Heat Exchanger Overall Heat Transfer Coefficient

Please see the attached file for the completely formatted problem(s). The heat transfer coefficients and the fouling factors on the tube and shellside of a heat exchanger are given. The hermal resistance and the overall heat transfer coefficients based on the inner and outer areas are to be determined.

Heat Exchanger (Condenser)

Please see the attached file for the fully formatted problem(s). Steam is condensed by cooling water in the condenser of a power plant. The mass flow rate of the cooling water and the rate of condensation are to be determined.

McCabe-Thiele Method: Calculation of Theoretical Plates

The solution is detailed and well presented. Problem: A saturated liquid mixture containing 60 mole % benzene and 40 mole % toluene is to be distilled continuously into a distillate product containing 90 mole % benzene and the bottom product containing 5 mole % benzene. The fractional distillation column will operate at approximately constant pressure of 1 atm. The reflux ratio is 2. How many theoretical plates must the column have if the feed is introduced into the eighth plate? Equilibrium data are: x 0 0.017 0.075 0.13 0.211 0.288 0.37 0.411 0.581 0.78 1 y 0 0.039 0.161 0.261 0.393 0.496 0.591 0.632 0.777 0.9 1

Steam Distillation: Boiling Point Calculation

The problem is attached in the following file. Vapor pressures of chlorobenzene and water are given below: Pressure, mm Hg 100 50 30 26 Temperature oC, Chlorobenzene 70.4 53.7 42.7 34.5 Temperature oC, Water 51.7 38.5 29.9 22.5 If steam is blown into the still containing a mixture of these two components and the total pressure is 130 mm Hg, estimate the temperature of boiling and the composition of the distillate. The two components are immiscible in the liquid :

Equilibrium Flash Distillation

Please see the attached file for the fully formatted problem(s). Problem: A feed of 50 mole % hexane and 50 mole % octane is fed into a pipe still through a pressure reducing valve and then into a flash disengaging chamber. The vapor and liquid leaving the chamber are assumed to be in equilibrium. If the fraction of the feed converted to the vapor is 0.5, find the compositions of the top and bottom products. The following table gives the equilibrium data for this system. Mole fractions of hexane in liquid x 1.00 0.69 0.40 0.192 0.045 0.00 Mole fractions of hexane in vapor y 1.00 0.932 0.78 0.538 0.1775 0.00