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» LCA中的功能单元

LCA中的功能单元

1997
  • International Organization for Standardization (ISO)
Environmental engineering office displaying the functional unit in Life Cycle Assessment.

(图片仅供参考)

功能单元是 生命周期评估 该标准定义了产品系统的量化性能,可用作参考单位。它确保不同系统之间的比较是在公平和等效的基础上进行的。例如,在比较涂料时,功能单位可以是 "保护 1 平方米墙面 10 年"。

The functional unit is the cornerstone of any comparative Life-Cycle Assessment. Its primary purpose is to provide a reference to which all input and output data are normalized. Without a clearly defined and identical functional unit, comparing two products or services would be meaningless. For instance, comparing a disposable cup to a reusable cup requires a functional unit like ‘providing a vessel for 1,000 hot drinks’. This accounts for the fact that one reusable cup replaces many disposable ones. The definition must be precise and include aspects of performance, quantity, and duration. It answers the questions: ‘What function does the product provide?’, ‘How much of that function?’, ‘For how long?’, and ‘To what quality standard?’. A poorly defined functional unit can introduce significant bias into an LCA study, leading to misleading conclusions. It is established during the ‘Goal and Scope Definition’ phase and directly influences the system boundaries and the data collected in the Life Cycle Inventory (LCI) phase.

UNESCO Nomenclature: 3307
- 环境工程

类型

抽象系统

中断

基础

用法

广泛使用

前体

  • 科学和工程中的标准化测量单位概念
  • 注重功能的价值工程原则
  • 成本效益分析框架

应用程序

  • 比较产品断言
  • 生态标签计划
  • 对产品的环境性能进行基准测试
  • 产品设计中的材料选择
  • 可持续消费政策制定

专利:

NA

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Related to: functional unit, LCA, ISO 14040, comparative analysis, product system, reference flow, environmental performance, normalization.

历史背景

LCA中的功能单元

1992
1993
1994
1997
1998
1999-05-01
2000
1992
1992
1993-07-22
1996
1998
1999
2000
2000

(如果日期未知或不相关,例如“流体力学”,则提供其显著出现的近似估计)

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