Homework Help: science

Posted by hagos on Friday, May 18, 2012 at 2:38pm.

in shell and tube type of condenser, the flue gas mixture of acetaldehyde,oxygen and nitrogen at 17391.17Kg/hr enters to the condenser at 75 degree celcius and leaves at 20 degree celcius,while the cooling water enters at 17 degree celcius and leaves at 37 degree celcius.calculate the mass flow rate of the cooling water?

science - bobpursley, Friday, May 18, 2012 at 2:49pm
Heat in cooling water= heat flow rate
masswater/time*specheatwater*(tf-ti)= massN2/time*specheatN2*(Ti-tf)

masswater/time= 17391.17*cN2(75-20)/(cH2o*(37-17)

cN2=1.041 kJ/kgK

cH2O=4.186 kJ/kgK

this will give you mass flow rate in kg/hr

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