Design a $1m1m$ window capable of maintaining the temperature of

a $1\mathrm{.}21\mathrm{.}20\mathrm{.}8$ furnace at a near constant temperature $($within a few

degrees of initial temperature$)$ over the timespan $20$ minutes, assuming

the outside temperature is $OC$ and the required inside temperature is

$100C.$

Note: Assume the $1m1m$ window will be centralised on the $1\mathrm{.}2mx$

$1\mathrm{.}2m$ furnace face, and that the furnace will be at $100C$ initially with no heat source. show all calculations: the gas used has k value $0\mathrm{.}018$ W$/($mK$)$ & the material used for the panes is glass with a k value of $0\mathrm{.}96$ W$/($mK$).$ Explain how to use the following equation:

$T_v=\frac{-T*t}{R_{Th}**V*Cv}$

For triple glazed window

$R_{Th}=\frac{1}{h_{0}A}+\frac{x_1}{k_{1}A}+\frac{x_2}{k_{2}A}+\frac{x_3}{k_{3}A}+\frac{x_4}{k_{4}A}+\frac{x_5}{k_{5}A}+\frac{1}{h_{6}A}$