Initial Development of A Low-Cost and Efficient Closed-System Buoyancy Engine of A Hybrid AUV Model

Arie Sukma Jaya, Hadi Wahyudi


The design of a Hybrid Autonomous Underwater Vehicle (HAUV) has been known to accommodate the efficiency of a sea glider and the maneuverability of an Autonomous Underwater Vehicle (AUV). The HAUV might have a greater capability to extend the range of underwater missions such as Intelligence, Surveillance, and Reconnaissance (ISR). One of the important parts of the HAUV is the buoyancy engine system. This study investigated a low-cost and effective model of a buoyancy engine system. The model consists of the storage of working fluids in a dry environment and an immersed model of a HAUV with float within the body of the vehicle model. This study uses three types of working fluids: air, vegetable oil, and water. The performance of the buoyancy engine systems was evaluated by injecting the working fluid into the float within the body. This study indicated that the buoyancy engine system with a float and oil has better buoyancy performance and buoyancy response compared to air and water. The buoyancy engine system with a float and oil can work with a volume fraction of the fluid 25% smaller than that of water, and 40% smaller than that of air. Since the amount of volume transferred is related to energy use by the driving motor, the results indicate that a system with oil can have higher level of energy use efficiency compared to the other two working fluids. This study shows the potential of a buoyancy engine system with a float and oil to be further developed in an efficient HAUV vehicle.


Hybrid; AUV; buoyancy; engine; low-cost; efficient

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