A detailed bottom-up cost evaluation of SOEC systems in the range of 10–100 MW was carried out based on recent experimental results in the SOEC field. Capital costs of installed SOEC systems were evaluated starting from raw SOEC materials. Two scenarios were defined, assuming different capacities of SOEC units, yearly production capacities of SOEC cells and stacks as well as operating conditions of manufacturing lines. It resulted in installed capital costs of 309–395 €/kW for SOEC units integrated into power-to-methane plants (reference case) and of 380–494 €/kW for stand-alone SOEC units. This highlights the cost reduction potential of the SOEC technology when thermally coupled with a steam source. These costs were compared with previous capital cost estimates for future SOEC, proton exchange membrane (PEM) and alkaline electrolysis systems available in the literature. A sensitivity analysis allowed to identify which parameters have the highest impact on installed system costs. In the least favorable conditions, it was estimated that they could raise up to 494–618 €/kW for SOEC units in the reference case and up to 573–727 €/kW for stand-alone SOEC units.

根据最近在SOEC领域的实验结果，对10至100 MW范围内的SOEC系统进行了自下而上的详细成本评估。从原始SOEC材料开始评估已安装的SOEC系统的资本成本。定义了两种情况，假设SOEC单元的容量不同，SOEC电池和电池堆的年生产能力以及生产线的运行条件。集成到沼气发电厂的SOEC装置的安装资本成本为309-395欧元/千瓦（参考案例），独立SOEC装置的安装资本成本为380-494欧元/千瓦。当与蒸汽源热耦合时，这突出了SOEC技术的降低成本的潜力。将这些成本与之前针对未来SOEC的资本成本估算进行了比较，质子交换膜（PEM）和碱性电解系统可从文献中获得。通过敏感性分析，可以确定对安装的系统成本影响最大的参数。在最不利的条件下，据估计，在参考案例中，SOEC装置的价格可提高至494–618欧元/千瓦，独立SOEC装置的价格可提高至573–727欧元/千瓦。