Why is aerogel used as an insulating material in skylights?

  • Thread starter felipe douglas
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In summary: Insulation can be useful in the summer too. Why doesn't the explanation in C make sense?In summary, the four options are a) winter, where cool air near the lower pane, hot air near the upper pane; b) winter, where hotter air near the lower pane, cool air near the upper pane; c) summer, where hotter air near the lower pane, cool air near the upper pane; d) summer, where cool air near the lower pane, hot air near the upper pane.
  • #1
felipe douglas
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Homework Statement


Your house will have several skylights. To minimize heat flow, each skylight will have two transparent panes separated by an intermediate layer. Since visibility through the skylight isn't important, the gap between the panes will be filled with aerogel: a porous, ultralight translucent material that is almost 100% gas. Why not just use the gas alone? Why add the porous framework of the aerogel?

a. During the cold winter, natural buoyance causes gas to rise from the cooler lower pane to the hotter upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the upper pane to the lower pane. The porous framework prevents such convection.
b. During the cold winter, natural buoyance causes gas to rise from the hotter lower pane to the colder upper pan. Many convection cells develop in between the panes and heat is carried efficiently from the lower pane to the upper pane. The porous framework prevents such convection.
c. During the hot summer, natural buoyance causes gas to rise from the hotter lower pane to the colder upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the lower pane to the upper pane. The porous framework prevents such convection.
d. During the hot summer, natural buoyance causes gas to rise from the cooler lower pane to the hotter upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the upper pane to the lower pane. The porous framework prevents such convection

Homework Equations


none

The Attempt at a Solution


C? because Natural buoyancy causes hotter air to rise in colder air.[/B]
 
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  • #2
Start with examining the difference between the four options.
a] winter: cool air near lower pane, hot air near upper pane
b] winter: hotter air near lower pane, cool air near upper pane
c] summer: hotter air near lower pane, cool air near upper pane
d] summer: cool air near lower pane, hot air near upper pane

Do these all make sense? Can you rule any out?
 
  • #3
DaveC426913 said:
Start with examining the difference between the four options.
a] winter: cool air near lower pane, hot air near upper pane
b] winter: hotter air near lower pane, cool air near upper pane
c] summer: hotter air near lower pane, cool air near upper pane
d] summer: cool air near lower pane, hot air near upper pane

Do these all make sense? Can you rule any out?
can definitely rule out D
 
  • #4
im thinking B or C? since the air is hotter in the lower pane..
 
  • #5
felipe douglas said:
im thinking B or C? since the air is hotter in the lower pane..
What exactly is the difference in the wording between b and c? Which of them would be a reason for the aerogel?
 
  • #6
haruspex said:
What exactly is the difference in the wording between b and c? Which of them would be a reason for the aerogel?
since aerogel helps to insulate heat, it would be helpful during the winter? (B?)
 
  • #7
felipe douglas said:
since aerogel helps to insulate heat, it would be helpful during the winter? (B?)
Insulation can be useful in the summer too. Why doesn't the explanation in C make sense?
 

Related to Why is aerogel used as an insulating material in skylights?

What is an energy efficient house?

An energy efficient house is a home that is designed and built to use less energy while still providing a comfortable living space. This includes using energy-efficient materials, appliances, and systems.

Why is energy efficiency important for houses?

Energy efficiency is important for houses because it reduces the amount of energy needed to maintain a comfortable living space, which in turn helps to reduce energy costs and greenhouse gas emissions. It also helps to create a more sustainable environment for future generations.

What are some features of an energy efficient house?

Some features of an energy efficient house include proper insulation, energy-efficient windows and doors, efficient heating and cooling systems, and the use of renewable energy sources such as solar panels or geothermal systems.

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How can I make my house more energy efficient?

There are several ways to make your house more energy efficient, including adding insulation, upgrading to energy-efficient appliances, sealing air leaks, using natural light and ventilation, and incorporating renewable energy sources. Consulting with a professional energy auditor can also help identify specific areas for improvement.

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