Renewable Energy (Lec 10)

Question 1

Percentages of Renewable Energy we use the most

Answer 1

Hydropower 57
Biomass 23
Solar 9
Wind 7
Geothermal 4

Question 2

Google currently is using renewable energy to power what percent of operations?

Answer 2

35

Question 3

Energy contained in fireweed and other plant matter

Answer 3

Bio energy

Question 4

What are biomass fuels derived from

Answer 4

Solar energy

Question 5

Traditional fuels

Answer 5

Wood, charcoal, and animal dung

Question 6

Fossil fuels takes ——- out of coal, oil, and natural gas deposits

Answer 6

Carbon

Question 7

CO2 used to make ethanol from trees comes from where?

Answer 7

The air

Question 8

Does CO2 used to make ethanol from trees, when burned, increase the net amount of CO2 in the air?

Answer 8

No

Question 9

Pros of using cellulosic ethanol (switch grass) as energy

Answer 9

Native
Needs little fertilizer and water
Grows on marginal land
Perennial

Question 10

Cons of using cellulosic ethanol as energy

Answer 10

Not produced large-scale
No subsidy available
Enzymes are expensive

Question 11

Does algae biofuel reproduce quickly ?

Answer 11

Yes

Question 12

Bio fuel advantages

Answer 12

Carbon neutral
Lower NOx and SOx
Abundant
Widely distributed
Produced domestically

Question 13

Bio fuel disadvantages

Answer 13

life span ( carbon is emitted)
Costs
Net gain

Question 14

Blade works like an airplane wing, and turns a generator

Answer 14

Wind power

Question 15

What causes uneven heating of earth winds formed from high to low pressure

Answer 15

Geography and topography

Question 16

Denmark produces over _____ percent of thwir electricity needs thround wind power

Answer 16

50

Question 17

Denmark commands——- percent of the global mark for wind turnbines

Answer 17

60

Question 18

2/3 of wind power in the US is attributed to…

Answer 18

Texas, California, Iowa, Minnesota, and Washington

Question 19

Clusters of turbines

Answer 19

Wind farms

Question 20

Fastest growing renewable sector and produces less than .5% of global electricity

Answer 20

Wind

Question 21

Advantages of wind farms

Answer 21

No fuel needed
No pollution
Domestic energy source
No disruptions of single energy plants

Question 22

Disadvantages of wind farms

Answer 22

Bird and bat deaths
Aesthetics
Intermittent winds
Not usually near urban areas

Question 23

Capturing the energy of water moving under the force of gravity

Answer 23

Hydropower

Question 24

Forms if Hydropower

Answer 24

Impoundment Plants
Run of river plants

Question 25

Run of river plants are

Answer 25

Less costly and disruptive Depends on sustained flow

Question 26

Account for 16% of global demand of electricity 2% of global energy Satisfies 100% of Norway and Paraguay’s needs China, Brazil, and Canada re the largest producers

Answer 26

Empowerment dams/ run of river plants

Question 27

Advantages of Hydropower and Dams

Answer 27

No fossil fuels needed No pollution Energy is cheap to produce Power is matched to demand Dams control floods Water retention

Question 28

Disadvantages of hydro power and dams

Answer 28

Effects environment and communities Ecosystem aterations Peak flows no longer seasonal Sediment accumulation Temperature and oxygen in stream change

Question 29

(Solar Impulse ) When did the plane begin it’s first cross-US flight (Cali) and when did it land in NY

Answer 29

May 2013 July 6

Question 30

How long did each leg take

Answer 30

19-25 hrs

Question 31

When the Solar Impulse 2 flew all around the world, where did it land

Answer 31

Abu Dhabi, United Arab Emirates

Question 32

-Heated almost entirely by solar energy -Solar panels provide most of the electricity -South-facing windows are mostly glass and black masonry walls

Answer 32

Visitors center at zion national park in Utah

Question 33

Silicon layer with Phosphorous and Boron

Answer 33

Photovoltaic cell ( solar power)

Question 34

Photovoltaic cell production is growing by

Answer 34

25% / yr

Question 35

Focus sunlight onto water pipes producing steam that is used to turn generator turbines

Answer 35

Concentrating Solar Power

Question 36

When was the first solar car race

Answer 36

1985

Question 37

Solar advantages

Answer 37

Free and renewable No emissions Roof Installations/ space 20,000 jobs and increasing 35% per yr

Question 38

Solar disadvantages

Answer 38

High start up prices High cost of electricity compared to coal Daylight requirement  Geographic limitations Hazards materials used in construction

Question 39

Heat energy generated and stored in earth

Answer 39

Geothermal energy

Question 40

In a dry-steam power plant, underground hot water and steam are used to generate electricity.

Answer 40

Geothermal electriciy

Question 41

We can use Ground Source Heat Pumps for

Answer 41

Heating and Cooling

Question 42

Geothermal reservoirs sufficient for geothermal power plants exist mainly in_______

Answer 42

Western states

Question 43

Advantages of geothermal resources

Answer 43

Reliable & Inexpensive Pollution free GSHP use 30-70% less energy than conventional methods

Question 44

Disadvantages of geothermal resources

Answer 44

Ecosystem disturbance Replenishment rates if ground heat High Start Up Costs Geographic Limitations (Cali, Nevada, Hawaii, and Utah)

Question 45

Using Kinetic energy of tides and waves

Answer 45

Ocean energy

Question 46

Types of ocean energy

Answer 46

Onshore wave energy Tidal Barrage

Question 47

Each day the tide rises and falls 40ft at the barrage in France. The turbines spin and generate electricity as water moves in and out if the bay

Answer 47

Tidal barrage

Question 48

______on the coast if Northern Ireland will generate 1.2 megawatts of renewable energy to the equivalent of 1,000 homes

Answer 48

Tidal turbine

Question 49

Advantages of ocean energy

Answer 49

Renewable and pollution free Low cost of production

Question 50

Disadvantages of ocean energy

Answer 50

Ecosystem disturbances Tidal barrage systems need high tide amplitude Geographic limitations