核热高温制氢系统换热网络设计与优化

Design and Optimization of Heat Exchanger Network of High Temperature Electrolysis Hydrogen Production System with the Nuclear Heat

核能因其无碳、稳定和高能量密度的突出优势,与高温蒸汽电解技术耦合具有极大的潜力。因此,本文建立了核热高温蒸汽电解系统仿真模型,基于夹点分析方法优化不同过热蒸汽温度和SOEC电堆入口温度下系统的换热网络。结果表明,提高过热蒸汽温度会略微提高系统最小输出热量,而提高SOEC电堆入口温度能有效降低系统最小输出热量。因此,提高电堆入口温度并降低过热蒸汽温度对系统效率更有利,系统效率最高为72.59%。

Because of its outstanding advantages of no carbon,stability and high energy density,nuclear energy coupled with the high tem-perature steam electrolysis(HTSE)technology has great potential.In this paper,a simulation model of the HTSE system coupled with nuclear heat is established,to optimize the heat exchanger network of the system by the pinch analysis method under the different superheated steam temperatures and SOEC inlet temperatures based on pinch analysis method.The results show that increasing the superheated steam temperature can slightly in-crease the minimum heat output of the system.Increasing the inlet temperature of SOEC can effectively reduce the minimum output heat of the sys-tem.Finally,increasing the SOEC inlet temperature and reducing the superheated steam temperature are more beneficial to the system efficiency,of which the highest value is 72.59%.