[labnetwork] DI costs - DIW maintenance

[Robert M. Hamilton]

Matthieu Nannini,

To open the dialogue parameters for your system are needed:
1) What' the analysis of the water you are starting with?
2) How much RO makeup are you using and what is the makeup's 
final resistivity (conductivity)?
3) What is your DI spec? The desired total-silica value 
partly determines the polishing bed performance. It is the 
first breakthrough product.
4) What's the DI loops recirc. gpm?
5) How many polish beds are in use and are they in a 
lead/lag configuration?
6) Do you blanket your DI reservoir with N2?
7) How much DI is being removed from the loop?

Berkeley can share our numbers but we need to compare the 
systems specs. Regrettably, the costs don't scale with 
system size.

Bob Hamilton

Bob Hamilton
Marvel NanoLab
University of CA at Berkeley
Rm 520 Sutardja Dai Hall
Berkeley, CA 94720-1754
bob at eecs.berkeley.edu
(e-mail preferred)
510-809-8600
510-325-7557 (mobile - emergencies)

On 9/28/2012 10:46 AM, Matthieu Nannini, Dr. wrote:
> Dear colleagues,
>
> Reviewing my annual costs and trying to find places where I could save money I realized that one of my main maintenance expense was on DIW. I pay about 10,000$/y to a contractor that is doing monthly and annually maintenance on the mixed bed and anionic cylinders. I have full confidence in this contractor and I don't have to worry about the DIW plant. However, everytime I issue a PO I can't help but thinking it's quite expensive.
>
> I'd like to know if I'm in the normal range or not.
>
> Thanks
>
> Matthieu
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