How to select a mechanical filter using PM figures
How to select a mechanical filter using PM figures
(OP)
Folks-
I need to control the incoming (dry ) air provided to cool a hydrogen fuel cell and the cleanliness of the air is stated as follows:
Fine particles (PM 2.5)<20 micrograms/cubic-meter
Coarse particles (PM 10)<50 micrograms/cubic-meter.
where PM stands for Particulate Matter and the 2.5 and 10 refer to the aerodynamic diameters of the particles in microns.
I passed this reqt on to an air filter mfgr and they didn't know what to make of it. Can anyone out there provide some direction on this? If a major air filter mfgr can't figure it out how am I supposed to? I appreciate all inputs!
Thanks!
I called an air filter company and they didn't know what to make of this.
I need to control the incoming (dry ) air provided to cool a hydrogen fuel cell and the cleanliness of the air is stated as follows:
Fine particles (PM 2.5)<20 micrograms/cubic-meter
Coarse particles (PM 10)<50 micrograms/cubic-meter.
where PM stands for Particulate Matter and the 2.5 and 10 refer to the aerodynamic diameters of the particles in microns.
I passed this reqt on to an air filter mfgr and they didn't know what to make of it. Can anyone out there provide some direction on this? If a major air filter mfgr can't figure it out how am I supposed to? I appreciate all inputs!
Thanks!
I called an air filter company and they didn't know what to make of this.
Tunalover





RE: How to select a mechanical filter using PM figures
I would just assume the "aero diameter" is equal to the true particle diameter and go from there; but would also make that assumption very clear to the end user.
RE: How to select a mechanical filter using PM figures
http://en.wikipedia.org/wiki/Hepa