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Conceptual Design Methods Hybrid-Electric Transport Aircraft

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Conceptual Design Methods Hybrid-Electric Transport Aircraft ( conceptual-design-methods-hybrid-electric-transport-aircraft )

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4.5 Summary of Cost-Index for Hybrid-Electric Aircraft 63 considering the electrical cost as part of the fixed cost. Consequently, only the change in fuel consumption is relevant to determine the optimum economic Mach number. πΆπΌπΈπΈπ‘™π‘’π‘π‘‘π‘Ÿπ‘–π‘,π‘π‘œπ‘›π‘ π‘‘ = π‘π‘‡π‘–π‘šπ‘’ = βˆ’d𝐸𝑆𝑒𝑝𝑝𝑙𝑦,π‘‡π‘œπ‘‘π‘Žπ‘™ = βˆ’d𝐸𝑆𝑒𝑝𝑝𝑙𝑦,𝐹𝑒𝑒𝑙 (4.33) 𝑐𝐹𝑒𝑒𝑙 d𝑑 d𝑑 4.5 Summary of Cost-Index for Hybrid-Electric Aircraft The cost-index equations established through Section 4.4 are summarized in Table 4.1. Cost Index Equation (4.19) Equation (4.21) Equation (4.25) Equation (4.33) 𝐢𝐼 = 𝑐𝑇 π‘–π‘šπ‘’ + 𝐸𝑆𝑒𝑝𝑝𝑙𝑦,𝑇 π‘œπ‘‘π‘Žπ‘™ Β· (𝑐𝐸𝑙𝑒𝑐 βˆ’ 𝑐𝐹 𝑒𝑒𝑙) Β· d𝐻𝐸 d𝑑 𝑐𝐹𝑒𝑒𝑙 Β·(1βˆ’π»πΈ)+𝑐𝐸𝑙𝑒𝑐 ·𝐻𝐸 Cost Index for Constant Degree of Hybridization for Energy πΆπΌπ»πΈπ‘π‘œπ‘›π‘ π‘‘ = π‘π‘‡π‘–π‘šπ‘’ 𝑐𝐹𝑒𝑒𝑙 Β·(1βˆ’π»πΈ)+𝑐𝐸𝑙𝑒𝑐 ·𝐻𝐸 under the condition d𝐻𝐸 = 0. d𝑑 Cost Index for Constant Electric Power Supply πΆπΌπ‘ƒπΈπ‘™π‘’π‘π‘‘π‘Ÿπ‘–π‘,π‘π‘œπ‘›π‘ π‘‘ =π‘π‘‡π‘–π‘šπ‘’+𝑃𝑆𝑒𝑝𝑝𝑙𝑦,𝐸𝑙𝑒𝑐·(π‘πΈπ‘™π‘’π‘βˆ’π‘πΉπ‘’π‘’π‘™) 𝑐𝐹 𝑒𝑒𝑙 under the condition 𝑃𝑆𝑒𝑝𝑝𝑙𝑦,𝐸𝑙𝑒𝑐 = π‘π‘œπ‘›π‘ π‘‘π‘Žπ‘›π‘‘. Cost Index for Constant Electrical Energy Consumption πΆπΌπΈπΈπ‘™π‘’π‘π‘‘π‘Ÿπ‘–π‘,π‘π‘œπ‘›π‘ π‘‘ = π‘π‘‡π‘–π‘šπ‘’ 𝑐𝐹 𝑒𝑒𝑙 under the condition d𝐸𝑆𝑒𝑝𝑝𝑙𝑦,𝐸𝑙𝑒𝑐 = 0. d𝑑 Table 4.1: Summary of cost-index for hybrid-electric aircraft

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