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

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

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Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Large displacements and high condensing pressures
Small displacements and low condensing pressures
Large displacements and low condensing pressures
Small displacements and high condensing pressures

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

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

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