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Solar gain through windows includes energy transmitted directly through the glass and energy absorbed by the glass and frame and then re-radiated into the space.Solar gain is illustrated by the snow on the roof of this house: sunlight has melted all of the snow, except for the area that is shaded by the chimney to the right.
Solar gain (also known as solar heat gain or passive solar gain) is the increase in thermal energy of a space, object or structure as it absorbs incident solar radiation. The amount of solar gain a space experiences is a function of the total incident solar irradiance and of the ability of any intervening material to transmit or resist the radiation.
Objects struck by sunlight absorb its visible and short-wave infrared components, increase in temperature, and then re-radiate that heat at longer infrared wavelengths. Though transparent building materials such as glass allow visible light to pass through almost unimpeded, once that light is converted to long-wave infrared radiation by materials indoors, it is unable to escape back through the window since glass is opaque to those longer wavelengths. The trapped heat thus causes solar gain via a phenomenon known as the greenhouse effect. In buildings, excessive solar gain can lead to overheating within a space, but it can also be used as a passive heating strategy when heat is desired.[1]
^Frota, Anesia Barros (1999). Manual de conforto termico. Sueli Ramos Schiffer (3rd ed.). Sao Paulo: Studio Nobel. ISBN 85-85445-39-4. OCLC 46753712.
Solargain (also known as solar heat gain or passive solargain) is the increase in thermal energy of a space, object or structure as it absorbs incident...
enhance solar energy collection, storage, and use, and reduce undesirable heat transfer. Passive solar technologies include direct and indirect solargain for...
there will usually be an opportunity to take advantage of the passive solargain by having more glazing on either the front or the back of the building...
either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. Active solar techniques include...
window) in a building. It is the ratio of solargain (due to direct sunlight) passing through a glass unit to the solar energy which passes through 3mm Clear...
position of the Sun is a major factor in the heat gain of buildings and in the performance of solar energy systems. Accurate location-specific knowledge...
used very little to no energy. These designs often utilized expansive solar-gain windows, which used the sun as a heat source. However, superinsulation...
significantly reduce the solargain of the IGU, which impacts both the thermal performance (R-value) and the Solar Heat Gain Coefficient (SHGC). Two types...
low thermal transmittance of having four or more glazing layers enables solargain to be adequately managed directly by the window glazing itself. In Nordic...
taken to ensure the building loads are not excessively increased due to solargain. The intent of a green building design is to curtail the demand on non-renewable...
(equal to 0.8 W/m2/K) Solar heat gain coefficient (SHGC), ratio of solar heat (infrared) passing through the glass to incident solar heat Visible transmittance...
conditioning include passive cooling, passive solar cooling, natural ventilation, operating shades to reduce solargain, using trees, architectural shades, windows...
solar wind source. Once solar wind plasma and particles gain access to the magnetosphere, they predominantly precipitate to the surface, where solar wind...
Solar water heating (SWH) is heating water by sunlight, using a solar thermal collector. A variety of configurations are available at varying cost to...
control solar penetration as a form of passive solar building design; the eaves overhang can be designed to adjust the building's solargain to suit the...
Trombe wall is a passive solar building design strategy that adopts the concept of indirect-gain, where sunlight first strikes a solar energy collection surface...
electronically and blocks direct sunlight which would not only cause large solargain, but dazzle those below. Construction work was finished in 1999 and the...
heat. The structure makes use of natural resources, maximising passive solargain for heat and using natural ventilation through its double-skin façade...
electronically and blocks direct sunlight which, would not only cause large solargain, but also dazzle those below. The futuristic and transparent design of...
designs also requires the use of solar shading, by means of awnings, blinds or shutters, to relieve the solar heat gain in summer and to reduce the need...
externally to improve efficiency and decrease solargain, whilst the east and west faces incorporate extensive solar shading. There is a southern entrance in...
A solar cell or photovoltaic cell (PV cell) is an electronic device that converts the energy of light directly into electricity by means of the photovoltaic...
is ideally placed within a building where it is shielded from direct solargain but exposed to the building occupants. It is therefore most commonly associated...
asterism Yingshi just after the winter solstice—this sited the homes for solargain. During the Zhou era, Yingshi was known as Ding and it was used to indicate...
an overhang effect that helps prevent interior overheating by reducing solargain, and may also have benefits in terms of blocking noise and improving natural...
wood, and mud. Thermal or solar heating and cooling: Earthships heat and cool themselves using thermal mass and solargain. They do not use electricity...
lighting generally not required, except at dawn and dusk – but glare and solargain may cause problems Daylighting Right to light Climate based daylight modelling...
The solar wind is a stream of charged particles released from the Sun's outermost atmospheric layer, the corona. This plasma mostly consists of electrons...
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