AHU10 SterilAire Test Data

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AHU-10Steril-Aire Test Data
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AHU-10 Notes

• Dry bulb (before) and dry bulb (after)
  temperatures are almost identical, within
  5/100ths of each other.
• Wet bulb (before) and wet bulb (after)
  temperatures are almost identical, within
  79/100ths of each other.
• We see substantial improvement in heat transfer
  ability of the coil, as indicated by the Life
  Cycle Cost Estimate Sheet with a net cooling
  capacity gain of 201,033 BTUH.
• The fact that the dry bulb and wet bulb
  temperatures before and after are so close bodes
  well for using this averaging method as a safe
  way to determine savings.
• We see a decrease in CFM from 17,084 to 16,735 (a
  2.1 decrease). We also see a corresponding
  9/100th of an inch decrease in static pressure
  across the coil, primarily attributed to the
  elimination of the bio-film and increased latent
  heat transfer.

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ACC AHU-27Steril-Aire Test Data
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AHU-27 Notes

• Dry bulb (before) and dry bulb (after)
  temperatures are almost identical, within
  83/100ths of each other.
• Wet bulb (before) and wet bulb (after)
  temperatures are almost identical, within 1.58ºF
  of each other with the (after) being a more
  severe condition.
• We see substantial improvement in heat transfer
  ability of the coil, as indicated by the Life
  Cycle Cost Estimate Sheet with a net cooling
  capacity gain of 295,079 BTUH.
• The fact that the dry bulb and wet bulb
  temperatures before and after are so close bodes
  well for using this averaging method as a safe
  way to determine savings.
• We see a slight increase in CFM from 22,646 to
  22,744, (0.005 increase). However, we see a .2
  inch decrease in static pressure across the coil,
  primarily attributed to the elimination of the
  bio-film and increased latent heat transfer while
  maintaining a constant CFM.

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AHU-27 Notes continued

• The (after) OSAH is higher by 8.00 which
  correlates to more severe average wet bulb
  condition during the (after) readings.
• Amperage has only increased by an average of 1.48
  amps . and Hertz has only increased by 2.92Hz
  which may correlated to the more severe wet bulb
  climate we incurred during the (after data)
  collection causing greater latent capacity and
  moisture removal at the coil. It could also be
  partially contributed to filter loading and
  changing cycles.

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AHU-1Steril-Aire Test Data
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AHU-1 Notes

• Dry bulb (before) and dry bulb (after)
  temperatures are almost identical, within
  18/100ths of each other.
• Wet bulb (before) and wet bulb (after)
  temperatures are almost identical, within
  72/100ths of each other.
• We see substantial improvement in heat transfer
  ability of the coil, as indicated by the Life
  Cycle Cost Estimate Sheet with a net cooling
  capacity gain of 530,815 BTUH.
• The fact that the dry bulb and wet bulb
  temperatures before and after are so close bodes
  well for using this averaging method as safe way
  to determine savings.
• We see an increase in CFM from 28,465 to 30,684,
  (a 7.3 increase). We also see a corresponding
  6/100th of an inch increase in static pressure
  across the coil, primarily attributed to the
  elimination of the bio-film and increased latent
  heat transfer.

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AHU-1 Notes continued

• We see a (before) chilled water Delta T of 8.54ºF
  and an (after) chilled water Delta T of 11.73ºF
  which is a 27.2 increase.
• We see a cooler supply air temperature (after) of
  57.29ºF vs. the (before) average of 58.85ºF.
• The (after) OSAH is higher by 3.67 which
  correlates to more severe average wet bulb
  condition during the (after) readings.
• Amperage has only increased by an average of 1.35
  amps . And Hertz has only increased by 1.5Hz
  which may correlated to the 7.3 increase in CFM
  and 6/100ths of an inch increase in static
  pressure across coil.