Refrigeration and Air Conditioning
The reduced ambient air cooling system has

One cooling turbine and one heat exchanger
Two cooling turbines and two heat exchangers
Two cooling turbines and one heat exchanger
One cooling turbine and two heat exchangers

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Refrigeration and Air Conditioning
A good refrigerant should have

High operating pressures and low freezing point
High specific volume and high latent heat of vaporisation
High latent heat of vaporisation and low freezing point
Low C.O.P. and low freezing point

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