GRC & Minimus Servers Blog

All You Need to Know About... ElectroSafe

Posted by Dhruv Varma on January 13, 2016

Today's post continues our series All You Need to Know About... with a "deep dive" into the magical liquid that makes it all possible – ElectroSafe. We'll look at all aspects of our coolant from fire safety to what makes it the perfect liquid for immersion cooling. For further reading, download the ElectroSafe Coolant Fact Sheet and FAQs for a brief one-page overview with information such as the NFPA fire diamond and coolant characteristics such as evaporation rate and density, then give our White Paper on the subject, Submerged Servers in the Data Center a read to discover how safe ElectroSafe really is.

What is ElectroSafe?

The ElectroSafe coolant, used in the CarnotJet liquid cooling system, is a clear, odorless, non-toxic blend of dielectric mineral oils. 
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All You Need to Know About... Storage Drives in Immersion Cooling

Posted by Matt Solomon on November 30, 2015

In this edition of the All You Need to Know About... series, we talk about one of the most commonly asked questions regarding liquid immersion cooling: what kind of drives can be immersed, as well as how standard spinning disks can be used in the CarnotJet system.

Drives that can be immersed

Solid State Drives (SSDs)

As the name suggests, SSDs are solid state devices with no moving parts. Hence can be submerged in ElectroSafe right out of the box just like other solid state components such as memory DIMMs, mother boards, etc. With the steadily declining price and superior speed and performance of SSDs, they are quickly becoming the storage device of choice.

Helium-filled Drives

Helium-filled drives, such as the Ultrastar He6 offered by Western Digital’s HGST, are hermetically sealed and can be directly submerged in ElectroSafe.

How unsealed spinning disks can be used in the CarnotJet system

While unsealed HDDs cannot be submerged out of the box like SSDs and hermetically sealed drives, they can be adapted to be used with immersed servers by being kept above the surface of the oil. This is done through the use of a modified drive caddy designed to fit in the existing drive caddy slot – as seen in the photo on the left.


To learn more about the performance and reliability of the CarnotJet system click here, then get in touch via email at or phone at +1 (512) 692-8003.
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All You Need to Know About... Floor Space Optimization

Posted by Dhruv Varma on November 25, 2015

Whether in planning a retrofit or a greenfield build, floor space utilization in the data center is an important consideration. There are a number of ways floor space utilization is measured for data centers – Watts per square foot, servers per square foot, square feet per rack, etc. Below shows the ways in which GRC's CarnotJet system is able to save valuable floor space in the data center as compared to traditional architectures.

Get More Compute per Square Foot with GRC

Less Infrastructure

The CarnotJet system not only eliminates the need for traditional CRACs, CRAHs, and perimeter cooling, it also helps downsize the power and backup infrastructure proportional to the reduction in peak power.

Denser Layout: No hot and cold aisles

CarnotJet racks are installed back-to-back and end-to-end next to each other. There is no space wasted in creating hot and cold aisles – as compared to traditional air-cooled environments – thereby eliminating each alternate aisle and freeing up space.

Denser Racks: Support more than 100 kW per rack

The ElectroSafe coolant used in the CarnotJet system has 1,200 times the heat capacity of air (by volume). This, along with the superior thermal conductivity and closed loop thermal management, allows for extremely high IT load densities in the racks. In fact, some high performance customers have been able to pack more than 100 kW of IT load in a single rack.

Further Reading

This post only scratches the surface of how efficient, powerful, dense and cost-effective GRC's CarnotJet system is. To read more in-depth explanations and see sample layouts, download our white paper about floor space optimization.


To learn more about Green Revolution Cooling's CarnotJet system, please feel free to get in touch via email at or by phone at +1 (512) 692-8003.
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Data Center Liquid Cooling Myths - Busted!

Posted by Matt Solomon on October 19, 2015


You may have heard a few exemplary facts about liquid immersion cooling - like our CarnotJet system - such as its  incredible CAPEX and OPEX savings. However, you also may have heard some things that made you unsure about this emerging technology. Today we dispel some of the myths about liquid immersion cooling, and set things straight with the facts about this revolutionary technology.
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Top 5 Reasons: Why It's Time to Start Submerging Data Center Servers In Oil

Posted by Dhruv Varma on October 9, 2015


Oil immersion cooling from Green Revolution Cooling has been on the market for over five years now. Over the years we’ve seen adoption of immersion liquid cooling expand to a number of industries, applications, and geographies. Here’s why we think it's time to take a hard look at what immersion cooling could mean for your data center:

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