Abstract: The purpose of the exterior design of modern super-grade office buildings is to enhance the cultural taste of office buildings, beautify the urban environment, and to present the image of a prosperous city and a beautiful and comfortable office environment. Its exterior wall lighting uses a variety of modern lighting techniques and art forms to create a new, comfortable and unique architectural night view.
Keywords: office building lighting is simple and comfortable
With the continuous development of urban construction in China, the people's economic, cultural and material living standards have rapidly increased, and urban night lighting has flourished and has become an important part of urban construction. The value of light for a building is as important as an image. The performance of modern architecture, lighting environment occupies a very significant significance, so the concept that lighting is the soul of the building is increasingly recognized, and the lighting design has been placed in the architectural design, the overall planning of the macro perspective to allow. The commercial city gives the impression of being busy and modern, and the nighttime urban landscape continues to give the city a night of life through lighting design. The nightscape life of the urban buildings is the overall landscape lighting design of the building. The different lighting design techniques are used to express the beautiful structure and appearance of the building; it reflects the combination of modern building structural mechanics and aesthetics. The real night lighting design is a discipline that goes beyond the pure lighting function and enters the field of lighting environment art. Based on this design idea, we use the fourth element of the space of lighting to upgrade the “night scene lighting†to “the night scene beautificationâ€, and make full use of various modern lighting art forms and control technologies to create new architectural night scenes. landscape.
In recent years, the Guangzhou Municipal Government has invested billions of dollars in renovating the Pearl River and its cross-strait environment in order to shape the landscape on both sides of the Pearl River into a symbol of Guangzhou's new image. With the collection of light, color and shadow, the new dynamic lighting show is dressed up on both sides of the Pearl River in the evening, and it is presented in front of people with a new attitude. The exterior wall lighting of the two sides of the Pearl River changes with the dynamic rhythm, and the color lasers blend together to form a virtual light and space. The bright light makes it a veritable pearl of the water, and its colorful and bustling scene will be comparable to the "light show" of Victoria Harbour in Hong Kong. Of course, in this wonderful night view of the Pearl River, a number of nightscape projects are the result of our rainbow rain lighting.
And we will introduce the night lighting of the buildings that are not located on both sides of the Pearl River. It is not a colorful and dynamic “show†light, but an office building with the theme of “simple and generousâ€. Light lighting" project. Nowadays, perhaps you are a synonym for the bustling night scenes of the city, but when you are confused by these dazzling colors, movements and strong glare, when your visual nerves become tired, if there is one A kind of elegant, generous, simple building exterior lighting appears in front of your eyes, I think you will be very refreshed and very impressed. So the following is the whole process of expressing this impression to you.
I. Project Overview
Tianhe City East Tower is located in the popular center and economic center of Tianhe District. It is located in the northeast corner of the famous large shopping center Tianhe City Square. It is on the new central axis of Guangzhou, and the north side is adjacent to Guangzhou Tianhe Sports Center. The university district, high-end residential area, and Guangzhou East Railway Station are located at the intersection of Guangzhou Metro Line 1, Line 3 and Airport Express. It is the hub of the Tianhe Transportation Center and the pearl of the CBD Center. The geographical position is superior and belongs to the landmark area of ​​Guangzhou. The building is designed by Hong Kong Bemadan International and Guangzhou Design Institute. The building has 1,000 parking spaces and a helipad on the roof. The building has a total area of ​​103,000 square meters and a height of 197 meters. The floor area of ​​each floor is 2270 square meters. The energy-saving LOW-E coated hollow environmental protection glass is combined with the fluorocarbon coating aluminum line to form the curtain wall. The latest energy-saving VAV air-conditioning system is installed, and the 5A intelligentization is realized, and the communication, security and fire prevention systems are complete. There are 22 vertical passenger elevators in the building. The elevators are not more than 30 seconds long. The office buildings and shopping centers are diverted separately, but they can share resources without interference. Let you reflect the extraordinary charm of the international super-class intelligent office building.
Second, project planning
Guangzhou Tianhe City East Tower is developed in the form of super-grade office building and has a superior geographical position. The exterior wall of the building is mainly composed of aluminum frame and glass curtain wall. Based on the above characteristics, we integrate the Tianhe East Tower and the surrounding environment in the lighting design. Considering that from the needs of the light environment and the aesthetic sense, the function and the beauty are combined. At the same time, we notice the coordination between the lighting design and the architectural shape, and do not affect the daytime landscape and light pollution of the building. The idea is perfectly integrated into the design concept of the building. The light reflects the high-end and luxury of the East Tower of Guangzhou Tianhe City, and it also fully expresses the soul of the modern super-grade office building.
In fact, at the beginning, we also prepared two sets of schemes. The other scheme is a scheme of LED outline lighting. It uses a freehand approach to outline the facade of the building, which can express the dynamic and color changes of the building, but then consider the exterior wall of the building. The top-loading lights may affect the daytime landscape of the building and the difficulty in maintaining the lamps. After communicating with the owners and architects, they have abandoned the lighting scheme of the LEDs and adopted the lighting scheme for the first-level poles.
Third, the design description
1. Design basis:
1) Guangzhou City Construction Master Plan;
2) Guangzhou city night lighting overall plan;
3) Guangzhou City Appearance and Environmental Engineering Regulations;
4) According to the drawings, data and design requirements of the technical documents of the owner's bidding;
5) GB50034-2004 "Architectural Lighting Design Standards", implemented on December 1, 2004;
6) JG/T3050-1998 "Insulated electrical bushings and fittings for construction";
7) Based on the principles of energy saving, environmental protection, green lighting, application, safety and aesthetics;
8) Based on the principle of persisting in innovation, actively applying high technology, and scientific management;
2, design techniques:
A. It mainly adopts the vertical pole projection lighting mode, which mainly displays the architectural structure by lighting. The 2000W metal halide floodlight is installed on the poles around the first floor of the building, and the aluminum frame of the exterior wall of the building is illuminated by the beam from bottom to top. The bottom surface and the front side highlight the aluminum lines on the glass curtain wall, and the silver aluminum is reflected on the glass to create a crystal clear effect.
B. At the top 43 floors of the building, due to the indentation of the floating platform, shadows are generated. Therefore, a 400W metal halide floodlight is installed on the floating platform to fill the light, so that the illumination of the whole facade is uniform, so that the building is surrounded by the messy lights. Stand out from the crowd, highlighting the towering architecture and the modern architecture.
C. Due to the large flow of people at the entrance and exit of the building, in order to highlight the position and improve the illumination, a 150W metal halide ceiling type downlight is installed on the floating table above the gate to increase the brightness at the entrance.
D. Since the top of the building is a helicopter landing site, according to the relevant standards, regulations and recommendations for setting up aviation obstacle lights in the Civil Aviation Law of the People's Republic of China, the installation of white light high-intensity stroboscopic obstacle lights plays a dual role of function and decoration. (Not detailed here)
E. The green belt at the bottom of the building and the sidewalk ladder are equipped with a beautiful 150W metal halide light garden lamp, which is mainly used to illuminate the surrounding pedestrian roads and steps to function as a functional lighting. In general, through the combination of point and line and surface, the completeness, unity and coordination of the night scene of the whole light is highlighted. As night falls, the building will glow in the most beautiful posture in our elaborate lighting, and become a part of the night of Guangzhou city heart. beautiful scenery.
3, light color selection: Due to the functional characteristics of the office building, the light color of the external wall floodlighting adopts two kinds of light colors, yellow and white, and avoids the use of colored light and a large number of dynamic color changes. For this reason, we are based on the construction of Tianhe City. The exterior wall material, and the modernity and uprightness of the office building, the 5000K white light with high color rendering (close to the daylight color temperature at noon) is used to restore the original color of the building material.
