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If you are careful to drive around to IKEA, you will find a subtle change in the underground garage. The lights here have changed - replacing the fluorescent lamps with LEDs, and there is a photodetector in the middle of each tube. When the car enters the garage, a light tube will light up as the car moves. When you lock the door and leave, the light in the garage will only dim as you go.
And don't underestimate this subtle change, it can help the IKEA garage save 75 electricity per year (the lighting time of the IKEA underground parking lot is 9:00 am to 23 pm, the rest is the time to turn off the lights). A few days ago, the reporter interviewed Zhang Yusen, the general manager of Warwick Kaide Lighting Technology (Beijing) Co., Ltd., which helped IKEA to carry out garage lighting renovation.
Reporter: In addition to IKEA, what projects have you transformed? What is the energy saving effect?
Zhang Yusen: There are many public places and schools that have been remodeled. For example, the underground parking lot of the National Peking Opera Theatre was previously equipped with 40W fluorescent lamps. Later, all the LED intelligent lighting fixtures were modified. The current power saving rate has reached 80 or above. Because there are more than 10 hours at night, the vehicle is in and out less, and the lamps are in a dormant state, so the power saving effect is more obvious. In addition, some schools are usually large energy consumers. For example, Hebei University of Science and Technology has modified the parking lot of the school and two family homes earlier, and we have installed more than 400 sets of intelligent LED lights. The test data of the hanging meter shows that the power saving rate has reached 90.2, and the power saving effect is very obvious. After 2 years of use, the money for saving electricity has already exceeded the cost of purchasing lamps.
Reporter: Can you help us calculate this energy-saving account?
Zhang Yusen: Take the National Peking Opera Underground Car Park. The original lighting system uses a double-headed T8 fluorescent lamp 116ç›. In order to save energy, only 50 of them were put into use (ie, single-tube operation). In its energy-saving renovation project, we used a 116-inch pyroelectric infrared sensor and an intelligent controller to form an LED smart light to replace the original lamp position. The lamp stays dormant (3W) when there is no car, and automatically turns to full power (12W) when someone has a car. The existing lighting in this underground parking lot is 116 T T8 double-head fluorescent lamps, calculated by single head, the power of the light source is 36W, and after the ballast is about 40W, the total power is 40W116ç›/1000=4.64kW, 24 hours a day. Light up.
Therefore, before the transformation:
Annual electricity fee 4.64kW 24 hours 365 days 1 yuan / kWh = 40646 yuan;
Annual maintenance fee of 10 yuan / support {24:365 days / 3000 hours / support} 116 = 3387 yuan;
The total annual cost is 40,646 yuan + 3,387 yuan = 44,033 yuan;
The 3-year operating cost is 44,033 yuan / year, 3 years = 1,320,99 yuan.
Then, the renovation project shares a 116-inch LED smart light. The total power at full power is 12W116ç›/1000=1.39kW, and the total power in sleep state is 3W116ç›/1000=0.35kW. Because of its intelligent function, when no one is driving, the vehicle stays in a dormant state with low illumination. When someone has a car, it automatically switches to full power and high illumination. According to the actual calculation of the existing project site, the underground parking lot is in a dormant state for about 2/3 of the day. Therefore, after the transformation:
Daily dormant power consumption 0.35kW16h = 5.60kWh;
Daily full power state electricity 1.39kW8h=11.12kWh;
Annual electricity bill (5.60 11.12) kWh365 days 1 yuan / kWh = 6103 yuan;
The total annual cost is 6,103 yuan (the basic maintenance cost during the lifetime is 0);
The 3-year operating cost is 6103 yuan / year 3 years = 18309 yuan.
It can be seen that the LED intelligent light is used to greatly reduce the ineffective lighting under the condition of the same illumination and comfort, and the cost after the transformation is equivalent to 13.90 of the cost before the transformation.
Reporter: At present, the LED industry is developing very fast. LED lamps are mainly used as urban street lamps. Why did you choose to use the underground parking lot as a breakthrough for LED applications?
Zhang Yusen: The underground parking lot is a place that requires 24 hours of all-weather artificial light source illumination. Under the premise of meeting the illumination standard requirements, people's lighting comfort requirements are lower than general general lighting, and the frequency of activities of personnel or vehicles in such places. There are obvious time differences, so many lighting is ineffective. At the beginning, we thought that if LED intelligent control can be introduced, we should seek breakthroughs in the working mode of lighting fixtures, that is, to achieve people to light, people to turn dark, automatic dormancy, on-demand lighting, then the LED energy-saving advantages will be fully utilized.
The most important thing is that LEDs are easy to achieve intelligent control. Each lamp can be independently set up with infrared detector to realize self-management. The luminaire is designed to have two modes of constant brightness and sleep state, wherein sleep mode power consumption is only 2W (improved version) Products, 2W can meet the needs of safe lighting), which can greatly save energy and take into account the requirements of the TV monitoring system for the minimum ambient illumination, and get rid of the ills of turning on the lights and turning off the lights.
