Energy Efficiency and Renewable Energy

1
Energy Efficiency and Renewable Energy
G. Tyler Millers Living in the Environment 14th
Edition Chapter 18
2
Key Concepts

• Improving energy efficiency

• Types and uses of solar energy

• Types and uses of flowing water

• Uses of wind energy

• Types and uses of biomass

• Use of geothermal energy

• Use of hydrogen as a fuel

• Decentralized power systems

3
The Importance of Improving Energy Efficiency

• Energy efficiency

• Net energy efficiency

Least Efficient

• Incandescent lights

• Nuclear power plants

• Internal combustion engine

Fig. 18-3 p. 381
4
Energy Efficiencies (Fig. 18-5 p. 381)
5
Ways to Improve Energy Efficiency

• Cogeneration

• Efficient electric motors

• High-efficiency lighting

• Increasing fuel economy

• Alternative vehicles

• Insulation

• Plug leaks

6
Hybrid and Fuel Cell Cars

• Hybrid electric-internal combustion engine

• Fuel cells

Fig. 18-9 p. 385
7
Using Solar Energy to Provide Heat

• Passive solar heating

• Active solar heating

Fig. 18-16 p. 391
8
Using Solar Energy to Provide High-Temperature
Heat and Electricity
Fig. 18-21 p. 395

• Solar thermal systems

• Photovoltaic (PV) cells

Fig. 18-20 p. 394
9
Producing Electricity from Moving Water

• Large-scale hydropower

• Small-scale hydropower

• Pumped-storage hydropower

• Tidal power plant

• Wave power plant

10
Large-scale Hydroelectric Power Trade-offs
Fig. 18-22 p. 396
11
Reviewing the Trade-offs of Hydropower Dams
Fig. 15-9 p. 313
12
Producing Electricity from Wind
Fig. 18-23 p. 396
Fig. 18-24 p. 397
13
Producing Energy from Biomass

• Biomass and biofuels

• Biomass plantations

• Crop residues

• Animal manure

• Biogas

• Ethanol

• Methanol

Fig. 18-25 p. 398
14
Geothermal Energy

• Geothermal heat pumps

• Geothermal exchange

• Dry and wet steam

• Hot water

• Molten rock (magma)

• Hot dry-rock zones

15
The Hydrogen Revolution

• Environmentally friendly hydrogen

• Extracting hydrogen efficiently

• Storing hydrogen

• Fuel cells

16
The Hydrogen Revolution
Fig. 18-31 p. 403
17
Entering the Age of Decentralized Micropower

• Decentralized power systems

• Micropower systems

Fig. 18-32 p. 405
18
Solutions A Sustainable Energy Strategy
Fig. 18-35 p. 407