基于太阳能全光谱利用的固体氧化物电解池系统性能分析  

Performance Analysis of Solid Oxide Electrolysis Cell System Based on Full-Spectrum Utilization of Solar Energy

作　　者：姚文岐 王江江[1,2] 邓宇 崔志恒 高月芬[1,2] 张旭涛[1,2] YAO Wenqi;WANG Jiangjiang;DENG Yu;CUI Zhiheng;GAO Yuefen;ZHANG Xutao(Department of Power Engineering,North China Electric Power University,Baoding 071000,China;Key Laboratory of Low Carbon and High Efficiency Power Generation Technology of Hebei Province,North China Electric Power University,Baoding 071000,China)

机构地区：[1]华北电力大学动力工程系,保定071000 [2]华北电力大学,河北省低碳高效发电技术重点实验室,保定071000

出　　处：《工程热物理学报》2024年第5期1264-1274,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重大项目(No.52090064);国家自然科学基金面上项目(No.51876064)。

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CO_(2)排放率分别为9.79USD/h和0.04kg/kWh,且比成本为0.086USD/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0.64A/cm^(2)、1323.15K、0.1MPa和20%时系统的能效和效达到最大值。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 CO_(2) emission rate of the system are 9.79 USD/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/cm^(2),1323.15 K,0.1 MPa and 20%,respectively,the energy efficiency and exergy efficiency of the system reached the maximum.

关 键 词：太阳能燃料 光谱分频 固体氧化物电解池 系统模拟 热力学分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]