A process heat recovery study identifies five potential modifications, none of which are mutually exclusive, with the

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A process heat recovery study identifies five potential modifications, none of which are mutually exclusive, with the costs and energy savings as follows: 

Project Capital Cost (MM$) Fuel Savings (MMBtu/h) 1.5 0.6 1.8 A B C D E 2.2 0.3 15 9 16 17 8

If fuel costs $6/MMBtu and the plant operates for 350 days/year, which projects have a simple payback period less than 1 year? 

What is the maximum 10-year NPV that can be achieved with a 15% interest rate and a 35% tax rate? Assume all the projects can be built immediately and use MACRS depreciation with a 7-year recovery term. What combination of projects is selected to meet the maximum NPV?

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Chemical Engineering Design

ISBN: 9780128211793

3rd Edition

Authors: Gavin Towler, Ray Sinnott

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