Reuse-efficiency model for evaluating circularity of end-of-life products
Reuse-efficiency model for evaluating circularity of end-of-life products
复制标题
DOI：
10.1016/j.cie.2022.108232
复制
发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
S. Okumura
中科院分区：
文献类型：
--
作者：
S. Okumura
废弃产品的再利用是减少环境废弃物的有效途径。当提高循环产品的耐久性和报废产品的回收率以加强可再利用产品的循环时，定量评估将被再利用的产品数量至关重要。同样，有必要在产品设计阶段评估多个复用周期如何影响可复用产品的可循环性。本研究发展一个再利用效率模型，以定量评估报废产品的再利用程度。圆形产品的特点是“相对恶化”和“绝对恶化”，每种类型的恶化的时间遵循一个独立的概率分布。再利用效率模型的基础上开发的三个再利用效率因子的相对和绝对恶化的调和平均值。研究了产品的耐久性、报废产品的回收率和再利用率以及最大再利用周期数对再利用效率的影响。此外，产品的最佳耐用性，最佳的回收率的寿命结束的产品，和最大数量的再利用周期是通过最大化每单位成本的再利用效率，它考虑了耐用性延长和收集的寿命结束的产品的成本。从这项研究中获得的见解鼓励产品的再分配和再利用，并有望建立一个更好的循环经济。
Reusing end-of-life products is an effective approach to reduce environmental waste. It is crucial to evaluate the number of products that will be reused quantitatively when the durability of circular products and the collection rate of end-of-life products are improved to enhance the circulation of reusable products. Likewise, it is necessary to evaluate how multiple reuse cycles affect the circularity of reusable products in the product design stage. This study develops a reuse-efficiency model to evaluate the extent of reuse of end-of-life products quantitatively. Circular products are characterised by ‘relative deterioration’ and ‘absolute deterioration’, and the time to each type of deterioration follows an independent probability distribution. The reuse-efficiency model is developed based on the harmonic mean of three reuse-efficiency factors generated by the relative and absolute deteriorations. The effects of the product’s durability, collection rate and recycling rate of end-of-life products, and maximum number of reuse cycles on the reuse efficiency are investigated. Furthermore, the optimal durability of a product, optimal collection rate of end-of-life products, and maximum number of reuse cycles are obtained by maximising the reuse efficiency per unit cost, which considers the costs of durability extension and collection of end-of-life products. The insights obtained from this study encourage the redistribution and reuse of products and are expected to establish an improved circular economy.