What is the rate of heat loss through an insulated wall with glass wool?

[kboykb]

Homework Statement

A wall is insulated with glass wool of thermal conductivity K = 0.046 W/m oC. What is the rate of heat loss (in W) through an area 1.0 m wide by 1.5 m high, insulated with a layer of glass wool 20 cm (.2 m) thick, if the temperature difference across the layer is 20.0 oC?

Homework Equations

I think I'm just doing something wrong algebraically. I'm using Q/deltaT = KA * delta T/L

The Attempt at a Solution

Finding the area first (l*w?) = 1.0 m * .2m = .2m

Then

(0.046 * .2) * (20/.2) = .92 degrees

 

[Mapes]

Do your units match up?

 

[kboykb]

I got it right :-) Sorry, I'm a noob. I was plugging in the wrong Area, and it was causing my number to come out wrong.

Thanks!