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Gold/Mining/Energy : Zentek Ltd.
ZEN.V 1.170-0.8%Nov 7 9:30 AM EST
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To: Candu who wrote (41057)1/4/2023 9:25:36 AM
From: Reflection13 Recommendations   of 54012
 
Perhaps the most important part of Leppin's comments are these:

"This shouldn't be surprising given the fact that OEMs ensure that the filter manufacturers meet their specifications. However, the use of high efficiency filters comes with a price. These HEPA filters have an extremely high pressure drop (134 to 412 Pa). This, in turn, increases fuel burn as the recirculating fans have to work hard to drive the required airflow through the filter and back to the aircraft cabin. To reduce the pressure drop, the authors suggested the use of nanofiber media to replace glass fiber media. In their tests, the authors tests found that the filter material change pressure drop was reduced from 84.7 Pa/(cm/s) to less than 28.5 Pa/(cm/s). There are some challenges to using nanofiber media as it would need to formulated to ensure they do not post a fire and smoke risk."

High level Hepa filters in aircraft require additional fuel burn to push air through them. It is suggested utilizing a nanofiber material will be much more efficient. The downside is with nanofibers there is a challenge (risk) of smoke and fire. Who has been working on fire retardants? Who has close ties to producers of nanofibers?
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