A heat exchanger consisting of 1-shell-pass and 8-tube-passes, with 50 tubes in each pass, uses hot water on the tube si

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A Heat Exchanger Consisting Of 1 Shell Pass And 8 Tube Passes With 50 Tubes In Each Pass Uses Hot Water On The Tube Si 1 (29.97 KiB) Viewed 14 times

A heat exchanger consisting of 1-shell-pass and 8-tube-passes, with 50 tubes in each pass, uses hot water on the tube side to heat engine oil on the shell side as shown in figure below. The tube is made by copper (k= 399 W/mK, ID-20 mm, OD-24 mm) with a length per pass of 3 m. Water enters into heat exchanger at 87 °C and leaves at 27 °C with a total mass flowrate of with 600 kg/min. While oil enters at 7 °C and leaves at 37 °C. The fouling resistance outside of the tube is estimated to be 0.00003 m² K/W. Do the followings a) What type of shell and tube heat exchanger is recommended for this service (parallel or counter) ? Explain your answer. [2] b) Determine mass flowrate of oil [1] c) Use the s-NTU method and estimate the rate of heat transfer by the exchanger. [4] d) Find hy and ho (Use the e-NTU method whenever it is required). [5] e) is the following equation true or false? Prove your answer mathematically based on this problem statement. [4] Oil Water Available data: Water, liquid (Tave 330 K): cp-4184 J/kg-K, k0.650 W/mK. 489 106 N-s/m³, Npy=3.15. Engine oil (Tave 295K); cp 1890 J/kg-K, k=0.145 W/m-K, u74 102N-sm², Npy - 9650 [Detail steps are required here. Quick answers are not acceptable]