Calculations regarding air heat exchangers
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The shell side of the existing heat exchanger is fed with compressed air (with semi-circular baffle plates), while the tube side contains cooling water. The design conditions for the air are an inlet temperature of 120 degrees, an outlet temperature of 40 degrees, and a working pressure of 7 bar； The design conditions for the cooling water are 30 degrees at the inlet and 35 degrees at the outlet ； The diameter of the copper tubes used for heat exchange is 1/2” ； The pipe spacing is 16 mm ； I’m asking those who are experienced with calculation software to help me figure out what the total heat transfer coefficient is approximately.
I used 20 kg/s of water, DN500, L=2m, B=300, with a heat transfer coefficient of 300 W/m2*K
I have initially planned the cylinder diameter as DN450； Length 3m ； The distance between the baffles is 370 mm