that inland shipping has to make sure it can stay one step ahead if it is to retain this reputation. Hence there is expected to be more demand for the professional optimisa- tion of inland waterway vessels. Optimised vessels are greener and crucially they have significantly reduced fuel consumption and operational costs.


However, optimising barges is a challenging task. Constantly changing operational profiles, areas of service, water levels and the ever-existing interactions with riverbanks and beds provide an almost unsurpassed level of complexity. With this plethora of variables it is more important than ever to build and maintain a proper database of full-scale measurement data to validate theories and calculations.


Development of shallow water tests Model test results performed in deep water


10 report


have been validated extensively by full- scale trials. This has resulted in an extensive data base of validation material. Model tests performed in shallow water, however, have been less common up until now. Therefore, it is clear that new validation material is needed.


Over the past years MARIN has been developing corrections and procedures for model testing in shallow water. Recently, full-scale measurements were performed to validate these corrections, increasing the amount of available validation data and each addition adds to the quality of the next optimisation process.


Greenstream tanker tests At the be- ginning of 2011 model tests for an inland tanker built by Peters Shipyards were performed for three draughts and two water depths. As it is important to validate the


results of initial scale model tests with full-scale measurements, MARIN was very pleased with Peters Shipyards’ offer to do these measurements on board of its new vessel. MARIN can then validate and improve its knowledge on optimisation for shallow water conditions.


Then in March 2013 MARIN performed full-scale trials on the futuristic Green- stream tanker and validated the results of the model tests previously performed in the Shallow Water Basin. The model test results were extrapolated and corrected for tank wall effects.


Full-scale trials were performed at Vuile Gat, the Netherlands and the same water depths that had been tested at model scale were used. In addition, three draughts were tested. The initial speed trial results were compared with the speed power prediction


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24