Open AccessNumerical study on sealing performance of supercritical carbon dioxide compressor dry gas seal
Author(s) -
Jun Wu,
Xufeng Zhao,
Zhenxing Zhao,
Lu Dai,
Xingsheng Lao,
Weijian Lv
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/461/1/012046
Subject(s) - centrifugal compressor , gas compressor , leakage (economics) , supercritical fluid , volumetric flow rate , stator , axial compressor , materials science , seal (emblem) , dry gas , supercritical carbon dioxide , labyrinth seal , carbon dioxide , petroleum engineering , mechanics , mechanical engineering , engineering , chemistry , turbine , thermodynamics , physics , art , organic chemistry , chromatography , economics , visual arts , macroeconomics
Aiming at the serious problem of gap leakage between the stator and rotor of the supercritical carbon dioxide compressor, the dry gas seal scheme for centrifugal compressor of small S-CO 2 power system is designed in this paper. The sealing characteristics of the single-stage spiral groove dry gas seal in the S-CO 2 operating environment are studied by the large-scale commercial CFD numerical analysis software ANSYS CFX. The leakage characteristics of the S-CO 2 dry gas seal at different film thicknesses are obtained. The results show that the S-CO 2 dry gas seal leakage flow rate increases linearly with the increase of the film thickness. The dry gas seal leakage flow rate under different film thickness is 0.04%∼0.45% of the S-CO 2 compressor flow rate, which can meet the leakage requirements of the centrifugal compressor shaft end seal in the small S-CO 2 power system.