 4.Demand controlled ventilation 5.EC products How to improve IAQ with EC technology – Pablo Varela

The Värmlands Study Risk Volume change / hour Good ventilation = healthier children children in survey Health How to improve IAQ with EC technology – Pablo Varela

Short term sick leave Performance How to improve IAQ with EC technology – Pablo Varela

Agenda 1.Systemair a leader within HVAC 2.EC motors vs AC motors 3.The importance of IAQ 4.Demand controlled ventilation 5.EC products How to improve IAQ with EC technology – Pablo Varela

DCV - Demand controlled ventilation  Keeping a good IAQ quality is important but providing good IAQ to areas that are not occupied is unnecessary  Why should we ventilate for 50 people when there is 30 people in the room? Examples of measurements:  Åsheim Secondary School  Highest occupancy level 75 %  Average occupancy level 50 %  Office buildings - Big variations, Average occupancy level 30 – 90 % Controlling the amount of air that is ventilated through the use of sensors and VAV units ensures that you ventilate exactly as much you need to provide good IAQ, not more not less. This results in a lower electricity bill (HVAC). How to improve IAQ with EC technology – Pablo Varela

CO2/Temperature Control Optima R CO2 RT How to improve IAQ with EC technology – Pablo Varela

Optima, what does it do? Set point 4 V Set point 5,5 V Good regulation requires good measurement. Pressure increaseSet point constantDamper closeAir volume constantSet point increaseDamper opens Air volume increase How to improve IAQ with EC technology – Pablo Varela

Does it work? Classroom at Åsheim Secondary School Air volume in cfm

Energy saving potential Energy consumption for fans: How to improve IAQ with EC technology – Pablo Varela

Energy saving potential How to improve IAQ with EC technology – Pablo Varela Component Fan 81 % Motor 92 % Component Fan 75 % Motor 80 % Belt drive 85 % Example 7,000 cfm 3 inch wg total

Energy saving potential Example: 7,000 cfm, total 3 inch wg. SI mai 2012 η tot = 100 % 5,10 kW 4,42 kW 3,94 kW 3,70 kW 3,23 kW

Energy saving potential Adjusted: 3,500 cfm, total 1.8 inch wg 1,82 kW 1,68 kW 1,43 kW 1,25 kW 1,03 kW F-wheel B-wheel IE1 motor NEMA EF Cpro – PM  Losses control  Losses motor  Losses belt drive  Losses impeller  Theoretical needed power How to improve IAQ with EC technology – Pablo Varela

Energy saving potential Fans Running 8760 h/yearCpro – PM [kW][kWh/year] CAV-system, 7,000 cfm 100 % constant 3, VAV-system, 3,500 cfm 50 % occupancy level 1, Energy saving fans Energy saving 68 % How to improve IAQ with EC technology – Pablo Varela

Agenda 1.Systemair a leader within HVAC 2.EC motors vs AC motors 3.The importance of IAQ 4.Demand controlled ventilation 5.EC products How to improve IAQ with EC technology – Pablo Varela

Systemair Green Ventilation ”High energy efficiency classification” The best products from an environmental perspective How to improve IAQ with EC technology – Pablo Varela

Air Handling Units Topvex FR False ceiling recovery unit Topvex TR Vertical recovery unit ERV RT-EC Roof Top recovery unit Top connections Plug-and-Play Integral control system Absorption type wheel Pull-pull configuration Economizer function CAV or VAV controlling Low overall height 100% controllable How to improve IAQ with EC technology – Pablo Varela

Commercial fans DVC-P Roof fan MUB Square duct fan K EC Circular duct fan Sound insulated Removable panels Integrated protection Up to 6000 cfm 100% speed controllable Built-in potentiometer Integrated protection Up to 800 cfm Built in pressure controller Low noise emissions Integrated protection Up to 7600 cfm KD-EC Circular duct fan 100% speed controllable Mix flow impeller Integrated protection Up to 6000 cfm How to improve IAQ with EC technology – Pablo Varela

Summary How to improve IAQ with EC technology – Pablo Varela  EC fans are superior to AC fans in terms of  Energy efficiency  Controllability  Sound  IAQ is very important  Occupancy levels of homes, offices, schools etc are between %  Demand control ventilation assures a good IAQ while cutting you electricity bill (ventilation/heating/cooling)  The number 1 solution for DCV are products with EC motors

Thank you for listening How to improve IAQ with EC technology – Pablo Varela