Analysis on product recycling profit based on disassembly-logic-net (DLN) model

Designing products aiming at minimizing their impact on the environment is becoming increasingly important. From the product recycling and life cycle engineering design(LCED) viewpoint, we should evaluate not only the economic cost but also environmental impact during disassembly process. This paper presents concepts of the disassembly activity logic network(D-L-N) modeling for product recycling assessment. According to the connection relationships and hierarchical structure among the product, D-L-N can be abstracted for disassembly, recycling analysis, etc.. D-L-N is employed for the calculation of recycling profit and the determination of product optimal recycling strategy in this paper. Recycling method based on product hierarchical structure, concept of recycling profits and the searching algorithm of recycling scheme are also discussed. A case study of a complex product recycling demonstrates that D-L-N can facilitate economic and environmental impact analysis of a product life cycle, is also the basis of product design and disassembly path planning.