What are the types of shading devices?
According to , there are two classifications of shading devices namely fixed shading elements and adjustable/rectracable shading elements. Fixed shading devices categories are external form position, overhangs, vertical fins, horizontal and vertical combinations (egg-crate type ), and balcony.
What is solar shading device?
Introduction Sun Shading Devices are any mechanical equipment or textiles that are used either internally or externally or in between the internal and the external building space. The primary objective of creating a comfortable internal environment, that is, cool in the summer and warm in the winter.
How is shading device calculated?
To calculate the depth (d) of the horizontal shading device , multiply the obtained ratio (d/h) by the needed shading height (h). To calculate the protrusion (p) of the horizontal shading device , multiply the obtained ratio (p/h) by the needed shading height (h) for the selected hours (cut-off times).
What is horizontal shading device?
Horizontal Devices : to shade a window during hot summer months, but to allow sunlight to shine through a window in the winter, to help warm a building. Vertical Devices : Primarily useful for east and west exposures to improve the insulation value of glass in winter months by acting as a windbreak.
How do you find a shadow angle?
Here’s how: Pick a vertical object that is easy for you to measure and that is relatively permanent, like a sign post or fence post. Measure it’s height. Right at noon on a bright sunny day, measure the length of it’s shadow on the ground. Take the vertical measurement and divide it by the shadow measurement.
How can we prevent solar radiation?
Need for Protection from Solar Radiation : Solar Screens are one option to significantly reduce or prevent solar heat gain and transference of solar radiation , depending on the screen thickness chosen. Solar screens filter and block the damaging UV Rays that cause color fading on floors, walls, artwork, and furniture.
How do you shade a south facing window?
South facing windows can be shaded with overhangs that will block the high summer sun, but allow the low winter sun to shine in and provide passive solar heating when its wanted. Overhangs do not work for east or west facing windows , since the sun is low in the sky when shining on the east and faces of the house.
How do light shelves work?
A light shelf is a passive architectural device used to reflect natural daylight into a building. ‘Bouncing’ sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in.
Why is the angle of the sun important in efforts to increase or minimize solar heat gain?
Its energy is spread over a larger area, the same area as A’s plus the area enclosed by the dashed lines. The result of spreading the same energy out over a larger area is to reduce the intensity . Lower intensity input results in less heating . Figure 4.10 Sun angle determines the intensity of energy .
What is a shadow angle?
The horizontal shadow angle (HSA) is relevant for vertical shading devices such as fins. It is easy to determine: It’s the angle between the normal of the window pane and the azimuth of the sun.
How do you find the angle of a sunshade?
Calculating sun angles The angle of the sun in the sky at noon can be easily calculated for the solstices and equinoxes as follows: Equinox = 90° — latitude. Summer solstice = Equinox + 23.5° Winter solstice = Equinox — 23.5°
What is overheated period?
The term ‘ overheating ‘ refers to discomfort to occupants caused by the accumulation of warmth within a building. It is considered to be a growing problem in the UK due to climate change, the urban heat island effect, electronic equipment, increasing amounts of glazing and so on.
How can we protect our buildings from the sun?
During cooling seasons, external window shading is an excellent way to prevent unwanted solar heat gain from entering a conditioned space. Shading can be provided by natural landscaping or by building elements such as awnings, overhangs, and trellises.
How do you shade a sun window?
5 Energy-Efficient and Stylish Ways to Shade Your Windows Horizontal Louvers and Jalousies. Horizontal louvers and jalousies are some of the most common ways to shield a building and its openings from direct sunlight . Vertical Baffles. Awnings and Brise-Soleils. Fritted and Frosted Glass. Screens and Exterior Shutters.