Arrangement and method for utilizing the heat of waste air for heating the bilge area of aircraft

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 heated bilge flow emerging from the heat transfer unit.