A refrigerated truck has a dimension of 12m*2m*3m. The cargo space at the refrigerated truck is to be cooled from 25(oC) to 6(oC). The heat lost by transmission is 1kJ/s and the power input of the refrigeration system is 10kW?
Density of air is 1.2 kg/m3. Specific heat of air is 1.005 kJ/Kg(oC)
Calculate the time it takes to cool the truck.
From these data, i was able to calculate the mass of air ( 86.4 kg ) and the amount of heat removed to cool the truck from 25(oC) to 6(oC) which i obtained as 1649.8 kJ .
How should i proceed to calculate the time?
Density of air is 1.2 kg/m3. Specific heat of air is 1.005 kJ/Kg(oC)
Calculate the time it takes to cool the truck.
From these data, i was able to calculate the mass of air ( 86.4 kg ) and the amount of heat removed to cool the truck from 25(oC) to 6(oC) which i obtained as 1649.8 kJ .
How should i proceed to calculate the time?
1 Answer
May 1, 2018
Excuse me if I'm wrong, but you're making this overcomplicated, the answer is in your question!
The transmission loses the heat at a rate of,
Hence, it would take approximately,
to cool the truck with that transmission.
