Consider an air cooler where the flow rate of liquid is large compared to the air, and the effectiveness, e, of the cooler is known to depend on the flow rate of air according to the relation, e ~ mair^-0.3 . The air inlet temperature is 25oC and the liquid inlet temperature is 120oC.
a. If the airflow rate increases 80%, the percentage increase in the heat removal is __________ At a given airflow rate the outlet air temperature is 55oC
b. When the airflow rate increases 50%, the heat transfer increases 20%, the new air outlet temperature is __________
c. When the airflow rate increases 100%, the heat transfer increases 40%, the new air outlet temperature is