glassdbase: Velux

Deutsch Français English

The independent and comprehensive database for building glass. Methods of measurements Glossary

Show list of glasses

Velux: 60G

(int) 6mm laminated, 12mm 95% Krypton, 6mm tempered V9:N2 (ext)
Velux

Reference number: X007

Brief information Transmittance Total solar energy transmittance Selectivity index General color rendering index

Transmittance T_e, T_v, T_e/T_v Diagram

	Solar direct transmittance T_e [info]
	Light transmittance T_v [info]
	T_e/T_v [info]

T_e	T_v	T_e/T_v	Angle of incidence
0.266	0.620	0.429	0°
0.262	0.615	0.426	15°
0.252	0.603	0.419	30°
0.232	0.568	0.409	45°
0.222	0.546	0.406	50°
0.207	0.515	0.403	55°
0.189	0.472	0.400	60°
0.164	0.414	0.397	65°
0.149	0.378	0.396	67.5°
0.133	0.338	0.394	70°
0.115	0.292	0.392	72.5°
0.095	0.243	0.389	75°

Reflectance R_e, R_e' Diagram

	Solar direct reflectance R_e [info]
	Solar direct reflectance, inverted light propagation R_e' [info]

R_e	R_e'	Angle of incidence
0.335	0.342	15°
0.335	0.346	30°
0.345	0.362	45°
0.351	0.371	50°
0.362	0.387	55°
0.375	0.409	60°
0.398	0.442	65°
0.415	0.464	67.5°
0.437	0.491	70°
0.460	0.522	72.5°
0.487	0.553	75°

Absorptance A_e, A_e' Diagram

	Solar direct absorptance A_e [info]
	Solar direct absorptance, inverted light propagation A_e' [info]

A_e	A_e'	Angle of incidence
0.403	0.396	15°
0.412	0.402	30°
0.422	0.406	45°
0.428	0.408	50°
0.431	0.406	55°
0.436	0.403	60°
0.438	0.394	65°
0.435	0.387	67.5°
0.430	0.376	70°
0.425	0.363	72.5°
0.418	0.352	75°

Total solar energy transmittance g, g' Diagram

	Total solar energy transmittance g [info]
	Total solar energy transmittance, inverted light propagation g' [info]

g	g'	Angle of incidence
0.302*	0.414*	0°
0.299	0.412	15°
0.290	0.405	30°
0.271	0.387	45°
0.261	0.376	50°
0.247	0.362	55°
0.229	0.342	60°
0.205	0.314	65°
0.190	0.296	67.5°
0.173	0.276	70°
0.154	0.253	72.5°
0.133	0.229	75°

* Extrapolated value

Selectivity index T_v/g [info] Diagram

Selectivity index T_v/g

T_v/g	Angle of incidence
2.053*	0°
2.058	15°
2.076	30°
2.094	45°
2.093	50°
2.086	55°
2.064	60°
2.023	65°
1.993	67.5°
1.955	70°
1.902	72.5°
1.827	75°

* Extrapolated value

Transmittance Reflectance Absorptance Color rendering
Dynamic temperature simulation of a standard room

Spectral transmittance T [info] Diagram


0°	15°	30°	45°	50°	55°	60°	65°	67.5°	70°	72.5°	75°

Spectral reflectance R [info] Diagram


15°	30°	45°	50°	55°	60°	65°	67.5°	70°	72.5°	75°

Spectral reflectance, inverted light propagation R' [info] Diagram


15°	30°	45°	50°	55°	60°	65°	67.5°	70°	72.5°	75°

Spectral absorptance A [info] Diagram


15°	30°	45°	50°	55°	60°	65°	67.5°	70°	72.5°	75°

Spectral absorptance, inverted light propagation A' [info] Diagram


15°	30°	45°	50°	55°	60°	65°	67.5°	70°	72.5°	75°

Maximum temperature rise in temperature simulation (°C) [info]

ΔT_max = 8.04°C

Coefficients of functions
T_e, T_v, A_e [info]

T_e	T_v	A_e
-0.028434	-0.11229	-1.0526
-0.00040351	-0.00047474	0.00071501
0.53148	0.8566	1.2117
69.789	74.966	94.555
10.839	10.184	4.8053
1.7975	1.1664	0.83848

Secondary internal heat transfer factor [info]

q_i/A_e(φ=0°) = 0.092

Dynamic temperature simulation of a standard room [info]

Location: ZÃ¼rich
Time period: 1. August - 10. August
Orientation of windows: South
Air change rate: 1.0
initial temperature: 20° C
Standard room: 1A [info]