Expansion turbine and compressor-type high-pressure hydrogen filling system and control method for same

Abstract

The purpose of the invention is to provide an expansion turbine and compressor-type high-pressure hydrogen filling system with a simple configuration with which on-site construction costs can be reduced, only a small maintenance, management, and service load is required, and operation costs including cost for power consumption can be lowered, and furthermore that does not require a means for extracting energy generated in an expansion device and effectively using the energy to be provided externally such as a power generator and is applicable to temperature reducing system technology such as apre-cooler function in a final filling unit in a hydrogen station. A filling system that reduces hydrogen gas enthalpy by using an expansion turbine when pressure filling hydrogen gas accumulated athigh pressure to a tank 6 comprises a process that incorporates an expansion turbine and compressor 11 in an expansion turbine section.

Description

technical field [0001] The present invention relates to a high-pressure hydrogen expansion turbo-compressor charging system and a control method thereof. The high-pressure hydrogen expansion turbo-compressor charging system is suitable for use in hydrogen vehicles (hereinafter sometimes referred to simply as fuel cell vehicles) and the like. "Hydrogen vehicle") fuel hydrogen gas is charged from the hydrogen supply source to the fuel tank of the hydrogen vehicle, the precooler function, etc. Temperature drop system technology. Background technique [0002] When hydrogen gas used as fuel for hydrogen vehicles undergoes adiabatic expansion (isoenthalpic expansion) from a high pressure at a portion such as an expansion valve installed in a path filled with hydrogen gas, its properties result in a ratio reversal temperature (-58°C ) high region expansion, therefore, has the property of temperature rise after expansion due to the Joule Thomson effect. [0003] Therefore, in a hy...

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Problems solved by technology

[0006] On the other hand, fuel cell vehicles that are becoming popular now, due to the temperature limit required by the material of the fuel tank and the operating temperature limit of the fuel cell body components, the maximum temperature limit for hydrogen filling is 85°C

[0007] Moreover, due to the above-mentioned properties of hydrogen, if hydrogen filling is performed directly without any means, the temperature during hydrogen filling will exceed the maximum temperature limit of 85°C, the temperature limit caused by the material of the fuel tank, and the operating temperature of the fuel cell body components will be affected. Therefore, a method of arranging a cooling member such as a heat exchanger in the hydrogen charging path, and filling the hydrogen vehicle with the cooling member while cooling the hydrogen gas has been proposed. , and has been put into practical use (for example, refer to Patent Document 1)

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