Increasing Energy Efficiency of Windows

[vineettyagi]

Hello. I am doing a project about using metallic coatings on windows to increase energy efficiency. An instrument called a sputter coater is needed to apply the coating and I do not have access to one. So, I am presenting my project as a theoretical one. I have done calculations to see how thick the aluminum coatings need to be to reflect certain amounts of light to reduce heat within buildings. Does anyone know if there are equations that can relate heat/temperature change based on light absorption so I can have some theoretical data about how the coatings would affect temperature?

[deleted-71552]

Hello. I am doing a project about using metallic coatings on windows to increase energy efficiency. An instrument called a sputter coater is needed to apply the coating and I do not have access to one. So, I am presenting my project as a theoretical one. I have done calculations to see how thick the aluminum coatings need to be to reflect certain amounts of light to reduce heat within buildings. Does anyone know if there are equations that can relate heat/temperature change based on light absorption so I can have some theoretical data about how the coatings would affect temperature?

Hi, vineettyagi!

This topic is *WAY* outsie of my area of expertise, but I did a little searching on the Internet. I got the best results when I used Google to look for "calculate heat absorption windows". What I found were descriptions of ways other people have performend the kind of calculations you are asking about. I took note of the fact that there are many variables, including absorbtion and reflective properties based on frequency, and the angle of incidence.

One paper that seemed to contain information similar to what you've asked about can be found here:

http://www.p2pays.org/ref/18/17942.pdf

Many of the articles I found had references that may be additional leads for you to follow.

Bravo to you for taking on such a challenging project. I wish you great success.