Introduction To Renewable Energy For Engineers 1St Edition Hagen Actual Script With 100 Percent Correct Answersv

INTRODUCTION TO RENEWABLE ENERGY
FOR ENGINEERS 1ST EDITION HAGEN
ACTUAL SCRIPT WITH 100 PERCENT
CORRECT ANSWERSv

◉ Active Solar Energy Systems
Answer: Solar energy systems that collects energy through the use
of mechanical devices such as photovoltaic cells or heliostats


◉ Passive Solar Energy Systems
Answer: Solar energy systems that collect energy without the use
of mechanical devices
- energy cannot be collected or stored from passive solar energy
- examples: solar cooker, double paned windows, overhang,
skylight, solar water heater, etc.


◉ Most significant concerns with solar energy
Answer: - intermittent
- expensive
- can negatively impact desert environments


◉ Heliostats

, Answer: large stationary tracking mirrors concentrating sunlight
to a central point


◉ Three means of conducting hydroelectric power
Answer: - dams
- run of river systems
- tidal turbine


◉ Current largest source of renewable energy
Answer: hydroelectric


◉ What % of American dams are used to generate electricity
Answer: 3% generate electricity
97% of our dams = untapped energy


◉ Most common motivations for building dams
Answer: - flood control
- recreation


◉ Dam Sedimentation
Answer: Sediments cannot flow through the dam so they build up
at the bottom
- decreases dam efficiency
- costly dredging necessary