Wal-Mart was founded in 1962 by the legendary American retailer Sam Walton in Arkansas. After more than 40 years of development, Wal-Mart has become the largest private employer in the United States and the world's largest chain retailer. At present, Wal-Mart has opened more than 7,000 stores around the world with more than 1.9 million employees in 14 countries around the world. There are 176 million visitors to Wal-Mart every week.
Wal-Mart entered China in 1996 and is headquartered in Shenzhen Shenguotou Plaza, with 15 floors and a total area of ​​60,000 square meters. In today's increasingly scarce energy, China's 11th Five-Year Plan clearly puts energy conservation and emission reduction in a very important position. How to effectively use energy, save energy and reduce the impact of energy consumption on the environment has become China, and even major enterprises and ordinary people. An imminent event.
According to the statistics of authoritative organizations, in all the energy consumption of the office, lighting accounts for 38%. It can be seen that lighting is actually the largest power consumption. Although efficient fluorescent lamps have been used in lighting, the biggest energy waste is still the office space. The light is still on when there is no need for illumination. In this lighting energy-saving renovation project of the Wal-Mart (Asia-Pacific) headquarters office building, Leviton provided comprehensive energy management solutions and related lighting control products to help Wal-Mart establish an automatic control system for daylight sensing systems and motion and static detection. Further energy savings. At the same time, it also provides interfaces that work in conjunction with other intelligent building control systems, such as HVAC and air conditioning systems, to achieve more energy efficiency, meet the specifications of energy-efficient buildings, and reserve ports for future expansion of the system.
Brief description of the plan
(1) Daylight collection area
During the project design and installation process, Leviton engineers found that since the working hours of the office area are almost all during the day, a large amount of natural light is irradiated through the glass curtain wall, so consider the artificial lighting of the office to complement the natural light, that is, saving Energy can also create a comfortable office environment. Leviton's daylight sensing technology compensates for the brightness of the surrounding environment by precisely adjusting the output illuminance of the room luminaires, thereby maintaining the brightness of the office area within a set range. The most common source of light is of course daylight. The most common system uses a light sensor to measure the surrounding brightness and then automatically dim it to a user-defined brightness range. By utilizing free natural light, daylight sensing can save up to 60 % on electricity bills.
Operating rules:
Measured light brightness = set brightness → light brightness remains unchanged
Measured light brightness
Measured light brightness > set brightness → turn off part of the lighting load to maintain the working plane illumination level