analysis of the influences of solar radiation and façade glazing ...

3.4 Testing of a building indoor environment during the warm period 80
For a ‘good’ indoor climate, the following value is recommended: -0.5 < PMV < +0.5.
The calculations were performed from 1 April to 15 October. The optical and thermal
characteristics of a high reflect shading device, used in simulations, is presented in Table
3.11.
Table 3.11: Characteristic of a window shading device.
Parameter Value
Solar Transmittance 0.280
Solar Reflectance 0.700
Visible Transmittance 0.280
Visible Reflectance 0.700
Thermal Hemispherical Emissivity 0.850
Thermal Transmittance 0.100
Thickness [m] 0.005
Conductivity [W/mK] 0.100
Shade to Glass Distance [m] 0.050
The solar transmittance value for the shading surfaces is set to 0.3 for the protection
movable shield, 0.2 for trees as detached shading surfaces and 0 for adjacent buildings.
The following four cases were analyzed:
Case 1 - protection facade shields were used to reduce solar gain,
Case 2 - exterior window shades were used to reduce solar gain,
Case 3 - window shades are located on internal sides,
Case 4 - there are not any protection systems (an extremely disadvantageous
situation).
The selected results for four apartments located on the middle storey are presented below.