Page 218 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

7. over the same pressure range. Why is this so?

Problems

*
The cost of a recent plant in Alberta, Canada, to produce 1.27 million tonne/y of polyethylene was
8. $540 million. Estimate what the range of cost estimates would likely have been for a Class 5, a Class
3, and a Class 1 estimate.

In Appendix A, Figures A.1–A.17, the purchased costs for various types of equipment are given. The
y-axis is given as the cost of the equipment per unit of capacity, and the x-axis is given as the
9.
capacity. The capacity is simply the relevant sizing parameter for the equipment. Identify all
equipment that does not conform to the principle of the economy of scale.

A process vessel was purchased in the United Kingdom for our plant in the United States in 1993. A
similar vessel, but of different capacity, was purchased in 1998. From the data given below, estimate
3
the cost in U.S.$ of a vessel of 120 m capacity purchased today (assume the current CEPCI = 500).
10.

You have been hired as a consultant to a legal firm. Part of your assignment is to determine the size of

a storage tank purchased in 1978 (CEPCI = 219), before computerization of records. Many records
from this era were destroyed in a fire (not in the plant, but in a distant office building). The tank was
replaced every 10 years, and the sizes have changed due to plant capacity changes. You have the
information in the table below. Estimate the original capacity of this vessel.
11.

In your role as a consultant to a legal firm, you have been requested to determine whether
calculations submitted in a legal action are valid. The problem is to determine what year a
compressor was placed into service. The information in the table is available. It is claimed that the
compressor was placed into service in 1976. History suggests that during the period from 1976 to
1985 there was significant inflation. Do you believe the information submitted is correct? If not, what
12. year do you believe the compressor to be placed into service? Use CEPCI = 500 for 2006.