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Several papers and presentations were published during my PhD research project and also afterwards several presentations were given. In the following table these papers and presentations are listed. Most of them can be downloaded from this website, some of them are already published in scientific Journals and are copyright protected.

 

Year

Title

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2016

Simulation of Dry Bulk Terminals, presentation at the DBTG Technical & Operational Meeting, Rotterdam 21st of April 2016.

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2015

Simulation-based tuning of the terminal's employment to the varying workload

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2015

Simulation-integrated design of terminals

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2015

Simulation-integrated Design of Dry Bulk Terminals      

PhD Thesis

2015

Belt conveyor network design using simulation                              

Journal of Simulation, advance online publication [doi: 10.1057/jos.2014.38]

2015

Simulation based rescheduling of the stacker-reclaimers operation

Journal of Computational Science, 10C, pp. 119-128

2014

Simulation based determination of the required stockyard size for dry bulk terminals                                  

Simulation Modelling Practice and Theory, 42, pp. 119-128

2013

Operational control for stacker-reclaimers        

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2013

Stockyard layout (re)design

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2013

Simulation-based operational control of a dry bulk terminal

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2012

Measuring and improving dry bulk terminal performance

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2012

Modeling the arrival process at dry bulk terminals

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2011

Dry bulk terminal characteristics

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Projects

Consultancy

For a dry bulk terminal operator I did a research to forecast the annual throughput of bulk materials by focusing on the German demand for steam coal. The combination of the ambitious German greenhouse reduction goals, the nuclear phase out and the projected wind and solar power generation complicates the calculation of the future demand for steam coal. An electricity market model, based on the current electricity market and power generation structure in Europe, was used to forecast merit-order effects. These effects determine the electricity production required for steam coal.

For a terminal operator I am involved in a project to develop a new terminal planning system. Formulating a feasible schedule for unloading ships, loading trains and barges simultaneously is a difficult task for planners. Especially when personnel and other terminal equipment like stacker-reclaimers and dozers also need to be planned. Take into account the variations that occur during daily operation (e.g., ships arrive later than expected or equipment breaks down) and making the planning is a hard puzzle. The objective is to develop a tool to support the planners in making robust and cost-effective schedules.

Simulation expert

Several simulation models were developed for dry bulk as well as liquid bulk terminal operators. One example is the assessment of several belt conveyor network designs. The terminal performance was measured during simulation and together with the investment costs per design a Net Present Value analysis could be applied. Results from the simulation study underpinned the investment proposals but assured also that the best solution was selected.

Another example is a simulation model developed to determine the impact on the arrivals of crude oil tankers when one of the unloading jetties will be out of production for a longer time. Several scenarios were formulated with different renovation periods. The impact on the waiting times of tankers, which will result in demurrage penalties, and the lagging delivery of crude oil was investigated. The outcome of the simulation experiments has shown that a shorter but more expensive scenario is preferable to scenarios which take longer time and require fewer investments.

Simulation projects

Project management

I worked for several years as a project manager at a system integrator for automatic welding equipment in the Netherlands. I was responsible to realize fully-automated, custom-build production lines for the European manufacturing industry. Some examples were production lines for upright frames to be used in pallet racking systems, for car components for the tier-suppliers in the German automotive industry, or production lines to manufacture design radiators or temporary fences. All activities from engineering until commissioning were organized and managed to realize machines within planning and budget and with a satisfied customer.

PhD Thesis

To meet the expected increase of the seaborne trade flows for coal and iron ore new dry bulk terminals have to be built or existing terminals need to be expanded. However, due to the absence of a comprehensive design method for dry bulk terminals, designs are nowadays forced to be based on average values, rules-of-thumb and practical experiences. Unfortunately, the values suggested in literature for rules-of-thumb match poorly with characteristics of actual terminals. Furthermore, the impact of stochastic variations on terminal designs is hardly considered nowadays.

Modeling and designing dry bulk terminals as a whole is complicated due to the dependencies between the terminal subsystems. That’s why I decomposed the terminal in subsystems (seaside, landside, stockyard and belt conveyor network), I analyzed these subsystems separately and at the end, I merged these subsystems. For each subsystem a discrete-event simulation models was developed to include the stochastic processes and specific operational procedures. These models were used to assess the parameters that affect the terminal design. The total terminal model covers all subsystems. This model was validated using real-world operational terminal data and used for the formulation and evaluation of terminal designs.

I have some copies left from my PhD thesis, so if you are interested please contact me.

PhD thesis

About

Exspecta was founded in May 2014 by Teus van Vianen after finishing his PhD project. Teus received his MSc degree in mechanical engineering from Delft University of Technology in 2005. After his study, he worked for five years in the machinery industry, two years as a project engineer and three years as a project manager. In June 2010, he returned to the academic world and started his PhD project “Simulation-integrated design of dry bulk terminals”. During his research, the parameters that affect a dry bulk terminal (re)design were discovered and simulation tools were developed to support the design process. Teus defended his PhD thesis successfully at January, 13th 2015 in Delft.  He started Exspecta as a consultancy firm to bring the theoretical knowledge and simulation models developed into the logistics industry, specifically for terminal operators and terminal designers. 

Adress:

Pr. Margrietstraat 43
2983 ED Ridderkerk, The Netherlands

Tel: +31 6 12084756 / +31 180 443104

Chamber of Commerce: Rotterdam, 60674245
Email: t.vanvianen@exspecta.nl
Website: www.exspecta.nl

Picture Teus van Vianen
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