In: Chemistry
Refridgerant-134a with a flow rate of 0.12 kg/s is cooled to 40 degrees C at constant pressure in a condenser by using cooling water. Initially the refrigerant is at 1,200 kpa and 50 degrees C. Estimate the heat removed by the cooling water.
temperature change of the refrigerant=T=50 C-40 C=10C
mass of refrigerant=0.12 kg/s
Heat removed by cooling water =mass *specific heat of water*T=0.12kg/s*4.186 J/g C*10C
=0.12*1000 g/s*4.186 J/g C*10C
=5023.2J/s
=5.023 KJ/s (rate of removal of heat by cooling water)