S P E C I AL P U R P O S E G L A S S E S

PRASHIN PRASHANTH

CO L L E G E O F E N G I N E E R I N G T R I V N D RU M

T H E R M O C H R OMICG L A SS

Thermochromic windows are the most advanced, yet simplest, dynamic window technology available and are quickly growing in popularity and being installed in many commercial, retail and residential buildings throughout the world. The thermochromic glass simply uses heat from direct sunlight to tint the windows when necessary.

Thermochromic Windows

The more direct and intense the sunlight is on the glass the darker it will become. This allows the windows to drastically reduce the heat load coming into the building and because the glass transmission adapts continuously over a range of temperatures, a natural balance and maximum use of daylighting is achieved. By design, thermochromic windows help reduce glare, fading and noise, and increase safety.

Thermochromic windows consist on a common safety interlayer, made from extruding special thermochromic materials into polyvinyl butyral (PVB), laminated between two pieces of heat strengthened or tempered glass and placed into an insulated glass unit (IGU) with a low emissivity coating. A warm edge spacer is also recommended.

. Due to the laminated design, a thermochromic glass laminate can be used as a building block to meet most building codes and design requirements.

The interlayer can be laminated to nearly any tint or thickness of glass and used with high-performance Low-e coatings and specialty glass. Operable or fixed windows, doors and skylights can all be made using thermochromic glass

Windows are known that change between clear and light scattering with changing temperature. This change is based on lower critical solution temperature (LCST) phase change materials that in the past were inadvertently called thermochromic.

These materials are better described as thermotropic since there is a phase change or change in state of the materials and there is no change in "chroma" in these systems. In addition, there are systems based on liquid crystals between crossed polarizers that are sometimes called thermochromic but these liquid crystal systems are also better described as thermotropic.

Fire Protection Glass

Buildings that are vulnerable to fire are fundamentally unsustainable. Fire damage can affect lives and communities, through destruction of jobs and public assets. Combining fire safety and integrity with transparency and the ability to bring light into buildings presents significant technical challenges.

It offer three technology types – wired glass, modified super-toughened glass and a special proprietary clear intumescent interlayer technology. The latter not only protects against flames and smoke, but also against the heat of a fire, and heat transfer mechanisms.All these products can be combined with other functional glasses to provide additional features, such as solar control, thermal insulation, noise control, and impact safety. Unlike other systems dependent on external energy sources and water availability, fire-resistant products offer passive and sustainable protection, with a long-lasting life cycle and reliability.

L O W - E G L A S S

What is Low-E Glass?.

Glass is one of the most popular and versatile building materials used today.

One reason is because of its constantly improving solar and thermal

performance. And one way this performance is

achieved is through the use of passive and solar control low-e coatings

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Low-E Glass"Low-E Glass" refers to a series of high-performance low-emissivity products. The vacuum sputtering process coats glass surfaces with several layers of different materials. Among these, a silver layer effectively reflects infrared rays while maintaining excellent thermal performance.

Beneath the silver layer is an anti-reflective tin oxide (SnO2) base layer that increases the transparency of the glass,Above the silver layer is an isolating nickel-chromium (NiCr) alloy coating.

The main function of the top anti-reflective tin oxide (SnO2) layer is to protect the other coating layers. This product offers the high transparency, low reflectivity, good thermal insulating and energy-saving properties required of modern architectural glass.

‧Almost neutral in color.Highly transparent to visible light ‧

(wavelength 380nm ~780nm), will not cause significant glare problems due to high reflectance of visible light.Allows most sunlight in the visible ‧

range to enter without altering its natural color. Provides excellent natural illumination and saves energy by reducing the need for artificial lighting.

Benefits ：

‧ Relatively high reflectance of infrared radiation (wavelength 780nm~ 3,000nm). In particular, reflects nearly all long-wave infrared(wavelength over 3,000nm). Blocks the entrance of large amounts of heat, and leaves interior comfortably cool in the summer and warm in the winter

‧The right assembly suitable for energy-saving glass curtain walls and skylights in modern Green Building located in hot subtropical areas, such as Taiwan.

Use：

Types of Product：‧ Single Low-E Glass (SLE)Double Low-E Glass (DLE)‧Low-E-Sun Layer Glass (LES)‧Ti-based Low-E Glass (TLE)‧

Specification： ‧ Thickness ： 3mm ~ 19mm Max. size‧ ： 236" x 130" (6000mm

x 3300mm) Min. size‧ ： 39" x 12" (991mm x

305mm) Low-E insulating glass max. size‧ ：

236" x 96" (6000mm x 2440mm)

Solar control glass is a hi-tech product developed by the glass industry to allow sunlight to pass through a window or façade while radiating and reflecting away a large degree of the sun's heat. The indoor space stays bright and much cooler than would be the case if normal glass were used

Solar control glass

Windows - Solar Control Glass

Solar control glass can be used to keep interiors more comfortable by preventing excessive heat buildup in sunny weather without the need for costly air conditioning or blinds.

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Solar control glass has a microscopically thin coating on one side that reflects heat from the sun to the outside. This helps to prevent overheating in conservatories and large areas of glazing. It can also reduce uncomfortable glare from direct sunlight.

How does it work?

Using a solar control glass allows for large areas of glazing without excessive heat buildup in summer. This is particularly useful in glass conservatory roofs or south facing glazed areas.

Benefits

Reflects up to 2/3 heat from the sun to keep interiors cooler, even with large areas of glazing such as conservatories. Less need for costly air conditioning or unsightly blinds for maximum light and a feeling of space. An energy efficient way to keep interiors cooler

Filters uncomfortable glare from the sun, whilst letting in lots of natural light. An attractive and luxurious alternative to plastic roofs.When used in combination with other products, solar control glass for windows provides a range of benefits. These include multi-functional glazing such as thermal insulation (for round-the-year comfort), low-maintenance, noise reduction, decorative value and enhanced safety & security.

APPLICATIONS

For many years architects and designers have been looking for new construction materials that would open up the commer-cial and residential buildings to the exterior world. They have been fascinated with the properties of glass which proved to be the perfect construction material for the modern era. It offers quality and beauty, helps save energy, and allows for easy assembly.

Among its various qualities, there is one which is especially useful for offices and public facilities, namely solar protection. Solar control glass adds character to a building and reduces undesirable heating of the elevation regarding a type of coating.

Types of glassSolar control glass can be divided into absorptive and reflective glass, based on their visual characteristics and the ability to reduce solar radiation. PRESS GLASS offers three types of solar control glass:

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THE ABSORPTIVE float glass, flat and transparent, with blue, brown, grey or green tint. It may be used in single glazing or double glazing. This is applied to reduce the transmittance of solar energy

THE REFLEXIVE float glass – flat and transparent, neutralor dyed to blue, brown, grey or green in the glass structure, while also coated with metal oxides for proper reflective ef-fect. This is applied to control light, and reduce solar energy transmittance. It may be used in single glazing or double glaz-ing – regarding a type of coating.

THE SELECTIVE float glass – flat and transparent, neutralor dyed to blue, brown, grey or green in the glass structure, and coated with a metal oxide multilayer, with the aim of achieving the appropriate effect of reflection, control of isolation of rooms, as well as limiting the penetration of solar energy plus a high level of thermal protection. It may be used only in double glazing.

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