초록 ▼

The invention concerns a method for filling pressurized gas tanks, characterized in that the filling process is interrupted when the input pressure reaches a maximum filling pressure, the maximum filling pressure in the cylinder being calculated to match the most serious of the two following conditi

The invention concerns a method for filling pressurized gas tanks, characterized in that the filling process is interrupted when the input pressure reaches a maximum filling pressure, the maximum filling pressure in the cylinder being calculated to match the most serious of the two following conditions: nominal filling capacity or design temperature of the cylinders.

대표청구항 ▼

1. A method for filling a pressurized gas cylinder, comprising the steps of: selecting a predetermined filling rate; selecting the more severe of the following two conditions: nominal cylinder filling capacity or cylinder design temperature; calculating the maximum filling pressure in the cylinder t

1. A method for filling a pressurized gas cylinder, comprising the steps of: selecting a predetermined filling rate; selecting the more severe of the following two conditions: nominal cylinder filling capacity or cylinder design temperature; calculating the maximum filling pressure in the cylinder to match the selected condition; andfilling a pressurized gas cylinder with a gas at the predetermined filling rate;controlling an input pressure of the gas;comparing the input pressure and the maximum filling pressure; andending said step of filling when the input pressure reaches the maximum filling pressure. 2. The method of claim 1, wherein the maximum filling pressure is calculated according to the ambient temperature and the initial pressure in the cylinder. 3. The method of claim 2, wherein the ambient temperature and the initial pressure in the cylinder are measured before filling. 4. The method of claim 1, wherein the maximum filling pressure is calculated according to the filling rate. 5. The method of claim 1, wherein the filling rate is selected according to a desired filling rate and/or according to a desired filling time. 6. The method of claim 5, wherein the filling rate is selected according to the ambient temperature and the initial pressure of the gas in the cylinder measured before filling. 7. The method of claim 1, wherein the filling rate is expressed as a derivative of the input pressure in the cylinder as a function of time and is between 0.05 bar/s and 20 bar/s. 8. The method of claim 7, wherein the filling rate is expressed as a derivative of the input pressure in the cylinder as a function of time and is between 0.10 and 15 bar/s. 9. The method of claim 7, wherein the filling rate is expressed as a derivative of the input pressure in the cylinder as a function of time and is between 0.5 bar/s and 12 bar/s. 10. The method of claim 1, wherein the filling rate is selected either by the operator at the time of filling or automatically. 11. The method of claim 1, wherein the filling is controlled only using the input pressure in the cylinder. 12. The method of claim 1, wherein the cylinder is filled at a filling temperature calculated according to the initial pressure, the ambient temperature and the maximum filling pressure. 13. The method of claim 12, wherein the filling temperature is calculated according to the filling rate. 14. The method of claim 13, wherein the maximum filling pressure is calculated according to the initial pressure, the ambient temperature, the cylinder input gas temperature and the filling rate. 15. The method of claim 12, wherein the calculated filling temperature is lower than the ambient temperature. 16. The method of claim 1, wherein the cylinder is generally cylindrical in shape with a ratio of length L to diameter D, L/D, lower than 6. 17. The method of claim 16, wherein the cylinder is generally cylindrical in shape with a ratio of length L to diameter D, L/D, between 1 and 5. 18. The method of claim 1, wherein the maximum filling pressure (Pf100% mass) is calculated to match the nominal filling capacity of the cylinder and is calculated by the equation: Pf100⁢%⁢⁢massTamb=(a×LN⁡(V)+b)×(P⁢⁢0,15⁢°⁢⁢C.)+c×LN⁡(V)+d(1) where: a) Tamb is the ambient temperature in K;b) V is the cylinder filling rate in bar/second;c) P0 is the initial pressure in bar, and (P0, 15° C.) is the initial pressure normed to 15° C. in bar; andd) a, b, c, and d are coefficients determined by regression. 19. The method of claim 1, wherein the maximum filling pressure (Pf0.100% mass) is calculated to match the nominal filling capacity of the cylinder and is calculated by the equation: Pf100% mass=Tamb×[(a×LN(V)+b)×(P0,15° C.)+(c×LN(V)+d)]+(e+f×P0+g×V)×(Tr−Tamb)  (2) where: a) Tamb is the ambient temperature in K;b) Tr is the filling gas temperature in K;c) V is the cylinder filling rate in bar/second;d) P0 is the initial pressure in bar, and (P0, 15° C.) the initial pressure normed to 15° C. in bar; ande) a, b, c, d, e, f and g are coefficients determined by regression. 20. The method of claim 1, wherein the maximum filling pressure (Pf 85° C.) is calculated to match the cylinder design temperature and is calculated by a polynomial equation of the type: Pf85° C.=AAP0n+BBP0n−1+CCP0n−2+DDP0n−3+ . . . +ZZ where: a) P0 is the initial pressure in bar;b) n is an integer and is at least equal to 3; andc) and the coefficients AA, BB, CC, . . . , ZZ are polynomial functions of the filling rate specific to the filled cylinder and obtained by regression. 21. The method of claim 1, wherein the cylinder is generally cylindrical in shape with a ratio of length L to diameter D, L/D, between 1 and 4.