Compressed air is used in a variety of ways—from stoking a fire to propelling a jet aircraft --and is produced by many types of machines. Although such mechanisms as pile drivers, fans, or drills use air under pressure to perform some task,...

A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compression of a gas naturally increases its temperature. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport...