超临界二氧化碳布雷顿发电循环压缩机实验研究进展

Experimental research progress of supercritical carbon dioxide Brayton cycle compressor

压缩机是超临界二氧化碳(S-CO2)布雷顿发电循环(闭式循环)的核心部件。本文总结了国内外S-CO2压缩机实验研究进展,包括主要测试平台及最新实验测试结果,重点关注不同功率等级的S-CO2离心压缩机所采用的技术路线,从结构设计、气动性能以及相关运行测试问题等方面,对现有S-CO2离心式压缩机实验研究中存在的共性与特殊性问题进行了总结与分析。此外,中国科学院工程热物理研究所完成了国内首次MW级S-CO2闭式循环离心式压缩机多进口工况全载实验,最高实验转速32000 r/min,质量流量约13 kg/s,总压比接近2.0,等熵效率82%。本文对该实验测试平台及相关实验研究进展进行了详细介绍。

Compressor is the core part of supercritical carbon dioxide(S-CO2)Brayton power generation cycle(closed cycle).This paper summarizes the experimental research progress of S-CO2 compressor at home and abroad,including the main test platform and the latest experimental test results.It focuses on the technical routes adopted by different power levels of supercritical S-CO2 centrifugal compressor.The commonness and particularity existing in the experimental research of supercritical S-CO2 centrifugal compressor are summarized and analyzed,from the aspects of structural design,aerodynamic performance and related operation test issues.In addition,the Institute of Engineering Thermophysics,Chinese Academy of Sciences has completed the first full-load test of MW-level supercritical S-CO2 closed cycle centrifugal compressor under multiple inlet conditions,with the maximum experimental speed of 32000 r/min,mass flow rate of about 13 kg/s,total pressure ratio of close to 2.0,isentropic efficiency of 82%,and many test indexes reaching or exceeding the highest experimental results reported in the world.This paper introduces the experimental test platform and related facts of the experimental research in detail.