C_p=1253 temperature=900 to 320 C cooling water temperature=26.70 mass flow rate of gas=0.38 cost of cooling water=7 doller per meter square anually charge of heat exchager=97.5 doller per meter square transfer cofficient=(45 W/m^2 )/K

To find

Optimum outlet temperature of cooling water

Minimum total cost

Solution

Rate of heat transfer

 Question 2

To find

Height H of the distillation column

Solution

Average relative volatility

From the table 1 it can be noted that

At temperature 139 the value is 64.3 and at 167 it is about 0.7

Apply the formula

Minimum number of stages at total reflux using Fenske equation

Apply formula 

Minimum reflux ratio using underwood equation

Number of equilibrium stages N using Gilliland correlation