Problem4(2 points) The x component of velocity is a steady, incompressible flow field in the xy plane is u = Ax, where A = 2 m²/s, and x is measured in meters. Find the simplest y component of velocity for this flow field.

(a) What is the void fraction (ε) of the packed bed? (3 pts)

(b) What is the pressure drop across the packed bed? (6 pts)

(c) What is the water level of the brine inlet above the top of the brine outilet (H)? (6 pts)

(1) Simplify the equations of change in cylindrical coordinates by deleting the zero or neglectable items. (5 points)

(2) Write down the boundary conditions. (5 points) Equation of continuity: Equation of motion:

(a) Take the hemisphere transistor as your control volume, and determine the reduced heat equation.(5 pt)

(b) Determine the boundary conditions. (5 pt)

(c) Solve the equation from (a) and use the boundary conditions to obtain a general expression for the substrate temperature distribution. (3 pt)

(d) Obtain the general expression of heat rate. (2 pt)

Problem8 Fill-in-the-Blank (10 points) A countercurrent extraction plant is used to extract acetone from its mixture with water by means of methyl isobutyl ketone (MIK) at a temperature of 25℃. The feed consists of 40 percent acetone and 60 percent water. Pure solvent equal in mass to the feed is used as the extracting liquid. In such an extraction process, you need (a) 5pt ideal stages to extract 99 percent of the acetone fed, and the extract composition is (b) 5pt... after removal of the solvent. (Hint. The following phase diagran can be used)

110年 - 110 國立臺灣大學_碩士班招生考試_部分系所:輸送現象及單元操作#101948

109年 - 109 國立臺灣大學_碩士班招生考試_化學工程學研究所:輸送現象及單元操作#106060