L1 - Global energy perspectives Flashcards
Which are the challenges for the energy systems?
Challenges of energy security, economic competitiveness, climate change, and other environmental issues, driven by a variety of factors ranging across technology readiness, market demand, and public policy
What is a duck curve?
The duck curve—named after its resemblance to a duck—shows the difference in electricity demand and the amount of available solar energy throughout the day. When the sun is shining, solar floods the market and then drops off as electricity demand peaks in the evening.
What is primary energy?
Primary energy consists of unconverted or original fuels.
For example, primary energy sources include petroleum, natural gas, coal, biomass, flowing water, wind, and solar radiation. Those are the fuels that can be mined, reaped, extracted, harvested, or harnessed directly.
What is secondary energy?
Secondary energy is all energy obtained from transforming primary energy into electrical power
What is final energy?
Final or available energy is the energy delivered to consumers for end consumption (petrol at the pump, electricity in the household, etc.)
What is and give examples of end use.
End-use technologies convert final energy to useful energyto meet energy servicedemand
- Feedstocks
- Transportation
- Industry
- Residential & commercial
What happens when energy is converted?
Energy losses
Which step has the highest energy loss?
End use (useful to final energy)
Which end use sector has the highest loss?
Transportation
Which primary source dominates?
Oil
What is an energy system?
- ”All componentsrelatedto the production, conversion, delivery, and useof energy” (IPCC AR5)
- ”the technicaland economicsystems thatsatisfyconsumerdemandfor energyin the forms of heat, fuels, and electricity”
What is the energy efficiency of the global energy system?
34%