4, lamps and light source selection: the principle of our choice of lamps is to meet the design of the light distribution requirements, the beautiful appearance of the lamps and the construction of the appearance of materials and coordination, the brand and quality and safety are the primary reference, because this is the impact To the project's quality and the most critical elements for future maintenance, the project uses a total of 60 sets of 2000W metal halide medium-narrow light projectors, 32 sets of 400W medium-light projectors and 15 sets of 150W gold halogen garden lights and 42 sets of 150W metal halides. Light ceiling light (pictured below, product picture and product features)
　　 5, lamp installation and circuit layout: At the beginning we designed the pole height of 2.5 meters and is a double pole, but later considered the position of the pole in the square of the Tianhe City Commercial City, if the pole is too short, it is easy to cause vision The crowded on it is not enough atmosphere, and the double-bar area is large. Finally, through the calculation of load, wind and earthquake resistance of the opposite pole, and to achieve better aesthetic visual effect, it is finally determined to be 4 meters high. Rod, 3 lamps per pole. The pole spacing is 12 meters. In order to ensure the projection angle effect, the distance between the pole and the exterior wall of the building is 8 to 9 meters. In addition, one side of the building is close to the original shopping mall. We install it on the sky surface of the shopping mall. In order not to damage the waterproof layer of the sky surface, we use prefabricated concrete piers. Fixed (relatively strong and better position and angle). When the wire is piped, it is also fixed by setting up a cement pier.
　　 6. Illumination calculation: Illumination calculation is a necessary means of lighting design, and the result is directly reflected in the later lighting effect. Now there are many illumination calculation software in the industry, but all calculation methods can not leave these elements, otherwise the calculation result is Inaccurate, must be based on the number of lamps selected, power, light source, luminaire reflector (light distribution curve), installation position of the luminaire (vertical and horizontal distance from the object) and projection angle; and the surface material of the object to be illuminated , gloss and color. To this end, we must combine the location of the first floor of the building, not only to achieve good lighting effects, but also to affect the landscape, passage and fire of the square, and to achieve the best illumination with the minimum total power. Carefully designed, the calculated average illumination: 128 Lux; maximum illumination: 250 Lux; top minimum illumination is 16 Lux. (The left is the illuminance map of the 3D simulation of the building facade test); this data is also the comparison data of Party A's acceptance of the project after we complete the project. At the end, although the average illuminance value in Party A's field measurement acceptance data is slightly higher. And we are happy that the uniformity of the illumination is much better than the calculation.
　　 7, lighting control method: the use of intelligent control of lighting methods. It is supplemented by automatic and manual control, and implements control methods for major festivals, normal and late-night different time periods; the entire lighting system can be adjusted to the lamps of each circuit according to different illumination environmental conditions through intelligent modules and programmable control panels. Light; summary has the following advantages:
1. Intelligent lighting control, using low-voltage secondary small-signal control, strong control function, multiple modes, wide range, high degree of automation, by implementing the preset and memory functions of the scene, you only need to press one key on the control panel during operation. A lighting scene can be activated (different light and dark of each lighting circuit to form a lighting effect), and each lighting circuit will automatically change to the corresponding state.
2, intelligent lighting control system uses "dimming module", through the dimming of lights in different use occasions and different time periods to produce different light illuminance effects, creating a different comfortable atmosphere.
3, intelligent control system can achieve energy management automation, through a distributed network, only one computer can achieve the management of the entire building.
4. Intelligent lighting system reduces the unnecessary power consumption due to the use of automatic lighting control means. At the same time, it also reduces the considerable operation and maintenance costs. The intelligent lighting control system can save 20%-50% more than traditional switch control. .
5, intelligent lighting control system, the power supply on the lighting fixture can be controlled and adjusted by the dimming module, so the power quality is high, can avoid the grid surge voltage and surge voltage, in addition, due to the introduction of soft start and soft shutdown technology Can extend the life of the lamp by 2-4 times.
6. The intelligent lighting system is connected by the module, and the control panel and the module are connected by data lines, which greatly reduces the traditional wiring expenses. At the same time, the high-power modules are equipped with overload protection switches, which can completely replace the traditional lighting cabinets. There is no need to add extra expenses. Through the intelligent lighting control system will create a beautiful, energy-saving, green, environmentally friendly lighting project.
1), the requirements for the protection level of lamps, control boxes, distribution boxes, etc. (light protection level IP65 or above);
2) Do a good grounding system for poles and lamps, and use reasonable fault protection electrical devices;
3) Protect the poles and lamps from installation, wind and earthquake resistance;
4) Do lightning protection, connect the top lighting of the building with the lightning protection belt of the building, and configure the lightning arrester device for the electric box;
5) The wall and floor of the wall and floor of the equipment room, the basement and the fire zone shall be sealed with fireproof and waterproof materials (for details, see National Standard Atlas 90SD180).
6) Establish a sound safety system for lighting system equipment, establish and implement a safety management system for lighting system equipment, which is the most fundamental means to ensure safety.
1), correctly determine the lighting standards of the building's external walls, (related to the illumination, brightness, uniformity, maximum power density value of the night scene lighting and the maximum photometric indicators limiting light pollution).
2) Select the best pole position and the appropriate pole spacing.
3), choose the best lighting equipment; the best light source, the best lighting, the best light source accessories;
4), the correct choice of lighting control methods: active use of night lighting supervision new technologies, such as centralized remote control remote viewing and management systems, dual three-level management control system. The whole adopts automatic control, such as the combination of light control, time control, program control or several control methods. The illuminance sensing control system is implemented to automatically adjust the intensity of the light according to different ambient light, thereby achieving an effective energy saving effect.
5. Strengthen lighting maintenance and management
1) Regularly perform lighting maintenance, and replace the non-flammable point light source or the light source with a large light decay.
2) Regularly clean the lamps to ensure a high luminous flux output.
3) Formulate or improve the management system and methods of night lighting, and strictly follow the management methods.
6, reasonable design of lighting power supply and distribution system.
1) The location of the distribution box should be as close as possible to the load center and close to the power supply side.
2) The load of each phase of the three-phase distribution mains should be balanced. The maximum load should not exceed 110% of the average value of the three-phase load. The minimum phase load should not be less than 90% of the average.
3) The lighting load should adopt three-phase power supply. When the load is very small, single-phase power supply can be used, and the line load current value should not exceed 30A.
4), lighting single-phase branch circuit should not exceed 16A, using high-power gas discharge lamps, should not exceed 30A.
5) The power factor of the lighting distribution trunk line should not be lower than 0.9; the gas discharge lamp should be equipped with a design compensation capacitor, and the power factor should not be lower than the standard value.
6) High-intensity gas discharge lamps with a power above 1000W should use a bulb with a voltage of 380V.
7), the branch line of the lighting distribution trunk line should use copper core insulated wire or cable.
8) The cross section of the copper core insulated wire for the lighting branch circuit should not be less than 2.5mm 2 .
9) The cross-sectional area of ​​the lighting distribution line shall meet the requirements of current carrying capacity and allowable voltage loss.
At the end: After the completion of the project, the building is illuminated by the light, and the building is shining in the most beautiful posture. The middle and lower parts are viewed from the bottom up. The aluminum strip of the building is illuminated by white light, as if it were a The Crystal Palace leads to the heavens in the world. From the near to the far side, the visual effect of the night of the architectural lights is also very good. It looks like a line outline, and the visual angle changes like the shiny stars on the outer wall. . Walking around the building, I saw pedestrians on the road raise their cameras, leaving the beautiful architectural lighting scene, and some of them took a photo with POSE. At this point, I suddenly felt particularly happy, because as the designer of the exterior wall lighting, I finally made a beautiful evening dress for the 197-meter guy, and at the same time added a wonderful night to the Guangzhou city. It also adds another masterpiece to our rainbow rain lighting.
Editor: China Lighting Network Liu Li
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