Assignment 2 – LCA Exercises Problems 1. Choose one product and construct

Assignment 2 – LCA Exercises
Problems
1. Choose individual effect and fabricate a materials and breath career diagram, with minimal particular in the pre-manufacturing and manufacturing ranges and enhanced particular in the effect exhibition and conservation range. Suggest expend actions by the pur-pose engineer.
2. Assimilate the conservation of untouched monograph and recycled monograph. Assimilate from an environmental summit of inspection the conservation of recycled monograph and the conservation of monograph obtained from monograph wood. The recycled monograph has been obtained from monograph wastes delighted in 16-t traffics from a absence of 1000 km. The aggregate emissions of carbon dioxide, CO2, and the generated solids in kg of them are conservationd as similitude parameters. It is delightful to assimilate the partial goods of the subjoined two scenarios:
• purchasing a 400-g mob of newlightlight adaptation monograph at the hole stationery accumulation • driving to bribe a harmonious mob of recycled monograph at an literature 1 km detached.
Only the ELs imputable to fresh materials and conveyance are considered. Conservation the subjoined environmental loads:
EL/kg of recycled EL/kg of wood
EL monograph monograph EL/km (car) EL/tkm f 16-t traffic)
kgCO2 1.03 1.61 2.16 x 10-1
kg solids 7.06 x 10-2 1.73 x 10-1 7.50 x 10-6 3.46 x 10-1 7.19 x 10-2
tkm is equipollent to a magnitude of 1 t (1000 kg) delighted 1 km.
3. Assimilate the conservation of monograph towels and an energy duller to arefaction the hands. Assimilate environmentally the conservation of monograph towels coercion arefaction hands and the conservation of a hand-dryer replete with electricity from a fog fervid capability settle or from an eolic capability settle. The considered similitude parameters are the emissions of carbon dioxide, CO2, and sulfur dioxide, SO2.
Suppose that the moment of a monograph towel is 7 g and that the electric hand-dryer is 2000 W and works coercion 30 s. With these basis, designate the best form, from an environmental summit of inspection, to dull the hands. The ELs connected to the monograph and the conservation of electricity are conjectured to be the subjoined:
Electricity consumption: Ec (kWh); Ec = (2000 (J/s)/1000)(30/3600) = 1.67 X 10-2 kWh.

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