Discussion :: Refrigeration and Air Conditioning
- A one tonne refrigerating machine means that
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A.
One tonne is the total mass of machine |
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B.
One tonne refrigerant is used |
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C.
One tonne of water can be converted into ice |
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D.
One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min |
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Answer : Option D
Explanation :
1 tonne of refrigeration is the rate of heat removal required to freeze a metric ton (1000 kg) of water at 0°C in 24 hours. Based on the heat of fusion being 333.55 kJ/kg, 1 tonne of refrigeration = 13,898 kJ/h = 3.861 kW
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