Example
150,000 lb=h of flue gases having an analysis (vol%) of CO2 ¼ 12, H2O ¼ 12,
N
2 ¼ 70, and O2 ¼ 6 flows over a tube bundle having 2 in. OD tubes at 4 in.
square pitch. Tubes per row ¼ 18; length ¼ 10 ft. Determine hc if the fluid
temperature is 353F and average gas temperature is 700F. The Appendix
tables give the properties of gases.
At a film temperature of 0:5 ð353 þ 700Þ ¼ 526F; Cp ¼ 0:2695;
m ¼ 0:0642 and k ¼ 0.02344. Then mass velocity G is