Re: Water re-circulators

Mike

This does not strike me as a very viable solution for the general flow 
facility.  I just ordered a Coherent LaserPure 60 (60KW) for $8,325.  This 
will cool 2 Innova 90 and equivalent lasers.  I don't know where your 
numbers for a 20KW chiller for $15,000 came from but obviously Coherent can 
supply at about half that price and 4 times less than your quoted price of 
$40K for a 60KW.  Thus while I certainly see how your big unit is 
economical for your setup it is much too expensive for the general user 
especially considering the need 460V (the Coherent 60 runs on 208).  Most 
labs would not likely need to cool more than 2 lasers.	If someone needs to 
cool more than 4 Innova 90/300 series or equivalents then your system seems 
like the way to go.

Larry

At 07:09 AM 8/28/2004 -0500, you wrote:
>Hi Cytometry Folks,
>
>Relating to Water Chillers...
>
>As you are aware, I am running multiple MoFlo sorters.  Although I have
>modified them to run two MoFlo side by side and the laser mounted between
>them and mirror imaged the systems, I need only one laser to operate two
>systems.  Still, I have 4 Innova 90 lasers and 1 new technology pulsed, air
>cooled 355nm Vangaurd laser.  The issues of water temperature here in the
>south as Dr. Hester states is a real problem when running single or multiple
>lasers.
>
>My solution to the problem was self contained chillers.  Cost was rediculous
>when looking at housing a facility for 12 sorters and at the time, planned
>for 1 laser each system.  Therefore, my building is somewhat constructed
>with the pipes and plumbing to handle 12 lasers and a loop system that is
>setup for four 60kW chillers to be added sequencially as we fill the room
>with sorters.	Costs for one chiller for one laser (20kW) was in the area of
>$15,000 and 60kW chillers in the $40,000 range but this is because of the
>recommended tight tolerance of the temperature control.  This would have
>cost me $120.000.00 for enough chillers to handle the facility.
>
>Then, my due diligence told me there has to be a better way.  I then
>searched out a company that produces chillers for wineries.  I went to
>Houston and watched the manufacture of a 60kW chiller system and was quite
>impressed with the quality and workmanship.  That 60kW chiller system cost
>me somewhere around $20,000 delivered and Installed.  I have never worked
>with a better company!!!!  It has an 80 gallon reservoir and has been
>operating since last November 19 hours per day and has not flinched.  It
>does not have as tight of a tolerance as those "made for laser chillers" but
>we are sorting sperm that are less than 4.0% difference between male and
>female, runnning multiline UV at 150mW and in linear at gain 16 and the
>system is quite stable.
>
>The unit is an outside unit and runs on 460 so we installed a step up
>transformer from 208 to 460V.
>
>To me, there is no better way to run your lasers and it is very low cost as
>compared to the Coherent LP60 or any of the "made for laser" chillers and I
>dont thow away water at 3.0 gallons per minute to cool the heat exchangers.
>
>Information is below on how to contact them.  Please, if you contact them,
>let them know that I referred you.
>
>good luck,
>
>Mike
>
>
>(713) 462-2500 & (800) 473-9178  Contact Mike Marrone at
>mmarrone@waterchillers.com
>
>
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Larry W. Arnold, Ph.D.
Research Professor  and Director, Flow Cytometry Facility
Department of Microbiology and Immunology
Lineberger Comprehensive Cancer Center
CB# 7290
University of North Carolina at Chapel Hill
Chapel Hill, NC 27599
Phone: 919-966-1530
FAX: 919-962-8103