Effects of pressure and hydrogen addition to methane on the temperatures within a pressurized cylinder during the vehicle refueling of HCNG. (13th August 2019)

• Record Type: Journal Article
• Authors: Khab, Hayet; Chaker, Abla; Ziani, Lotfi
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 39(2019)
• Page Start: 22437
• Page End: 22444
• Publication Date: 2019-08-13
• Subjects: Hydrogen -- Methane -- Hythane -- Fast refueling -- Temperature rise -- Numerical simulation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.04.209
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Temperature increase in vehicle cylinder during the fast filling process keeps arousing the interest of many researchers. In this paper a new fuel consisting of hydrogen enriched natural gas called "HCNG", and the influence of temperature distribution and elevation in HCNG tank were studied. A two-dimensional axisymmetric computational fluid dynamics (CFD) model for fast filling of HCNG vehicle cylinder of 150-L is established. The simulation is based on the standard k-ε turbulence model, and a real gas state equation is considered to evaluate the properties of the HCNG. The numerical simulations were performed with hydrogen mole fraction of 0%, 8%, 15% and 20%; the results show clearly the effect of the addition of hydrogen in methane. The increase in the concentration of Hydrogen is observed to be leading to a temperature increase. Highlights: A CFD model for predicting filling process of HCNG and CHG tank is presented. Estimation of refueling final temperature for both hythane and hydrogen tanks. Effect of hydrogen addition to natural gas on temperature rise in the filling process of HCNG tank. Effect of initial pressure on temperature rise in CHG tank during the filling process. Evolution of the gas velocity during the filling processes.