Energy Efficiency Classification for Fans Boring presentation on a - - PowerPoint PPT Presentation

Energy Efficiency Classification for Fans

Boring presentation on a hot issue by John Cermak ACME Engineering and Manufacturing Corp.

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HISTORY

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Why Classification

• Regulatory and legislative bodies are working
• n 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

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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

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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

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WHERE WE ARE ON EFFICIENCY?

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Fan Peak Efficiency

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Fan Peak Efficiency

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Energy Efficiency of U.S. Fans

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Energy Efficiency of U.S. Fans

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Energy Efficiency of U.S. Fans

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Energy Efficiency of U.S. Fans

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WHERE IS THE CEILING?

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Energy Efficiency Potential

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AF

Energy Efficiency Potential

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AF VA

Energy Efficiency Potential

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AF VA FC

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

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WHAT WE WERE ASKED TO DO

(WE=USA)

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Single Value Efficiency Limit

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Single Value Efficiency Limit

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AND WHAT WE DID

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Fan Size Sensitive Limit

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Fan Size Sensitive Limit

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Fan Size Sensitive Limit

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Fan Efficiency Grade ‐ FEG

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FEG Index

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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

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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

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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

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FEG Summary

• In AMCA 205 we added a requirement for

system designers to use the fan in the upper part of the pressure curve

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Why this requirement?

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Why this requirement?

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Why this requirement?

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Why this requirement?

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Why this requirement?

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Why this requirement?

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Why this requirement?

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HOW TO FIND YOUR FEG

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How to find FEG for your fan

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How to find FEG for your fan

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How to find FEG for your fan

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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

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WHAT THEY WERE ASKED TO DO

(THEY=EU)

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Direction

• Develop efficiency classification by fan categories
• Use of static efficiency
• Classify fan/motor system efficiency as a function
• f the motor input power

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WHAT THEY DID

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FMEG

• Fan/Motor Efficency Grade – 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)

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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

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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

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FMEG Summary

• No separation of responsibilities
• Fan selection is try and error exercise

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WHAT WE NEED TO KNOW ABOUT FAN EFFICIENCY

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Electromotors

• Efficiency is ratio of the power going out to

the power going in

• Power measured:

–

in – electric power

–

• ut ‐ mechanical power

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Electromotor

• For regulatory or legislative purposes

concerning energy is listed MAXIMUM efficiency

• No concern how the output power is used

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Fan

• Fan has a number of efficiencies:

– total – static – mechanical – volumetric etc.

• For energy efficiency classification only one:

– peak fan (total) efficiency

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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

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Fan

• An order for a fan with zero pressure?

YES

• An order for a fan with zero flow?

NO

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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

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Fan

• Fan – performs air transport (heat, moisture,
• deur 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

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WHAT IS NEXT

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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

• f 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

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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

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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

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THANK YOU FOR YOUR ATTENTION YOUR QUESTIONS ARE WELCOME

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