8/7/2019 Solaveil Data 2011

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Solaveil™  Diffused Daylight Not Sunlight

Telephone

+44 (0) 2920 837 460

Facsimile

+44 (0) 2920 793 867

Email

info@solaveil.co.uk 

www.solaveil.co.uk

Head Office

Suite 8

CBTC2 Off Parkway

Capital Business Park 

Cardiff, UK CF3 2PX 

 TM

Sun Shading - Basic Facts Solaveil™

Human Intervention

Solar shading, or the process of controlling sunlight entering a

building, can be accomplished through a number of different

methods. The techniques generally employed depend on the climate

and the intended use of the space.

For instance, in climates with a high cooling load, sun entering the

space (Solar Heat Gain) will significantly increase cooling energy

needs. In cooler climates, the excess heat from the sun may be

desirable at times, but glare and high contrast ratios may make it

difficult for occupants to work efficiently.

Unfortunately, all building shading systems still required the addition

of internal window blinds to block low-angle sun.

Building occupants seldom adjust their window blinds during the

course of the day; they tend to leave their blinds closed even when

glare-free diffuse daylight could be admitted.

Window blinds are typically more than 50% closed at any time.

It might be expected that occupants would close blinds to exclude

sunlight, and open them again under cloudy skies to admit more

daylight, but results show that occupants set their blinds to a

position in which solar glare is sufficiently excluded under most sky

conditions, and leave the blinds in that position for weeks, months or

even years.

Window blinds in an office building were monitored using

photographs of the façade. The east, south and west facades hadan average of 50%, 66% and 62% occlusion respectively.

Between cloudy days and sunny days, these occlusions varied up or

down from the average by only 10%, 1% and 2% respectively.

Solaveil™ allows some of the daylight incident on the surface to

pass through it undisturbed in the normal way, but intercepts the

majority and redirects it into the room in other directions.

The optical process involves, refraction and reflection, and is

extremely efficient, with virtually no daylight being rejected or

absorbed, and no chromatic aberration (colour fringing) is

introduced into the processed daylight.

Daylight arriving from higher elevations, which is normally wasted

by falling on the floor just inside the window causing glare for

those nearest the window, is intercepted and redirected deep

inside the room where the light is needed most.

This combination of reduced illumination levels near the window

and increased illumination elsewhere means that the room is much

more evenly lit; further enhancing comfort for the occupants.

Moreover, the extra light directed to the back of the room is

relayed there by the room’s normal light coloured ceiling and side

walls, making the additional illumination appear to come from a

generally overhead source, to the further benefit of the occupants’

feeling of wellbeing.

Solaveil™ Daylighting strategies can provide large reductions in

lighting and cooling related energy use, as well as improved

amenity, satisfaction, and occupant performance.

Solaveil™ is a new innovative

technology, with proven

effectiveness at lowering the solar

heat gain coefficient to reduce

cooling, while maintaining thevisual transmission of the glass

to capture daylight savings.

 An integrated design balances

the cooling load of the window

against required day light

illuminance levels, thereby

capturing both cooling and

lighting energy savings without

creating discomfort.

Solaveil™ is a Daylight Activated,

Variable Optical Element (VOE) inthe form of an intelligent,

nanostructured material consisting

of nanometre sized crystallites,

primarily intended for use in

windows, vertical walls and

skylights to enhance the

daylighting performance of

a room and building.

2400

gy(

y)

   P  e  a   k   (   W   /  m   2   )

85 87 88

320

240

Cooling

Single-pane of selective Tint Clear glass (85)

Low-e selective Tint (87)

SolaVeil sV0 (88)

Fans

Lighting

Peak Energy

160

80

80

1800

1200

600

0