Biomedical Engineering Reference
In-Depth Information
Research purposes should include definite reasons for LCA study and application
of future results. To ensure that the research meets the stated objectives in breadth
and depth, the scope of the study must be amply defined, including the system
boundary, the time boundary, methods, data types, and assumptions.
The LCA process usually requires much data; the data in a time period cannot be
an effective evaluation for the entire life cycle, which needs to consider whether the
data is still representative in different periods. In addition, it is necessary to consider
the timeliness of the LCA data.
(2) Inventory analysis
Inventory analysis is an expression of the LCA basic data and is the basis of
life cycle impact assessment (LCIA). It is a quantitative analysis for products,
processes, or activities of resources, energy consumption, or emissions to the
environment in the entire life cycle stage. The core of inventory analysis is expressed
in units of product functionality system input and output. Inventory analysis is a
repeated process, generally including data collection preparation, data collection
and calculation procedures, allocation methods, and results.
This analysis conducts a detailed inventory for input and output for each unit of
the process and provides detailed data for the diagnostic process logistics, energy
flow, and waste stream. At the same time, the inventory analysis is also the basis of
the impact assessment phase.
(3) Impact assessment
Life cycle assessment is used in various decision-making processes, and it is
necessary to assess the exchange potential impact on the environment and describe
the relative importance of various environmental exchanges and the environmental
impact of each member in each stage of production or product size. This phase is
called the life cycle impact assessment. LCIA, as part of the evaluation of the entire
life cycle, can be used to identify opportunities to improve the product system and
help determine prioritization; to describe characteristics of the product system or
unit process or to establish a frame of reference; and to provide environmental data
or information support for decision makers through the establishment of series-type
parameters relatively.
References
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3. Li HP. Plant microscopy technique. Beijing: Science Press; 2009.
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Press; 1987.
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