[labnetwork] longevity of N2 purifiers

[Brian Little]

Another option would be to install a hygrometer downstream and measure the
dewpoint. If the purifier has a bypass manifold you can see if the dewpoint
gets any worse when the purifier is bypassed.

On Thu, Feb 13, 2025 at 2:28 PM Kyle Keenan <kckeenan at seas.upenn.edu> wrote:

> Hi Brian,
>
> Thanks for the suggestion. Unfortunately, calculating the flow accurately
> is virtually impossible. We share the LN2 supply with the entire building,
> so even if we knew the total usage for the building, we'd have no way of
> knowing how much of that is ours.
>
> Best,
> Kyle
>
> On Thu, Feb 13, 2025 at 2:09 PM Brian Little <bdlittl2 at ncsu.edu> wrote:
>
>> Hi Kyle,
>> I would recommend checking with your vendor or any other purifier vendor.
>> They have spreadsheets that they can type the purity and flow into that
>> will estimate an approximate lifetime for a given bed size and material.
>> Brian
>>
>>
>> On Thu, Feb 13, 2025 at 1:28 PM Kyle Keenan <kckeenan at seas.upenn.edu>
>> wrote:
>>
>>> Hello All,
>>>
>>> Our cleanroom has been in operation for 11 years and, for high purity
>>> N2, we use local purifiers. Given their age, I'm starting to wonder if/when
>>> they might need to be replaced. I've looked into it, and doing so would be
>>> quite costly. I know there are a ton of variables at play, but generally
>>> speaking, for an 11,000 sq/ft facility that uses UPN2 on, perhaps, 15-20
>>> pieces of research equipment and for N2 guns at ~15 wet benches, what would
>>> be your expectation? Is this something we even need to worry about?
>>>
>>> I'd be interested to read your thoughts.
>>>
>>> Best,
>>>
>>
>>> --
>>> Kyle Keenan
>>>
>>> Senior Manager - Laboratory Operations
>>> Quattrone Nanofabrication Facility
>>> University of Pennsylvania
>>> P: 215-898-7560
>>> F: 215-573-4925
>>> _______________________________________________
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>>>
>>
>
> --
> Kyle Keenan
>
> Senior Manager - Laboratory Operations
> Quattrone Nanofabrication Facility
> University of Pennsylvania
> P: 215-898-7560
> F: 215-573-4925
>
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