Two-phase Immersion Cooling

How the Two-phase Immersion Cooling Works

November 27, 2015

What is Two-Phase Immersion Cooling?

When it comes to comercial two-phase Immersion Cooling one of the of few names in the market is Allied Control. Their description of two-phase Immersion Cooling is:

"In a two-phase immersion cooled system, electronic components are submerged into a bath of dielectric heat transfer liquids, which are much better heat conductors than air, water or oil. With their various low boiling points (ie. 49°C vs. 100°C in water), the fluids boil on the surface of heat generating components and rising vapor passively takes care of heat transfer.
It is this simplicity that eliminates conventional cooling hardware and results in better cooling efficiency. Compared to traditional air, water or oil cooling, this passive process results in the use of much less energy."

It is this simplicity that eliminates conventional cooling hardware and results in better cooling efficiency. Compared to traditional air, water or oil cooling, this passive process results in the use of much less energy.

This basically means that the coolant employed changes state. During that change of state it takes the heat to the top of the tank in a gasified form. Through a condensing coil the gas is cooled-off and rains down in the form of liquid back into the pool of coolant to start the process again.

The clear advantages are that there's no need for coolant pumps (of course the water pumps / cooling towers are still required) and that hardware can be easily re-used as the coolant is quickly evaporated in ambient atmosphere.

The main disadvantages are the elevated price of the two-phase coolant (which makes this solution financially non-viable for the standard Data Center) and the high-volatility of the coolant in gas form. Although Allied Control claim that their coolant is "environmentally friendly", the 3M Novec solution that they use is a mineral-based oil (so, petroleum-based) and 3M only gives us a hint by stating on their product page "low global warming potentials".

At Submer we're designing our solution based on single-phase Immersion Cooling for two main reasons:

  1. Biodegradable coolant (human and environment hazardous free) and compatible with fiber optics.
  2. Price point of the solution that allows any size Data Center to seriously consider Immersion Cooling as the de-facto solution for server cooling (ROI < 1 year).

Submers' target Customers are the worlds data centers that don't want to move their infrastructure to cold climates (mainly because of end-customer proximity and local security policies) and still need to compete with the Big Boys of the market.

It is also the perfect solution for high density applications like blockchain, HPC, Deep Learning and Cryptocurrency mining (Bitcoin, Etherium, Ripple, Litecoin, etc.) using any ASIC or GPU hardware.

Contact us to reduce your costs now.