scholarly journals Coding the circularity. Design for the disassembly and reuse of building components

2021 ◽  
pp. 271-278
Author(s):  
Salvatore Viscuso
Keyword(s):  
End Of Life ◽  
Computational Modelling ◽  
Geometric Constraints ◽  
Physical Interaction ◽  
Architecture Design ◽  
Design Codes ◽  
Generative Design ◽  
Architectural Production ◽  
Building Components ◽  
Selective Disassembly

The architecture design today has new expressive features due to the parametric and computational modelling software, which greatly amplify the potential of language. This condition makes it possible to generate customised elements and systems through a process of cyber-physical interaction between design and architectural production. As well as the geometric constraints, dictated by manufacturing and assembly processes of materials, they can be incorporated in the generative design codes. The article examines the possibility to also include the main conditions that enable the selective disassembly of the elements and their reuse at the end of life, avoiding the generation of parts that are not remanufacturable or reusable.

Approach of Composing Disassembly Model Based on the CAD Information for End of Life Product

2014 ◽  
Vol 1039 ◽  
pp. 484-489
Author(s):  
Zhao Ren Wu ◽  
Zi Qiang Zhou ◽  
Guo Hong Dai
Keyword(s):  
End Of Life ◽  
Adjacency Matrix ◽  
Graph Model ◽  
Matrix Form ◽  
Automatic Method ◽  
Recycling Process ◽  
Influence Matrix ◽  
Model Based ◽  
Disassembly Sequence ◽  
Selective Disassembly

For the purpose of recycling end of life product, Selective disassembly methods are most common used for dismantling the old product. Only some parts which valuable for remanufacturing or reuse are dismantled. In addition, the optimal disassembly sequence which created automatic by the computer will help to decrease the disassembly cost and increase the whole revenue of recycling process. However, the disassembly model are still cannot be composed by the computer automatic, that is, some of the work need be done manually. Especially, the priority information among the parts should be analyzed by the engineer. In this paper, an automatic method is presented by comparing the feature of the parts. And then, by extracting and analyzing mates in the assembly, the adjacent information is obtained. Adjacency information and priority information respectively expressed by adjacency matrix and influence matrix, which can be used to depict the hybrid graph model in matrix-form, achieving the automatically creation of disassembly hybrid graph model.

Optimal Modular Remanufactured Product Configuration and Harvesting Planning for End-of-Life Products

2021 ◽  
Author(s):  
Jinju Kim ◽  
Seyoung Park ◽  
Harrison M. Kim
Keyword(s):  
Production Process ◽  
End Of Life ◽  
New Products ◽  
Product Configuration ◽  
Target Component ◽  
Configuration Design ◽  
Customer Demand ◽  
Proposed Model ◽  
Disassembly Sequence ◽  
Selective Disassembly

Abstract Since remanufacturing requires additional processes compared to the production process of new products, various factors need to be considered. First, it is necessary to decide which end-of-life (EoL) product parts/modules to use among the EoL products available for the remanufactured product. At this stage, it is crucial to understand the future customer demand and requirements for each part. Next, it is also necessary to figure out whether selective disassembly is possible to disassemble a specific target component without completely disassembling the product. With the increasing number of product designs that are difficult to disassemble, the disassembly sequence and level should be considered for the efficiency of the overall remanufacturing process. This study proposes an integrated model to (i) find configuration design suitable for remanufactured products that can maximize customer utility based on current EoL products, and (ii) establish a harvest plan that determines the optimal operations and levels. This proposed model can be used as a tool that helps product designers find the appropriate design of remanufactured products while increasing the efficiency of the remanufacturing process.

scholarly journals A selective disassembly methodology for end‐of‐life products

2005 ◽  
Vol 25 (2) ◽  
pp. 124-134 ◽  
Author(s):  
S. Kara ◽  
P. Pornprasitpol ◽  
H. Kaebernick
Keyword(s):  
End Of Life ◽  
Selective Disassembly

