Definitions for "Free air"
Free air delivery. Air at the atmospheric conditions of the site and unaffected by the compressor. Flow is measured at the discharge valve of the compressor, after the aftercooler, the water separator and built in check valve. Capacity and power consumption are corrected to ISO 1217 standard reference conditions: Ambient temperature = °20C, Ambient pressure = 1 bar(a), Relative humidity = 0%, Cooling water/air = 20°C, Effective working pressure at discharge valve = 7 bar(a). ( 010)
Air at ambient conditions of temperature, humidity, and atmospheric pressure at any specific locations.
Air at atmospheric conditions at any specific location. Atmospheric air varies according to altitude, barometric pressure, and temperature.