Techno Economic Study
Techno Economic Study

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.

Class Approval Process
spool drawing1
spool construction prefabrication process

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.



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.

Techno Economic Study


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.


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.


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.