Refrigeration and Air Conditioning
The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration

2 to 5 h.p. per ton of refrigeration
1 to 2 h.p. per ton of refrigeration
0.5 to 0.8 h.p. per ton of refrigeration
0.1 to 0.5 h.p. per ton of refrigeration

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Refrigeration and Air Conditioning
In a bootstrap air evaporative cooling system, the evaporator is provided

Between the combustion chamber and the first heat exchanger
Between the first heat exchanger and the secondary compressor
Between the secondary compressor and the second heat exchanger
Between the second heat exchanger and the cooling turbine

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Refrigeration and Air Conditioning
One ton of the refrigeration is

The refrigeration effect to produce 1 ton of ice at NTP conditions
The standard unit used in refrigeration problems
The cooling effect produced by melting 1 ton of ice
The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours

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