HVAC and BEMS

The humidity of the air measured by the number of grains of water vapour present in one (1) cubic metre of air.

The sum of gauge and atmospheric pressure (psia).

The temperature measured on the Kelvin scale.

The lowest temperature theoretically attainable on the Kelvin scale (approximately -273.16°C).

In physics, the taking up of light, heat, or other energy by molecules.  The absorbed energy is converted into heat.  Absorption in chemistry is the taking up of one substance by another.  For example, a gas such as oxygen may be absorbed, or dissolved, in water.  In the HVAC industry, heat energy is absorbed from the medium being cooled and transferred in the refrigerant.

A shell device installed in the suction line of a HVAC system to prevent liquids from entering the compressor.

A processed carbon used in filter driers and commonly used in air filters to clean the air.

HVAC term for compressor-driven air conditioning.

A mechanical device for moving or controlling a mechanism or system.  For example, opening and closing valves or turning motors on and off.

A change in gas condition where no heat is added or removed except in the form of work.  It is a thermodynamic process.