Offshore structures & Numerical Offshore tank

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Rising oil prices, increased environmental awareness and energy security issues are driving the rapid development of renewable energy technologies and dependence on offshore resources. There is increasing need of floating plants, design of the plat form the riser pipe and its attachment have to be studied from the point of dynamic interaction among them due to the action of waves, currents and wind. Symmetrical platforms, spar type platforms, semi submersible platform with suitable connections to riser are some of the technological options. The development of an integrated platform, riser and its mooring are major technological constraints for the design of a floating plant and it has to be studied on priority basis in the coming years, through studies of various design options, simulations and model studies.

Studies need to be continued for getting a proper understanding of the materials

Study of breaking wave forces for optimizing the structural design with innovative construction techniques will help to reduce the cost of structures. Another way of reducing costs is to have facilities with multiple purposes rather than a single purpose. The breakwaters would also serve as shore protection devices from cyclones and tsunamis for the fishing community.

Land based wind mill technology is well developed and popular. They do not need the costly coastal land area for erecting the wind mills. Secondly the offshore wind mills experience larger wind speeds since there is no obstruction as on land. However, the design & construction of foundation for these wind mills in shallow waters is a challenge. In keeping with the newer advances, floating wind turbine platforms need to be studied.

Numerical Offshore Tank is a dynamic Simulator, capable of analyzing the complete hydrodynamics of production units as well as structural loads of mooring lines and risers.

The main goal of the facility is to complement model basin tests, simulating the whole production system behavior under a wide range of different environmental conditions (wave, wind and current), enhancing the accuracy of the whole analysis in a fast and in economical way. The facility of virtual environment with stereoscopic capabilities can simulate various elements like floating/fixed structure, risers, mooring lines/anchors, sea state, and sea bed topography in 3 D environments.

a) Objectives:

  1. Interface design to riser connections to floating bodies
  2. Analysis, Design, model studies of Fixed and Floating Platforms Moorings, Suction pile anchors
  3. Fixed and Floating Platforms for offshore wind turbine
  4. Studies on submarine pipeline for high energy environment
  5. To develop Numerical Offshore Tank Facility for offshore production systems for exploration or exploitation of resources

b) Participating Institutions:

National Institute of Ocean Technology, Chennai

c) Implementation Plans:

The design of sumps for drawing warm water and cold deep sea water for small islands will be optimized to minimize its weight and volume to facilitate its construction on land and towing and seating at offshore location in water depths of around 5 m.

Optimization of structural design for Wave forces (breaking & non breaking. Assessing the wave forces accurately and develop a cost effective structure to with stand high wave loads for which there is no code. The outcome of above research can be applied to other structures which are built in shallow coastal waters. The steps involved are:

The research institutes like IIT, NIT and universities will be involved in undertaking physical/ numerical models studies. For the research areas like wave structure interaction and design of substructure for wind turbine, the expertise available with research institutes outside the India will be utilized.

The expertise available with other countries in like TPN, Brazil will be utilized in developing numerical offshore facility. Also, the state of art research institutes like IIT will be involved in development of numerical tools and its validation. Offshore consulting companies like EIL/ONGC will be consulted it development stage to indentify the industrial requirement.

Infrastructure facilities / Lab requirements

  • Study of materials and deployment procedures for the cold water pipe.
  • Development of High Performance computing system with relevant hardware/software for computation and visualization.
  • Numerical modeling software for hydrodynamics and structural analysis.
  • 3 D Visualization/animation tools for simulating end product.
  • Networking with other MoES and other research institutes in the country.

Deep water applications like Desalination, Ocean Energy and Mining require several configurations of offshore platforms to be studied. While small model testing can be carried out in the IIT wave basin, slightly scaled up models need to be tested at sea. Models of various types of platforms with instrumented moorings can be tested in the open sea in a seafront located laboratory. Long term experiments can be carried out for motion response to include different waves and currents for the entire year. A large coastal wave basin with facilities to create 2 D and 3 D waves provides a unique capability within the country to conduct 2D and quasi-3 dimensional studies on structures and shorelines at medium to large scales

d) Deliverables:

  • A virtual reality facility for development of offshore structures .
  • Fixed and Floating platforms for offshore wind turbine.

e) Budget requirement : 68 crores

(Rs. In crores)

Budget Requirement
Name of the Scheme 2012-13 2013-14 2014-15 2015-16 2016-17 Total
Offshore structures & Numerical Offshore Tank 2 16 17 21 12 68

 

Last Updated On 04/07/2015 - 13:54
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