Old 08-18-2012, 01:30 AM #17
CCC CCC is offline
Junior Member
 
Join Date: Aug 2012
Posts: 15
Rep Power: 0
CCC can only hope to improve
CCC CCC is offline
Junior Member
 
Join Date: Aug 2012
Posts: 15
Rep Power: 0
CCC can only hope to improve
Default Re: You're gonna want to see this

Quote:
Originally Posted by flare09 View Post
I am going to just 'wet' some distilled water with either glycol or isopropyl.
The only reason you would need to do that is for corrosion resistance in a steel radiator. If you use copper, you don't need to worry about corrosion as long as you use distilled water and acid-clean copper. If you can't do that, then use phosphor bronze instead of copper. Phosphor bronze should be more than adequate for corrosion resistance, even at modestly elevated temperatures.


CCC is offline   Reply With Quote


















Old 08-18-2012, 03:42 AM #18
Class 1M Laser
 
Join Date: Oct 2011
Posts: 173
Rep Power: 9
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
flare09 flare09 is offline
Class 1M Laser
 
Join Date: Oct 2011
Posts: 173
Rep Power: 9
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
Default Re: You're gonna want to see this

Well im using aluminum everything. I considered switching to copper because its easier to seal by solder then aluminum by alumaweld. In which case I could move to higher pressure system to get that phase change going. But I would then have to rebuild my radiator, its aluminum.

I know you can't mix metals in a system, they will corrode eachother. And I want to use them to lower the surface tension in the water, it will help it stick to walls inside, fill in those microscopic scratches and better conduct heat. I kinda want this to be a sealed, no fluid change out every year.
flare09 is offline   Reply With Quote
Old 08-18-2012, 09:28 AM #19
Cel's Avatar
Cel Cel is offline
Class 2M Laser
 
Join Date: Jan 2012
Location: Croatia
Posts: 743
Rep Power: 10724
Cel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond repute
Cel Cel is offline
Class 2M Laser
Cel's Avatar
 
Join Date: Jan 2012
Location: Croatia
Posts: 743
Rep Power: 10724
Cel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond reputeCel has a reputation beyond repute
Default Re: You're gonna want to see this

Why do you want to use that complex heatsinks, when the current ones are good enough, and pretty cheap.

Well, you can experiment with that, but Hg can dissolve some metals, it is a bad idea to put galvanic metals together...
Why complicate when you already have a decent heatsink? If you need more heatsinking, make it bigger, or even labby-style.

Last edited by Cel; 08-18-2012 at 09:34 AM.
Cel is offline   Reply With Quote
Old 08-18-2012, 10:12 AM #20
CCC CCC is offline
Junior Member
 
Join Date: Aug 2012
Posts: 15
Rep Power: 0
CCC can only hope to improve
CCC CCC is offline
Junior Member
 
Join Date: Aug 2012
Posts: 15
Rep Power: 0
CCC can only hope to improve
Default Re: You're gonna want to see this

Yes, mixed metals can corrode each other in a galvanic reaction, but that's not what I'm talking about when I warn you against mixing gallium and or mercury with aluminum. Within seconds, your aluminum will crumble to dust with the mercury. Within minutes, your aluminum will be as fragile as paper with the gallium. It's not mere corrosion, it's near-instant catastrophic destruction. With the mercury, it's obvious. With the gallium, everything will look fine until you poke it with your finger and it falls apart.

The other metal to avoid is tin, if you use active refrigerated cooling. The cold will cause a phase change in the tin, and it will crumble to dust too, right before your eyes. That's something to be aware of when you choose your solder, since most of them contain anything from pure tin to an alloy.

Also be aware that heating and cooling will cause whiskers to form in many metals. Those can cause an explosion in your batteries, or some other unpleasant effect. The size of some lithium batteries in use here is big enough to zip off fingers if they explode while you're gripping your device. Hopefully you're wearing eye protection so you don't need to worry too much about shrapnel.

I always use a face shield in addition to eye protection if I'm doing something that has even a small chance of going badly. It has save my face and my eyes more times than I can count.
CCC is offline   Reply With Quote
Old 08-18-2012, 10:19 AM #21
Class 3R Laser
 
Join Date: Jun 2007
Posts: 1,772
Rep Power: 222992
steve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond repute
steve001 steve001 is offline
Class 3R Laser
 
Join Date: Jun 2007
Posts: 1,772
Rep Power: 222992
steve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond reputesteve001 has a reputation beyond repute
Default Re: You're gonna want to see this

Fluorinert any one ?
steve001 is offline   Reply With Quote
Old 08-18-2012, 01:40 PM #22
Class 1M Laser
 
Join Date: Oct 2011
Posts: 173
Rep Power: 9
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
flare09 flare09 is offline
Class 1M Laser
 
Join Date: Oct 2011
Posts: 173
Rep Power: 9
flare09 has a spectacular aura aboutflare09 has a spectacular aura aboutflare09 has a spectacular aura about
Default Re: You're gonna want to see this

well i suppose that does throw out that optioin.

and whiskers arent too much to worry about. granted i do have a phase change system in place, it wouldnt be very efficient and probably only cool a few degrees. and it would be like any other short, im using protected LiFe so they are a little more stable than other lithium chemistry batteries
flare09 is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 07:50 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC