in English means daylight. In practice, this concept means the mutual placement of windows, translucent or reflecting structures in such a way that during the day it is natural light that provides room lighting. Today, this technology is increasingly used in the design of the building, because the presence of dailighting will make the work more comfortable and save energy. It is possible to use photocells, which include and regulate artificial light in low light conditions. Debunking the myths about dailing, we’ll do it.
Dailighting is very expensive.
It is believed that the introduction of the building elements of the daylighting significantly increases the cost of construction. In fact, with the use of an integrated project approach, construction costs do not increase. This is achieved by taking into account the impact of lighting on air conditioning systems. The fact is that in the course of electric lighting a lot of heat is released, whereas in natural light this does not happen. A lower degree of heating of air during dailighting allows the use of more compact air cooling systems. Thus, the money saved and launched for the introduction of dailighting.
Dailighting is very complicated.
In fact, you do not have to invent anything. There is a special program Daylighting Collaborative, which allows you to design a daylighting that will work successfully in most commercial, educational and social institutions. It remains only to copy the approved projects. At the heart of affordable technology lie the years of operation and design of the dalating. As a result, no significant investment in design is required, labor and time are saved.
Dailighting lets the summer heat into the house.
For lightning, the light-thermal ratio is much better than for electric lamps. Properly designed dailighting provides 99% of the sunlight, providing 50 foot-light illumination. This is quite enough to solve almost any problem.
Dailighting causes the effect of blinding.
This happens when the room gets a surplus of light, by the way, this is the case in most office spaces with traditional lighting. Dailighting is good, that allows you to think about the location of windows, the presence of shading devices and devices, use a glass with a low transmittance, which significantly reduces the brightness of sunlight and blocks direct rays.
It will be much more useful to make investments in the improvement of heat supply, lighting, ventilation and air conditioning systems.
If there is a desire to save, it is better to reduce the need for electric lighting and cooling, which allows you to do cool-dailighting. The use of natural light leads to the fact that less electricity is required, only night lighting remains. Hence, there is a reduction in heat, a decrease in the amount of heat that must be removed by air conditioning, which will also result in a reduction in energy costs. Naturally, something will be spent on cooling and lighting, but these tasks can and should be solved using the most efficient equipment. Efficiency will be to consume the least amount of energy.
In buildings that use dail-out glass, they should be kept clean at all times.
In fact, absolutely clean windows just let in too much light, which is inappropriate for effective illumination. The sun’s rays give an illumination of about 7-10 thousand foot-candles, and for workplaces, only 50 foot-candles will suffice. A large number of light gives the effect of blinding, as well as the effect of the cave in which the rear wall will be darker than the rest. To neutralize the contrast that arises, people usually shade and turn on the light. So with a well-planned dailight, even shading can be treated with natural light, without resorting to the help of an upper artificial one.
Dailighting and skylighting are essentially the same thing.
The use of roof or skylights (which is skylighting) can really be a good solution in cases where the premises are very isolated. But, as practice showed, in most schools and offices, dailighting can give light even more than necessary. Just need to place the windows correctly and choose their size. Rooftop windows are not always needed, they are used in cases where the length of the glazing is more than 8 meters.
Daylighting can only be used on sunny days.
Let’s look at the language of figures. Overcast sky provides illumination in 5-6 thousand futosvechey, which is 100 times more than necessary. And for the northern latitudes it is the cloudy sky that to some extent is the best source of illumination, since uniform and diffuse light is formed. This, by the way, is known to photographers. In the southern countries, however, the amount of natural light is a catalyst for the development of daylighting, but one should not abuse it, but should be carefully managed.
Daylight in a room can only get in one correct way.
Dailighting has several methods that are chosen taking into account the location of the building, its orientation relative to the terrain, the number of floors, the level of computerization, and so on. Dailighting involves a different approach to offices, schools, warehouses or government agencies.
Buildings built on the basis of dailighting, consist of a single glass.
If the building is completely made up of glass, then a good daylayting will not work. The fact is that such designs are overheating and generate too bright light. In effective dailight buildings, windows occupy only 25-40% of the wall area, which is roughly comparable to conventional buildings. A feature of the dailight is the correct placement of windows and the structural and technical features of their operation. These include the transmittance of visible light, the degree of solar heating. This is not directly related to the large number of glasses in the building.