Patent ID: 7980928

Claim:
An arrangement for utilizing heat of waste air for heating a bilge area of an aircraft, comprising a bilge area, a heat transfer unit connected to the bilge area via a first air supply pipe, through which a bilge air flow drawn in from the bilge area flows into the heat transfer unit, the heat transfer unit being further connected to a second air supply pipe, through which a waste air heat flow to be cooled and that is created at another location in the aircraft flows into the heat transfer unit in order to heat the drawn-in bilge air flow; the heat transfer unit being further connected to a first air discharge pipe, through which the cooled waste air heat flow is discharged, and a second air discharge pipe with a bilge inlet section, whereby at least a portion of the heated bilge flow is returned to the bilge area via the second air discharge pipe and the bilge inlet section, wherein the arrangement is configured to recover electrical or mechanical energy by cooling the bilge air flowing into the heat transfer unit.