There is also a more critical data. As the number of underground parking lots in high-rise buildings, commercial centers and government institutions has expanded rapidly, and the grades are getting higher and higher, facilities are becoming more complex and energy consumption is increasing. In terms of lighting alone, its energy consumption accounts for about 80% of the energy consumption of underground parking lots. Taking an underground parking lot with 1000 lights as an example, the annual lighting energy consumption is as much as 350,000 kWh, and according to statistics, Among them, the ineffective lighting consumes about 2/3.
Reporter: At present, what is the status quo of underground parking lot lighting?
Zhang Yusen: The underground parking lot was once dominated by straight fluorescent lamps. Due to the lack of effective lighting energy-saving technical means and management ideas, this place has been in standard lighting and high energy consumption, reducing power consumption and dim environment, saving costs and property disputes. Many contradictions.
Under pressure from the economy, people have used a variety of methods, such as reducing the number of lighting fixtures installed (lighting acceptance is not up to standard), reducing the number of lights (insufficient illumination, poor uniformity, increased management costs), manual control of lighting time (increased Management costs) to achieve energy-saving purposes, but these are in exchange for the loss of lighting quality in exchange for electrical energy savings, the transformation effect is often unsatisfactory.
Reporter: What do you think are the main advantages of LED intelligent lighting in underground parking garages?
Zhang Yusen: First of all, the power saving rate is high. Through numerous cases, the introduction of LED intelligent lighting into the underground parking lot can achieve a power saving rate of about 80. This is mainly due to the obvious tidal phenomenon in the lighting demand of the underground parking lot, that is, the difference between the peak time and the low valley time is obvious. The traditional long-light mode is the energy-saving gold mine, which should provide different illumination brightness according to different time periods; The lighting itself is a green light source with low energy consumption, and its high efficiency will bring about the power saving rate at the facility level. In addition, the on-demand lighting power mode will also bring the power saving rate at the working system level.
Second, the transformation method is simple. At present, the mature LED intelligent lamp has fully considered the actual situation of the underground parking lot and the simplification of the reconstruction. The general electrician can complete the lamp replacement, and the user does not need to change the usage habits, nor increase the management cost of the user.
Reporter: At present, the price of LED smart lamps is often about 5 times higher than that of traditional lamps. Does this affect the promotion of its market?
Zhang Yusen: At present, due to the high price of LED lighting products, many users are difficult to accept in a short time. So seeking a better business model is necessary for future development.
Reporter: What are the current difficulties in marketing?
Zhang Yusen: The early publicity of LEDs in the industry has caused the public to expect too much, and LED technology and products are truly mature (represented by stability, reliability, standardization, interchangeability and economy). There is a certain way to go, which also hinders the enthusiasm of users to try. In addition, due to the dependence of the underground parking lot on the main building, the construction period is long and the operating entities are frequently changed. In terms of new construction projects, the construction, design, construction and operation parties are insufficiently aware of the investment and return of LED intelligent lighting projects, so it is difficult to make decisions; for the renovation project, the length of the contract period of the property department, the concept of the owner And the ability to pay will limit the decision-making of LED intelligent lighting projects; generally only the self-built projects and public facilities projects that benefit themselves will be easy to implement.
Reporter: So in the future, what direction should LED lighting be used in underground parking lots?
Zhang Yusen: First of all, improve product performance and reduce product prices. Improve product stability and reliability, and standardization. Second, the standard is formulated in a timely and reasonable manner. In the "GB50034-2004 Architectural Lighting Design Standards", there are illumination requirements for underground parking lot lighting, which is generally required to be 75 lux. However, most of the underground parking lots in operation are generally low. The operation of underground parking lot lighting has a de facto departure from the standard. This will be greatly improved if the concept of on-demand lighting is introduced into underground parking lots and is widely used. Then the relevant standards should be constantly adjusted. In the revision of the standard, it is possible to confirm the different needs of the above-mentioned public places lighting through scientific measurement of people's behavior patterns, so that the actual needs of people in the so-called lamp sleep state can be confirmed and quantified, and the on-demand lighting can be surpassed by individual projects. The limitations of practice, to achieve clear expression and scientific and reasonable index system, better guide the design, construction and operation of architectural lighting, making it more standardized, scientific and economic.
Reporter: Finally, do you predict the LED market in underground space?
Zhang Yusen: There is a set of public data to see. At present, Shanghai has developed and utilized an underground space of about 40 million square meters to form more than 10 underground cities. By 2020, Beijing will build 90 million square meters of underground space. , per capita 5 square meters. The underground space development projects such as underground shopping malls, underground passages and commercial streets planned and constructed in Guangzhou have reached more than 19 million square meters, equivalent to the area of ​​more than 60 Guangzhou Olympic Sports Centers. In addition to the above three cities, many other cities have developed underground space. With the large-scale construction of underground spaces such as underground cities, subways, and underground parking lots, these places that require 24/7 uninterrupted lighting have unlimited energy-saving potential in energy conservation and emission reduction, and will bring huge LED lighting. Business.