Maqboole Posted May 18, 2009 Share Posted May 18, 2009 Plz help i just dont knwo how to solve it i just want a little help.thz Water at the rate of 68kg/min is heated from 35 to 37 C by oil having a specific heat of 1.9kj/kg C. The fluids are used in a counter double pipe heat exchanger, & ayhe oil enters the exchanger at 110 C & leave at 75 C/.The overall heat transfer coefficient is 320 W/m^2 C. Calculate the heat exchanger area. Answer is 15.82 m^2 Link to comment Share on other sites More sharing options...
insane_alien Posted May 18, 2009 Share Posted May 18, 2009 can you show us the method you used to get that value? your off by 300% 1 Link to comment Share on other sites More sharing options...
Maqboole Posted May 18, 2009 Author Share Posted May 18, 2009 I didt get this answer at all i got something else this is the answer what we are told by our teacher. I wanted to use the formla A=Q/Utln For that i used the formula Q=m cp t then i used the formula for calculating tln = (t1-t2)/ln(t1/t2) we are given u now when we use that we dont get the right answer Link to comment Share on other sites More sharing options...
insane_alien Posted May 18, 2009 Share Posted May 18, 2009 are you going to show us the numbers you got so we can show you where you went wrong? Link to comment Share on other sites More sharing options...
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