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AMCA International January 2009 Chicago, IL

AMCA International January 2009 Chicago, IL. Energy Efficiency Classification for Fans John Cermak, Ph.D., P.Eng ., M.Sc. Executive Vice President ACME Engineering and Manufacturing Corp. Fan Industry. Energy Consumption Challenge. What is Happening?. What is happening. ASHRAE

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AMCA International January 2009 Chicago, IL

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  1. AMCA InternationalJanuary 2009Chicago, IL Energy Efficiency Classification for Fans John Cermak, Ph.D., P.Eng., M.Sc. Executive Vice President ACME Engineering and Manufacturing Corp.

  2. Fan Industry Energy Consumption Challenge

  3. What is Happening? 3

  4. What is happening ASHRAE • 90.1 Standard (revision 2010) • TC 5.1 Fans - ad hoc WG 90.1 4

  5. What is happening AMCA International • Mid-year and annual meetings 08 • Fan Committee – SC for AMCA 205 • AMCA Standard 205 “Energy Efficiency Classification for Fans” 5

  6. What is happening ISO/TC 117 Fans • WG 11 Fan Efficiency • DIS 12759 Energy Classification for fans 6

  7. What is happening AMCA International active in ASHRAE ANSI ISO 7

  8. Purpose

  9. Purpose AMCA International supporting Legislative bodies Regulatorybodies in U.S.A. as well as in other countries 9

  10. Purpose Establishing ways and goals to achieve significant energy savings in usage of fans 10

  11. Purpose Making the application of fans fitting the energy consumption goals without making it difficult 11

  12. Corner Stones

  13. Corner Stones Fan energy efficiency based on fan total pressure 13

  14. Corner Stones Tool for regulative bodies 14

  15. Corner Stones Support fan manufacturers’ effort to improve the energy efficiency of their products 15

  16. Corner Stones As much as possible keep one series in one efficiency grade 16

  17. Corner Stones Fan peak total efficiency of a fan series is dependent on fan size 17

  18. Corner Stones Defining areas of responsibility for: Fan manufacturer Motor manufacturer HVAC system designer 18

  19. Fan Total Pressure Why?

  20. Total or Static? Fan creates pressures: dynamic (velocity) and static 20

  21. Total or Static Both pressures are also specific energies a unit of flow exerted into the air by a fan 21

  22. Total or Static? • Fan is a device to create airflow as its primary function • The motion of the air carries dynamic (velocity) energy 22

  23. Total or Static? Fan total pressure is sum of dynamic (velocity) pressure and static pressure 23

  24. Answer For fan selection are needed at least two from the three fan pressures: totalandvelocity staticandvelocity totalandstatic 24

  25. Fan Selection 25

  26. Fan Selection 26

  27. Fan Selection 27

  28. Fan Selection 28

  29. Fan Selection • Matching the pressure drop across the system against fan static pressure does not give the correct flow, fan size and power 29

  30. Fan Selection 30

  31. Fan Selection 31

  32. Using Fan Discharge Energy 32

  33. Using Discharge Energy 33

  34. Using Discharge Energy 34

  35. Using Discharge Energy 35

  36. Fan Characteristics 36

  37. Fan Energy Efficiency • Fan is a device creating air flow and transferring energy from the motor into the air • Fan Total Pressure is the total energy exerted into air by fan 37

  38. Fan Energy Efficiency 38

  39. Fan Energy Efficiency 39

  40. Fan Energy Efficiency 40

  41. Fan Energy Efficiency 41

  42. Fan Energy Efficiency 42

  43. Fan Energy Efficiency Fan energy (total) efficiency Fantotalenergy Energy from motor 43

  44. pTE 44

  45. pTE 45

  46. The characteristic of the fan energy transformation quality is fanpeak total efficiency pTE 46

  47. Fan total efficiency changes along the fan pressure curve significantly pTE 47

  48. Fan size and pTE 48

  49. pTE At constant tip speed the fan pTE of a fan Series changes with the fan size 49

  50. pTE and Fan Size 50

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