Studying transmission of fuel storage bank to NGV cylinder in CNG fast filling station

Abstract

The exact modeling of the fast-fill process of Compressed Natural Gas (CNG)

Mathematical modeling of fast filling process at CNG refueling stations considering connecting pipes

“…As is shown in this figure growth rate for temperature at the beginning of the process is higher for the buffer storage system. The same trend in the temperature profile has been seen in previse studies (FarzanehGord et al, 2011(FarzanehGord et al, , 2007(FarzanehGord et al, , 2008Kountz, 1994;Deymi-Dashtebayaz et al, 2012;Farzaneh-Gord et al, 2012a;Farzaneh-Gord and Deymi-Dashtebayaz, 2013;Farzaneh-Gord et al, 2012b, 2014. The final temperature of the actual conditions may be less than the modeling value.…”

“…In this section, the numerical values has been compared with experimental data of George, (George and Mayeaux, 2014) and also with computed results of the previous works (Farzaneh-Gord et al, 2011, 2007, 2008Kountz, 1994;Deymi-Dashtebayaz et al, 2012;Farzaneh-Gord et al, 2012a;Farzaneh-Gord and DeymiDashtebayaz, 2013;Farzaneh-Gord et al, 2012b, 2014. The cylinder volume is 52 litters, initial pressure of on-board NGV cylinder is 72 bar and the other information about the geometric properties of pipes and reservoir tanks are provided in Table 1.…”

“…It is about 10 s for previous works (Farzaneh-Gord et al, 2011, 2007, 2008Kountz, 1994;DeymiDashtebayaz et al, 2012;Farzaneh-Gord et al, 2012a;FarzanehGord and Deymi-Dashtebayaz, 2013;Farzaneh-Gord et al, 2012b, 2014. It should be noted that, in previous works (Farzaneh-Gord et al, 2011, 2007, 2008Kountz, 1994;Deymi-Dashtebayaz et al, 2012;Farzaneh-Gord et al, 2012a;Farzaneh-Gord and DeymiDashtebayaz, 2013;Farzaneh-Gord et al, 2012b, 2014c, to determine the mass flow rate between the reservoir tanks and on-board NGV cylinder, the ideal mass flow rate is multiplied by a discharge coefficient. The discharge coefficient is usually selected using matching experimental and numerical values.…”

“…Their results showed that there was a temperature rise of at least 40 K through the fast filling process for real gas. Farzaneh-Gord et al (FarzanehGord et al, 2011;Deymi-Dashtebayaz et al, 2012) developed a theoretical analysis based on real gas assumptions to study effects of storage system type on performance of CNG refueling stations. The results present both of storage systems have advantages over the other.…”

Comparison of hydrogen and methane storage by means of a thermodynamic analysis

“…Consequently, a comparison of the behavior of hydrogen and natural gas with respect to typical thermodynamic processes aligned with storage is revealing. The major component of natural gas is methane with a percentage in the range of 70%e99% [6]. For simplification purposes, only methane is analyzed representative of natural gas.…”