Looking for "really cold" chiller, please help.

[Sub-zero]

Hello out there. This is my first post. I have an engineering problem and since I am not in the refrigeration industry I thought I could find some answers here.

I am looking for a chiller that can bring a fluid from +25 deg F down to -60 deg F, through a heat exchanger.
Specific heat of the fluid is around 0.45 Btu/lb.F
Flow is 4600 pph
It is also possible to have the fluid starting temp at -40 deg F but I am not sure if that makes any difference once we get down below -20F.

The chiller vendors that I have spoken to tell me that this is a non-standard application and that chillers have difficulty getting below -20 deg F.

Are there companies that specialize in creating systems for this type of "extreme" cold operation?

Any help would be appreciated!

Thanks

[bruceboldy]

In your description you mention 4600 pph can you explain a bit more is that lbs per hour??
Low temp is a specialty business,
but there are plenty of good companies to build what you need.
The only difficulty i see is the possible viscosity of the liquid at low temps and the very wide inlet and outlet temps required. This will take some special heat exchanger design expertise.

Contact me if you need specifics.
best of luck
Bruce

[Peter_1]

SI units between brackets please.I can't read your post

[Buckiesr]

I once worked for a firm that had a system designed using ammonia in one side and a mixture of calcium chloride (commercial Ice-melt)and water on the other of the chiller. We circulated it with pumps having Stainless Steel impellers and suction rings. We consistently maintained -50 all day long through a series of mixing units that were originally designed to mix gun powder. When you mix ice melt and water the chemical reaction causes the water to get really hot. Everything has to be able to handle the strong brine concentrated solution. only add enough water to dissolve the ice-melt to a liquid.
WM

[Sub-zero]

Thanks for the replies!

Bruce, the 4600 pph is pounds per hour or (0.579 kg/s)

Viscosity is a concern but I don't know of a better way to control the temperature. The purpose of this system will be to achieve and maintain a viscosity of 12 centistoke, which occurs around -55 deg F. (-48.3 C)

I'll throw another wrench into the mix. This needs to be a semi-portable system. Something we can move around to different testing sites pretty easily.

[jwasir]

Hi,

Can I have your contact #.

We are from Ont, canada and would like to talk to you for more details.

[Sub-zero]

that would be great, my number in Mississauga:

905-564-7500 ext 6-7595

[Sub-zero]

Bruce, how can i contact you?

[TXiceman]

A couple of companies to call are:
Cimco in Toronto
and
RAE Corporation in Pryor, OK.

Otherwise email me at ke5dfr@sbcglobal.net and I can get someone to help you.

[bruceboldy]

hi sub zero

get me at dboldrick@trane.com Both i and the texas ice man can help you out .

regards

bruce

[petrock]

Hi Sub zero,, You can also try AUSTCOLD but they are probably a bit too far for you. Their in Sydney, Australia.

[Peter_1]

http://www.ftssystems.com/ultracool.htm

[ntfreezer]

www.worldbase.cn

[TXiceman]

Did you ever get your problem solved......

Nice to post so others and learn from your questions.

Ken

[Sledge]

If you didnt get your problem solved, contact Cascade Mechanical in Caledon (just north of Mississauga). They specialize in this kind of work.

[wilsoncheung]

The R404A system may solve your problem.