recycling disposal Process life stages 1 Pre process Resource provisioning

Recycling disposal process life stages 1 pre process

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recycling, disposal Process life stages 1. Pre-process Resource provisioning Process implementation 2. Operation Primary process operation Complementary process operation 3. Process decommissioning
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L02 Slide 44 Scope: Functional Unit 1. What is the function of the product/process? (i.e. what does it do?) 2. Quantitative measurement of the function The quantitative basis to which your inputs and outputs are relative It should explicitly state units For your MIE315 project: Alternatives need to perform the same function and satisfy the same constraints Functional unit must be a common denominator
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L02 Slide 45 Product Function Functional Unit Wind turbine Light bulb Uber Hand dryer Scope: Functional Unit Examples
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L02 Slide 46 Scope: Functional Unit Examples “The functional unit is 1 g of organic ingredients (active content, AC). Rubbing/abrasive agents in hand cleaning agents are not included. Recognizes that shampoos and soaps are not equally effective. Some products are more dilute than others e.g. 8 mL of one product may do the job of 20 mL of another product Source: EU ECO-LABEL FOR SHAMPOO AND SOAPS
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L02 Slide 47 Scope: System Boundary Elementary Flows Water effluent Air emissions Solid waste Elementary Flows Materials Energy Other Systems Other Systems Pre-manufacturing Manufacturing Packaging & Transport Use End of Life System Boundary Product Flow Product Flow
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L02 Slide 48 System Boundary Decides which subset of the overall collection of processes and flows of the product system are part of the study Selection of system boundary shall be consistent with the goal of the study The criteria used in establishing the system boundary shall be explained Any decisions to omit life cycle stages, processes, inputs or outputs shall be clearly stated, and the reasons and implications shall be explained Source: ISO 14044:2006
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L02 Slide 49 Example: Margarine Container
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January 18 & 21, 2019 L02 Part 3: Functions, Objectives, and Constraints
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L02 Slide 51 Functions, Objectives, Constraints (FOCs) A ghost revisiting you from Engineering Strategies & Practices! An FOC analysis is usually done on its own Since an FOC describes the function of a design, it is tied to the Goal & Scope of an LCA 51
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L02 Slide 52 FOC Related to LCA FOC Functions What a design does Objectives Attributes a design should give How a design will be evaluated Constraints What a design must be LCA Goal & Scope Definition Study goal Functional unit System boundary Life cycle inventory Impact assessment Interpretation The FOC analysis is driven by the client’s needs and wants
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L02 Slide 53 Function What the design does (not how well it does it) Usually broad and not quantifiable itself Usually consists of an action verb and a noun Often one primary function and small secondary functions and unintended functions What the design should do?
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L02 Slide 54 Function
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L02 Slide 55 Objectives
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  • Fall '09
  • MURRAYTHOMSON

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