Refrigeration and Air Conditioning
A one tonne refrigerating machine means that

One tonne of water can be converted into ice
One tonne refrigerant is used
One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min
One tonne is the total mass of machine

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Refrigeration and Air Conditioning
A thermostatic expansion valve in a refrigeration system

Ensures the evaporator completely filled with refrigerant of the load
Maintains different temperatures in evaporator in proportion to load
Is suitable only for constant load systems
None of these

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