# US 2014/0196395 A1 · Angle-selective irradiation insulation on a building envelope

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- Number: US 2014/0196395 A1
- Document ID: US20140196395A1
- Status: Published application
- Kind: A1
- Application number: 14/128,495
- Filed: 2012-06-20
- Published: 2014-07-17
- Earliest claimed: 2011-06-21
- Assignees: Solar Campus GmbH
- Inventors: Stephan A. Mathez; Walter Sachs
- Web page: https://patentgrep.com/patent/US20140196395A1

## CPC

- E04B 1/62: Insulation or other protection; Elements or use of specified material therefor (chemical compositions C01 - C11; implements for applying insulation or sealings E04F21/00; buildings to withstand, or to provide protection against, external undesired influences E04H9/00; sealing pipes in walls or partitions F16L5/02; shielding against dangerous radiation G21F)
- E06B 3/6722: {with adjustable passage of light}
- F24S 50/80: for controlling collection or absorption of solar radiation
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- F24S: SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS (for producing mechanical power from solar energy F03G6/00)

## Abstract

In a method for producing a building envelope part (19) for angle-selective irradiation insulation on a building envelope, which building envelope part (19) has an outer surface (29), an inner surface (39) opposite the outer surface (29), and a side edge that bounds the outer surface (29) and the inner surface (39), the outer surface (29) is provided with outer structures (219) and the inner surface (39) is provided with inner structures (319). The outer structures (219) and the inner structures (319) are arranged relative to each other in such a way that the building envelope part (19) has different transparency depending on the spatial angle of incidence. The outer structures (219) and the inner structures (319) are arranged in particular with regard to an orientation of an intended application of the building envelope part (19) and with regard to the latitude of the intended application of the building envelope part (19). By means of the design of the outer structures and the inner structures according to the invention, it is possible that the outer structures and the inner structures are arranged in such a way that a building envelope comprising the building envelope part is optimally adapted to an orientation and in particular to an orientation deviating from southern orientation, to tilted or horizontal arrangements, or to an arbitrary latitude. Thus the transmittance behavior of the building envelope part can be accordingly optimized for the particular situation.

## Claims

### Claim 1

A building envelope part (1; 17; 18; 19) for angle-selective irradiation insulation, wherein the building envelope part (1; 17; 18; 19) comprises an outer surface (2; 27; 28; 29) with outer structures (21; 217; 218; 219), an inner surface (3; 37; 38; 39) opposite the outer surface (2; 27; 28; 29) with inner structures (31; 317; 318; 319) and a side edge (5) that borders the outer surface (2; 27; 28; 29) and inner surface (3; 37; 38; 39), wherein the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are arranged relative to each other in such a way that the translucency of the building envelope part (1; 17; 18; 19) varies as a function of the spatial angle of incidence, characterized in that the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are arranged at an acute angle to the side edge (5).

### Claim 2 (depends on 1)

The building envelope part (1; 17; 18; 19) according to claim 1, in which the outer structures (21; 217; 218; 219) are arranged as light diffusers, and the inner structures (31; 317; 318; 319) are arranged as optically opaque.

### Claim 3 (depends on 1)

The building envelope part (1; 17; 18; 19) according to claim 1, in which the outer structures (21; 217; 218; 219) are prismatic, and the inner structures (31; 317; 318; 319) are optically opaque in design.

### Claim 4 (depends on 2, 3)

The building envelope part (1; 17; 18; 19) according to claim 2 or 3, in which the inner structures (31; 317; 318; 319) are designed as light reflectors.

### Claim 5 (depends on 2, 3)

The building envelope part (1; 17; 18; 19) according to claim 2 or 3, in which the inner structures (31; 317; 318; 319) are arranged as light absorbers, wherein the light absorbers are photovoltaic light absorbers.

### Claim 6 (depends on 1)

The building envelope part (1; 17; 18; 19) according to claim 1, in which the outer structures (21; 217; 218; 219) comprise parallel stripes arranged in a common plane, and the inner structures (31; 317; 318; 319) comprise parallel stripes arranged in a common plane.

### Claim 7 (depends on 6)

The building envelope part (1; 17; 18; 19) according to claim 6, in which the outer structures (21; 217; 218; 219) are arranged parallel to the inner structures (31; 317; 318; 319), wherein the common plane of the outer structures (21; 217; 218; 219) and the common plane of the inner structures (31; 317; 318; 319) are different.

### Claim 8 (depends on 1)

The building envelope part (1; 17; 18; 19) according to claim 1, in which the outer structures (21; 217; 218; 219) are arranged in a direction perpendicular to the outer surface (2; 27; 28; 29) and to the inner surface (3; 37; 38; 39), offset in relation to the inner structures (31; 317; 318; 319).

