1. Chris Benedict Chapter 15
Building Green

2. Key words Energy acts like a substance Heating Temperature
A conductor and an insulator
R-value
Thermal mass

3. Summary Chris Benedict discusses how she designs “green” structures.
Energy is like substance: can be stored and transferred
Chris explains how a home heating system works.

4. Energy Acts like a substance in many ways
Like matter energy is conserved despite the processes involved.
Can be stored and transferred
But it is not substance. You cannot pick it up.
It does not have weight.
Always moves from an area of higher concentration to an area of lower concentration
Energy diagrams are useful for tracking how energy moves through a system

5. Heating
Occurs when energy is transferred across a system boundary, leading to an increase in the temperature of objects inside the system boundary.

6. Temperature
Is a measure of the hotness or coldness of an object

7. A insulator
Is a material that resists the flow of energy

8. R-Value
Is a measure of the resistance of an insulator

9. A thermal mass
Is a part of a building, such as a thick concrete wall or roof that absorbs and stores energy during the day.
It slowly radiates the energy to the interior of the building at night.

10. Who is Chris Benedict? Environmentalist Construction manager Architect
Material Engineer

11. What problem do green architects try to solve?
Traffic congestion
Environmental and public health problems
Social and criminal problems
Economical and political problems

12. What makes the heating system in Chris’s green building more efficient?
Additional thermostats
Additional fuel
Eco-friendly heaters
Central heating system

13. Provide two examples of an insulator and two examples of an conductor.
Insulator: Wood, fiberboard, fiberglass, Styrofoam cellulose insulation, mineral wool.
Conductor: copper, steel, gold, silver, or any kind of metal.

14. What is the function of each material?
Concrete:
main structural material, thermal mass.
Steel:
main structure material, reinforces concrete plans in floors
Bricks:
outer covering, protects buildings
Insulator:
prevents thermal energy from leaking to the outside.

15. Which is a better insulator, wood or cellulose insulation
Which is a better insulator, wood or cellulose insulation? How do you know?
Cellulose insulation is a better insulator because R-value is higher.