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News and Projects


JG Maritime Engineering Ltd. was attending OTC2014 in Houston, Tx

Paper Number: OTC-25148-MS
Title: Wave Energy Converter (WEC) - Formulation of Numerical Method to Predict Fluid-Structure Interaction and Wave Energy Potential
Author: Jóannes Gullaksen, JG Maritime Engineering Ltd

Abstract
Cost of energy is a critical factor to the success of Wave Energy Converters (WEC), in order for wave energy converters to compete with other forms of renewable and fossil-fuelled power generation. Essentially, the energy converted into electricity by a WEC is a function of the resource the converter is placed in, the converter's prime mover, and the converter's power take-off system. This is a dynamic system and changes to one aspect can have a significant influence on another.
Kinematics and kinetics are fundamental in fluid-structure interaction and design for optimizing wave energy capture performance, as well as loadings for mooring and structural analysis. The following analysis domains are covered in this paper: 1) physical description of variables affecting wave energy capture performance 2) the kinematics of wave energy converter motion, i.e. the geometrical aspects of motion (variables, reference frames and transformations, 3) the kinetics of wave energy converter motion, i.e. the study of the forces acting on the wave energy converter and the motion they produce, 4) combining the wave energy converter kinematics and kinetics to obtain a dynamic model and 5) description of numerical solution method.
The paper presents the mathematical formulation with numerical method which can be used together with laboratory testing of a WEC. The combination of numerical computations and laboratory testing can be used to produce results to predict how the WEC responds to real wave conditions.

Purchase: https://www.onepetro.org/conference-paper/OTC-25148-MS



Floatability / Risk Assessment Project

Floatability / Risk Assessment According to IMO Circular MSC.1/Circ.1380

This project is considering the impact of open watertight doors on the vessel operation and survivability when determining whether a watertight door may remain open during navigation under SOLAS regulation II-1/22 (paragraph 4) (previous SOLAS regulation II-1/15, paragraph 9.3).


The floatability assessment is for the purpose of determining the impact of open watertight doors on ship survivability under SOLAS regulation II-1/22.4 (previous SOLAS regulation II-1/15.9.3). The project scope is to cover relevant requirements in the IMO Circular MSC.1/Circ.1380 “Guidance for watertight doors on passenger ships which may be opened during navigation”.

The project also cover intact and damage stability information booklets and updates to damage control and watertight integrity plans. Calculations are carried out using the software program “AutoHydro-Pro” version 6.5.0.  Read more


R&D Projects

Wave Energy Converter and Energy Capture Performance

Cost of energy is a critical factor to the success of wave energy converters, in order for wave energy converters to compete with other forms of renewable and fossil-fuelled power generation. The key factors affecting the cost of energy of marine renewable devices include performance, capital costs, operating & maintenance costs and risks, e.g. due to offshore environment. Changes to the design of wave energy converters can affect both performance and costs simultaneously.  Read more

The software project is aimed at to look in more detail at performance, capital costs, operating & maintenance costs and risks, and some of the key factors that affect it. The project dedicated to providing robust, full-featured, commercial-quality, and wave energy converter design support on a wide variety of platforms.  Read more

Basic Naval Architecture Calculations

JG Maritime Engineering Ltd is planning a complete hydrostatics and stability calculations program for naval architects, ship designers and marine engineers. Whether it is hull geometry, hydrostatics and stability, or ship motions, sea loads and structural analysis, each modules will be based on the same model in an integrated system and used interactively in a common graphical user environment.  Read more