Problem 4 A heat integration project results in saving 5 MM Btu/h of heating utility and...

 

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Problem 4 A heat integration project results in saving 5 MM Btu/h of heating utility and 14 MM Btu/h of cooling utility. The prices of heating and cooling utilities are $4/MM Btu and $7/MM Btu respectively. The process operates for 8000 h per year. The project requires the installation of three heat exchangers, pumps, and pipeline. The FCI of the project is $4.0 MM. The working capital investment is taken as 15/85 of the FCI. The annual operating cost of the project (for pumping the integrated streams) is $0.5 MM/year. Depreciation is calculated over 10 years with no salvage value. The corporate tax rate for the project is 25% of the annual taxable gross profit. What is the payback period of the project? Problem 4 A heat integration project results in saving 5 MM Btu/h of heating utility and 14 MM Btu/h of cooling utility. The prices of heating and cooling utilities are $4/MM Btu and $7/MM Btu respectively. The process operates for 8000 h per year. The project requires the installation of three heat exchangers, pumps, and pipeline. The FCI of the project is $4.0 MM. The working capital investment is taken as 15/85 of the FCI. The annual operating cost of the project (for pumping the integrated streams) is $0.5 MM/year. Depreciation is calculated over 10 years with no salvage value. The corporate tax rate for the project is 25% of the annual taxable gross profit. What is the payback period of the project?