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

Assignment 2 – LCA Exercises
Problems
1. Choose undivided work and fabricate a materials and intelligence stream diagram, with minimal element in the pre-manufacturing and manufacturing stations and enhanced element in the work delivery and representation station. Suggest withhold actions by the guile engineer.
2. Parallel the representation of fresh article and recycled article. Parallel from an environmental apex of light the representation of recycled article and the representation of article obtained from article pulp. The recycled article has been obtained from article wastes delighted in 16-t exchanges from a space of 1000 km. The sum emissions of carbon dioxide, CO2, and the generated solids in kg of them are representationd as resemblingity parameters. It is valuable to parallel the superficial proceeds of the aftercited span scenarios:
• purchasing a 400-g throng of newlightlight adaptation article at the hole stationery abundance • driving to purchase a resembling throng of recycled article at an body 1 km separate.
Only the ELs ascribable to bald materials and manner are considered. Representation the aftercited environmental loads:
EL/kg of recycled EL/kg of pulp
EL article article EL/km (car) EL/tkm f 16-t exchange)
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 concretion of 1 t (1000 kg) delighted 1 km.
3. Parallel the representation of article towels and an enthusiasm tameer to arefaction the hands. Parallel environmentally the representation of article towels ce arefaction hands and the representation of a hand-dryer provided with electricity from a mist thermal potentiality settle or from an eolic potentiality settle. The considered resemblingity parameters are the emissions of carbon dioxide, CO2, and sulfur dioxide, SO2.
Suppose that the gravity of a article towel is 7 g and that the electric hand-dryer is 2000 W and works ce 30 s. With these postulates, individualize the best method, from an environmental apex of light, to tame the hands. The ELs connected to the article and the representation of electricity are conjectured to be the aftercited:
Electricity consumption: Ec (kWh); Ec = (2000 (J/s)/1000)(30/3600) = 1.67 X 10-2 kWh.

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