Quote Originally Posted by StarsOfCCTV View Post
Kind of...I have this so far

For the basic calculation..
Heat loss
Side/Inside of insulation box: Loft insulation experiment
Temperature side:
5 minutes = 22.0oC

Temperature inside:
5 minutes = 23.4oC

U-Value of loft insulation: 0.16W/m2K
Area of top: 30 x 60 = 120 cm2
Temperature difference: 1.4oC

Heat lost per second (W) = U-Value x area x temperature difference
= 0.16 x 120 x 1.4

(And I have worked this out one of the experiments - found the U value of aluminium online lol)

U-Value
The lower the U-value, the better an insulator the material is. It is measured in W/m2K and shows the amount of heat lost in watts (W) per square metre of material when the temperature (K) is one degree lower outside.

The term “U” value represents overall thermal conductance from the outside to the inside covering all modes of heat transfer. It can be defined as the heat flow over unit area of any building component through unit overall temperature difference between both sides of the component. The U-value is an important way of showing how well an element conducts heat from one side to another, which makes it the reciprocal of its thermal resistance. So, if the thermal resistance is worked out, it can be inverted to obtain the U-value.
U = 1 / Rt
U = 1/ (R so + ∑Rn + Rsi)

[COLOR="rgb(255, 140, 0)"]See how I'm confused [/COLOR]
What do you need to work out? It kinda makes sense.