Question

The wall of a house consists of an outer bricklayer of $e_1$ thickness and an inner layer of $e_3$ thickness. Between the two walls, there is a mineral fiber insulation layer. The thermal conductivity of the inner and outer wall is $k_1$ and $k_3$, that of the insulation $k_2$. The outlet and the inlet of the wall heat transfer by convection are $h_1$ and $h_2$. The overall heat resistance of the multiple layer house wall shall not exceed $R$. insulation thickness $e_2$. (m) Given: $e_1$ (m) = 0.7 $e_3$ (m) = 0.75 $k_1$ (W/mK) = 30 $k_3$ (W/mK) = 35 $k_2$ (W/mK) = 0.05 $h_1$ (W/m2K) = 0.5 $h_2$ (W/m2K) = 2 $R$ (mK/W) = 6

          The wall of a house consists of
an outer bricklayer of $e_1$ thickness
and an inner layer of $e_3$ thickness.
Between the two walls, there is a
mineral fiber insulation layer. The
thermal conductivity of the inner
and outer wall is $k_1$ and $k_3$, that
of the insulation $k_2$. The outlet
and the inlet of the wall heat
transfer by convection are $h_1$ and
$h_2$. The overall heat resistance of
the multiple layer house wall shall
not exceed $R$.
insulation thickness $e_2$. (m)
Given:
$e_1$ (m) =     0.7
$e_3$ (m) =     0.75
$k_1$ (W/mK) =  30
$k_3$ (W/mK) =  35
$k_2$ (W/mK) =  0.05
$h_1$ (W/m2K) = 0.5
$h_2$ (W/m2K) = 2
$R$ (mK/W) =   6

The wall of a house consists of
an outer bricklayer of e1 thickness
and an inner layer of e3 thickness.
Between the two walls, there is a
mineral fiber insulation layer. The
thermal conductivity of the inner
and outer wall is k1 and k3, that
of the insulation k2. The outlet
and the inlet of the wall heat
transfer by convection are h1 and
h2. The overall heat resistance of
the multiple layer house wall shall
not exceed R.
insulation thickness e2. (m)
Given:
e1 (m) = 0.7
e3 (m) = 0.75
k1 (W/mK) = 30
k3 (W/mK) = 35
k2 (W/mK) = 0.05
h1 (W/m2K) = 0.5
h2 (W/m2K) = 2
R (mK/W) = 6

Added by Nicholas R.

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