Paying to Warm Up Provo

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Paying to Warm Up Provo
Nathan Hill Jon Marshall
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• Huge Gas Bills!
• Water Heater
• Gas stove/oven
• Gas Dryer
• -- Gas Heater!! --

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• Windows are a huge source of energy loss
• Convection
• leaks
• Conduction
• K1.4
• Radiation
• Night lose heat
• Day gain heat

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• Single Pane Windows are the Worst!
• Most students in Provo live in houses with
  windows more like this

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Example of Double-Pane
Construction
Double pane utilizes the lower convection
coefficient of various gases between the
panes. But they can be expensive.
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Picture of box here

• Alternative
• Plastic Insulation
• Several Options at any hardware store
• This product is available at Home Depot

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Picture of us installing here

• Installation
• Installs with double sided tape
• Blow dry with hair dryer until taught
• Installed in 3 5 min

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window

• Is it worth it?
• We wanted to compare the heat flux between the
  single pane and the plastic insulated window
• We wanted to find out how much it really helps

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window

• Single Pane Analysis

Ti 295 K
To 292 K
K 1.4
q 165.4 W/m2
L .003175 m
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• Plastic Insulation Analysis

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Picture of box here
Here are the Numbers Typical Gas Heater
efficiency 75
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Picture of box here
We want to know how much we can save! Energy
Cost Natural Gas 10.00/Mbtu
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Picture of box here

• Assumptions
• Heat radiation into and out of the windows is
  negligible
• Constant outside temperature throughout the month
• With plastic outside surface window temp
  inside surface temp