Equipment purchase costs compressors

Turton et al (2009) provide the following correlation [Equation (10.B.4)] for estimating the purchase cost of equipment (PCE) for a compressor and its drive. 

For the ammonia process, which operates at high pressure (200 atm), mostly in the gas phase, the total f.o.b. purchase cost of the on-site process equipment is 31,520,000. Installation costs boost this amount by a factor of 3.453 to a total bare-module cost of 108,830,000. As seen in Table 16.14, this cost is dominated by the gas compressors, with significant contributions from the heat exchangers and the membrane separators. Surprisingly, the reactor cost is a small fraction of the total cost. This is often the case for chemical plants. The reactor may not cost much, but it is the heart of the process and it better produce the desired results. 

Table 16.32 Purchase Costs (f.o.b.) of Other Chemical Processing Equipment, CE Index = 394. Equations for pumps, compressors, motors, heat exchangers, and pressure vessels are in Section 16.5 ... 

Part Three includes chapters that provide instruction and examples of the design of heat exchangers, multistage and packed towers, and pumps, compressors, and expanders. In addition, Chapter 16 provides guidelines for selecting processing equipment and equations for estimating the purchase costs of a broad array of equipment items. Furthermore, Section 16.7 shows how to use the Aspen Icarus Process Evaluator (IPE), with the process simulators, to estimate purchase costs and the total permanent investment for a chemical plant. 

Supplier partnerships or alliances have been used to control the cost of procurement. They are based on methods developed in Japan, initially in the automobile industry. These methods have been extended into the process industry and for the purchase of such items as compressor trains. Generally as originally conceived, they were intended mainly for commodity items. By using some innovative approaches, the concept of partnerships or alliances has been extended into the purchase of custom equipment. 

---