[labnetwork] Exhaust and makeup air systems

[Manish Keswani]

Dear all,


We are currently evaluating our exhaust and makeup air systems at LLNL and
looking into ways that will improve the efficiency and/or optimize the flow
rates so that lower CFM is needed. Our solvent stations/wet benches and gas
cabinets use about 50% and 25% of exhaust, resp.



It seems that one may be able lower the exhaust needs by optimizing the
exhaust flow during opening/closing of the gas cabinet doors or fume hood
sash using suitable sensors or by determining the actual flow using tracer
gas testing, which could be up to 50% lower than the standard flow.



Does anyone have any experience with this and suggestions on how to
approach this?


Thanks in advance.


Regards,

Manish


Manish Keswani

Center for Micro and Nano technology

Lawrence Livermore National Laboratory
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