- #1
stunner5000pt
- 1,465
- 4
- Homework Statement
- Consider a room in a house that has composite walls with some heat resistance R(tot). The total cross sectional area of the walls in 35 m^2. During winter, the temp outside is -5 deg C. Inside there is an electric heater emitting heat at a rate of 400 W so the room temperature is constant at 18 deg C. The room is occupied by 2 people each emitting 80 W each. What is the heat resistance of the walls in W?
- Relevant Equations
- [tex] \frac{dQ}{dt} = \frac{T_{out} - T_{in}}{R_{tot}} [/tex]
I believe that just using the equation above should yield the following:
[tex] R_{tot} = \frac{18 -(-5)}{400 + 2(80)} = 0.041 [/tex]
but the units don't seem to match up... The units of the above answer are in K / W.
Is there a different formula i should be using?
Your help is appreciated!
[tex] R_{tot} = \frac{18 -(-5)}{400 + 2(80)} = 0.041 [/tex]
but the units don't seem to match up... The units of the above answer are in K / W.
Is there a different formula i should be using?
Your help is appreciated!