Heatsink full of Liquid Nitrogen no Fan - Page 2

Predator · 8th May 2002, 11:56 PM

Radiation

PrawnStar · 8th May 2002, 11:56 PM

yeah i know this. I was just pointing out a reason as to WHY it is so stupid...

PrawnStar · 8th May 2002, 11:59 PM

Quote:

Originally posted by awinner
Heat doesnt pass through vacuum? How does the heat from the sun get to us then?

There is nothing in a vacum to be heated hence heat does not transfer through a vacum, rather radiation creates heat as predator said.

sciencewhiz · 9th May 2002, 12:07 AM

Heat transfers through a vacuum by radiated, or radiant heat energy.
It just doesn't travel by convective means.
Try it this way.
Short wavelength heat, travels through things like your car window, and makes long wavelength heat inside your car....

Liquid Nitrogen in transported in high pressure containers. Most often the end use types.
Do a google search on liquid nitrogen manufacture and see what you come up with.

awinner · 9th May 2002, 12:15 AM

Quote:

Originally posted by PrawnStar

There is nothing in a vacum to be heated hence heat does not transfer through a vacum, rather radiation creates heat as predator said.

There are 2 forms of heat transfer conductive heat transfer (which cant happen in a vacuum) and radiative heat transfer which can. Radiative heat transfer is when objects transfer heat between each other through elctromagnetic radiation.

Mind you this is getting off topic a bit.

PrawnStar · 9th May 2002, 12:20 AM

ok i stand corrected then....and i think we have well and truly proved that a heatsink with a pocket of LN is not feasable.

sciencewhiz · 9th May 2002, 12:26 AM

Quote:

Originally posted by awinner

Radiative heat transfer is when objects transfer heat between each other through elctromagnetic radiation.

Mind you this is getting off topic a bit.

Electromagnetic radiation. OOOOKAAAYYYYY....
I think you need to do a little bit more research than that....

MCWB · 9th May 2002, 12:41 AM

Quite simply the idea is just complete bollocks.

I CBF putting the reasons down as it's just silly, check out some thermodynamics and you'll soon find out why it's just stupid

Iceman · 9th May 2002, 6:58 AM

It absolutally wouldnt work. LN2 isnt a magical 'stay cold' substance

I havent actually played with it too much, but I theorise that if you poured it into a heatsink and then sealed it, the heatsink would either become brittle and the pressure of the LN2 turning into a gas would cause it to explode. (Think, what happens to water when you boil it, LN2 boils at (-195.8 ° C))

Even if you could manage to find something that kept the LN2 contained, it would eventually warm up anyway, Im unsure exactally what chemical reaction would of taken place for this to happen but Im sure one would

MSDS

Shepete · 9th May 2002, 10:53 AM

The only reason liquid Nitrogen cools anything is because it boils off. If you stop it boiling, eg, pressurised. It will stabilise at the ambient temperature. You can do the same thing with a bbq gas bottle. If you take a cylinder of gas , the liquid gas is at ambient. If you open the valve for a few seconds, you will get a layer of ice around the outlet. Thats how fridges work.

stewpot · 9th May 2002, 11:19 AM

Quote:

Originally posted by sciencewhiz

Electromagnetic radiation. OOOOKAAAYYYYY....
I think you need to do a little bit more research than that....

More research. OOOOKAAAYYYYY....

The Sun is the classic example of a black body radiation source. So how does the Sun's energy reach us through the vacuum of space?
I checked http://www-astronomy.mps.ohio-state...._1/notes2.html

Quote:

Heat a black body. A black body is an object which absorbs all the light which strikes it. (A star is an approximation to a black body).

When a black body is heated, it emits a continuous spectrum of electromagnetic radiation.

PrawnStar · 9th May 2002, 12:14 PM

heheh

NforSa · 9th May 2002, 12:47 PM

hmmm m8 electromagnetic and the radiation that heats up the earth is a LOT different !!!
!!!

sciencewhiz · 9th May 2002, 1:48 PM

Quote:

Originally posted by stewpot

More research. OOOOKAAAYYYYY....

The Sun is the classic example of a black body radiation source. So how does the Sun's energy reach us through the vacuum of space?
I checked http://www-astronomy.mps.ohio-state...._1/notes2.html

It's a bastard when even the web gives you wrong info.
Keep digging...

maddhatter · 9th May 2002, 2:21 PM

Quote:

Originally posted by saba

K = C + 273

I was pretty close come on!

only 16 degree's out, what does it matter it's still fricken cold

8th May 2002, 11:56 PM	#17
PrawnStar Member Join Date: Jun 2001 Location: Sydney Posts: 389	yeah i know this. I was just pointing out a reason as to WHY it is so stupid... __________________ Dwight - "I've heard alcohol makes you stupid...." Fry - "No I'm.... doesn't...." - Futurama

9th May 2002, 12:07 AM	#19
sciencewhiz Member Join Date: Jun 2001 Location: Canberra Australia Posts: 2,528	Heat transfers through a vacuum by radiated, or radiant heat energy. It just doesn't travel by convective means. Try it this way. Short wavelength heat, travels through things like your car window, and makes long wavelength heat inside your car.... Liquid Nitrogen in transported in high pressure containers. Most often the end use types. Do a google search on liquid nitrogen manufacture and see what you come up with. __________________ Life can be tough, it can be a lot tougher if you're stupid...... Overclockers Australia Forums > User Control Panel For sciencewhiz > Edit Options> Show user's signatures in their posts? = NO

9th May 2002, 12:20 AM	#21
PrawnStar Member Join Date: Jun 2001 Location: Sydney Posts: 389	ok i stand corrected then....and i think we have well and truly proved that a heatsink with a pocket of LN is not feasable. __________________ Dwight - "I've heard alcohol makes you stupid...." Fry - "No I'm.... doesn't...." - Futurama

9th May 2002, 12:41 AM	#23
MCWB Member Join Date: Dec 2001 Location: Sydney Posts: 4,905	Quite simply the idea is just complete bollocks. I CBF putting the reasons down as it's just silly, check out some thermodynamics and you'll soon find out why it's just stupid __________________ P4 2.8C @ something GHz, EPoX 4PCA3+, 2 X 512 MB Kingston HyperX 3500, 9800 Pro OCAU Extreme Cooling Club Phase Change Member

9th May 2002, 6:58 AM	#24
Iceman Member Join Date: Jun 2001 Location: Brisbane (nth), Australia Posts: 6,304	It absolutally wouldnt work. LN2 isnt a magical 'stay cold' substance I havent actually played with it too much, but I theorise that if you poured it into a heatsink and then sealed it, the heatsink would either become brittle and the pressure of the LN2 turning into a gas would cause it to explode. (Think, what happens to water when you boil it, LN2 boils at (-195.8 ° C)) Even if you could manage to find something that kept the LN2 contained, it would eventually warm up anyway, Im unsure exactally what chemical reaction would of taken place for this to happen but Im sure one would MSDS __________________ _,ø¤°`°¤ø,¸_¸,ø¤°`°¤ø,¸_¸,ø¤°`°¤ø,¸_ WTB: Cisco 1801-M PM me Please rehash my posts and pass them off as your own ideas! Triple points for doing it in the same page of the thread. Plagiarism is the sincerest form of copyright infringement.

9th May 2002, 10:53 AM	#25
Shepete Member Join Date: Jun 2001 Location: Bendigo Posts: 1,704	The only reason liquid Nitrogen cools anything is because it boils off. If you stop it boiling, eg, pressurised. It will stabilise at the ambient temperature. You can do the same thing with a bbq gas bottle. If you take a cylinder of gas , the liquid gas is at ambient. If you open the valve for a few seconds, you will get a layer of ice around the outlet. Thats how fridges work. __________________ I am not young enough to know everything.

9th May 2002, 12:14 PM	#27
PrawnStar Member Join Date: Jun 2001 Location: Sydney Posts: 389	heheh __________________ Dwight - "I've heard alcohol makes you stupid...." Fry - "No I'm.... doesn't...." - Futurama

9th May 2002, 12:47 PM	#28
NforSa Member Join Date: Jun 2001 Location: Melbourne Posts: 2,334	hmmm m8 electromagnetic and the radiation that heats up the earth is a LOT different !!! !!! __________________ E3110 @ 4ghz /1.248v/ Noctua NH12 / Lian Li V1000B+ / 3.5tB / P5K-PRO / 4gb 1066DDRII / 8800GT ICQ: 39197814 / MSN: doogs40@hotmail.com