Gas supply device and gas supply method

Patent metadata

Field	Value
Publication number	US-10655784-B2
Application number	US-201615763979-A
Country	US
Kind code	B2
Filing date	Sep 30, 2016
Priority date	Oct 2, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A gas supply device includes 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, and a supply path linked to a dispenser from the pressure accumulator.

First claim

The invention claimed is:

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.

Assignees

• Kobe Steel Ltd

Inventors

• Fujisawa Akitoshi
• Nagura Kenji

Classifications

• F17C2225/036

  Very high pressure, i.e. above 80 bars · CPC title

• F17C2223/0153

  Liquefied gas, e.g. LPG, GPL · CPC title

• F17C2223/046

  in the liquid · CPC title

• F17C2223/043

  in the gas · CPC title

• F17C2250/043

  Pressure · CPC title