Page 211 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

Equation A.4 and the data in Table A.4. For other equipment, the form of the equation is given
in Table A.5.
3. For exchangers, pumps, and vessels, find the pressure factor, F , Table A.2 and Equation A.2 or
P
A.3, and the material of construction factor, F , Equation A.4, Table A.3, and Figure A.18. Use
M
Equation A.4 to calculate the bare module factor, F BM .
4. For other equipment find the bare module factor, F BM , using Table A.6 and Figure A.19.

5. Calculate the bare module cost of equipment, C BM , from Equation 7.6.
6. Update the cost from 2001 (CEPCI – 397) to the present by using Equation 7.4.

Example 7.13 illustrates the six-step algorithm for the case of a distillation column with associated trays.

Example 7.13

Find the bare module cost (in 2006) of a stainless steel tower 3 m in diameter and 30 m tall. The tower
has 40 stainless steel sieve trays and operates at 20 barg.

The costs of the tower and trays are calculated separately and then added together to obtain the total cost.
For the tower,
2
2
a. Volume = πD L/4 = (3.14159)(3) (30)/4 = 212.1 m 3
From Equation A.1,

b. From Equation A.3 and Table A.4, F = 2.25 + 1.82 F F
BM M P
c. From Equation 7.10 with P = 20 barg and D = 3 m,

From Table A.3, identification number for stainless steel vertical vessel = 20; from Figure A.8,
F = 3.11
M

F BM = 2.25 + 1.82(6.47)(3.11) = 38.87
d. C BM (2006) = (166,880)(38.87) = $6,486,000
For the trays,
2
a. Tray (tower) area = πD /4 = 7.0686

From Equation A.1,