Question

A heat exchanger with one body and eight pipe passes is designed. Water flows from the exhaust gas pipes as cold fluid by the body as cold fluid. Exhaust gas to the system at 210 ° C
and entering at a temperature of 140 ° C
The heat transfer coefficient is 392 W / m2K. On the other hand, water enters 16 iron (k = 38 W / mK) pipes with an inner diameter and outer diameter of 32 mm and 36 mm, respectively, at a temperature of 600 cm / s at 40 ° C and exiting at a temperature of 80 ° C. According to this
a.) Find the flow rate of the exhaust gas.
b.) Find the total heat transfer area.
c.) Calculate the pipe length for one pass.
(The properties of the water will be taken from the table. The air table will be used for the exhaust gas.)

i will vote thanks

Answer 1

Note: Property tables are missing. Please check property values with your values. Ignore the patches - oops rough work.




Answers :
a. Mass flow rate of exhaust gas is 11.1192 kg/s
b. Total heat transfer area required is 17.7128 m2.
c. Pipe Length for one pass is 19.57m.

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