written 8.3 years ago by | modified 2.7 years ago by |
Mumbai University > Mechanical Engineering > Sem8 > Refrigeration and Air Conditioning
Marks: 5M
Year: Dec 2013
written 8.3 years ago by | modified 2.7 years ago by |
Mumbai University > Mechanical Engineering > Sem8 > Refrigeration and Air Conditioning
Marks: 5M
Year: Dec 2013
written 8.3 years ago by |
Aircraft air refrigeration systems are required due to heat transfer from many external and internal heat sources (like solar radiation and avionics) which increase the cabin air temperature. With the technological developments in high-speed passenger and jet aircrafts, the air refrigeration systems are proving to be most efficient, compact and simple. Various types of aircraft air refrigeration systems used these days are:
Simple air cooling system:
Process 1-2= Isentropic ramming of air
Process 2-3i=Isentropic compression in main compressor
Process 2-3=Actual compression in main compressor
Process 3-4=Constant pressure heat rejection in heat exchanger
Process 4-5i=Isentropic expansion in cooling turbine
Process 4-5= Actual expansion in cooling turbine
Process 5-6=Constant pressure heat addition in cabin