(Solved): b) An organic liquid is to be vaporised inside the tubes of a vertical thermosyphon reboiler. The ...

b) An organic liquid is to be vaporised inside the tubes of a vertical thermosyphon reboiler. The reboiler has 170 tubes of internal diameter 22 mm, and the total hydrocarbon flow at inlet is 58 000 kg h-¹. Using the data given below, calculate the convective boiling heat transfer coefficient at the point where 30% of the liquid has been vaporised. DATA Nucleate boiling film heat transfer coefficient Inverse Lockhart-Martinelli parameter 1 X? Liquid thermal conductivity Liquid specific heat capacity Liquid viscosity 3400 W m-²K-¹ 2.3 0.152 W m-¹K-¹1 2840 J kg-¹K-¹ 4.05 x 10-4 N s m-² [12 marks]