Research of Fuzzy Cost Model for Selective Disassembly Planning

2013 ◽  
Vol 834-836 ◽  
pp. 1732-1735
Author(s):  
Zi Qiang Zhou ◽  
Guo Hong Dai ◽  
Zhao Ren Wu
Keyword(s):  
End Of Life ◽  
Cost Model ◽  
Optimal Sequence ◽  
Selective Disassembly ◽  
Fuzzy Cost ◽  
Practical Feasibility ◽  
Operation Cost ◽  
Disassembly Planning

In order to protect environment, the end-of-life product should be disassembly and recycled. While selective disassembly method can be used to separate the valuable parts from the old product and used for reuse or remanufacturing. Usually there are several feasible disassembly sequences for operation; the optimal sequence is decided by operation cost. A fuzzy cost model is presented instead of the traditional quantitative cost model. The advantage of this method is that the detailed information of the end-of-life product is not needed and, the practical feasibility of selective disassembly is improved.

scholarly journals Circular Construction Process: Method for Developing a Selective, Low CO2eq Disassembly and Demolition Plan

2021 ◽  
Vol 13 (16) ◽  
pp. 8815
Author(s):  
Roberta Melella ◽  
Giacomo Di Ruocco ◽  
Alfonso Sorvillo
Keyword(s):  
Environmental Impact ◽  
End Of Life ◽  
Building Materials ◽  
Construction Sector ◽  
Low Carbon ◽  
Research And Innovation ◽  
Life Phase ◽  
Building Systems ◽  
Steel Building ◽  
Building Components

With the increasing focus on the construction sector (e.g., following the European Green Deal initiative) with the aim to reduce emissions by 55% by 2030 (compared to 1990 levels), as well as achieve full decarbonisation by 2050, the built environment remains a strategic domain for the R&I (Research and Innovation) agenda. Indeed, the building and construction sector is the main contributor to greenhouse gas emissions (39% of global emissions as of 2018), highlighting the need to start a process of decarbonisation of this sector. The overall reduction in the environmental impact of building materials is achieved by establishing sustainable continuity between the end-of-life phase of the building and the production phase of individual building components. In particular, with reference to the end-of-life phase of the building (BS EN 15978: 2011), the Minimum Environmental Criteria foresee the preparation of a plan for the disassembly and selective demolition of the building, which allows the reuse or recycling of materials, building components and prefabricated elements used. According to the guidelines of a low-carbon construction design, which takes into account a circular economy, the following thesis deals with a methodological proposal to study “dry” construction systems (wood and steel). In particular, the study intends to reach the development of such an elaboration by carrying out an assessment of the environmental impact of a process of selective disassembly and demolition of steel building systems. The model is developed on the basis of a reading of the level of sustainability of emblematic case studies, appropriately identified, i.e., ‘quality’ architectures, built with ‘dry’ (steel) building systems.

Waste Prevention in the Prefabricated Building Sector

2019 ◽  
Vol 887 ◽  
pp. 361-368
Author(s):  
Fritz Kleemann ◽  
Dominik Laner ◽  
David Laner
Keyword(s):  
End Of Life ◽  
Waste Prevention ◽  
Waste Generation ◽  
Single Family ◽  
Building Sector ◽  
Building Components ◽  
Use Phase ◽  
Wood Frame ◽  
Frame Construction ◽  
Whole Life Cycle

The present study investigates waste generation during the production and erection phase of a prefabricated single family house in Austria as a basis for identifying waste prevention potentials. Therefore, the material composition of a case study building (wood frame construction) is compared to waste generated during production and erection. In order to assess the whole life cycle of prefabricated buildings the use phase as well as the end-of-life phase are also considered. Examples are given to show how different measures can impact the generation of waste directly and indirectly. The results show that production and erection are already very efficient with regard to waste generation and prevention potentials mainly exist in further offcut reduction and optimization in packaging. The use phase and the end-of-life of the building are more complex to investigate and waste prevention potentials are less tangible. However, important measures for waste reduction are related to the easy exchangeability of building components as well as their reusability. The lifetime extension of the building and building components, which can be achieved through proper operation and maintenance, can be considered a key issue for preventing waste in the building sector.

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