Abstract
We describe the steady state and transient thermal response of the aft cabin of an aircraft that is retrofitted with high-power electronic equipment and cooled by heat rejection through the skin. In this skin-cooling design, the outer surface of the fuselage is treated as a heat exchanger. Hot air from an equipment exhaust plenum is drawn into a series of baffled ducts within the fuselage support structure, where heat is rejected and then recirculated into the cabin. The cooler air from the cabin is then drawn into the electronic equipment. The aircraft air-conditioning unit is also modeled to provide chilled air directly Into the cabin. In addition, this paper presents an algorithm and a control-system concept to maintain the temperature of the aft cabin within acceptable limits. Results establish a control-system design, which is being implemented in a CL-600 Challenger aircraft
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