retrofitting bioclimatic building-insulation amit erel, hyoyoung kim, mateo sbresso
TRANSCRIPT
• Introduction
• How can we retrofit house? -Roofs -Windows -Walls
• Further Application & Conclusion
Table of Contents
What is Retrofit?
• Retrofitting is the improving of existing build-ings with energy efficiency equipment.
• In this presentation we will mainly focus on in-sulation efficiency
• Why there is so much heat exchange through roofs?
Roofs
-Convection: Hot air goes up and interacts with exterior air.
-Sunlight directly hits the roof!
1. Double Ceiling
• Adding another layer of ceiling• Inside the layer, it’s vacuum →no convection and conduction
Roofs
2. Add reflective materials (Aluminum foils)
Roofs
-Reflects over 90% of the light it receives
-Acts best in hot countries (like Israel!)
Windows
1. Install Window Insulation film
film which can be appliedto glass windows to reduce heat transfer.
• Window accounts 15~30% of total heat loss of the building.
• Normal window film reduces heat transfer thorught window by maximum 40%
• Average window film costs 10~20$ per one and the heating cost is about 300$ for a
month.
Windows
Epoxy +Cement
• Epoxy: Very high R-value, but too expensive… • Cement: relatively cheap high density→ big thermal mass
Walls
Conclusion
• We use lots of energy in heating&cooling the house
• By retrofitting, we can save a lot of energy, and cost for it.
• There’re many different kinds of retrofitting, and most of them are cost-effective and easy to install.
References
http://en.wikipedia.org/wiki/builing_insulation_materialhttp://en.wikipedia.org/wiki/Thermal_masshttp://www.penny-world.com/technical.htmlhttp://www.bpa.gov/energy/n/energy_tips/weatherization/InsulateCeiling.cfmhttp://en.wikipedia.org/wiki/Window_insulation_filmhttp://en.wikipedia.org/wiki/Insulating_concrete_formhttp://en.wikipedia.org/wiki/Insulating_concrete_form