Benefits and Limitations of Hydroelectric, Wind, Geothermal, and Solar Energy
Fossil fuels are running out. How many more years is our supply estimated to last?
- 200 Years
- 150 Years
- 100 Years
- 50 Years
- 25 Years
Fossil fuel energy dependence generates pollution and is unsustainable; at current usage rates, fossil fuels supplies are anticipated to last for ~50 more years Renewable energy sources like sun, water, and wind are abundant and won't run out over time, but currently only account for 13% of power generation. The biggest challenge in transitioning is replacing each application of fossil fuels: heat, transportation, and electricity
Is Switching to a Fully Renewable Energy Infrastructure Feasible?
What are some of the challenges of switching to renewable energy sources?
In 1 - 2 words, what are some benefits of hydroelectric power generation? (Multiple entries possible)
In 1 - 2 words, what are some drawbacks of hydroelectric power generation? (Multiple entries possible)
Wind power is the conversion of the wind's motion into mechanical energy, and then into electricity. Turbines with spinning blades are used to generate electricity from wind, which is a clean and renewable source of energy. The availability of wind power depends on the geography, topography, and season, and some locations are better suited than others for wind energy generation. Wind power has no direct CO2 emissions and is becoming an increasingly important part of the global electricity supply mix. The cost of wind power has declined significantly in recent years, but there are still challenges related to intermittency, cost, and NIMBY (Not In My Backyard) concerns.
This video addressed two related topics: electric battery production, and geothermal power plants. What are some of the benefits and costs of batteries, like those used in electric vehicles?
This video addressed two related topics: electric battery production, and geothermal power plants. What are some of the benefits and limitations of geothermal power plants?
Uses semiconductor materials to convert solar radiation (light energy) into electrical currents Pros: Cons:
Solar Photovoltaic (PV)
Solar-thermal technology captures heat energy from the Sun for various forms of heating and electricity production. There are two types of solar thermal systems: passive (basic design features) and active (mechanical components like fans or pumps). Concentrated solar power (CSP) uses groups of mirrors to concentrate solar energy on a central collector, producing temperatures high enough to generate steam and drive a generator to produce electricity. Solar thermal energy is clean and renewable but has drawbacks like low concentration of energy, land-use concerns, and intermittent availability of sunlight.
Parabolic Solar (Solar Thermal)
Which of the following is true about photovoltaic solar panels?
- They use mirrors to concentrate sunlight and generate electricity
- They convert solar energy into heat to produce electricity
- They are only effective in hot and sunny climates
- They rely on the photoelectric effect to directly generate electricity
- They require water to generate electricity
Photovoltaic solar panels are made up of photovoltaic cells, which convert sunlight into electricity by using the photoelectric effect. Mirrors are used in parabolic solar systems, not photovoltaic solar panels. Photovoltaic solar panels do not generate heat or require water to generate electricity.
Photovoltaic Solar Check-In Review
How does a parabolic solar collector work?
- It converts sunlight into electricity using photovoltaic cells
- It uses mirrors to concentrate sunlight onto a small area, which heats up a fluid to generate steam and drive a turbine to generate electricity
- It uses a large dish to focus sunlight onto a single point, which generates electricity through the photoelectric effect
A parabolic solar collector is a type of solar thermal technology that uses mirrors to concentrate sunlight onto a small area. This heats up a fluid, such as water, which then generates steam to drive a turbine and generate electricity. This process does not involve photovoltaic cells or the photoelectric effect.
Parabolic Solar Check-In Review
Renewable Portfolio Standard (RPS), Clean Energy Standard (CES), and Renewable Portfolio Goal (RPG) are all policies that aim to increase the use of renewable energy sources for electricity generation Renewable Portfolio Standard (RPS): a regulatory policy that requires electricity suppliers to generate or purchase a certain percentage of their electricity from renewable sources such as wind, solar, geothermal, or biomass. Clean Energy Standard (CES): similar to an RPS, but it is broader in scope. In addition to renewable sources, a CES policy may also include other low-emitting sources of energy such as nuclear power or natural gas with carbon capture and storage (CCS). Renewable Portfolio Goal (RPG): a voluntary policy that sets targets for the amount of renewable energy that should be generated or purchased by the electricity suppliers. In summary, the key difference between RPS, CES, and RPG policies is their level of enforceability. While RPS and CES policies are legally binding and come with penalties for non-compliance, RPG policies are voluntary and lack legal enforcement.
State Goals for Sustainable Energy
40. Personalised Feedback
What do you think would be the best renewable energy technology (or technologies) to invest in for Oregon?