Chemical Engineering Design: Principles, Practice and Economics of Plant and Process Design 2nd Edition

Solutions to Towler & Sinnott Chemical Engineering Design 2nd edition Part I: Process Design Part II Plant Design Chapter 1: Introduction Chapter 13: Equipment design Chapter 2: Flowsheet development Chapter 14: Pressure vessel design Chapter 3: Utilities and energy recovery Chapter 15: Reactor design Chapter 4: Process simulation Chapter

Solution 3.7 See example 3.5 for hand calculations. I solved this using UniSim ExchangerNet R360 and got the following peratures: no pinch it is a threshold problem h, CPhot > CPcold, so to reach the target temperature of m Pinch temMinimum hot utility 0kW, Minimum cold utility 3860kWSince the problem

Chapter 7 Solution 7.1 Cost can be estimated using historic data correlations given in Table 7.1. 80,000 metric tons per year = 80,000/1.016 = 78740 tons per year Cost = a Sn = 0.321 (78740)0.6 = $ 278 MM on a January 2006 USGC basis. 80,000 metric tons per year

Q102 T1 128.7748 LHS 468378.5 RHS 468378.5 difference -0.0062 Energy cost 4.6 $/MMBtu Heater duty 850 kW Heater efficiency 0.8 Evaporator duty 1062.5 kW Op hrs/yr 8000 Annual fuel consumption 30600 GJ/y annual heat rate (BTU) 29004.7393 MMBtu/yr Annual cost (approx) 140,760.00 Annual cost (actual) 133,421.80 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 A B C D E F G fuel price ($/MMbtu) 4 boiler efficiency 0.8 Frxn back pressure steam ($/Mlb)

$ Main plant items 18000 Installation factor 4 ISBL installed cost 72000 OSBL costs 0 EPC costs 21600 Contingency 14400 Total capital cost 108000 Year Gross profit ($) Depreciation charge ($) Taxable income ($) Taxes paid ($) Cash Flow ($) Discount factor Present value of CF ($) 1 0 0 0 0 -108000 0.881 -95163.96 5yrMACRS 223500 21600.00 1900 0 23500.00 0.776 18245.90 20 323500 34560.00 -11060 665.00 22835.00 0.684 15622.38