[labnetwork] Exhaust and makeup air systems

[Jeff Salzmann]

Manish,

DI water foggers are useful for this sort of work. I made video recordings at different exhaust rates and used them to determine the rates I needed.

Jeff

From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> On Behalf Of Manish Keswani
Sent: Tuesday, September 15, 2020 11:18
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] Exhaust and makeup air systems

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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