scholarly journals Design by analysis of deep-sea type III pressure vessel

2021 ◽  
Author(s):  
Valter Luiz Jantara Junior ◽  
Mayorkinos Papaelias
Keyword(s):  
Pressure Vessel ◽  
Deep Sea ◽  
Type Iii

A Ballast System for Automated Deep-Sea Ascents

2016 ◽  
Author(s):  
Matthias Golz ◽  
Florin Boeck ◽  
Sebastian Ritz ◽  
Gerd Holbach
Keyword(s):  
Environmental Impact ◽  
Environmental Contamination ◽  
Pressure Vessel ◽  
Deep Sea ◽  
Underwater Vehicles ◽  
Compressed Air ◽  
Hydraulic Pump ◽  
Unmanned Underwater Vehicles ◽  
The Past ◽  
Set Up

The efforts to discover the world’s oceans — even in extremely deep-sea environments — have grown more and more in the past years. In this context, unmanned underwater vehicles play a central role. Underwater systems that are not tethered need to provide an apparatus to ensure a safe return to the surface. Therefore, positive buoyancy is required and can be achieved by either losing weight or expanding volume. A conservative method is the dropping of ballast weight. However, nowadays this method is not appropriate due to the environmental impact. This paper presents a ballast system for an automated ascent of a deep-sea seabed station in up to 6000 m depth. The ballast system uses a DC motor driven modified hydraulic pump and a compressed air auxiliary system inside a pressure vessel. With regard to the environmental contamination in case of a leakage, only water is used as ballast fluid. The modification of an ordinary oil-hydraulic radial piston pump and the set-up of the ballast system is introduced. Results from sea trials in the Atlantic Ocean are presented to verify the functionality of the ballast system.

Effect of dome rigidity of Type III FW composite pressure vessel on stress of CFRP layer

2020 ◽  
Vol 2020.28 (0) ◽  
pp. 123
Author(s):  
Takashi SUNAGA ◽  
Yoshio ARAI ◽  
Wakako ARAKI ◽  
Noriyasu YAMADA
Keyword(s):  
Pressure Vessel ◽  
Type Iii ◽  
Composite Pressure Vessel

scholarly journals The NEL type III deep-sea camera / C.J. Shipek.

1957 ◽  
Author(s):  
C. J. Shipek ◽  
Keyword(s):  
Deep Sea ◽  
Type Iii
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