Life cycle assessment of self-healing products
Life cycle assessment of self-healing products
复制标题
DOI：
10.1016/j.cirpj.2022.02.013
复制
发表时间：
2022-03-12
影响因子：
4.8
通讯作者：
Perry, Justin
中科院分区：
文献类型：
--
作者：
Cseke, Akos;Haines-Gadd, Merryn;Perry, Justin
自我修复产品可以感知和修复损坏，有助于提高产品的循环性和安全性。这些产品处于研究和开发的早期阶段。生命周期评估（LCA）中现有的产品寿命延长模型并不是针对自修复产品开发的。因此，为自我修复产品制定生命周期评估框架是及时和紧迫的，以便在设计阶段早期优化其环境影响。本文提出了一个新的框架LCA的基础上，恢复产品的功能，从而链接到产品寿命延长和用户接受的自我修复。该框架中使用的模型使用每个寿命结束时的自我修复，故障和用户接受的概率来量化产品的使用寿命延长以及由此避免或延迟的新生产。该模型考虑了具有不同愈合效率的多个愈合周期。以某无人机的自修复螺旋桨叶片为例，对该框架进行了应用验证。本文展示了自我修复在减少生命周期影响方面的积极贡献。敏感性分析揭示了一个临界点，即避免排放的好处超过了自我修复技术的内在影响。这清楚地表明了生命周期评估框架的重要性，以了解在何种条件下使用自修复产品的环境收益最大化。(c) 2022
Self-healing products sense and repair damage and should help to improve product circularity and safety. Such products are at an early stage in research and development. Existing models for product life extension in life cycle assessment (LCA) were not developed for self-healing products. It is timely and urgent therefore to develop a framework for life cycle assessment for self-healing products so that their environmental impact can be optimised early at the design stage. This paper presents a new framework for LCA, based on a restoration of a product's function, and thus linking self-healing to product life extension and user acceptance. The model used within this framework uses the probabilities of self-healing, failure and user acceptance at the end of each life to quantify a product's service life extension and consequential avoided or delayed new production. The model takes into consideration multiple healing cycles with varying healing efficiencies. A case study scenario of self-healing propeller blades of an unmanned air vehicle employed for site inspection was used to test the application of the framework. The paper shows the positive contribution of self-healing in reducing life cycle impact. Sensitivity analysis revealed a tipping point where the benefits of avoided emissions outweigh the embedded impacts of self-healing technology. This clearly shows the importance of the life cycle assessment framework to understand under which conditions the environmental gains of using self-healing products are maximised.(c) 2022