High pressure gas charging system and high pressure gas charging method using the same

1 . A high pressure gas charging system comprising:

a charging container in which a high pressure gas is charged;

a fluid supply part connected to a first side of the charging container, and configured to supply incompressible fluid into the charging container before charging the high pressure gas;

a high pressure charging part connected to a second side of the charging container, and configured to charge the high pressure gas into the charging container in which the incompressible fluid is already supplied; and

a temperature sensor configured to measure a temperature of the incompressible fluid and a temperature of the high pressure gas,

wherein the incompressible fluid is supplied to the charging container until an inner pressure of the charging container reaches a predetermined pressure, and the incompressible fluid is removed to outside through the fluid supply part as the high pressure gas is charged into the charging container, and

wherein the temperature of the incompressible fluid in the charging container maintains same as or less than the temperature of the high pressure gas charged into the charging container.

2 . The system of claim 1 , wherein a pressure of the high pressure gas charged into the charging container and a pressure of the incompressible fluid remaining in the charging container maintain the predetermined pressure, as the high pressure gas is charged into the charging container.

3 . The system of claim 1 , wherein the fluid supply part comprises:

an outer supply line through which the incompressible fluid is received from outside; and

an inner supply line connected to the outer supply line and extending toward a lower space of the charging container,

wherein an end portion of the inner supply line extends to make contact with a lower portion of the charging container or extends towards a lower portion of the charging container.

4 . The system of claim 3 , wherein the charging container is inclined with respect to a ground by a predetermined angle, and the inner supply line extends towards the lower portion of the inclined charging container.

5 . The system of claim 1 , wherein the high pressure gas charging part comprises:

an outer charging line through which the high pressure gas is received from outside; and

an upper supply line connected to the outer charging line and extends toward an upper space of the charging container.

6 . The system of claim 1 , wherein the high pressure gas charging part supplies the high pressure gas charged in the charging container to outside by controlling a valve,

wherein the high pressure gas charging part comprises a fluid separator configured to remove the incompressible fluid included in the high pressure gas.

7 . A high pressure gas charging method comprising:

supplying incompressible fluid into a charging container through a fluid supply part connected to a first side of the charging container;

deciding whether a pressure of the charging container reaches a predetermined pressure; and

charging a high pressure gas into the charging container through a high pressure gas charging part connected to a second side of the charging container when the pressure of the charging container reaches the predetermined pressure, and removing the incompressible fluid to outside through the fluid supply part as the high pressure gas is charged into the charging container,

wherein the high pressure gas is charged and the incompressible fluid is removed until the high pressure gas is fully charged into the charging container, and

wherein the method further comprises: measuring, by a temperature sensor, a temperature of the incompressible fluid and a temperature of the high pressure gas, and the temperature of the incompressible fluid in the charging container maintains same as or less than the temperature of the high pressure gas charged into the charging container.

8 . The method of claim 7 , wherein in the charging the high pressure gas and removing the incompressible fluid,

a pressure of the high pressure gas charged in the charging container and a pressure of the incompressible fluid remaining in the charging container maintain the predetermined pressure.

9 . A high pressure gas charging system comprising:

a gas supply container configured to store a high pressure gas;

a fluid storage container connected to the gas supply container and configured to store incompressible fluid; and

a charging container connected to each of an upper portion and a lower portion of the fluid storage container, wherein the high pressure gas is charged into the charging container,

wherein the incompressible fluid stored in the fluid storage container is supplied to the charging container as the high pressure gas stored in the gas supply container is supplied to the fluid storage container,

wherein the high pressure gas in the fluid storage container is charged into the charging container as the incompressible fluid supplied to the charging container is supplied back to the fluid storage container, wherein the charging container is positioned higher than the fluid storage container such that a hydrostatic pressure is generated by gravity due to a height difference between the charging container and the fluid storage container, and wherein the incompressible fluid supplied to the charging container is supplied back to the fluid storage container due to the hydrostatic pressure generated by gravity.

10 . The system of claim 9 , wherein a temperature of the high pressure gas supplied to the fluid storage container and a temperature of the incompressible fluid supplied to the fluid storage container maintain a predetermined temperature.

11 . The system of claim 9 , further comprises:

a first pipe connected between the gas supply container and the fluid storage container, and having a first valve;

a second pipe connected between an upper portion of the fluid storage container and the charging container, and having a second valve; and

a third pipe connected between a lower portion of the fluid storage container and the charging container, and having a third valve.

12 . The system of claim 11 , wherein with the first valve and the third valve open (ON) and the second valve closed (OFF), the high pressure gas stored in the gas supply container is supplied to the fluid storage container through the first pipe, and the incompressible fluid stored in the fluid storage container is supplied to the charging container through the third pipe.

13 . The system of claim 11 , wherein with the first valve closed (OFF) and the second valve and the third valve open (ON), the incompressible fluid supplied to the charging container is supplied back to the fluid storage container through the third pipe, and the high pressure gas in the fluid storage container is charged into the charging container through the second pipe.

14 . The system of claim 9 , wherein the charging container in which the high pressure gas is charged is built in an external mobility, is detached and equipped in the external mobility, or is connected to a charging terminal extended from the external mobility.

15 . A high pressure gas charging method comprising:

injecting a high pressure gas to a fluid storage container from a gas supply container;

supplying incompressible fluid stored in the fluid storage container to a charging container, as the high pressure gas is injected to the fluid storage container;

supplying the incompressible fluid back to the fluid storage container from the charging container, when the high pressure gas is fully injected to the fluid storage container; and

charging the high pressure gas injected to the fluid storage container to the charging container, as the incompressible fluid is supplied to the fluid storage container, wherein the charging container is positioned higher than the fluid storage container such that a hydrostatic pressure is generated by gravity due to a height difference between the charging container and the fluid storage container, and wherein the incompressible fluid in the charging container is supplied to the fluid storage container due to the hydrostatic pressure generated by gravity.

16 . The method of claim 15 , wherein in the injecting the high pressure gas to the fluid storage container, a first valve connected between the gas supply container and the fluid storage container is open and a pressure of the high pressure gas is increased by a compressor, and then the high pressure gas stored in the gas supply container is supplied to the fluid storage container,

wherein in the supplying the incompressible fluid stored in the fluid storage container to the charging container, a second valve connected between an upper portion of the fluid storage container and an upper portion of the charging container is closed and a third valve connected between a lower portion of the fluid storage container and a lower portion of the charging container is open, and then the incompressible fluid is supplied to the charging container due to a pressure generated by the high pressure gas toward the fluid storage container,

wherein in the supplying the incompressible fluid back to the fluid storage container and charging the high pressure gas to the charging container, the first valve is closed and the second valve is open, and then the incompressible fluid is filled to the fluid storage container from a lower portion of the charging container through a lower portion of the fluid storage container, and thus the high pressure gas is charged to the charging container from an upper portion of the fluid storage container through an upper portion of the charging container.