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Waterless liquid cooling for electronic hardware

DirectJet Technology is a waterless liquid cooling technology that harnesses phase change heat transfer with a dielectric fluid to ensure safe and effective cooling of electronic devices.

Compact and durable, DirectJet cooling modules can be packaged in nearly any application, ranging from high-performance servers to vehicles to medical imaging systems. DirectJet Technology is revolutionizing the way electronic devices are designed and deployed.

Image of an Ebullient DirectJet Module


What sets DirectJet cooling systems apart from other liquid cooling systems?




ebullient-hex-logo  Waterless

DirectJet systems circulate an engineered fluid that, unlike water, does not conduct electricity and poses no risk to hardware. This makes DirectJet systems ideal for cooling sensitive electronics, such as computer processors and memory.




ebullient-hex-logo   Universal

DirectJet Module Loops are universal, meaning they can cool any server, regardless of make or model. Module Loops can be adapted to any server layout and are compatible with devices from the following major manufacturers, as well as many others:




ebullient-hex-logo   Uniform temperatures

In competitors’ systems, fluid warms as it flows from device to device, causing all devices to operate at different temperatures, which may affect performance and longevity. In DirectJet systems, the fluid is maintained at its saturation temperature, resulting in uniform operating temperatures for all devices.

Image of temperature uniformity comparison between Ebullient DirectJet Module Loops and competitors' loops



ebullient-hex-logo   Cool many devices in series

DirectJet Module Loops can remove up to 2,000 W of heat per loop, allowing them to cool up to eight 250 W processors in series.  This makes DirectJet Module Loops ideal for high-performance computing (HPC) applications with multiple graphics cards per server.






Other Benefits

DirectJet systems are easy and affordable to operate.



ebullient-hex-logo   Low expenses

On average, data centers with Ebullient cooling systems enjoy a 75% reduction in cooling costs compared to air-conditioning alone. And for new data center builds, choosing Ebullient cooling systems can significantly reduce capital costs and facility complexity, compared to air cooling alternatives.



ebullient-hex-logo    High server density

With DirectJet cooling systems, you can install more servers per rack, since gaps between servers for airflow are not needed.  For most customers, this means consolidating two or three racks into one and freeing up floor space for future expansion.  Often, this means avoiding large capital expenses associated with constructing new data center space.



ebullient-hex-logo    Scalable

DirectJet cooling systems have a modular design that allows you to add cooling rack by rack as your facility grows.  This approach provides cooling where you need it, when you need it.



ebullient-hex-logo    Reliable

DirectJet cooling systems have only one moving part, a time-tested industrial grade pump, making them extremely reliable.



ebullient-hex-logo    Low maintenance

Systems are fully sealed, so you never have to add or treat fluid during the life of the system. All systems include remote monitoring systems, making it easy for IT staff to monitor system performance.



ebullient-hex-logo    Quiet

Ebullient cooling systems remove server heat from your data center using quiet, centrifugal pumps.  This allows noisy air conditioners and server fans to be turned down or off and allows the temperature within your data center to be increased to a set point that is more comfortable for employees.






News-E-Logo   Frequently asked questions


Why choose a DirectJet cooling system instead of a computer room air conditioner (CRAC)?

On average, data centers with DirectJet cooling systems enjoy a 75% reduction in monthly cooling costs compared to air-conditioning alone.  And the number of servers per rack can typically be doubled, allowing data center operators to install more servers per square foot and maximize revenue.


What sets DirectJet systems apart from liquid cooling competitors?

Unlike competing systems, DirectJet cooling systems don’t use water or mineral oil to cool electronic devices. Instead, DirectJet systems use 3M Novec engineered fluid. Novec is a dielectric fluid that poses no risk to electronic devices. Sound too good to be true? Check out this video of a phone being completely submerged in Novec and then successfully receiving a call.


Image showing installation of a DirectJet Module of an Ebullient DirectJet liquid cooling system in a Dell server in a data center



What is DirectJet Technology?

DirectJet Technology harnesses advantages of phase change heat transfer to deliver exceptional performance and efficiency. In cooling systems with DirectJet Technology, a non-conductive fluid is pumped to DirectJet modules mounted on CPUs and graphics cards.  The fluid partially vaporizes within the modules, forming tiny vapor bubbles that efficiently transfer heat away from the devices to keep them cool. Vaporization of the non-conductive fluid absorbs roughly 12 times more heat than oil cooling and 6 times more heat than water cooling, per volumetric flow rate. This means that Ebullient systems achieve excellent cooling performance while only flowing a small amount of fluid, which allows small diameter tubing to be used, which is easy to route in any server (even blades), and allows small, cost-effective, energy-efficient pumps to be used.

Now that you're familiar with DirectJet Technology, we'd like to show you our products that leverage this amazing technology.



Why don’t competitors use Novec engineered fluid?

If competitors simply replace water or mineral oil in their liquid cooling systems with Novec, the performance of their systems will actually decrease, since Novec (in single phase) is not as effective at transferring heat as water or mineral oil. Consequently, to move the same amount of heat using Novec, competing systems would need significantly higher flow rates, which would require larger diameter tubing, which is difficult to route and package within servers, and larger pumps, which are more costly and consume more energy. In short, Novec is not a good option for cooling systems that rely on conventional single phase cooling.  To achieve excellent heat transfer performance with Novec requires two-phase cooling.  Ebullient's extensive patent portfolio prevents competitors from imitating its DirectJet Technology.



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