### Claim 9 (depends on 1)

The building envelope part (1; 17; 18; 19) according to claim 1, in which the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are essentially lamellar in design.

### Claim 10

A method for manufacturing a building envelope part (1; 17; 18; 19) for angle-selective irradiation insulation, wherein the building envelope part (1; 17; 18; 19) comprises an outer surface, an inner surface (3; 37; 38; 39) opposite the outer surface (2; 27; 28; 29), and a side edge (5) that borders the outer surface (2; 27; 28; 29) and inner surface (3; 37; 38; 39), in which the outer surface (2; 27; 28; 29) is provided with outer structures (21; 217; 218; 219) and the inner surface (3; 37; 38; 39) is provided with inner structures (31; 317; 318; 319), wherein the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are arranged relative to each other in such a way that the translucency of the building envelope part (1; 17; 18; 19) varies as a function of the spatial angle of incidence, characterized in that the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are arranged taking into account the orientation of a provided application of the building envelope part (1; 17; 18; 19) and taking into account the latitude of the provided application of the building envelope part (1; 17; 18; 19).

### Claim 11 (depends on 10)

The method according to claim 10, in which the longitudinal axes of the outer structures (21; 217; 218; 219) and inner structures (31; 317; 318; 319) are aligned parallel to an intersecting line between the plane of the solar ecliptic and the plane of the building envelope part (1; 17; 18; 19) in the provided application if the building envelope part (1; 17; 18; 19) can be reached by direct solar radiation on all days of a calendar year in the provided application.

### Claim 12 (depends on 11)

The method according to claim 11, in which the acute angle between the outer structures (21; 217; 218; 219) and side edge (5) or between the inner structures (31; 317; 318; 319) and side edge (5) is established by a mathematical expression that correlates the variables ω, β, γ and φ, preferably according to the equation
ω
=
-
sgn

(
φ
*
sin

(
γ
)
)
*
arccos

(
sin

(

φ

)
*
sin

(
β
)
+
cos

(

φ

)
*
cos

(
β
)
*
cos

(
γ
)
cos

(

φ

)
*
cos

(
β
)
+
sin

(

φ

)
*
cos

(
γ
)
*
sin

(
β
)
)
2
+
sin
2

(
γ
)
*
sin
2

(
β
)
)
wherein ω is the acute angle, β is an inclination, and γ is an alignment of the building envelope part (1; 17; 18; 19) in the provided application, and φ is the latitude in the provided application.

### Claim 13 (depends on 10)

The method according to claim 10, in which a first projected angle of incidence with a maximum light transmittance through the building envelope part (1; 17; 18; 19) is established.

### Claim 14 (depends on 10)

The method according to claim 10, in which a second projected angle of incidence with a minimum light transmittance through the building envelope part (1; 17; 18; 19) is established.

### Claim 15 (depends on 13)

The method according to claim 13, in which the building envelope part (1; 17; 18; 19) is configured in such a way that the outer structures (21; 217; 218; 219) comprises parallel stripes arranged in a common plane, and the inner structures (31; 317; 318; 319) comprises parallel stripes arranged in a common plane.

### Claim 16 (depends on 15)

The method according to claim 15, in which the building envelope part (1; 17; 18; 19) is configured in such a way that the outer structures (21; 217; 218; 219) are arranged parallel to the inner structures (31; 317; 318; 319), wherein the common plane of the outer structures (21; 217; 218; 219) and the common plane of the inner structures (31; 317; 318; 319) are different, and that the stripes of the outer structures (21; 217; 218; 219) and stripes of the inner structures (31; 317; 318; 319) are established by a mathematical expression that correlates the variables r, d, α± and n, preferably according to the equation
r
d
=
sin

(
α
+
)
n
2
-
sin
2

(
α
+
)
-
sin

(
α
-
)
n
2
-
sin
2

(
α
-
)
,
wherein r is the width of one of the stripes of the inner structures (31; 317; 318; 319), d is the thickness of the building envelope part (1; 17; 18; 19), n is the average refraction index of the building envelope part (1; 17; 18; 19), α+ is the first projected angle of incidence, and α− is the second projected angle of incidence.

### Claim 17 (depends on 15)

The method according to claim 15, in which the building envelope part (1; 17; 18; 19) is configured in such a way that a width of the stripes of the exterior side, a width of the stripes of the interior side, and a respective distance between the stripes are essentially identically dimensioned.

### Claim 18 (depends on 10)

A computer program comprising a program code structure configured to implement the method according to claim 10 when being executed on a computer.

### Claim 19 (depends on 11)

A computer program comprising a program code structure configured to implement the method according to claim 11.

### Claim 20 (depends on 12)

A computer program comprising a program code structure configured to implement the method according to claim 12.