Lecture 20 - What you should have learned: Introduction to...

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LCA Case Study: The Refrigerator CEE 260: Environmental and Sustainable Engineering Principles What you should have learned: Introduction to Life Cycle Assessment How does a refrigerator work? What are the environmental emissions associated with the life cycle of a refrigerator? How was the life cycle assessment of the refrigerator performed? (e.g., what was the functional unit?) What are the environmental impacts of a refrigerator? What is an environmental product declaration? How do you know if it’s a good idea to re-use a refrigerator, or any other product, at end of (first) life? How Does a Refrigerator Work? The compressor compresses the refrigerant gas. This raises the refrigerant's pressure and temperature (orange), so the heat-exchanging coils outside the refrigerator allow the refrigerant to dissipate the heat of pressurization. As it cools, the refrigerant condenses into liquid form (purple) and flows through the expansion valve. When it flows through the expansion valve, the liquid refrigerant is allowed to move from a high-pressure zone to a low-pressure zone, so it expands and evaporates (light blue). In evaporating, it absorbs heat, making it cold. The coils inside the refrigerator allow the refrigerant to absorb heat, making the inside of the refrigerator cold. The cycle then repeats. Gram Refrigerator LCA
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This note was uploaded on 04/17/2008 for the course CEE 260 taught by Professor Kimf.hayes during the Fall '06 term at University of Michigan.

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Lecture 20 - What you should have learned: Introduction to...

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