Ambient Air Cooling vs. Liquid Cooling
The heat generated by computer equipment significantly affects overall IT performance.
The temperature on computer components has become critical and managing this heat is a challenge for anyone responsible for up-time.
Traditionally, ambient air cooling solutions are implemented to meet the rack cooling needs. The problem is, cooling of ambient air in a room is often insufficient to handle high heat loads in a cost and energy inefficient manner.
More power use in the computer room means more heat generated and so, more heat needs to be eliminated from around the computer equipment. With higher server densities as well as, more intensive computing applications, the use of liquid cooling solutions has become an increasingly popular part of computer room cooling strategies.
Here is a quick rundown of the two main approaches to computer room equipment cooling – ambient air cooling and liquid cooling.
Ambient Air Cooling
Computer room ambient air cooling solutions typically involve having the cooled air directed toward the air intakes of the computer equipment. The air is then exhausted from the back of the rack and is pulled toward the ceiling using the HVAC system.
Other methods of cooling using ambient air include the use of fans mounted to the roof or rear door of a server rack and the use of portable ac units, rack-mounted and wall air conditioners. Ambient air cooling solutions are limited in their ability to handle high heat loads, and tend to leave hot spots in the room.
Cooling Server Rack with Water
VARISTAR – THE ELECTRONIC CABINET PLATFORM
The Varistar features a controlled airflow system through to air/water heat exchangers with cooling capacity from 20 kW to 40 kW. This is a complete cabinet solution with a static capacity up to 1000 kg, protection class IP 55, high energy efficiency, water and air loops are temperature controlled, low noise level, fans may be exchanged individually will the unit is running.
The LHX 20, operating at 80 % fan speed, is very efficient with a total power consumption of only 530 Watts.
In the water circuit, the device proves very efficient thanks to its low pressure losses. Control is primarily through the water circuit; only in emergencies or at full load do the fans run at 100 % speed.
The low fan speed also contributes to the reduced noise level. The VARISTAR LHX 20 operates behind the tightly closed glass door and with 80 % fan speed creates a noise level of only 50.7 dB(A). This level of noise is suitable for many office environments.
VARISTAR is designed to provide outstanding shock and vibration stability and is built too provide long-term durability that you can depend upon.
The 1200 mm depth not only can you install all current server types in the VARISTAR LHX but there is also enough room for the cabling. Since the heat exchanger is inserted laterally as a complete module into the 800 mm wide cabinet only, the 19″ plane can be used to its full height of 42 U
Liquid cooling features include up to 40 kW cooling output, controlled variable speed fan and water flow based on actual heat load generated in a cabinet. Liquid cooling units have become an increasingly popular choice for computer room cooling, as they are better at managing the head loads created by high-heat blade centers than ambient air cooling solutions; are energy-efficient, as they remove waste heat with no temperature impact in the room and can be self-contained units; and can eliminate the need to construct an expensive raised data center floor.