Investigation on diffusion process of water molecules in sulfur hexafluoride electric equipments based on CFD technique

Methods for alleviation of impacts of axial diffusion on decomposition products monitoring in gas‐insulated transmission lines

“…Compared with research studies on the diffusion process related to SF 6 [24, 25, 29], this article presents some experimental results to determine the diffusion coefficients and verifies the feasibility of the simulation models. In solving the diffusion problem in GIL, the improved methods proposed in this article are more specific and referable than those in previous research studies [22, 33]. As for the factors causing the axial diffusion, only the concentration gradient was considered in this article.…”

“…For example, Liu et al optimized the layout of sensors by modelling the diffusion process of H 2 O and H 2 S in GIL [22]. Zhou et al found that the slow diffusion of H 2 O made it difficult to measure the partial humidity at sampling ports [23]. However, due to the inadequacy of diffusion coefficient data, the above-mentioned studies have some limitations in gas monitoring in GIL insulation diagnosis.…”