Zoekresultaten

Onderzoeksrapportage Circulaire Gebouwinstallaties 2016 - 2017

Met onderzoekspartners Ruben Vrijhoef (HU), Erlijn Eweg (HU), Raymond Stijkel (BAM), Arnold Homan (Inbo), Bas Slager (Repurpose). Uit de Inleiding: "In september 2015 heeft Hogeschool Utrecht een project aanvraag ingediend bij NRPO SIA, genaamd Circulaire gebouw installaties, samen met de partners BAM, Inbo en Repurpose. De insteek van het onderzoek was dat de gebouwinstallaties van het onderwijsgebouw aan de Padualaan 99 en 101 onderzocht werden op de mogelijkheid voor circulair hergebruik, met de partner bij de grootschalige renovatie van deze twee HU gebouwen. Op 23 februari ontvingen we de toekenning van NRPO SIA. Het oorspronkelijke project was gepland om eind oktober, begin november 2015 te starten. Door de toekenning later dan wij verwacht hadden, moesten we echter opnieuw met de projectpartners in overleg. In het project was uitgegaan van een bepaald onderzoeksobject, een gebouw. Het in het projectvoorstel omschreven onderzoeksobject was inmiddels al gestript en gesloopt (januari 2016). Daardoor is er in onderling overleg, besloten tot de volgende inhoudelijke projectwijzigingen: 1) De keuze voor een ander onderzoeksobject. 2) Het uitgangspunt wordt omgebogen naar de toepassing van multifunctionele bouwdelen, waarin de installaties al verwerkt zijn. De in het oorspronkelijke projectplan genoemde resultaten blijven in hoofdlijnen ongewijzigd, maar de resultaten op detailniveau worden iets anders ingevuld en uitgewerkt. De aanloop van dit project laat direct één van de kritische succes factoren zien bij een circulaire economie in de praktijk. En dat is de afstemming van vraag en aanbod van bouwmaterialen en producten binnen de keten. Als we materialen uit sloop en renovatiepanden elders willen hergebruiken en de timing van sloop of bouw wordt vertraagd, hapert het proces. Bij dit KIEM-VANG project ging het precies andersom: de sloop/renovatie van het beoogde onderzoekspand was al gebeurd op het moment dat de aanvraag werd goedgekeurd."

The road to circularity a framework for and experiences in collecting road data in a circular renovation process

The construction and transport sectors both have a substantial impact on the environment. The construction, maintaining and renovating of roads involves both these sectors and the environmental impact of this work can be reduced. The basic principle of a circular economy is to close material loops and so retain the highest utility, quality and value of products, components and materials as possible. An important question in this respect is how to qualify and quantify material flows. Material and project passports seem to be part of the solution to improve insights and sharing information on quantities and qualities of materials used in construction projects. This paper has used a literature study on material passports and has taken into account current project management software used by a municipality, in order to share a framework for organising and collecting road construction data. Furthermore, various scanning equipment and procedures were employed onsite in an experiment in collecting actual road data. This resulted in a large amount of different data files that have been interpreted and incorporated into the existing database structure of the municipality. The insights gained may help other researchers, principals and contractors in the road construction industry in collecting and storing reliable data necessary to renovate roads circularly.

Aligning actors in a road renovation project by a co-design process the road to circularity

Disassembly 4.0: A Pragmatic Approach to Achieve Sustainability in Engineering

This chapter explains in brief what is needed to achieve more sustainable manufacturing processes. It develops both aspects of sustainable, economic, and technical feasibility with most focus on the latter. Remanufacturing processes are described together with relevant factors that enhance their effectivity and efficiency. An overview is given of what kind of shopfloor innovations are required in the near future and some suggestions on how digital and other Industry 4.0 technologies could help to move toward circular manufacturing.

The Assembly and Disassembly Process Guided by Software Agents

Author supplied: A manufacturing process can be described by a sequence or combination of production steps. Based on this approach a manufacturing system has been developed that is capable to produce several different products in parallel. A batch size of one unit is possible and the production is pull-driven. The manufacturing system is based on agent technology and a special so-called product agent collects information about the assembly process. This agent will be connected to the actual product and can guide the disassembly process at the end of the products life. The agent will show the inverse steps to be taken to take a product apart. This approach can be used in the agent based manufacturing process described in this paper but the concept can also be used for other manufacturing systems. The paper discusses the possibilities as well as the restrictions of the method proposed here.

Disassembly Strategies for Remanufacturing

This paper describes some explorations on the concept of disassemblability as an important circularity indicator for products because of its severe impact on reuse value. Although usefulness of the concept for determining disassembly strategies and for improving circular product design clearly shows in earlier studies, the link with Industry 4.0 (I4.0)-related process innovation is still underexposed. For further technical development of the field of remanufacturing, research is needed on tools & training for operators, diagnostics, disassembly/repair instructions and forms of operator support. This includes the use of IoT and cobots in remanufacturing lines for automatic disassembly, sorting and recognition methods; providing guidance for operators and reduction of change-over times. A prototype for a disassembly work cell for a mobile phone has been developed together with researchers and students. This includes the removal of screws by means of a cobot using both vision & the available info in the product’s Bill-Of-Materials, the removal of covers, opening of snap fits and replacement of modules. This prototyping demonstrates that it is relatively easy to automate disassembly operations for an undamaged product, that has been designed with repairability in mind and for which product data and models are available. Process innovations like robotisation influence the disassemblability in a positive way, but current indicators like a Disassembly Index (DI) can’t reflect this properly. This study therefore concludes with suggestions for an evaluation of disassemblability by looking at the interaction between product, process and resources in a coherent way.