热力发电2023，Vol.52Issue(11)：46-56,11.DOI:10.19666/j.rlfd.202302013
超临界二氧化碳动静压干气密封稳态性能和加热模式对比研究
Comparative study on steady performance and heating mode of supercritical CO2 hydrostatic-dynamic dry gas seal
摘要
Abstract
For enhancing the film stiffness of supercritical CO2(S-CO2)hydrodynamic dry gas seal and reducing the additional power consumption due to the installation of heater in the seal inlet line,a new structure of S-CO2 hydrostatic-dynamic dry gas seal with the heating of the ring body at the back of the static ring is proposed.Based on the conjugate heat transfer model,the pressure and temperature distribution of dry gas seal were simulated utilizing commercial software Fluent.The steady-state performance and flow field distribution of S-CO2 hydrodynamic seal,hydrostatic seal and hydrostatic-dynamic seal were compared and analyzed,and the flow and heat transfer characteristics and power consumption of S-CO2 hydrostatic-dynamic dry gas seals under different heating modes and heat temperatures were discussed.The results show that the film stiffness of the hydrostatic-dynamic dry gas seal is improved more than doubled compared with the hydrodynamic dry gas seal,while the leakage rate increased significantly by 35％at the same time.The power consumption under ring heating mode is 44％lower than that under direct gas heating mode,leading to better operating economy.It provides a new idea for the structure design and auxiliary system improvement of compressor dry gas seal in S-CO2 power generation system.关键词
超临界二氧化碳/干气密封/加热模式/气膜刚度Key words
supercritical carbon dioxide/dry gas seal/heating mode/film stiffness引用本文复制引用
江锦波,江鹏,彭旭东,彭建,洪先志,唐大全..超临界二氧化碳动静压干气密封稳态性能和加热模式对比研究[J].热力发电,2023,52(11):46-56,11.基金项目
国家自然科学基金项目(52075491,52076195) （52075491,52076195）
浙江省自然科学基金重大项目(LD21E050002)National Natural Science Foundation of China(52075491,52076195) （LD21E050002）
Natural Science Foundation of Zhejiang Province(LD21E050002) （LD21E050002）
