Optimising Drive Train Design for Tshds Using Dynamic Simulation Models
Type:
Presented during:
WODCON XX: "The Art of Dredging" - 2013, Brussels, Belgium
Authors:
Den Boer L, Kuypers R, van der Blom E
Abstract: Compared to other ships Trailing Suction Hopper Dredgers have extensive drive train systems. Components as diesel engines, propeller, dredge pumps, jet pumps, generators, etc. are coupled together and interact with each other. This interaction has large influence on the performance of the TSHD.
In the research project Smart Dredger IHC Merwede has developed dynamic simulation models, called Smart Dredger models, to gain profound insight in the interaction between drive train components. IHC Merwede applies these models in the design phase of the TSHD in order to improve her operational performance. Dynamic simulation models of each drive train component have been developed. The interaction between components, each with their own limitations, is of large influence on the performance of drive train systems and the overall performance of the TSHD. With the Smart Dredger models the performance can be optimized by comparing different drive train configurations. These comparisons will lead to the optimal trade off in TSHD designs.
In this paper two case studies are discussed. The first case study shows optimized propulsion design for a TSHD after comparing variable and constant speed propulsion. Simulations and field measurements were carried out showing potential fuel savings on propulsion from 10 up to 39%. Subsequently the application of different variable speed propulsion systems are briefly reviewed. The second case study goes into the simulation model for starting a dredge pump using a diesel engine. Dynamic simulation of the pump load and the dynamic characteristics of the diesel engine have led to better insight leading to more optimized designs of these systems. The paper concludes with an outlook on further development of dynamic simulation models. IHC Merwede will continue the work in the research project New Drives in order to deliver the most optimal system for every customer.
Keywords: Keywords: simulation model, dredge pump start-up, FPP/CPP propulsion, fuel saving