We are engaged in research on the use of food and energy resources in harmony with the marine ecosystem. We are conducting a water tank model experiment to investigate the interaction between structures and aquatic lives, simulation by a hydrodynamic and ecosystem coupled model, and an easy-to-use monitoring system for observing the aquatic lives. In the ocean, there are many issues that cannot be predicted by experiments and numerical analysis, so we will elucidate the issues for social implementation by field demonstrations. With the achievement of the SDGs and the realization of Society 5.0 in ocean use, we will aim for food and energy security, revitalization and sustainable development of the aging region.
Examples of field tests
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.
Ocean Demonstration Field off Kamaishi, Iwate Prefecture
The sea area off Kamaishi,Iwate Prefecture,was selected as demonstration fielf of marine energy.The local community played a central role in the development of a wave power generator using a linear generator and a field demonstration.Power can be generated from waves with higt efficiency by implementing an advanced control system.