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B767Driver · May 4th, 2008, 21:02

A PACK is an air conditioning unit in a jet. I believe it stands for "pneumatic air conditioning kit"...but maybe I'm making that up.

The PACK works by the compression and expansion of air...thereby causing cooling in the process.

A PACK consists of heat exchangers, a compressors and a turbine. Engine air from the compressor is routed to a heat exchanger to for cooling and then is compressed by the compressor. A second heat exhanger cools the compressor air before it is routed to a turbine. Here the air rapidly expands and cooling is the result.

May 4th, 2008, 21:02	#29
B767Driver Old Skool Join Date: Sep 2003 Posts: 1,784	Re: A ? for Boeing and Airbus guys... A PACK is an air conditioning unit in a jet. I believe it stands for "pneumatic air conditioning kit"...but maybe I'm making that up. The PACK works by the compression and expansion of air...thereby causing cooling in the process. A PACK consists of heat exchangers, a compressors and a turbine. Engine air from the compressor is routed to a heat exchanger to for cooling and then is compressed by the compressor. A second heat exhanger cools the compressor air before it is routed to a turbine. Here the air rapidly expands and cooling is the result. __________________ A self described gym rat. "I got next."