technogiant
Limp Gawd
- Joined
- Aug 17, 2009
- Messages
- 181
High guys....just thought I'd link you to my latest project.
It's an evolution of my previous chill box build...but this time....well where do I start.
The chamber is basically like a huge actively cooled vapor chamber with the motherboard submerged in the bottom of the chamber in the working fluid which is liquified gas.
...perked your interest?
Here's a youtube link to the web cam footage from inside the chamber.
http://www.youtube.com/watch?v=ZUVWAdSnYuw
So the chamber is completely sealed and made of 1.5cm alu plate as it has to withstand negative pressures of -10psi.
The evaporator of my 3.6kw air con unit is sealed inside the chamber and the chamber is filled with the gaseous refrigerant.
When you turn the ac unit on the temp drops, liquifies the vapor causing a partial vacuum which is used to draw liquified refrigerant from a pressure bottle into the chamber sump where the pc mobo becomes submerged.
So the mobo is submerged in liquified refrigerant....the refrigerants boiling point at normal temp and pressure is -1c but because the cold in the chamber is causing a pressure drop the liquid boiling point also drops.....in fact the liquid is in a state of equilibrium balanced right on the edge of a variable boiling point the value of which depends on the pressure/temperature of the chamber.......you can see this in the video...the liquid is in a constant bubbling state even with no load...like a witches cauldron. The lowest temp the chamber produces is about -30c.
The components are cooled by the liquid phase changing...this is where it's good to have the liquid on the edge of liquid/vapor equilibrium as it's always ready to boil off given a heat input.
I have to contain the liquid in a pressure cylinder between uses as the chamber was not designed to withstand expansive pressure...just compressive pressure.
So I basically reverse the filling process.....the cylinder is place in a chest freezer so causing a low pressure inside....the chamber cooling is turned off and as it warms the liquid is transferred across through a linking pipe because of the pressure differential.
You like.....I think this is a first....
It's an evolution of my previous chill box build...but this time....well where do I start.
The chamber is basically like a huge actively cooled vapor chamber with the motherboard submerged in the bottom of the chamber in the working fluid which is liquified gas.
...perked your interest?
Here's a youtube link to the web cam footage from inside the chamber.
http://www.youtube.com/watch?v=ZUVWAdSnYuw
So the chamber is completely sealed and made of 1.5cm alu plate as it has to withstand negative pressures of -10psi.
The evaporator of my 3.6kw air con unit is sealed inside the chamber and the chamber is filled with the gaseous refrigerant.
When you turn the ac unit on the temp drops, liquifies the vapor causing a partial vacuum which is used to draw liquified refrigerant from a pressure bottle into the chamber sump where the pc mobo becomes submerged.
So the mobo is submerged in liquified refrigerant....the refrigerants boiling point at normal temp and pressure is -1c but because the cold in the chamber is causing a pressure drop the liquid boiling point also drops.....in fact the liquid is in a state of equilibrium balanced right on the edge of a variable boiling point the value of which depends on the pressure/temperature of the chamber.......you can see this in the video...the liquid is in a constant bubbling state even with no load...like a witches cauldron. The lowest temp the chamber produces is about -30c.
The components are cooled by the liquid phase changing...this is where it's good to have the liquid on the edge of liquid/vapor equilibrium as it's always ready to boil off given a heat input.
I have to contain the liquid in a pressure cylinder between uses as the chamber was not designed to withstand expansive pressure...just compressive pressure.
So I basically reverse the filling process.....the cylinder is place in a chest freezer so causing a low pressure inside....the chamber cooling is turned off and as it warms the liquid is transferred across through a linking pipe because of the pressure differential.
You like.....I think this is a first....