Low-temperature Dewar container and low-temperature high-pressure hydrogen storage system

Abstract

The invention relates to a refrigeration and low-temperature technology, and provides a low-temperature Dewar container. The low-temperature Dewar container comprises a low-temperature Dewar module; the low-temperature Dewar module comprises a hydrogen storage pressure bearing layer and a cold storage sandwich layer; a hydrogen accessing coil is arranged in the cold storage sandwich layer, is bentto extend in the cold storage sandwich layer, and is provided with a high-pressure hydrogen inlet and a high-pressure hydrogen outlet; and the high-pressure hydrogen outlet communicates with the hydrogen storage pressure bearing layer. The invention further provides a low-temperature high-pressure hydrogen storage system, which comprises the low-temperature Dewar container. As supercharging module and a cooling module cooperate for supercharging and cooling, the hydrogen density can be increased in a state of maintaining hydrogen phase to achieve the purpose of improving the hydrogen storagequality in the hydrogen storage pressure bearing layer; and compared with a traditional hydrogen storage technology, the hydrogen storage and release process can be realized under the conditions of lower pressure and higher temperature, and the cold storage sandwich layer can use the cooling capacity in the hydrogen storage and release process.

Description

technical field [0001] The invention relates to refrigeration and low temperature technology, in particular to a low temperature Dewar container and a low temperature high pressure hydrogen storage system. Background technique [0002] Hydrogen has abundant reserves, high combustion efficiency, and no pollution. It is one of the preferred new energy sources to replace fossil fuels. Hydrogen energy utilization is an organic system engineering, involving four key technologies of hydrogen preparation, storage, transportation and application. Since hydrogen is the lightest of all elements, it is gaseous at normal temperature and pressure. The density of hydrogen is 0.0899kg / m3, which is less than one ten-thousandth of water, so its high-density storage has always been a world-class problem. Safe, efficient and economical hydrogen storage technology has become a bottleneck for the practical and large-scale utilization of hydrogen energy. [0003] Hydrogen storage methods are di...

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Problems solved by technology

[0007] In summary, the three main hydrogen storage methods all have obvious defects. Metal hydride hydrogen storage: high operating temperature and cycle life problems, and is subject to the development process of new materials; high-pressure hydrogen storage: low weight hydrogen storage density, high-pressure safety Poor performance; liquid hydrogen storage: the liquefaction process consumes a lot of energy, and the low-temperature cold energy in the use process is difficult to effectively use, resulting in waste

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