compito chimici 2019214 Soluzione

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Test on 14/02/2019 Student (Name, Surname)_________________________________________ Id. Number (Matr.):___________ Please note that: correct solution of exercise 1 is mandatory to pass the exam; you are required to write in English. Please explain all what you want to do with your computations or you will be penalized. Exercise 1 We need to install a tall vertical distillation column with out er diameter D 0 = 4.2 m (including insulation of 0.3 m in thickness) and total height H = 42 m. The available specifications are: External diameter of the vessel d = 3.6 m. Thickness of vessel shell t = 5 mm. Weight density of vessel shell s=76.00 kN/m3. Weight density of insulation i = 5.0 kN/m 3. Load per unit of vertical length of the external access ladde r: wl = 0.30 kN/m. Load per unit of vertical length of a 280 mm outer diameter pipe: wp =0.60 kN/m. Load per unit of vertical length equivalent to tray weight, including liquid, (computed assuming a spacing 0.6 m of the trays and a weight of the trays of 1.1 kN/m 2): wt = 18.65 kN/m. Permissible material stress of vessel shell adm = 1 6 0 M P a . Y o u n g Modulus of vessel shell material E = 210 GPa. Operating temperature and pressure – 160°C and 0.4 MPa. Wind force acting below the lower 20 m qw1 = 3.0 kN/m, wind force acting above the lower 20 m qw2 = 3.0 kN/m (see picture). 1) After having schematized the distillation column as vertical c antilever, and considering only the bending stiffness of a circular hollow cross-section of external diamet er d = 3.6 m and thickness t = 5 m m . ( i . e . considering as providing stiffness only the section of the vessel), evaluate through an a pplication of the Virtual Work Principle (VWP) the HORIZONTAL DISPLACEMENT at the top of the distillation column. 2) Select 4 points on the…