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Compressed Gas Dispensing

IP.com Disclosure Number: IPCOM000246290D
Publication Date: 2016-May-24

Publishing Venue

The IP.com Prior Art Database

Abstract

Compressed gas dispensing methods using cascade dispensing from a first plurality of storage vessels and a second plurality of storage vessels. A compressor is used to provide very high pressure compressed gas for the second plurality of pressure storage vessels. Various methods are described for different sources 5 of the compressed gas. The methods are particularly suitable for dispensing hydrogen into storage vessels in vehicles.

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TITLE

Compressed Gas Dispensing

ABSTRACT


[0001] Compressed gas dispensing methods using cascade dispensing from a first plurality of storage vessels and a second plurality of storage vessels. A compressor is used to provide very high pressure compressed gas for the second plurality of pressure storage vessels. Various methods are described for different sources of the compressed

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gas. The methods are particularly suitable for dispensing hydrogen into storage vessels in vehicles.

BACKGROUND


[0002] There is growing interest to use hydrogen as a transportation fuel in cars, buses, trucks, and other vehicles. Hydrogen is generally stored in a fuel tank on-board

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the vehicles at high pressure. After most of the on-board hydrogen has been depleted, the pressure of the hydrogen in the fuel tank is reduced and the fuel tank must be refueled with hydrogen.


[0003] Industry desires improved methods and improved equipment for compressed gas dispensing.

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BRIEF SUMMARY


[0004] There are several aspects of the invention as outlined below. In the following, specific aspects of the invention are outlined below. The reference numbers and expressions set in parentheses are referring to an example embodiment explained

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further below with reference to the figures. The reference numbers and expressions are, however, only illustrative and do not limit the aspect to any specific component or feature of the example embodiment. The aspects can be formulated as claims in which the reference numbers and expressions set in parentheses are omitted or replaced by others as appropriate.

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[0005] Aspect 1. A method for dispensing a gas to a receiving vessel (111), the method comprising:

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transferring a first quantity of the gas from at least one of a first plurality of storage vessels (102, 103) or a gas source (114) to at least one storage vessel of a second plurality of storage vessels (104) via a compressor (105);

transferring a second quantity of the gas from the gas source (114) to a first storage vessel (102) of the first plurality of storage vessels using a pressure difference

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between the gas in the gas source (114) and the gas in the first storage vessel (102) to transfer the second quantity of the gas while simultaneously transferring a third quantity of the gas from the gas source (114) to the receiving vessel (111) using a respective pressure difference between the gas of the gas source (114) and the gas in the receiving vessel (111) to transfer the third

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quantity of the gas; and

transferring a fourth quantity of the gas from the at least one storage vessel of the second plurality of storage vessels (104) to the receiving vessel (111) using a respective pressure difference between the gas in the at least one storage vessel of the second plurality of storage vessels (104) and the gas in the

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receiving vessel (111) to transfer the fourth quantity of the gas, wherein the fourth quantity of the gas comprises at least a po...