Pressure Response of Various Gases in a Pneumatic Resistance Capacitance System and Pipe

14th International Conference on Fluid Control, Measurements and Visualization

Peng, J.^1 ; Youn, C.^2 ; Tadano, K.^1 ; Kagawa, T.^1

Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama

4259, Japan^1

Azbil Corporation, Fujisawa Technology Center, 1-12-2 Kawana, Fujisawa-shi, Kanagawa-ken, Japan^2

关键词: Fuel cell vehicles;    High response speed;    Isothermal chamber;    Nozzle flapper;    Pressure propagation;    Pressure response;    Resistance capacitance;    Time constants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/249/1/012003/pdf
DOI  :  10.1088/1757-899X/249/1/012003

来源: IOP

【 摘 要 】

City gas, such as propane and methane, is widely used as a fuel in households and factories. Recently, hydrogen as a clean and efficient fuel has been proposed for fuel cell vehicles. However, few studies have investigated pressure control and response of gases considering their properties. This study investigated the static flow rate characteristics in an orifice with four gases - air, propane, methane, and hydrogen. Then, a pressure response experiment was performed using a pneumatic resistance capacitance system comprising an isothermal chamber and a nozzle flapper, and the time constant of the pressure response with various gases was analysed with a mathematical model. The simulation results agreed with the experimental data. Finally, the differences in pressure propagation in a pipe with various gases were explicated by a pressure response experiment. The results showed that the pressure response speed of hydrogen is faster than that of the other three gases because of its small molecular weight. Therefore, the pressure control equipment of hydrogen needs a high response speed.