Example 6.7 For the above steam generator there is a tubular type air preheater following the economiser, where the flue

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Example 6 7 For The Above Steam Generator There Is A Tubular Type Air Preheater Following The Economiser Where The Flue 1 (103.06 KiB) Viewed 33 times

Example 6.7 For the above steam generator there is a tubular type air preheater following the economiser, where the flue gases flow through the tubes and are cooled to 160 °C and air entering at 35°C flows outside the tubes at the rate of 1167 kg/s. The inlet velocity of flue gases is 13 m/s and the tubes are of 60/65 mm. If the overall heat transfer coefficient is 30 W/m²K, find the length and the number of tubes. Assume that the flue gases behave as an ideal gas having cp = 1.10 and R=0.287 kJ/kg K. -