what is solar control glass?
Glass manages solar heat radiation by three mechanisms: reflectance, transmittance and absorption
These are defined as follows:
1. Reflectance – the proportion of solar radiation reflected back to the atmosphere.
2. Direct transmittance – the proportion of solar radiation transmitted directly through the glass.
3. Absorption – the proportion of solar radiation absorbed by the glass.
What is laminated glass?
A type of safety glass that holds together when shattered. In the event of breaking, it is held in place by an interlayer, typically of polyvinyl butyral (PVB), between its two or more layers of glass. The interlayer keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. This produces a characteristic "spider web" cracking pattern when the impact is not enough to completely pierce the glass.
What is solar factor?
Solar factor is representing the solar heat gain through the glass relative to the incident solar radiation
What is U-value?
It’s a property of glass insulation and particularly for Low E glass.
The overall coefficient of heat flow which is measured in Watts/m2.k or in BTU/hr.ft2.f.
Calculated using boundary conditions and algorithms that are specific for climates in Europe (EN673)
or North America (NFRC) which give different values for the same IG configuration.
What is Low-E Glass?
Low-E coatings glass have been developed to minimize the amount of ultraviolet and infrared light that can pass through glass without compromising the amount of visible light that is transmitted, with difference in temperature inside and outside.
What is high performance glass?
A glass which is giving the efficiency of the solar control glass and the Low-E glass in one type of glass
What is the difference between laminated glass & toughened glass and which should I use?
There are two types of safety glass (toughened & laminated). The difference between them are:
||During the manufacturing process, tempered glass is heated to over 1,100 degrees. It’s then shot with cold air, which forces the glass to cool very
||rapidly. That process causes the outer surface to become much harder than the inner material. As a result, tempered glass shatters into very tiny fragments with rounded edges when it is broken
||Laminated glass consists of two sheets of glass that are bonded together by a plastic inner layer known as polyvinyl butyral.
||The inner layer softens the blow when anything hits the glass outer surface and prevents the glass from separating. That, in turn, reduces the chances of accident or injuries.
what is a double glass and what is its role in insulation?
Double glass is defining as two layers of glass with the same thickness connected to each other through a spacer tight together by using silicon. As much as the gap between the two layers get bigger (up to 16 MM), the temperature insulation improves.
A gap of larger than 16 MM provides better acoustic insulation only.
What is a shading coefficient (SC) ?
It Is the ratio of the total amount of solar radiation that passes through any specified glazing, relative to 3mm clear glass under the same design conditions, includes both the solar energy directly transmitted in addition to the absorbed solar energy that is re-radiated and convicted.
it is calculated using the NFRC methodology
What is the relative heat gain coefficient (RHGC)?
Relative Heat Gain refers to the solar heat gain relative to the heat transfer due to the indoor/outdoor temperature difference.
What is a curtain wall?
Curtain Wall is a form of a vertical building enclosure that supports no load more than its own weight and the environmental forces which is subjected to.
What is a structural glazing façade?
Structural glass is a glass which has gone through a manufacturing process to enable it to be used for structural elements of buildings. The resulting product enables walls, floors and ceilings in buildings to be transparent and can even be load bearing. Structural glazing is made by heating sheets of glass uniformly after manufacture, and then cooling them rapidly by jets of air. The outer layers closest to the jets of air cool and solidify first; they contract as they cool. As the inner layers try to follow, they put the outer layers into a compression mode. This process creates a glass that is almost 7 times stronger than the ordinary untreated float glass
What is the meaning of LEED?
Leadership in Energy and Environmental Design, or LEED, is a building certification process developed by the U.S. Green Building Council (USGBC), a non-profit organization (not a government agency) headquartered in Washington, D.C
What is cradle to cradle certificate?
The Cradle to Cradle CertifiedTM Products Standard is a multi-attribute, continuous improvement methodology that evaluates products across five categories of human and environmental health. It is administered by the Cradle to Cradle Products Innovation InstituteSM. Product certification is awarded at five levels (Basic, Bronze, Silver, Gold, Platinum), with the expectation that an applicant will optimize each aspect of their product over time. The ultimate goal is to encourage innovation and the design of products that effectively and positively impact people and the environment.
How much can glass contribute to green building?
Glass is a wonder material that combines more than a few advantages such as Transparency, Natural Day-lighting, Blending of Exteriors with Interiors and Acoustic control. Glass, a wholly recyclable material, supplies unrestricted occasions for architects as well as designers for the innovative applications in buildings. Glass plays a noteworthy role in accomplishing greater indoor environmental quality and energy efficiency and in so doing fulfills numerous criteria for green buildings.