Being aware of the fact, that the marine industry is constantly moving towards higher demands and standards, NAVAL – DME is ready to provide technical support to meet the client’s requirements. Based on our experience in the field of BWTS retrofits, we have developed a flexible and adjustable process, which utilises the 3D scanning technology together with the new generation CAD. Thus we are able to address all key aspects for a successful retrofit implementation.
Techno-economic study
The techno-economic study, a highly instrumental tool, offers the ship-owner financial and technical data analyses in a direct comparison between different systems. Consequently, a wide range of regulations and technical solutions for the BWT system allows the client to shortlist and select the most suitable system according to the vessel’s requirements.
3D laser scanning and on board survey
A 3D laser scanning survey captures the space layout of a vessel and everything, that is contained within, in hundreds of thousands of points, from which a 3-dimensional point cloud is generated. Our office, optimising the project workflow and providing both specialised technicians and equipment, offers fast and precise services. During the 3DLS survey we evaluate the most ideal BWTS installation location. Once all the necessary data has been collected, a point cloud is created in order to be used in the next stages.
Feasibility Study
The feasibility study aims to configure different BWT systems through designed 3D models. In this stage, our team creates 3D models with BWTS pipelines and equipment according to the client’s selection between several BWTS manufacturers. That way, the ship-owner can see the advantages and disadvantages of the various systems and visualise, how the BWTS could be installed, in order to make the right choice. The final design will be used for the next stage of a detailed concept design.
Detailed Engineering
The full engineering study consists of tree leading tasks, BOMs and technical details, construction drawings and electrical studies. The submission to the class is also included in the procedure and contains the updated plans/drawings, construction drawings of the foundations, electrical load analyses etc. Finally, the owner receives a technical specification with guidelines for a step-by-step successful installation.
Class Approval Process
Working with almost every classification society NAVAL – DME is able to take responsibility for the supervision of the entire class submission process up to the final approval. Our team prepares all the necessary documentation and submits it to the designated classification society.
Prefabrication Process
NAVAL – DME responds to the customer’s needs and offers a turn-key engineering solution for a ballast water treatment system. This includes the full engineering study (drawings, list of materials, arrangements, etc.), the class submission, the spool’s prefabrication and transportation, as well as the technical support of our attending engineering during the installation. In an advantageous way, the expenses are reduced, the time required for assembly is mitigated and the installation process is minimised. Thereafter, the dry docking time is shortened and more cost effective.
SCRUBBER RETROFITS FROM 3D LASER SCANNING TO DETAILED ENGINEERING
The more attention is paid to the protection of the marine environment, the more we are led to stricter emission requirements. The MEPC 70 determined, that the sulphur content of fuel oil used by ships globally is not to exceed 0.50% m/m as of January 1, 2020. Furthermore, the recent MEPC 71 ruled out a possible delay of the 2020 implementation date. As a reliable partner in such a difficult situation, we bring together our knowledge and experience, in order to offer a comprehensive service, even for such a complicated and expensive retrofit as the EGC system is. Our approach is focused on helping our customers navigate through this complex financial and engineering retrofit.
TECHNO-ECONOMIC STUDY
Due to its complexity and size, the installation of a scrubber is a difficult task. Within the framework of a techno-economic study, we bring together economic and technical data in a report with cost curves of different systems, in order to make the choice easier for the client.
3D LASER SCANNING
At the start of a scrubber retrofit, it is considered necessary to scan the vessel’s funnel. After a 3D laser scanning survey, we collect all the required data in order to create a 3D point cloud, which will be used in the next stages, feasibility, concept design and engineering, where a high accuracy is required. With an accurate point cloud 3D modelling becomes more detailed, which inherently improves the installation process.
DETAILED ENGINEERING
The detailed engineering includes all the mechanical drawings, the BOMs, the construction DWGs and the necessary electrical studies. All the documentations are submitted to the classification society, while the technical specification containing the installation configurations is delivered to the owner. During the engineering phase, all parties, the classification society, the owner, the shipyard and the consulting office, collaborate, to ensure the proper implementation of the scrubber exhaust gas cleaning system.
FEASIBILITY STUDY
A scrubber could be a huge structure, that is built into the ship’s funnel. Depending on the needs of each manufacturer each EGCS may be different from the others. Therefore, it seems necessary to study the installation possibilities of each individual scrubber. During the feasibility study we create a virtual model using the 3D point cloud with EGCS main piping and equipment, in order to present a complete solution. The owner can comprehend the installation pattern of each scrubber and make an informed decision.
