i/ve posted a topic looks the same as this one buth the previuos one i wanted to get the diameter i got it, and now i want to calculate the cost for the whole design.

so i have this project which is designing a distillation column. the design is theoritical so nothing is exactly 100% right and alot of errors is expected, but again it is theoritical and there is values are based on assumptions. i got most of the values i need but i don't know how to calcuate the total cost of the column.

the distillation tower is an deethanizer and iam using it to separate ethane and propane (ignoring water and CO2).

assuming my column temperature is 72 Fehrenheit and my column pessure is 270 psia.

i got the relative volatility by getting the K values of my componenets and divided K of ethane on the K of propane and the relative volatility is 3.2

iam using sieve trays in the column with an efficiency of 0.75

i got the number of trays by using McCabe Thiele diagram, the number of trays i got is 11 trays after removing the condenser and the reboiler trays.

i also got the reflux ratio from the same diagram which is 0.438

i calculated the tower height by assuming i have a 0.6 m space between the trays, so 0.6 *11 = 6.6 m

What iam stuck on is how to calculate the total cost for the colum ,what should i do ? what equations should i use? what should i calculate first? what about trays, reboiler , condenser, maintenance and other important costs.

Thank you