中国电机工程学报2025，Vol.45Issue(14)：5413-5421,中插7,10.DOI:10.13334/j.0258-8013.pcsee.241348
实际气体多变压缩功直接积分的超临界二氧化碳离心式压缩机热力设计方法
Thermal Design Methods for Supercritical Carbon Dioxide Centrifugal Compressors Based on Direct Integration of Polytropic Compression Work of Actual Gases
摘要
Abstract
To address the instability issues in design algorithm for supercritical carbon dioxide compressors near critical points,a stable direct integration algorithm for polytropic compression work considering real gas effect is proposed.By decomposing the compression process into multiple sub-processes and numerically integrating the polytropic compression work,the Cauchy point sequence of the entire polytropic compression work is obtained.By increasing the number of sub-processes,entire polytropic compression work of any precision can be obtained.Then,in order to solve the problem of enthalpy increase distribution between compressor stages,a stage enthalpy increase distribution algorithm based on equality of specific speeds is proposed.Finally,main design processes of the supercritical carbon dioxide compressor are also presented.It is found that,the proposed direct integration algorithm for polytropic compression work has better stability than the traditional Schultz algorithm in the near-critical and supercritical regions,with a calculation deviation of less than 1%from the theoretical solution.Meanwhile,a one-dimensional design and numerical simulation are carried out on the main compressor of a 50 MW supercritical carbon dioxide power generation unit.It is found that the method presented can strongly support scheme design and performance estimation of carbon dioxide compressors.关键词
超临界二氧化碳发电/近临界工况二氧化碳压缩机/多变压缩功直接积分算法Key words
supercritical carbon dioxide power generation/real gas compressor/direct integration algorithm of polytropic compression work分类
能源科技引用本文复制引用
李凯伦,李红智,张一帆,孙山,但光局,李扬,王亚..实际气体多变压缩功直接积分的超临界二氧化碳离心式压缩机热力设计方法[J].中国电机工程学报,2025,45(14):5413-5421,中插7,10.基金项目
国家重点研发计划项目(2023YFB4102203). National Key R&D Program of China(2023YFB4102203). （2023YFB4102203）
