Lecture 2: Energy Transitions and Vocabulary Flashcards
(23 cards)
U.S. total consumption in Quads
98 quads
World total consumption in Quads
531 quads
2013 U.S./World energy consumption by fuel
84/86% fossil fuels - 13.6/13.3 other sources
Three shifts in energy transition
- Change in total demand for energy
- Change in end uses for energy
- Change in sources of energy
Energy
Quantity - Ability to do work
Power
Rate - Work over time
Scientific Unit for Fuels
BTU - British thermal Units
Quad - 1 quadrillion Btu
Joules (j, kj, Mjj)
Scientific Unit for Fuels
BTU - British thermal Units
Quad - 1 quadrillion Btu
Joules (j, kj, Mj)
Scientific Unit for Electricity
kWh - Kilowatt hour
MWh - Megawatt hour
GWh- Gigawatt hour
Proxi units for Volume
Barrels of energy (boe)
Barrels of oil equivalent (Boee)
Cubic Feet
Proxi units for mass
Assumes a gravimetric energy density
Tons of energy
tonnes of oil equivalent
kg of energy (kgoe)
Energy
Quantity - Ability to do work
Energy = Power x time
Light consumes energy at a rate of 100W
Power
Rate - Work over time
Energy produced over a period of time
Energy consumed over a period of time
Nucleal Power Plant Power Capacity
1 GW
After 1 hour it generates 1 Gwh of electricity
After 1 year it generates 8760 hours per year
Converting GWh to kWh
1 GWh = 1 million kwh
Total U.S. electricity in 2011
4000 billion kwh
Primary Energy
- Petroleum
- Natural gas
- Coal
- Biomass
- Water
- Wind
- Solar
Secondary Energy
Converted/Stored Energy
Secondary Energy
Converted/Stored Energy
- electricity
- hydrogen
- pumped hydroelectric
Blue barrel
42 gallons
Energy Notation
MW - megawatts - 1 million watts
MMBTU - Million Btu -
Kwh to Btu Conversion
1 [Kwh] = 3412 [Btu]
Natural gas conversion
1000 Standard Cubic Feet (SCF) = 1 Million Btu
