Dukui Zheng¹, Jingfa Li^1,*, Bo Yu¹, Zhiqiang Huang¹, Yindi Zhang¹, Cuiwei Liu²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.4, pp. 1-1, 2024, DOI:10.32604/icces.2024.011669

Abstract In the low and medium pressure urban gas pipe network, transporting the hydrogen-blended natural gas through polyethylene pipe is an important means to realize the large-scale delivery and utilization of hydrogen-blended natural gas. However, due to the characteristics of polymer material, polyethylene pipes will experience aging phenomenon, which will lead to the deterioration of performance and eventually result in brittle damage and failure. Therefore, it is of great significance to analyze and predict the lifetime of polyethylene pipe due to the aging in the hydrogen-blended natural gas environment to ensure the safe transportation. In this… More >

Guowei Feng¹, Qing Li^2,3, Yang Wang^1,*, Nan Lin⁴, Sixi Zha¹, Hang Dong¹, Ping Chen⁵, Minjun Zheng⁶

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.9, pp. 2139-2161, 2024, DOI:10.32604/fdmp.2024.053941 - 23 August 2024

Abstract High-density polyethylene (HDPE) pipes have gradually become the first choice for gas networks because of their excellent characteristics. As the use of pipes increases, there will unavoidably be a significant amount of waste generated when the pipes cease their operation life, which, if improperly handled, might result in major environmental contamination issues. In this study, the thermal degradation of polyethylene materials is simulated for different pressures (10, 50, 100, and 150 MPa) and temperatures (2300, 2500, 2700, and 2900 K) in the framework of Reactive Force Field (ReaxFF) molecular dynamics simulation. The main gas products,… More >