SUMMARY

R&D of Energy

R&D of Environment

R&D of Ocean Space Utilization

1. SUMMARY

  The biggest challenge of human society in this century is to build a sustainable society. From the perspective of resources and energy, it is necessary to develop new resources and energy with a low environmental impact. In Japan, although the land area is small, the exclusive economic zone is vast, and it can be said that the potential of the sea for solving this problem is extremely large. In our laboratory, we are paying attention to ocean renewable energy such as wind, ocean current/tidal current, temperature difference, wave, and sun as an energy source.
   In this field, there is a global research competition for practical application. We are also conducting research on deep seabed mineral resource development, CO2 ocean sequestration as a measure against global warming, formation of fishing grounds by improving the marine environment, and logistics and resource storage facilities that use the ocean space and have a low environmental load. In order to lead these R&D and realization, we plan resource development such as ocean renewable energy and methane hydrate, and predict VIV/VIM behavior of riser and floating structure aiming for advanced technological development. We are also working on elemental technology development of marine platforms such as position retention and materials.

Low motion spur type  wind turbine	Idea of pull-up of resources in sea bed
Numerical simulation on VIV and VIM behavior

2. R&D of Energy

 Wind Turbibe 
   The amount of wind energy resources that can be developed in Japan is extremely small, estimated to be several million KW on land, but it is far higher than that on the ocean, and there is more energy resources than Japan's total power generation. .. On the other hand, the characteristics of the sea area around Japan suddenly become deeper when it goes offshore, so it is not possible to install a seabed type wind turbine like in Europe. We are proposing efficient floating offshore wind power generation. Recently, active researches such as improvement of motion characteristics of spar type offshore wind turbine with JMU and development of coupled response analysis method between wind turbine and floating body are being conducted.

Low motion spur type  wind turbine

Weight saving windmill float 　　Model Tast

Methane hydrate development system
   Since the methane hydrate development system, which exists in large quantities under the deep sea floor in Japan's exclusive economic zone, has poor methane hydrate productivity, a production method that secures the required production volume using a large number of shallow depth horizontal wells. Is assumed to be We are working on the concept development of a production system that specializes in methane hydrate for a system consisting of production wells, platforms (including mooring and subsea), treatment facilities, and pipelines.

3. R&D of Environment

   Since the methane hydrate development system, which exists in large quantities below the deep sea floor in Japan's exclusive economic zone, has poor methane hydrate productivity, a production method that secures the required production volume using a large number of shallow depth horizontal wells. Is assumed to be We are working on the concept development of a production system that specializes in methane hydrate for a system consisting of production wells, platforms (including mooring and subsea), treatment facilities, and pipelines.

4. R&D of Ocean Space Utilization

 For Japan, whose land area is narrow and dense, utilizing marine space for business, industry, logistics, and residential purposes is one of the important issues to consider. We are planning a super large floating system for utilizing the ocean space.

Offshore floating city

Semisubmarsible type floating base

Offshore floating logistics base