Exercise 3 (2 points) Notation: Questions 1) to 4) are rated 0.5 point each. Indicate at least the formula used and the numerical result. Question 1: Estimate the additional annual electrical energy demand if 50% of cars (excluding trunks) become electric vehicles in France assuming that The number of small cars in France = 30 millions The number of km per year per car = 10 000 km per year The average consumption is 15 kWh per 100 km . 22,5 TWh Question 2: Estimate the land footprint (LF) of producing bioethanol from maize in order to replace the energy equivalent of 10% of the annual world oil production considering An oil production of 100 Mb/day 1 barrel of oil equivalent = 0.14 toe, and 1 toe = 42 GJ A land footprint of bioethanol from maize at 344 m per GJ . . 7.10^12 m2 = 7.10^6 km2 Question 3: Estimate the employment effect of replacing during one year 1 M worth of nuclear based electricity by 1 M worth of gas based electricity assuming the following job content in Full Time Employement during a year by M spent in the respective sectors: For gas power : 1 FTE.yr/M For nuclear power : 6 FTE.yr/M Loss of 5 FTE.yr/M . Question 4: In a power system, the supply is ensured by a monopoly with the following portfolio during a given period of study: 3 thermal power plants: Unit A ; cost=10/ MWh and Pmax=1MW Unit B ; cost=20/ MWh and Pmax=1MW Unit C; cost=30/MWh and Pmax=1MW A Hydroelectric dam with two MWh of energy stored, without additional inflows. O O o During the next three hours the demand shall be 2 MWh the first hour, 3 MWh the second hour and 1 MWh the third hour. What is the total benefit from using the two MWh of stored water during this period of three hours in comparison to a situation where the water is not used? 50