考虑BoP热区内部件间热传递的SOFC系统建模仿真

高温固体氧化物燃料电池（solid oxide fuel cell，SOFC）是一种高温高效的氢电转换装置，其高温工作环境对系统电堆和辅助部件（balance of plants，BoP）的保温绝热提出极高要求。考虑SOFC系统BoP热区内多部件之间存在的热交换，结合高温系统有限的可测数据，开展基于热效率?传热单元数法（ε-NTU法）的高温SOFC系统集总建模；通过模拟BoP热区内零部件与环境的热交换，实现BoP热区内多部件间的传热和温度定量分析；通过设计简洁的反馈控制器实现系统的自启动和稳定运行仿真。仿真结果表明，BoP热区整体保温绝热起温度均衡作用，有利于尾气余热对进气气体的进一步加热，也可适当降低设备最高温度，有利于系统长期运行。

Modeling and Simulation of SOFC System with Heat Transfer among BoP Components

High temperature solid oxide fuel cell (SOFC) is a high temperature and efficient hydrogen-electric conversion device. Its high temperature operating environment puts forward higher requirements for thermal insulation of stack and balance of plants(BoP) in the system. In this paper, a lumped SOFC system model is established based on the thermal efficiency-heat transfer unit number method (ε-NTU method), in combination with limited measurable parameters for high-temperature system.Quantitative analysis of components temperature and heat transfer among components can be achieved by heat exchange simulation between components and BoP hot-box environment. A simple feedback controlleris designed for system self-starting and operation. Results show that the BoP hot-box plays the role of temperature balance, which is benefit for waste heat utilization by heating the inlet gas, and lower the highest equipment temperature for a longer system lifetime.