Economic Analysis Between Diesel and SOFC Electricity via Fusion-Biomass Hybrid Model
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ORIGINAL RESEARCH
Economic Analysis Between Diesel and SOFC Electricity via FusionBiomass Hybrid Model Hoseok Nam1
•
Ryuta Kasada2 • Satoshi Konishi3
Ó Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract The fusion-biomass hybrid model system, which takes waste biomass from municipal and agricultural areas as well as forests as feedstock, produces either diesel through the Fischer–Tropsch (FT) reaction or electricity by the solid oxide fuel cell (SOFC). This system produces synthesis gas by endothermic pyrolytic gasification using high temperature fusion heat. A temperature of over 700 °C of exterior thermal heat from the fusion reactors with a duel cooled lithium lead blanket and its technical extension bring about biomass gasification to produce maximum amounts of chemical energy and synthetic gas, from feedstock. First, synthetic gas that contains hydrogen (H2) and carbon monoxide (CO) can be converted into artificial diesel (–CH2–), which is regarded as ‘‘carbon–neutral’’. The other is to generate electricity by putting synthetic gas into SOFC at various scales, not only at the plant scale but also at the residential scale. This paper aims to conduct an economic analysis of the fusion-biomass hybrid model by comparing diesel and SOFC electricity under the assumption of the investment of a biomass plant with an FT reaction facility and one with SOFC. A sensitivity analysis is performed applying diesel price, electricity price, SOFC efficiency, diesel subsidy, and fusion heat cost. These results can help in targeting which products are economically justified in the circumstances of variable environmental policies under different policies and economic situations, which would have a significant impact on commercial fusion designing. Keywords Nuclear fusion Biomass gasification Economic analysis Diesel Hydrogen System dynamics List of B Bp Bs D Ep Fc G Ge GI n NFc NIAF
symbols Diesel (kg) Diesel price ($/kg) Diesel subsidy ($/kg) Depreciation rate Electricity price ($/MWh) Feedstock cost Synthetic gas (kg) Energy value of synthetic gas (MJ) Gross income Lifetime of system Fusion heat cost ($/MWh) Net income after tax
& Hoseok Nam [email protected] 1
Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
2
Institute of Material Research, Tohoku University, Sendai, Miyagi 980-8577, Japan
3
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
O&M Oh SD Seffi SOFC T TCI i t l
Operation and maintenance ($) Annual operating hours (h) System dynamics SOFC efficiency (%) Solid oxide fuel cell Tax rate (%) Total capital investment ($) Interest (discount) rate (%) Operating year (year) Conversion ratio of MJ to MWh
Introduction The fusion-biomass hybrid model is a zero-emission energy production concept that suggests the earlier introduction of fusion energy in the market. Over 700 °C of exterior thermal heat from fusion reactors with a high temperature blanket and its technical exten
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