Liquid cooling for servers also supplies hot water

Nov. 6, 2012
Liquid cooling for servers also supplies hot water

The CarnotJet from Green Revolution Cooling, Austin, uses a liquid coolant to remove heat from data-center servers, including highdensity and blade servers. The coolant is a nonproprietary odorless, white mineral oil which was chosen for its clarity, low viscosity, high flash point, and high specific heat capacity.

To ensure servers can survive submersion in the coolant, GRC removes the fans and encapsulates the hard drives. Also, servers typically use thermal grease to help heat sinks remove heat. In the CarnotJet, it gets replaced with a covering of indium, a soft metal foil with Liquid cooling for servers high-heat conductivity.

Coolant is pumped through a heat exchanger, where it gives up its heat to a stream of water. A pump module containing variable-speed, digitally controlled pumps and heat exchangers can handle the thermal demands of up to four racks of servers. And the coolant should last 10 years or more, roughly the life of the system.

Using this equipment instead of an arsenal of chassis and power-supply fans cuts a server’s energy use by 5 to 25% and reduces the amount of energy used for cooling by 90 to 95%. It also lets the servers be packaged in a smaller enclosure. The closed-loop liquid cooling and pump are also significantly quieter than the fans they replace. And water comes out of the heat exchanger at 122°F and can be sent to an evaporative cooler or serve as a source of hot waste for a secondary purpose such as heating nearby buildings.

 © 2012 Penton Media, Inc.

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!