Gas supply device and gas supply method

1. A gas supply device comprising:

a storage container that accumulates liquefied gas;

a vaporizer for vaporizing liquefied gas derived from the storage container;

a compression device that compresses gas vaporized from the liquefied gas in the vaporizer,

a pressure accumulator that accumulates gas compressed in the compression device;

a supply path linked to a dispenser from the pressure accumulator; and

a cooling circuit in which a heating medium circulates between a heat exchanger that cools gas flowing in the dispenser and the vaporizer;

wherein in the cooling circuit, a heating medium tank is provided in a part downstream of the vaporizer in a circulation direction of a heating medium, the heating medium tank temporarily accumulating a heating medium.

2. The gas supply device according to claim 1 , wherein a refrigerator is connected to the cooling circuit so as to be in parallel to the vaporizer.

3. The gas supply device according to claim 1 , wherein an exhaust path that exhausts gas vaporized in the vaporizer is provided.

4. The gas supply device according to claim 1 , wherein a gas side inflow path that guides gas in the storage container to the compression device is connected to the storage container.

5. The gas supply device according to claim 1 , wherein the compression device comprises:

a compressor that compresses gas; and

a detour that detours the compressor.

6. The gas supply device according to claim 1 , wherein the compression device comprises:

a plurality of compression portions including a first compression portion, and a second compression portion that is a compression portion at a stage subsequent to the first compression portion;

a cooling flow path provided with a cooler;

a bypass flow path that bypasses the cooler; and

a switching mechanism that switches connection of the first compression portion and the second compression portion between the cooling flow path and the bypass flow path.

7. A gas supply method of supplying a dispenser with gas, the method comprising:

causing liquefied gas accumulated in a storage container to flow out of the storage container;

vaporizing, in a vaporizer, the liquefied gas flown out from the storage container;

compressing, in a compression device, gas vaporized in the vaporizer; and

supplying a dispenser with the gas compressed in the compression device directly or via a pressure accumulator, and

circulating a heating medium in a cooling circuit between a heat exchanger that cools gas flowing in the dispenser and the vaporizer,

wherein in the cooling circuit, a heating medium tank is provided in a part downstream of the vaporizer in a circulation direction of a heating medium, the heating medium tank temporarily accumulating a heating medium.

8. The gas supply method according to claim 7 , wherein a heating medium that has cooled the gas in a heat exchanger provided in the dispenser is introduced into the vaporizer to vaporize the liquefied gas in the vaporizer.

9. The gas supply method according to claim 7 , wherein when a temperature of gas to be sucked into the compression device is detected becoming a temperature higher than a predetermined temperature, a switching mechanism is switched such that in the compression device, gas discharged from a compression portion bypasses a cooler.

10. The gas supply method according to claim 7 , wherein when in a cooling circuit in which the heating medium circulates, a temperature of a heating medium is detected becoming a temperature higher than a predetermined temperature, the heating medium is cooled by a refrigerator.

11. The gas supply method according to claim 7 , wherein at least part of gas vaporized in the vaporizer is exhausted from an exhaust path.