Transcript chapter18

Energy Efficiency and Renewable Energy
G. Tyler Miller’s
Living in the Environment
14th Edition
Chapter 18
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
The Importance of Improving
Energy Efficiency

Energy efficiency

Net energy efficiency
Least Efficient

Incandescent lights

Nuclear power plants

Internal combustion engine
Energy Efficiencies
Ways to Improve Energy
Efficiency
(Fig. 18-5 p. 381)

Cogeneration

Efficient electric motors

High-efficiency lighting

Increasing fuel economy

Alternative vehicles

Insulation

Plug leaks
Hybrid and Fuel Cell Cars
 Fuel cells
 Hybrid electricinternal combustion
engine
Using Solar Energy to Provide
High-Temperature Heat and
Electricity
 Solar thermal systems *
 Photovoltaic (PV) cells
Using Solar Energy to Provide Heat
 Passive solar heating
Examples:
Enertia home
 Active solar heating
Solar thermal
Photovoltaic
Earthships
Fig. 18-16 p. 391
Producing Electricity from Moving Water
 Large-scale hydropower
 Tidal power plant
 Small-scale hydropower
 Wave power plant *
 Pumped-storage hydropower *
Producing Electricity from Wind
Producing Energy from Biomass
 Biomass and biofuels
 Crop residues
 Animal manure *
 Biogas
 Ethanol
 Methanol
Bio-fuels
Bio-fuels Overview
Ethanol
pros
cons
Methanol
Geothermal Energy
 Geothermal heat pumps
 Geothermal exchange
 Dry and wet steam
 Hot water
 Molten rock (magma)
 Hot dry-rock zones
examples
The Hydrogen Revolution
 Environmentally friendly hydrogen
 Extracting hydrogen efficiently
 Storing hydrogen
 Fuel cells
Fig. 18-31 p. 403
Entering the Age of Decentralized
Micropower
 Decentralized power systems
 Micropower systems
Fig. 18-32 p. 405
Solutions: A Sustainable Energy
Strategy
Fig. 18-35 p. 407