Equipment and Plant Design Study Notes with Tab Guide

Disclaimer: This is just a study outline. Not to be substituted with real textbooks. If there are any data errors, or areas for improvement, comment down below so I can edit it. This is for personal purpose but I love sharing knowledge. Happy studying! Ganbatte!

Plant Design Requirements

• Process Evaluation
• Reliability
• Metallurgy
• Safety o Control

• Capital Estimation – evaluation of the plant project
• Total Capital Investment = Fixed Capital Investment + Working Capital [ TCI = FCI + WC ]

• Working Capital – 10% – 20% of the capital investment (Note: If the percentage is not given, use 15% as default)

COST INDEX

• Chemical Engineering Plant Cost Index (CEPCI) – use this for CHEMICAL PLANTS
• Marshal and Swift Index – use for CHEMICAL EQUIPMENT
• Nelson- Farrar Index– use for PETROLEUM REFINERY

[TABBING GUIDE: Check Page 9 -13, COST INDEX TABLE , Perry’s ChE Handbook 8th Edition]

SOLVING PROBLEM GUIDE:

• Example, if you wish to find the diameter of the tank (Dt) you need to know the volume first (V) and so on.

1. Volume (V)
2. Diameter of Tank (Dt)
3. Diameter of the impeller (Di)
4. Reynold Number of the Impeller (NRT,I)
5. Power Number (Np)
6. Power Requirement (P)

[TABBING GUIDE: Check Page 6-35, Reynold’s and Power Number Diagram Perry’s ChE Handbook 8th Edition]

SAMPLE PROBLEMS:

Note: Answers available in the next page.

1. It is the ability to resist deformation or deflection
2. Which of the following spot-examined type has the lowest joint efficiency factor?
3. It is the recommended cost index for cost estimation of chemical plants.
4. The cost of handling of materials is considered under the _.
5. How much is the estimated working capital if the total investment is 2.5M?
6. Estimate the year 1992 cost of an equipment if its 500-L equivalent costs Php3.5 M.
7. Estimate the cost of 2000-L equipment if its 500-L equivalent costs Php 3.5M
8. Calculate the wall thickness of a cylindrical pressure vessel with a radius of 30 inches and internal operating pressure of 200 psig. The allowable stress of the material is 10,000 psi and the joint efficiency is 0.85.
9. Calculate the head thickness of the pressure vessel in #8 for a 2:1 ellipsoidal head.
10. Calculate the wall thickness of the pressure vessel in #8 if it was spherical instead.
11. Calculate the tank diameter of a CSTR which has a liquid volume of 300 m3?
12. Calculate the impeller diameter of the CSTR given in #11?
13. What is the impeller Reynolds number of a mixing tank (Di= 1.75-m) containing hydrogen peroxide with an agitation speed of 20 rpm? (µ=1.245 cP)
14. What is the power number for the given mixing tank condition in #13?
15. How much is the power requirement for the mixing tank in #13?

ANSWERS AVAILABLE IN THE NEXT PAGE!