glassdbase: Velux

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Velux: 57E

(int) 6mm laminated, 14mm 95% Argon, 4mm tempered V7:N2 (ext)
Velux

Reference number: X001

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
0.222	0.439	0.506	0°
0.220	0.436	0.505	15°
0.214	0.426	0.502	30°
0.200	0.399	0.501	45°
0.192	0.382	0.502	50°
0.181	0.359	0.504	55°
0.166	0.327	0.508	60°
0.145	0.283	0.514	65°
0.132	0.255	0.518	67.5°
0.118	0.225	0.523	70°
0.102	0.192	0.529	72.5°
0.084	0.157	0.535	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
0.250	0.326	15°
0.252	0.330	30°
0.262	0.345	45°
0.269	0.354	50°
0.281	0.369	55°
0.298	0.392	60°
0.324	0.426	65°
0.343	0.449	67.5°
0.365	0.477	70°
0.391	0.508	72.5°
0.419	0.540	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
0.530	0.454	15°
0.535	0.457	30°
0.538	0.455	45°
0.539	0.455	50°
0.538	0.450	55°
0.536	0.442	60°
0.531	0.429	65°
0.525	0.418	67.5°
0.517	0.405	70°
0.508	0.390	72.5°
0.497	0.376	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
0.269*	0.426*	0°
0.267	0.425	15°
0.261	0.420	30°
0.248	0.405	45°
0.240	0.397	50°
0.229	0.384	55°
0.214	0.365	60°
0.192	0.339	65°
0.179	0.321	67.5°
0.164	0.301	70°
0.147	0.278	72.5°
0.128	0.254	75°

* Extrapolated value

Selectivity index T_v/g [info] Diagram

Selectivity index T_v/g

T_v/g	Angle of incidence
1.632*	0°
1.632	15°
1.630	30°
1.612	45°
1.595	50°
1.569	55°
1.529	60°
1.468	65°
1.426	67.5°
1.375	70°
1.309	72.5°
1.226	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 = 7.34°C

Coefficients of functions
T_e, T_v, A_e [info]

T_e	T_v	A_e
-0.021473	-0.043831	-0.84329
-0.00029576	-0.00042297	0.00019575
0.47642	0.68924	1.0371
69.548	71.053	93.659
9.8286	9.7028	5.2627
1.9436	1.4207	0.75675

Secondary internal heat transfer factor [info]

q_i/A_e(φ=0°) = 0.089

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]