Hull Number Effect in Ship Using Conveyor on Ocean Waste Collection

Abstract

The increase in ocean waste continues to grow from year to year, especially plastic and solid waste. Various ocean waste collection ships using conveyors exist, both in the form of designs and already in operation, but there has been no research on how many hulls are suitable for ocean waste collectors. This study aims to choose between the three-ship models, namely monohull type U, catamaran type inner flat hull, and trimaran type symmetrical. Assessment is based on ship resistance which relates to fuel consumption and flow distribution relates to ocean waste collection. This research uses Computational Fluid Dynamics (CFD) method which produces resistance, fluid flow velocity contours, and fluid flow patterns. Numerical simulation is based on Reynolds Averaged Navier Stokes (RANS). The turbulent model uses the standard k-epsilon equation. Then the volume of fluid sub-models used is open channel flow. The number of eulerian phases is two. Moreover, formulation of the volume fraction parameters used is an implicit body force. The results show that monohull type U is better than others in easiest to bring ocean waste closer to the conveyor and smallest resistance force. Then symmetric trimaran is faster than others in making ocean waste flow to the conveyor.

Hollow Wing Technique to Enhancing Conveyor Performance on Marine Debris Collection

“…The conveyor and wing are constructed at 1:8 scale. The ship model used is a catamaran type, because based on previous numerical research it shows that catamarans are better at collecting marine debris 26,29) . The catamaran ship model is made of wood, because, first, it keeps the ship afloat according to the draft designed, second, it is easier to build and cheaper than other materials.…”

“…Conveyors are the most often utilized instrument for gathering marine trash, according to assessments of marine waste cleaning technology conducted by other researchers 25) . Research on the effect of hulls number using a conveyor on ship resistance force was carried out by Sugianto et al 26) . Numerical research that was also conducted by Sugianto and Chen 27) showed that hollow wings have a lower resistance force than solid wings.…”

Investigating the Comparison of Ship Resistance Components Between U and v-Shaped Hulls

“…Wang and Lutsey [3], as well as Molland et al [4], have described several methods to increase the efficiency of energy use on ships. These methods include weather routing [5], [6], speed reduction [7], [6], propeller [8], [9], and hull optimization [10], [11], bow modification [12], [13], [14], hull cleaning management or preventing biofouling [15], [16], [17], [18], [19], [20], trimming strategy [21], adding devices [22], [23], [24], [25], [26], using more advanced antifouling [27], [28], [29], and analyzing the coating roughness [30], [31], [32], [33], [34], etc.…”

Effect of portable conveyor placement in ship on ocean waste collection behavior

“…Ocean waste cleaning boats are a special type of ship which the function of this ship is to collect ocean waste in rivers, lakes, seas, and canals [7]. Research on the effect of the number of hulls and conveyor 1095 (2022) 012015 IOP Publishing doi:10.1088/1755-1315/1095/1/012015 2 wing shape on ocean waste collection has been carried out [8] [9]. Ocean waste ships for shallow water generally use conveyors to collect the ocean waste [10].…”