Tutorial 2: LCA & Functional Units Flashcards
What are the types of allocation-based methods?
Mass-based, energy-based, and value-based
What are the characteristics of an attributional LCA?
- Aims at describing the environmental properties of a life cycle and its
subsystems. - Include full life cycle
- Use average data
- Use allocations
What are the characteristics of a consequential LCA?
- Describes effects of changes in life cycle.
- Includes affected processes
- Uses specific data that reflect expected effects of changes
- Avoid allocation through system expansion
What is an appropriate functional unit for electric cars vs. gasoline cars?
per km driven, km/person
What is an appropriate functional unit for electric truck vs. diesel truck?
per km tonne of transporting 1 lb of goods
What is an appropriate functional unit for paper versus plastic cups and multiple use mugs?
per 1 L or 100 L of liquid
What is an appropriate functional unit for Lithium batteries, super capacitors, hydro dam for energy storage
Per unit of energy stored (could be kWh, kJ)
What is an appropriate functional unit for apples versus oranges?
Per calories, per gram of vitamins
What is an appropriate functional unit of vegetarians versus meat lovers?
per year of healthy living
What is an appropriate functional unit for UBC classrooms CHBE 101 versus CHBE 102
area per seat
