brake-turbine-type heat exchanger

brake-turbine-type heat exchanger

A type of cold air unit in which the charge air from the engine compressor passes through the ram-air-cooled heat exchanger to enter the turbine through which it expands. This results in a pressure and a temperature drop. Mounted on the common shaft with the turbine is a centrifugal compressor, which is driven by the turbine and which, in absorbing the mechanical energy of the turbine, functions as a brake. The compressor has no other function but to act as a brake to the turbine as the air passing through the compressor is obtained from and is discharged to the atmosphere.