Question:-
In an air conditioning plant the refrigeration load on the coil is 100 TR. The mass and enthalpy of air leaving the coil are 420 kg/minute and 40 kJ/kg respectively. What will be the enthalpy of the air at the inlet to the coil under these conditions?
Option (A)
80 kJ/kg
Option (B)
90 kJ/kg
Option(C)
100 kJ/kg
Option(D)
102.5 kJ/kg
Correct Option:
(B)
Question Solution:
100 TR = 100 x 210 = 21000 KJ/min
Now refrigeration capacity = mr(hi-hf)
21000 = 420 (hi-40)
hi = 90 KJ/kg
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