Searched for: subject:"hopper"
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Kalra, S. (author)
Dredging is an energy-intensive operation and, due to the nature of the process, there are large and rapid fluctuations in the power requirement. With the signing of the Paris Agreement, implementation of IMO 2020 and expansion of ECAs, the external pressures for the reduction of different emissions(CO2, SO<sub>x</sub>, PM, and/or NO<sub>x</sub>...
master thesis 2020
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de Roode, Dylan (author)
The International Maritime Organisation (IMO) is a specialized agency responsible for the safety and security of shipping and the prevention of marine and atmospheric pollution by ships. Air pollution is one of the contributors, CO2 emission is recognised as the biggest contributor to the increasing temperature of the Earth. Global warming is a...
master thesis 2020
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Vuijk, Wouter (author)
The common practice of designing a ship is to look for ships with similar specifications and alter it to the client's needs. This often leads to structurally redundant and therefore overdimensioned ship designs. Hence, much improvement could be expected from ship structures where optimization algorithms help advise in the design process. In this...
master thesis 2020
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Disberg, Coen (author)
This research focuses on the development and feasibility of an online grain size estimator for a trailing suction hopper dredger (TSHD), based on the mass balance within a hopper, and using hopper settling models. The idea of the grain size estimator is to use existing hopper settling models iteratively for a certain time window with ‘online’...
master thesis 2018
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Blekman, Luuk (author)
Since the 19th century hopper dredgers have been used for civil operations such as land reclamation and water way maintenance. In the past 25 years a trend of scale enlargement of hopper dredgers driven by economic and productivity reasons is seen. Scaling of the designs has effect on strength and fatigue assessment as well on settling of...
master thesis 2018
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Sloof, Ben (author)
Damen Dredging Equipment is a yard dedicated to the dredging industry. The yard specializes in the design, manufacture and supply of a wide variety of dredging tools. One of the tools Damen offers is the Trailing Suction Hopper Dredger(TSHD).<br/><br/>The performance of such a TSHD is described by its production: the amount of sediment loaded in...
master thesis 2017
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van den Hadelkamp, Rick (author)
Western shipyards have to distinguish themselves by complex ships with short delivery times. This entails that in most cases the production already starts while the engineering has not even been finished. If the pipes and cables are not routed when the steel plate are cut by the CNC machine, the associated penetrations have to be cut manually...
master thesis 2017
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Mensch, Bas (author)
A split hopper barge is a dredging vessel that can split over its longitudinal axis to discharge its cargo. To allow for such an operation, the barge consists of two half-hulls that are connected by hinges at the top and hydraulic cylinders at the bottom. Any forces that act at the interface between the half-hulls have to be transferred by the...
master thesis 2017
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de Jonge, Kyle (author)
Estimators at the production department of Great Lakes Dredge &amp; Dock Company use a number of models to make production estimates for a job. These models require the slurry concentration in the suction arm of a trailing suction hopper dredge (TSHD) as an input. Currently this concentration is estimated based on results of previous projects....
master thesis 2017
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Kamal, Emal (author)
The Trailing Suction Hopper Dredgers (TSHD) are typically used for the transportation of soil. The soil in the hopper can be removed by hydraulic transport using water jets and the discharge at the bottom level of the hopper. The soil fluidization and transportation is jet assisted. The unloading process can take quite some time; the unloading...
master thesis 2017
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Mohan, A. (author)
A previous work at Royal IHC, following the observation from sea trials of trailing suction hopper dredgers (TSHD) that the turning performance of bow tunnel thrusters significantly reduced at slow forward speeds, studied the flow behaviour and performance of bow tunnel thrusters at slow forward speeds using Computational Fluid Dynamics (CFD)....
master thesis 2017
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Schaap, T. (author)
In this master thesis the flow behavior and the performance of a bow tunnel thruster at slow forward vessel motion is studied using Computational Fluid Dynamics (CFD). The study analyzes the flow and the turning ability for a cylindrical cross-section and the effect of changing the cross-section of the bow tunnel thruster. At Royal IHC it is...
master thesis 2015
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IJsebaert, T. (author)
During the execution of reclamation projects by Boskalis, often a temporary work channel and basin are required. This work channel is used by the dredging equipment to reach the project site as close as possible. The project site is often located in very shallow water which makes a channel necessary. The basin is used to transport the dredged...
master thesis 2010
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Kerssemakers, K.A. (author)
Turbidity is recognised as one of the major environmental problems of dredging. To get a handle on this problem the Dutch dredging industry (VBKO) commissioned a research project to develop software capable of predicting how much sediment is released into suspension during dredging operations. Major field measurement exercises are carried out in...
master thesis 2004
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Bruinsma, J. (author)
De sleephopperzuiger "Volvox Terranova" is eigendom van Van Oord ACZ en heeft een laadcapaciteit van 20.000 m3. Na het walpersen van de lading blijft een restlading over van ca. ---m3. Het doel van dit onderzoek is een voorstel tot aanpassing van de "Volvox Terranova" te presenteren om de restlading te minimaliseren, zonder de leegzuigproductie...
master thesis 2001
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Lubking, P. (author)
Voor het optimaal beladen van een sleephopperzuiger is het van belang inzicht te hebben in de processen die plaatsvinden tijdens de belading. Een van de deelprocessen is de entrainment van lucht in de beun bij het inbrengen van het zandwatermengsel. Bij het storten is er namelijk vaak sprake van een plunging jet, een vallende waterstraal. Een...
master thesis 2000
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Boot, M. (author)
In opdracht van Directie Noordzee is onderzoek gedaan naar de verspreiding van het overvloeiverlies bij sleephopperzuigers. Dit onderzoek is gericht op de vraag: wanneer treedt er menging van het overvloeiverlies met de waterkolom op en wanneer gedraagt het overvloeiverlies zich a1s een dichtheidsstroom. In geval van een dichtheidsstroom komt...
master thesis 2000
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Van Eeten, S.A. (author)
In de baggerpraktijk gaat het vooral om de hoeveelheid zand die geladen kan worden en de tijd die daarvoor nodig is. Om de kosten van het project te kunnen bepalen, is een nauwkeurige schatting van het benodigde aantal beunladingen gewenst. Het bepalen of berekenen van porienvolumes in een beun levert de nodige problemen op. Daarom wordt vaak...
master thesis 1999
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De Klerk, A. (author), Meulepas, J.M. (author)
Invloed van turbulentie en korrelverdeling op het bezinkproces. Voor het optimaal beladen van sleephopperzuigers is het belangrijk om inzicht te hebben in de processen die plaats hebben in het beun van een sleephopperzuiger. Een van de deel-processen is het bezinken van zand in een hoog geconcentreerd zandwater mengsel onder invloed van...
master thesis 1998
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Van der Salm, R. (author)
Tijdens de zandwinning op zee wordt er gebruik gemaakt van sleephopperzuigers. De sleephopperzuiger laat het overtollige proceswater overboord stromen. Het mengsel dat overboord stroomt wordt overvloeiverlies genoemd. Dit rapport geeft een beschrijving van de bevindingen van een literatuurstudie naar de verspreiding van het overvloeiverlies dat...
master thesis 1998
Searched for: subject:"hopper"
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