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Ocean thermal energy is formed by temperature difference between sea surface and deep sea. Underwater glider is a new kind of autonomous underwater vehicle. It ascends and descends between the sea surface and deep sea periodically by adjusting its net buoyancy. Thermal underwater glider can harvest ocean thermal energy through the utilization of phase change material (PCM) and convert it into mechanical...
Underwater glider is one of the most popular platforms for long term ocean observation. Underwater glider driven by ocean thermal energy extends the duration and range of underwater glider powered by battery. Thermal engine is the core device of underwater glider to harvest ocean thermal energy. In this paper, (1) model of thermal engine was raised by thermodynamics method and the performance of thermal...
Thermal underwater glider (TUG) is a new trend for the development of autonomous underwater vehicles, it is composed of traditional underwater glider (UG) with thermal engine which is used for harvesting and transforming ocean thermal energy. The main problem of TUG is the mismatch between gliding motion pattern and phase change process. The reason is that low heat conductivity of PCM leads to taking...
A hybrid underwater glider Petrel-II is presented in this paper. It combines behaviors of traditional autonomous underwater vehicle and those of autonomous underwater gliders. It can dive along a saw-tooth trajectory in the gliding mode and autonomously cruise in the level-flight mode. It is characterized by long endurance, long fight range, high cost efficiency, and good maneuverability. The hydrodynamic...
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