Fig. 1.
Fig. 2.
Fig. 3.
Calculation of the thermal transmittance of the window (own research)
| Physical quantity | Unit | Value |
|---|---|---|
| Temperature mean surrounding panel | °C | 4.0 |
| Thermal resistance of the surrounding panel | (m2·K)/W | 1.7 |
| Thermal conductivity of surrounding panel | W/(m·K) | 0.035 |
| Ψ edge for w = 40 mm | W/(m·K) | 0.0262 |
| Temperature difference surface, surrounding panel | K | 28.1 |
| Temperature difference air | K | 32.7 |
| Input power to hot box | W | 31.5 |
| Power through surrounding panel | W | 16.5 |
| Edge zone heat flow | W | 2.5 |
| Heat flow density through specimen | W/m2 | 19.5 |
| Warm side convective fraction | – | 0.3 |
| Cold side convective fraction | – | 0.85 |
| Mean radiant temperature warm side | °C | 21.2 |
| Mean radiant temperature cold side | °C | –11.0 |
| Warm side environmental temperature | °C | 21.3 |
| Cold side environmental temperature | °C | –11.0 |
| U-value measured | W/(m2·K) | 0.60 |