- The IPH
In average, more than 1,275 wind turbines were installed annually since 1997 in Germany and more than 27,000 wind turbines are in operation today. The technical and economic life time of wind turbines is around 20 to 25 years. Consequently, dismantling of aging wind turbines will increase significantly in upcoming years due to repowering or decommissioning of wind farms and lead to millions of costs for operators. An option to supersede the costly and time-consuming dismantling of wind turbines entirely on-site is to establish a dismantling network in which partly dismantled wind turbines are transported to specialized dismantling sites for further handling. This network requires an optimization model to determine optimal locations and an appropriate distribution of disassembly steps to dismantling sites. The challenge is to consider the networks dependency on the trade-off between transportation and dismantling costs which, in turn, depends on the selection of dismantling depths and sites. Building on the Koopmans-Beckmann problem, we present a mathematical optimization model to address the described location planning and allocation problem. To permit a proof-of-concept, we apply our model to a case-study of an exemplary wind farm in Northern Germany. Our results show that the model can assist dismantling companies to arrange efficient dismantling networks for wind turbines and to benefit from emerging economic advantages.
dismantling, wind turbine, optimization model
The storage planning is an important component of the factory planning and describes an improvement potential in the times of an increasing global competition. The selection of a suitable storage, commissioning and transport system is a big challenge especially for small and medium-sized enterprises. In a research project of IPH – Institut für Integrierte Produktion Hannover a method for companies will be created to determine the necessary level of versatility and automation to choose an optimal system. This article introduces the research project and explains the approach and first results.
storage planning, sct systems, versatility, automation, software demonstrator
Wind turbines can withstand more load changes than bridges or helicopters - but at some point they, too, have had their day. Operators of wind turbines should therefore consider their options for continued operation, repowering or complete dismantling before the end of the approved operating period. Together with practical partners, the Institut für Integrierte Produktion Hannover (IPH) gGmbH is researching how dismantling can be carried out quickly, cost-effectively and in an environmentally friendly manner. The project "Development of an impact model for the efficient design of dismantling networks for XXL products" is funded by the German Research Foundation (DFG).
dismantling, wind turbine
Thousands of wind turbines need to be dismantled and replaced in the next years. The owners of the wind parks have to pay millions to handle this. How you can dismantle quickly, at a low price and ecologically friendly, is part of a research project of the Institut für Integrierte Produktion Hannover (IPH). The huge dismantling wave will start in the next years.
dismantling networks, wind turbines
Disassembling of large-scale products (e. g. wind energy plants, crane and conveyor systems which are known as XXL-Products) becomes increasingly important, as the operating time is limited. The challenge is to optimize the positioning of the complex and expensive disassembling on the operation site on the one hand and the costly transportation of modules to the disassembling factories. For this reason the location and allocation problem will be pictured in a mathematical model within the research project “DemoNet”. This model supports companies to create a XXL-disassembly-network. The research hypothesis assumes: a disassembly under ecological, economical and logistical aspects constitutes the optimum. The extension of a location planning tool forms the basis of the mathematical optimization model for the disassembly of XXL-Products. For solving the problem a genetic algorithms will be used. The result helps companies to arrange disassembling networks for XXL-Products efficiently.
dismantling planing, dismantling networks, impact model