Lecture 9

Question 1

canada’s renewable energy growth

Answer 1

electricity generation increased by 18%
in 2019, 82% of electricity came from non GHG emitting sources

Question 2

PEI’s renewable power

Answer 2

PEI generates most of its electricity from wind, some from NB
in 2018, 0MT CO2 eq was produced

Question 3

types of hydropower water wheels

Answer 3

overshoot = built where significant drop
undershoot = built where no drop
breadshot = built where moderate drop
no resevoir = small scale generation

very efficient (90%)

Question 4

improving wind power

Answer 4

wind speed
power coefficient
sweep area

Question 5

improving wind energy

Answer 5

higher average wind speed
larger sweep area
more aerodynamic design

Question 6

photovoltaic effect (PV)

Answer 6

the direct conversion of photons (sunlight) into electricity by means of a semiconducting material

PV solar cells use this to convert sunlight into energy

Question 7

solar energy

Answer 7

a PV system is an array of cells arranged and connected

amount of electricity generated depends on the intensity of sunlight reaching panel face

Question 8

geothermal power

Answer 8

use steam from underground in a turbine to run a generator which produces energy
steam cools in cooling tower and condenses back to water, which is pumped and process begins again

Question 9

geothermal heat pump

Answer 9

can be used to provide heating, cooling, and hot water
taps into heat from undergorund
reversed in winter

Question 10

biomass

Answer 10

…
combustion to produce heat

Question 11

challenges of renewable energy sources

Answer 11

hydropower: initial high cost and long build time of hydroelectric damns
requires large areas of land
possible disruption of natural river flow
alteration of animal habitats

solar and wind: high variability requiring systematic adjustments

all: excessive cost