  To combat climate change, we need to reduce emissions from the transport
sector. Synthetic fuels are a long-term solution for aviation, maritime and
heavy machinery. Large-scale use requires cost-effectiveness, efficient
production and resilience to price changes. In this case study, we
simultaneously optimize the cell voltage of the solid oxide electrolysis cell,
the heat exchanger network and the heat supply of a PtL-plant. PtL-efficiency
and production costs are used as objectives to generate multiple Pareto fronts
for future price scenarios. The results show that the sensitivity to price
changes has different impacts on design and operating parameters, which can
lead to unattractive solution domains in the Pareto front. Currently, synthetic
fuels can be produced at 1.83-2.36 EUR/kg. In the best case, at 1.42-1.97
EUR/kg and 3.88-4.28 EUR/kg in the worst case. This paper supports
decision-makers in planning PtL-plants to ensure sustainable synthetic fuel
availability on a global scale.
