【摘要】 太阳能与燃料电池技术相结合产生的合成气燃料是未来实现碳中和的绿色能源解决方案之一。本文提出了一个基于太阳能全光谱利用的固体氧化物电解池燃料制备系统，太阳光短波为共电解提供所需电力，长波为系统提供所需热量。建立了各部件的热力学模型，并对系统进行了热力学、经济及环境分析。本文从三个运行模式对系统的性能进行了分析，考虑独立的固体氧化物电解池（Solid oxide electrolysis cell,SOEC）系统，耦合回热的SOEC子系统以及太阳能耦合带回热的SOEC系统，在设计工况下三种模式的能效率和?效率分别为63.1%和62.5%,67.3%和65.8%以及15.0%和15.6%。系统的总成本率及CO₂排放率分别为9.79 USD/h和0.04 kg/kWh，且比?成本为0.086 USD/kWh。另外，探讨了SOEC操作参数对系统性能的影响，当电流密度、操作温度、压力和水蒸气的摩尔分数分别为0.64 A/cm²、1323.15 K、0.1 MPa和20%时系统的能效和?效达到最大值。更多还原

【Abstract】 Syngas fuel generated by solar energy integrating with fuel cell technology is one of the promising methods for future green energy solutions to carbon neutrality.This paper presents a fuel preparation system for solid oxide electrolytic cell （SOEC） based on full spectrum utilization of solar energy,The short wave of sunlight provides the power needed for the co-electrolysis and the long wave provides the heat needed for the system.The thermodynamic model of each component is established,and the thermodynamic,economic and enviro nmental analysis of the system is carried out.Overall exergy efficiency and exergy efficiency of the three modes are 63.1%and 62.5%,67.3%and 65.8%and 15.0%and 15.6%respectively under the design condition,considering the independent SOEC system,the SOEC subsystem with coupled heat recovery and the SOEC system with solar energy coupled heat recovery.The overall cost rate and CO₂emission rate of the system are 9.79USD/h and 0.04 kg/kWh,respectively,and the specific exergy cost is 0.086 USD/kWh.In addition,the influence of SOEC operation parameters on the system performance is discussed.When the current density,operating temperature,pressure and water vapor mole fraction are 0.64 A/cm²,1323.15 K,0.1 MPa and 20%,respectively,the energy efficiency and exergy efficiency of the system reached the maximum.更多还原