[labnetwork] Exhaust and makeup air systems

[Manish Keswani]

Thank you everyone for your response on this topic. Per your
recommendation, I have emailed a few other facilities and hope to hear back
from them soon. We will be looking into a feedback control system between
the fan speed and the state of the gas cabinets/solvent wet stations that
could reduce the requirements of the FHE/makeup air unit.  Look forward to
engaging with our ESH team and working on this project.

Regards,
Manish

On Tue, Sep 15, 2020 at 8:17 AM Manish Keswani <manish.keswani01 at gmail.com>
wrote:

> 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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