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Analysis of Organic Rankine Cycles for a Boiler Station

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Analysis of Organic Rankine Cycles for a Boiler Station ( analysis-organic-rankine-cycles-boiler-station )

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4.6 Profitability Analysis A smaller, 500 kWel, system is simulated and the results of the financial analysis is shown in table 4.4. A total generation of 2.63 GW h/year is achieved. It amounts to an average power generation of 328 kW during the operational period of the year, which is 333 consecutive days in total. Almost all of the generated electricity is self-consumed locally at the plant, yielding a electricity saving of 1080 kSEK⁄year. The reduction in distribution cost and reduction in power charge fee together together consitute a significant share of the total revenues, 120 kSEK/year and 164 kSEK/year respectively. Parameter Power rating CAPEX Unit cost Installation cost OPEX Maintenance cost Fuel cost Power generation Electricity generation Electricity, self-consumed Electricity, sold Revenues Revenue electricity sold Revenue electricity self-consumed Revenue certificates Revenues reduced distribution cost Revenue reduced power charge fee Aggregated Total revenue Total O&M costs Net operational benefit Net electricity value, after fuel costs Profitability measures NPV IRR Payback period Table 4.4 Financial analysis of a 500 kWel ORC. Value 500 kWel 7.39 MSEK 1.48 MSEK 147 kSEK⁄year 552 kSEK⁄year 2.63 GWh⁄year 2.40 GWh⁄year 0.23 GWh⁄year 99.2 kSEK⁄year 1080 kSEK⁄year 131 kSEK⁄year 120 kSEK⁄year 164 kSEK⁄year 1600 kSEK⁄year 700 kSEK⁄year 900 kSEK⁄year 0.34 SEK⁄kWh 2.3 MSEK 7.9% 9.9 years The model is simulated for power ratings of 100 kWel to 2000 kWel, in steps of 100 kWel, and the net present values, internal rates of return and payback periods are determined. The results are presented in figures 4.21 4.22 4.23. For the default case, i.e. an electricity price of 0.45SEK/kWh, the maximum NPV is estimated to 2.3 MSEK, for a 400 kWel system. The maximum IRR and 73

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