Find the bare module cost of a floating-head, shell-and-tube heat exchanger with a heat transfer area of 100 m at the end of 2016. The operating pressure of the equipment is 1.0 bar, with both shell and tube sides constructed of carbon steel. The cost curve for this heat exchanger is given in Appendix A, Figure A.5, and is repeated as Figure 7.4. It should be noted that unlike the examples shown in Figures 7.1 and 7.2, the log-log plot of cost per unit area versus area is nonlinear. In general this will be the case, and a second-order polynomial is normally used to describe this relationship.

Figure A.5

Figures 7.1

Figures 7.2

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Purchased Cost of Heat Exchanger per Unit of Heat Transfer Area, C/A ($/m²) 10,000 1000 100- 10,000 1000- 100- 10,000 1 1000 100 1 1 Multiple Pipe Double Pipe 10 Teflon Tube 10 Spiral Tube Scraped Wall 10 Fixed Tube Sheet (S&T) 100 Heat Transfer Area, A (m²) 100 Heat Transfer Area, A (m²) Kettle Reboiler 100 Heat Transfer Area, A (m²) Bayonet Floating Head (S&T) 1000 CEPCI=397 (Sept 2001) Flat Plate 1000 CEPCI=397 (Sept 2001) Air Cooler 1000 CEPCI=397 (Sept 2001) U-Tube 10,000 10,000 10,000