Renewable Energy Lecture Notes

These flashcards cover essential concepts and facts related to renewable energy, including types, advantages, and disadvantages of renewable energy sources discussed in the lecture.

What percentage of global electricity generation is attributed to hydropower?

About 16%.

What are the three main types of renewable energy highlighted in the lecture?

Hydropower, wind energy, and solar energy.

What is the primary energy source for biomass fuels?

Biomass fuels are derived from solar energy contained in plant matter.

What is the role of CO2 in the production of biofuels?

CO2 used to make ethanol comes from the air, not the ground, thus it doesn't increase net CO2 when burned.

What is cellulosic ethanol, and why is it significant?

Cellulosic ethanol is derived from plant cellulose and is significant due to low fertilizer needs and potential growth on marginal land.

Which country leads the world in wind power generation?

China.

What are the two types of hydropower plants mentioned?

Impoundment plants and run-of-river plants.

What is a disadvantage of wind power?

It can lead to bird and bat deaths.

How do geothermal heat pumps utilize the Earth's temperature?

They take advantage of stable temperatures below the Earth's surface for heating and cooling.

What are some advantages of biofuels?

Biofuels are carbon neutral, lower NOx and SOx emissions, and are abundantly produced domestically.

What are the disadvantages of solar power?

High start-up costs, geographical limitations, and hazardous materials used in construction.

What is the significance of the Solar Impulse flight?

It was the first plane to fly around the world powered entirely by solar energy.

What do hydropower dams use to accumulate potential energy?

Water stored behind the dam.

How does algae biofuel benefit the environment?

It can clean wastewater and absorb CO2 from the air.

What are the challenges associated with biofuels?

Questions surrounding carbon neutrality and costs of production and transportation.

What is a key feature of concentrating solar power (CSP) systems?

They focus sunlight onto water pipes to produce steam for electricity generation.

What percentage of U.S. electricity is produced from wind power?

About 10%.

What is the primary advantage of hydropower?

No fossil fuels are needed and it emits no pollutants.

What are the consequences of hydropower on ecosystems?

It can alter river ecosystems and flow regimes.

Which state in the U.S. produces the most wind energy?

Texas.

What does the term 'carbon neutral' mean in the context of biofuels?

It means that the CO2 emitted when biofuels are burned is balanced by the CO2 absorbed during their growth.