We study on the technologies of food and energy resources utilization in harmony with marine environment and ecosystem . Based on hydrodynamic, water tank test, numerical analysis, and field test are carried out to reveal the motion and the safety of floating platforms, and the interaction between the platforms and ecosystem. Especially, we focus on the motion analysis of flexible structures and water tank test using aquatic organisms. These research methods are validated by the field test.
Daisuke Kitazawa, Center for Integrated Underwater Observation Technology, Institute of Industrial Science, The University of Tokyo
(Department of Systems Innovation, Graduate School of Engineering, The University of Tokyo)
Models of our laboratory in actual sea
CDC: Controllable Depth Cage
A controllable depth cage was developed using a general cage and floats. The position of the cage was adjusted by the buoyancy of the floats based on the real-time vertical water quality profile. The feasibility of CDC was tested in Onagawa Bay, Miyagi Prefecture.
Automated eco ship 'Solar Boat' driven by solar power
An eco ship driven by solar power was developed. This is the first step of students toward sustainable and low-carbon societies. We won the 'Crewless Solar Boat Competition in Lake Biwa in 2018' in spite of the boat capsizing.
?? Group Work of Innovation Project (3A/3B) at Department of Systems Innovation, Graduate School of Engineering
Submergible cage using flexible hoses
A general cage made of polyethylene pipes could be submerged successfully by injection and ejection of air in flexible hoses in the pipes. We could prolong the aquaculture period and adjust the shipment time by culturing silver salmon at 10 to 20 m below sea surface, where water temperature is lower by 2 or 3 degrees than that at sea surface.
Motion controlled ship with wave energy harvester
Motion controlled ship with wave energy harvester was developed and its sub-scale model was tested in the real sea. The ratio of harvest of wave energy to improvement of comfort can be varied as necessary. The developed ship will be widely applied to fishing vessels for reduction in energy consumption, to working boats for acculate operation, and to pleasure boats for leisure. Visit the web site which introduces this project.
Submergible cage using step by step exchanging air and water
A large cage could be floated and submerged certainly by exchanging air and water in the polyethylene pipe step by step. This submergible case will be utilized in the area where high waves arise by typhoon attacks.