C-Job Naval Architects is launching an in-house developed trailing suction hopper dredger series. According to the ship design company, the modular design of the series will fill the gap between standard designs and fully tailored vessels.

The trailing suction hopper dredger (TSHD) fleet features maintenance, multifunctional, and capital dredgers each with varying hopper capacity. Each design in the C-Job series is modular. It can be used as is or adapted to better suit the intended operations.

‘The C-Job TSHD fleet offers the benefits of both a standard design combined with a fully tailored design and the opportunities it presents,’ says Basjan Faber, C-Job Naval Architects CEO. ‘We’ve noticed a mismatch where off-the-shelf TSHD designs will not match specific project profiles, while fully tailored dredgers can be seen as limiting itself to the type of project it can perform. Plus, any small adaptions to standard designs usually require a hefty fee. In comes the customisable C-Job TSHD series.’

Modular options

Modular options of the C-Job TSHD Fleet include modifying main parameters in addition to dredging operations and functionalities such as dredging depth, type of dredge pump, pump power, and discharge method. Additionally, the TSHD series allows for easy up- or downscaling of the hopper capacity ensuring any m3 size is made possible. All dredgers within the series will feature a Green Passport and Clean Design notation.

The first concept design released from the C-Job TSHD series is a 14,000-m3 multifunctional dredger. The dredger is optimised for shallow water performance and features two (extendable) suction pipes, self-unloading systems, and eco-friendly features.

Faber add: ‘The C-Job design philosophy has always been that a client should be closely involved in the entire ship design process, as it benefits the end product. We’re excited to take this philosophy to the next level and provide ship owners with our new and unique modular series. The C-Job TSHD fleet allows customisation while reducing engineering time. A win-win situation for our clients.’

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Automation process and hydrogen

C-Job R&D knowledge and tools support the customisable TSHD series. An automation process ensures any proposed changes can be quickly checked. The system will show how changes will alter the design and whether it is indeed feasible almost immediately.

The company’s research into hydrogen-based renewable fuels offers another possible customisation element.

‘In order to reduce greenhouse gas emissions in the maritime industry, we must consider hydrogen-based renewable fuels,’ explains Faber. ‘With technology progressing at an ever-increasing rate, what isn’t possible now – may be possible in five years’ time. Especially as it becomes more readily available and affordable.’

14,000-m3 multifunction dredger features

  • Twin gondola aft ship design
  • Available and optimised for shallow water performance
  • 14000 m3 V-shaped hopper
  • 2 x 1200 mm trailing suction pipes, up to 30m dredging depth
  • 2 x inboard dredge pump operating in both parallel (trailing) and in series (discharging)
  • Option for extended trailing pipe with submerged pump up to 100 m dredging depth
  • Pump ashore self-discharge system through;
  • Bow coupling and discharge pipeline
  • Rainbow system
  • 8 self-emptying bottom doors in one row
  • 4 x closed diffusion boxes for reduced turbulence and maximum control of trim during operation
  • Adjustable overflow system with anti-turbidity valve
  • Draghead gantries with swell compensation system
  • Jetwater system in hopper and on draghead

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