Mechatronic Systems Engineering 3301A/B Lecture Notes - Lecture 38: Vaporization, Kilogram, Embodied Energy
19 Aug 2020
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Document Summary
Energy consumption at 3 phases (material production, product manufacture, and product use) in the material life-cycle and transport. If large changes are to be achieved, it is this phase that must be the target. When differences are great, precision is not the issue. Precise judgments can be drawn from imprecise data. Most of the energy consumed in the material life-cycle is derived from fossil fuels. Ontario is much better, but does not produce most of the products we use. The fossil-fuel energy consumed in making 1 kg of material is called its embodied energy. Some of the energy is stored in the created material (intrinsic energy) and can be reused at the end of life. Energies to recycle a material range from 10-100 mj/kg. Production of 1kg of material is also associated with undesired gas emissions. Co2 , nox , sox , ch4 global warming, acidification, and ozone-layer depletion. Many processes depend on melting, evaporation, or deformation.
