Re: [PSUBS-MAILIST] scrubber

[Jon Wallace <jonw@psubs.org>]

Vance,

Air volume, velocity, and resistance are the important factors.  There's 
plenty of data on the web regarding the absorption capacity of various 
products (sofnolime, sodasorb, etc) which means for a given volume of 
the material you can easily calculate the duration of the chemical based 
upon the amount of CO2 being expelled.  The harder parts are 
anticipating and dealing with the dynamics such as packing of the 
material, size of the material, and the absorption latency of the 
material.  Sodasorb, sofnolime, etc comes in different mesh sizes and 
has to be "packed" into the housing.  Too tight and you restrict air 
flow too much.  Too loose and you allow air to escape that has not been 
cleaned.  In terms of air velocity, you have to be careful not to have a 
fan that pushes the air too quickly or it won't spend enough time on the 
chemical (latency) to get cleaned.  There are a lot of factors to 
consider which for a home built unit means testing to see how it 
performs.  Specifics are important here, so when you find something that 
works let us know exactly how it was built, what kind of fan, airflow 
(cu ft/min), etc.

Jon


vbra676539@aol.com wrote:
> Dan,
> We ought to contact the guy and find out about breathing pressure. If 
> he is using it to breathe through then we ought to have no trouble 
> adapting it for fans. Maybe one or even two boxers stacked will move 
> pretty good air. They're cheap and quiet, so it shouldn't be too much 
> trouble. We'll need to conact Soda Sorb or somebody and get the info 
> on absorption rates and so on.
> Vance




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