Why negative pressure direct to the chip data center liquid cooling.

Chilldyne spun out of Flometrics, an engineering consultancy that specializes in thermodynamics and fluid dynamics in 2012. Flometrics designed cooling systems for electronics, lasers, aircraft, rockets, and medical devices. When we were faced with the data center cooling problem, we used our experience to come up with the best solution. We had optimized an oil immersion cooling system for high voltage electronics, and knew it to be messy and inefficient. We developed an ammonia two phase system for a rocket propulsion system and knew it to be sensitive to pressure and orientation and hard to predict.

The most difficult heat transfer problem is cooling a liquid rocket nozzle. Every liquid rocket uses extra fuel along the nozzle walls to prevent the nozzle from melting, so better cooling means better fuel economy and more payload. A lot of time and money has been spent on this problem all over the world for 65+ years, so the technology is mature. ?Our helical path forced convection heat transfer approach is based on the Rocketdyne vernier rocket nozzles that we have tested and flown over the years.

Any liquid system that includes disconnection points that are serviced regularly is going to leak eventually. O-rings degrade, dirt gets in and parts corrode. This is why we chose to use negative pressure. Leaks happen in Chilldyne systems, but they don’t cause downtime. ?As servers get more expensive, leaks become unacceptable and negative pressure is the right choice.