Systems and techniques for compressed air energy storage and regeneration thereof are described herein. A compressor for compressed air energy storage and regeneration thereof can include a housing, a actuator, and a heat exchanger. The housing can define a volume. The actuator can be operable to expand the volume and compress the volume. The heat exchanger can be located at least partially within the housing. The heat exchanger can be configured to compress when the actuator compresses the volume, expand when the actuator expands the volume, and transfer heat with a working fluid.

Systems and techniques for compressed air energy storage and regeneration thereof are described herein. A compressor for compressed air energy storage and regeneration thereof can include a housing, a actuator, and a heat exchanger. The housing can define a volume. The actuator can be operable to expand the volume and compress the volume. The heat exchanger can be located at least partially within the housing. The heat exchanger can be configured to compress when the actuator compresses the volume, expand when the actuator expands the volume, and transfer heat with a working fluid.

Disclosed is a variable volume hydrogen container or hydrogen compressor including a variable vessel configured to expand due to hydrogen filling and to compress or discharge the hydrogen while contracting, a pressure vessel configured to receive the variable vessel, at least one of opposite ends of the pressure vessel being open, a vessel wire wound around the pressure vessel in a radial direction, a vessel cap configured to seal the at least one open end of the pressure vessel, a vessel frame configured to support a vessel assembly constituted by the vessel cap and the pressure vessel, a frame wire wound around the circumference of the vessel frame, an embrittlement blocking member disposed so as to overlap the vessel cap, the embrittlement blocking member being configured to block hydrogen from penetrating into the vessel cap, and a transmitted hydrogen discharge hole configured to discharge hydrogen to the outside.

Disclosed is a variable volume hydrogen container or hydrogen compressor including a variable vessel configured to expand due to hydrogen filling and to compress or discharge the hydrogen while contracting, a pressure vessel configured to receive the variable vessel, at least one of opposite ends of the pressure vessel being open, a vessel wire wound around the pressure vessel in a radial direction, a vessel cap configured to seal the at least one open end of the pressure vessel, a vessel frame configured to support a vessel assembly constituted by the vessel cap and the pressure vessel, a frame wire wound around the circumference of the vessel frame, an embrittlement blocking member disposed so as to overlap the vessel cap, the embrittlement blocking member being configured to block hydrogen from penetrating into the vessel cap, and a transmitted hydrogen discharge hole configured to discharge hydrogen to the outside.