Refrigeration and Air Conditioning
The cooling system used for supersonic aircrafts and rockets is

Bootstrap air cooling system
Reduced ambient air cooling system
Regenerative air cooling system
Simple air cooling system

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Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Bigger cabinet should be used
Refrigerant with lower evaporation temperature should be used
Perfectly tight vapour seal should be used
Smaller cabinet should be used

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