The importance of natural lighting in buildings
2020-08-03 14:57:56

Abstract: Edison invented the light bulb and opened the era of human use of artificial lighting on a large scale. With the development of the times, more and more people are used to working and living under the light. In the design and construction of modern architecture, people pay more attention to the use of artificial light sources, but often ignore the natural light. Paying attention to natural lighting is not only to make people who live in it more close to nature, but also an important way to achieve sustainable buildings from the perspective of energy and health.

Keywords: building, sunlight, natural lighting, energy consumption, illumination, illumination


First, the characteristics of sunlight

1 The advantages of sunlight

First of all, as the natural light source of sunlight, the amount of light is extremely large, which is by far no light source at all. The second solar light, which is a natural light source, can be said to be inexhaustible and inexhaustible in the time range of billions of years. There is no need to "mining" at any cost. This is unmatched by any artificial light source powered by electrical energy, chemical energy, and bio-energy. Third, the short-wave light in the solar spectrum, such as ultraviolet light, can be sterilized and can also prevent rickets. Fourth, natural lighting is extremely simple to implement, no need to lay lines, no equipment, and no complicated technology. It can be said that when you see the sun, you can carry out natural lighting. Sixth, in general, people can obtain the "view" of the heart while enjoying natural light. Seventh, the sun contains a lot of heat energy. Although the technology of transforming and storing these heat energy is still very primitive, it is foreseeable that this technology will develop very quickly.

2 Sunlight can meet people's psychological needs

Electric lighting can meet the needs of human lighting, but can not meet the psychological needs of people. Sunlight is an inexhaustible source of light, and the sun is changing all the time, transmitting the changing colors of the sky, the layers of light and the climate to the surfaces and forms it illuminates. During the daytime, the sun shines as indoor lighting, enters the room through the window on the wall, and falls on the surface of the room, which makes the color brighter and the texture clear. The change in the pattern of light and light produced by the sunlight makes the space of the room active, clearly and clearly expressing the shape of the room. Light and shadow, it has a touch-up effect on the decoration of the furniture, so that the interior is full of artistic charm and life. The history of daylighting is as old as the building itself, but with the advent of convenient and efficient electric lights, daylight is gradually overlooked. Until recently, people have re-examined their irrational behavior of pursuing material enjoyment and over-consumption of the earth's natural resources.

3 sunlight has some unique physical properties

Too much light has some physical properties, such as volatility, particleiness, radiance, natural light color, ability to show texture, and dynamic changes. Based on these characteristics, natural light has a unique expressive power that is unmatched by other light sources. Natural light is incident on the indoor space through the window glass. Because the texture of light and the texture of transparent glass are similar, it can give people a pure feeling of natural light. Natural light also has the characteristics of transmission, reflection, refraction, and diffusion. Applying these characteristics to the design of light environment can make light produce rich expression in indoor space, giving people the ability to open, condense, light, and contain energy. In addition, the natural light also has directionality. This not only enhances the visibility of people and objects in the indoor space, but also changes the scale and proportion of the indoor space. It also produces light and shadow effects, creating a three-dimensional sense of people and objects. The use of natural light to create environmental art is very attractive. It can be said that this is the main reason why modern architecture prefers natural light. Natural daylighting is to introduce sunlight into the interior of the building and distribute it in a certain way to provide more than artificial light. Ideal and better quality lighting. Natural lighting can change the intensity, color and vision of light. It not only reduces the electricity used for lighting, but also creates a dynamic indoor environment that creates a healthier and more exciting working environment than artificial lighting systems. It is good for the physical and physical health of indoor people. However, if it is not designed properly, it will affect the visual effect and cause discomfort, and it will also increase energy consumption. However, as a natural light, from the perspective of architectural lighting, it has its enormous incomparable advantages.

Natural lighting.

Second, the benefits of natural lighting in the building

1 Natural lighting can improve work efficiency

Although natural daylighting has great potential for saving energy and preventing environmental pollution, it is more important for its impact on indoors. The building was built for people. Foreign surveys show that a staff member’s electricity cost per year is only comparable to his one-hour salary. Therefore, the economics of natural lighting are mainly reflected in promoting productivity, improving work efficiency and increasing attendance. These provide a strong guarantee for the initial investment recovery of natural daylighting systems. The so-called green buildings that are currently of concern include how to link natural lighting with healthy buildings and indoor environmental quality. The staff likes to have larger windows in the office and better lighting because it can increase productivity. It is precisely because of the influence of natural light on human aesthetics, vision and photobiology that people's demand for natural light is everywhere.

2 rich indoor light environment

From an aesthetic point of view, natural light creates a natural environment that artificial lighting cannot create, and more importantly, indoors can enjoy the beauty of the outdoors. Through the window, the staff can obtain visual information of the outdoor weather, time and surrounding environment, and relax the nerves and comfort after the intense work. Natural light is a dynamically changing light in nature. It consists of scattered light, reflected light, and refracted light. Its intensity, direction, and spectrum change with time and weather. A good natural lighting design should be able to take advantage of these changes. The property creates a good lighting effect and enriches the indoor light environment. Although people have a better understanding of the visual effects of natural light, there are few studies on its biological effects and effects on the human non-visual system. These effects are important for studying natural lighting and promotion.

3 Natural lighting makes people's body and mind healthier

The relationship between productivity and productivity is very helpful. In 1999, there was a correlation study on natural light and sales. The results show that natural light provides a good consumption environment, and sales can be increased by 40%. The shopping malls in the study not only have natural lighting, but also high floors. Natural lighting may not be the only factor affecting sales, but it is definitely a very important factor. The Lighting Research Center has recently proposed a hypothesis of physiological principles that explains why natural daylighting can improve work efficiency. Experiments have shown that natural light can inhibit the production of melatonin in the human body. The study of the biological clock and the physiological cycle Rea et al. also proves that at standard office illumination levels, the wavelength of the light wave is short (up to about SOn0m), the energy is high, and the melatonin is more effectively inhibited. Therefore, natural light provides suitable light. The environment stimulates the physiological cycle system of the human body, so that the physiological cycle of the human body is synchronized with the outdoor illumination level. During the daytime, the outdoor illumination is high, the light is good, the person is very awake; the evening illumination is low, and accordingly, the person is very sleepy, so the changes in the natural light intensity and duration of the sleep may cause physical discomfort and mood swings, such as seasonal emotions. Disorders are caused by melanin lag in the daytime. In a building without natural light, from a biological point of view, people may still be in the dark, so the theory of mental state is poor and work efficiency is low. The main ones are that they analyze and compare the staff who work in the same kind of work, and the different performances in windowed buildings and windowless buildings, and draw different conclusions. Of course, natural lighting design should try to avoid some negative effects on the human body such as reducing solar radiation. Get hot, avoid glare, avoid conflicts with sound and light equipment, and ensure personal privacy.

4 Natural lighting is conducive to energy saving

The use of artificial light often consumes a lot of energy. This aspect will increase the cost of buildings and their maintenance. On the other hand, it will accelerate resource consumption and increase environmental pollution. Therefore, China is a country with a large population and relatively scarce resources. From the perspective of energy saving, cost and environmental protection, natural lighting is also very necessary.

Third, the new technology and advantages of natural lighting

1 new technology application

Light guide tube method: The light collected by the solar concentrator is transmitted to a place where light is needed indoors. Optical fiber method: Optical fiber, also known as light guiding fiber, is a fiber that closes light energy in the fiber to produce light guiding effect. It can transmit signals such as changes in light from one end to the other. Lighting shelf: In a sense, the lighting shelf is a horizontally placed light pipe, which is mainly designed to solve the lighting inside the room. Prism group multiple reflection method: a set of light-transmitting prisms are used to transmit the sunlight collected by the light collector to the part where light is needed. Reflective high window: The reflective high window is simple in structure because it has no complicated light collecting means and light guiding means, but a set of specular reflecting means is mounted on the top of the window.

2 advantages of new technology

The lighting surface is increased, and a large amount of natural light is introduced into the room, which improves the lighting effect and a large amount of light enters the room from the side. Brings plenty of sunshine and moving light and shadow. Moreover, the energy is clean, the lighting efficiency is increased, the sunlight is controllable, and the requirements of the people can be met as needed.

Four summary:

The introduction of natural light will greatly improve the energy efficiency of the building, and in addition, it will also increase the effective use of the building. I think this will be very attractive for the current housing problem.

Related information

Suzhou sunaite Energy Saving Technology Co., Ltd. address: building A1, No. 192 Tinglan lane, Suzhou Industrial Park, Jiangsu Province, main products: light guide lighting system light guide lighting system light guide tube lighting system light guide tube light guide tube light guide tube