Energy Efficiency Classification for Fans Boring presentation on a hot issue by John Cermak ACME Engineering and Manufacturing Corp . 1
HISTORY 2
Why Classification • Regulatory and legislative bodies are working on energy efficiency limits for fans looking for simple and clear requirements • EU – orientation towards fan/drive system configuration within fan categories • ASHRAE – 90.1 revision 2010 – orientation towards the fan without drives 3
What we have • ISO 12759 “ Fans – Efficiency classification for fans ”is in the FDIS stage • AMCA 205 “ Energy Efficiency Classification for fans ” has been approved by AMCA 4
What we have • Two principally different but complimentary approaches are finalized in both documents • Special TF for administration of the program submitted its proposal to the AMCA Board 5
WHERE WE ARE ON EFFICIENCY? 6
Fan Peak Efficiency 7
Fan Peak Efficiency 8
Energy Efficiency of U.S. Fans 9
Energy Efficiency of U.S. Fans 10
Energy Efficiency of U.S. Fans 11
Energy Efficiency of U.S. Fans 12
WHERE IS THE CEILING? 13
Energy Efficiency Potential AF 14
Energy Efficiency Potential AF VA 15
Energy Efficiency Potential AF VA FC 16
Reaching the Potential • Presence of the market need comes from: – Reaction to the energy costs – Legislation and regulation • High efficiency fan design (R&D) – Cost – Time 17
WHAT WE WERE ASKED TO DO (WE=USA) 18
Single Value Efficiency Limit 19
Single Value Efficiency Limit 20
AND WHAT WE DID 21
Fan Size Sensitive Limit 22
Fan Size Sensitive Limit 23
Fan Size Sensitive Limit 24
F an E fficiency G rade ‐ FEG 25
FEG Index 26
FEG Index • FEG can be based on AMCA certified data, no further testing necessary • You have certified product – you can get FEG • Administration of verification is simple 27
FEG Index • Total efficiency of a fan without drives is the highest efficiency value • FEG intended for commercial fans – selections coming from a large pool of products 28
FEG Summary • Rates the fan capability to use the energy • Tailored to the physical behavior of fans in homological series • Divides responsibilities and offers simple communication among: – regulatory body – system designers – fan manufacturers 29
FEG Summary • In AMCA 205 we added a requirement for system designers to use the fan in the upper part of the pressure curve 30
Why this requirement? 31
Why this requirement? 32
Why this requirement? 33
Why this requirement? 34
Why this requirement? 35
Why this requirement? 36
Why this requirement? 37
HOW TO FIND YOUR FEG 38
How to find FEG for your fan 39
How to find FEG for your fan 40
How to find FEG for your fan 41
Your FEG • No need for using graphs • From your AMCA certified data the appropriate FEG can be assigned by computer • For fan selection with required FEG the computer can offer only fans with equal or higher FEG – selection is direct 42
WHAT THEY WERE ASKED TO DO (THEY=EU) 43
Direction • Develop efficiency classification by fan categories • Use of static efficiency • Classify fan/motor system efficiency as a function of the motor input power 44
WHAT THEY DID 45
FMEG • F an/ M otor E fficency G rade – FMEG • Fan/drive system efficiency depending on input power as curves were developed for three groups of fan categories: – Axial, FC, R and mixed flow (FMEG66) – BC, BI, AF with and without housing (FMEG76) – Cross flow (FMEG32) 46
FMEG • Fan/drive system includes any devices between the motor and the power supply • For each combination of fan/motor system the efficiency is unique • The efficiency is calculated for all components with exception of the fan 47
FMEG Summary • Justification of use of low efficiency fans • Administration of verification next to impossible – exception : direct drive • Complicated for communications among regulatory body, system designer and fan manufacturer 48
FMEG Summary • No separation of responsibilities • Fan selection is try and error exercise 49
WHAT WE NEED TO KNOW ABOUT FAN EFFICIENCY 50
Electromotors • Efficiency is ratio of the power going out to the power going in • Power measured: in – electric power – out ‐ mechanical power – 51
Electromotor • For regulatory or legislative purposes concerning energy is listed MAXIMUM efficiency • No concern how the output power is used 52
Fan • Fan has a number of efficiencies: – total – static – mechanical – volumetric etc. • For energy efficiency classification only one: – peak fan (total) efficiency 53
Fan • For legislative and regulatory purposes concerning energy only fan peak total efficiency characterizes the fan capability to transform energy • This does not affect how to present data for fan selections and use of SP and SE or how the function of a fan can be evaluated for different purposes 54
Fan • An order for a fan with zero pressure? YES • An order for a fan with zero flow? NO 55
Fan • Flow is the parameter always required by a user • Flow is mass in motion ‐ mass in motion carries energy • All air energy, not only static, is always used 56
Fan • Fan – performs air transport (heat, moisture, odeur etc.) • For transport one needs to pay freight • Freight covers the whole price of the transport • Fan user pays for the energy and uses it for air transport 57
WHAT IS NEXT 58
Program Administration • AMCA Board will provided direction and time frame for the task • The AMCA Fan Committee shall develop the method by which fan performance data is processed into FEG’s and FMEG’s. Their work shall, as best as possible, incorporate requirements that will satisfy EC legislation on ecodesign of fans relevant to FMEG’s. The AMCA Marketing committee shall develop a marketing strategy to promote certifying of FEG’s and FMEG’s. The new FEG/FMEG seal will be presented to the membership. • Possible participation by a member from EU to assure understanding of special issues 59
Options • Anyone can claim FEG or FMEG • Grade claim can be required by: – Regulatory or legislative body – Anyone • Grade claim can be required with: – Self ‐ certification – Third party verification 60
Options • Third party verification: – AMCA using CRP data ( FMEG only in special cases ) – An independent lab • FMEG – direct driven fans with dedicated motor – using CRP data • FMEG – generally the fan without drives can use CRP data for peak efficiency and let the rest of calculation for self ‐ certification 61
THANK YOU FOR YOUR ATTENTION YOUR QUESTIONS ARE WELCOME 62
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