In an air conditioner, an inverter is used to control compressor motor speed to allow continuous temperature regulation. Without an inverter the air conditioner could only control temperature by either working at full speed or being powered off. An air conditioning unit with an inverter is more energy efficient and can have a longer working […]
Liquid immersion cooling is a cooling solution for high-density racks in server rooms (40-50kW) and datacentres that relies on heat reduction through the immersion of the server hardware in a dielectic liquid that can conduct the heat. A dielectic liquid for this type of cooling application should have good thermo-physical properties (high conductivcity and speciifc […]
Adiabatic cooling in a datacentre environment is referred to as ‘free air cooling’. The cooling process is a naturally occuring phenomena for regulating temperature and relies on a change in air pressue and volume expansion to reduce heat. When the pressure on a volume of air is reduced, the air expands and the volume increases. As […]
Active cooling is the practice of applying cool air to an area or system or device via an air conditioning or cooling unit. Active cooling can also be referred to as forced cooling or forced convection. The alterantive is natural convection or passive cooling.
DX stands for direct expansion and a DX air conditioning unit uses a condensed refrigerant liguid in an expansion and compression cycle to cool air. In a server room or datacentre the DX unit cools the air coming in through a supply plenum and returns cool air to the area where it is required.
GWP in air conditioning units stands for Global Warming Potential. GWP is a relative index to quantify the amount of heat trapped in the atmosphere by a greenhouse gas. By definition the GWP of carbon dioxide (CO2) is equal to 1.
Sensible heat is the heat that causes an object to change temperature. When an object is heated the increase in heat is called the ‘sensible heat’. When the temperature of an object falls, the heat removed is called ‘sensible heat’. Latent heat is the heat the heat added to an object in order for it to […]
EER stands for Energy Efficiency Ratio and measures the energy efficiency of an air conditioning unit. An air conditioner’s EER is calculated by dividing the cooling capacity of the air conditioning unit (measured in BTU, British Thermal Units) by the power input required (in Watts). The higher the EER ratio, the more energy efficient the air […]
The optimum temperature for a server room is 20-21°C (68-71°F). This provides a comfortable environment for technicians and engineers to work in and one that can help to maximise the electronic and electrical equipment within the room including the servers, UPS systems and air conditioners.
The 2014 EU Regulation for fluorinated greenhouse gas (F-Gas) usage, is intended to reduce emissions of F-Gasses which are used as refrigerants in some air conditioning units. The gasses in question include R134a, R407C and R410A which all come under the regulation. The objective is to ensure their containment by raising professionalism during installation, operation and maintenance […]