lecture 21 Flashcards
1
Q
Define energy efficiency
A
The ability to do more useful work with less energy input
2
Q
Define net energy efficiency
A
The combined total efficiency of each step in a energy transfer system
3
Q
What is Cogeneration?
A
A practice used to improve energy efficiency by producing multiple forms of energy from the same fuel source
4
Q
What is a way to improve energy efficiency besides cogeneration?
A
upgrade older technologies and replace them with newer versions
5
Q
What percent of global energy production does renewable sources make up
A
10%
6
Q
How can we reduce heating and cooling costs?
A
-Super insulating, reduces heat loss from inside and limits heat gain from outside
7
Q
what are some other ways to reduce heating/cooling costs?
A
- insulate and fix leaks
- replace old windows
- utilize more efficient heating methods
