中国电机工程学报2025，Vol.45Issue(18)：7167-7176,中插12,11.DOI:10.13334/j.0258-8013.pcsee.241030
多股流紧凑式换热器优化设计方法:高温电解制甲烷系统案例分析
Optimised Design Approach for Multi-stream Compact Heat Exchangers:Case Study of A High Temperature Electrolysis-based Power to Methane System
摘要
Abstract
In the context of the"dual carbon"goals and the rapid development of renewable energies,solid oxide electrolysis(SOE)based hydrogen production and its derivatives present a novel approach to addressing the consumption of renewable power.High temperature operation of SOE necessitates the balance of plants such as heat exchangers and fans to maintain the thermodynamic equilibrium of the system.Proper heat exchanger design is critical for enhancing system compactness and energy efficiency.This paper proposes a multi-objective optimal design method for multi-stream compact heat exchangers based on non-dominated sorting genetic algorithm.It optimizes both the dimensional parameters and fin configurations of the heat exchanger.It also optimizes the layer arrangement of the heat exchanger by taking the mean square deviation of cumulative heat load as the index.Focusing on power-to-methane systems,the study demonstrates that fin frequency is a key factor influencing system compactness.With the fin frequency increases from 444 to 786 m-1,the specific surface area of the heat exchanger increases from 643 to 1116m2/m3,while the friction factor and flow power consumption increase by 10.7％and 0.2 kW respectively.Optimizing the layer arrangement reduces the mean square deviation of cumulative heat load by 0.6 kW.For the gas-gas heat exchanger in power-to-methane system,compared with two-stream heat exchangers(28 kW),the compact four-stream heat exchanger(35 kW)reduces the volume by 88％.This method optimizes the dimension,fin configurations,and layer arrangements of multi-stream plate-fin heat exchangers,providing insights for the high-temperature application of multi-stream heat exchangers.关键词
固体氧化物/电解制甲烷/多股流紧凑式换热器/遗传算法/层排列Key words
solid oxide/power to methane/multi-stream compact heat exchanger/genetic algorithm/layer arrangement分类
能源科技引用本文复制引用
何芝飞,李承周,杨志平,杜智宇,王利刚..多股流紧凑式换热器优化设计方法:高温电解制甲烷系统案例分析[J].中国电机工程学报,2025,45(18):7167-7176,中插12,11.基金项目
国家重点研发计划项目(2023YFB4204000).National Key R&D Program of China(2023YFB4204000). （2023YFB4204000）
