30,000 street lamps in Zhuzhou City will turn into LEDs within 6 months

On November 10th, the municipal government executive meeting made it clear that Zhuzhou City will carry out energy-saving renovation of 30,000 street lamps in urban areas within 6 months.

LED street lights can save 40% to 50%

There are 40050 street lamps in Zhuzhou City, including high-pressure sodium lamps 30551盏, LED street lamps 5726盏, ordinary energy-saving lamps and other light source street lamps 3773盏. According to the renovation plan, 30,000 high-pressure sodium lamps in the main and secondary trunk roads, squares, bridges and small streets and alleys will be replaced with LED street lamps.

LED street lamps have low energy consumption, and the power saving rate is 40% to 50% higher than that of high-pressure sodium lamps; the service life is up to 10 years, which is 5 times that of high-pressure sodium lamps; the power factor is between 0.96 and 0.99, and there is almost no loss.

After the implementation of energy-saving renovation of 30,000 high-pressure sodium lamps, it is estimated that the annual electricity consumption can be reduced by 25.47 million kWh, which can save 10189 tons by converting into standard coal, reduce carbon emissions by 25,396 tons, reduce sulfur dioxide emissions by 764 tons, and reduce nitrogen oxide emissions. The amount is 382 tons.

EMC introduced a new model of financing the project <br> <br> preliminary estimates, the total expenditure lights energy-saving projects of about 156 million yuan. To this end, Zhuzhou City introduced a new investment and financing model - contract energy management model (referred to as EMC), that is, the energy-saving service company first invested in energy-saving transformation, and then repaid its investment in proportion to the energy-saving benefits and annual. This model has the advantage of “zero investment, zero risk”.

After the energy-saving renovation, the annual power consumption of urban street lamps will drop from the original 44.4 million kWh to 18.93 million kWh. Compared with the previous street lights, the annual electricity cost can be saved by 23.08 million yuan. Compared with the current energy-saving operation mode, the annual electricity cost can still be saved by more than 17 million yuan. In the EMC mode, the saved electricity bill can cover the investment cost of the renovation project.

In recent years, in large-scale shopping malls or activities, we always see the figure of "LED fan". Its appearance is similar to the fan, but it can display various patterns when rotating, and some can display dynamic 3D patterns, which is very cool. Every time we see it, we can always make people stop and watch it, which plays a very good role in publicity and promotion. So how do LED fans display patterns?

3D smart screen


Strictly speaking, this so-called "fan" is just a vivid way to call it. In fact, it is a kind of "rotating LED light bar", and its professional name is holographic 3D smart glare screen. After power on, the "fan blade" starts to rotate, which can present a 3D image at the same time, cool and lifelike. At the same time, according to the size and color of the pattern, the LED fan can well hide its leaves, because there is no frame and no fixed screen, so the dynamic picture is like floating in the air, very realistic.


The 3D smart screen not only uses the hardware of rotating LED, but also uses the visual persistence of human eyes. For the hardware equipment of rotating LED, simply speaking, it is to calculate the change frequency of LED light according to the rotation speed of "fan blade". When different LED lights are lit at different times, different patterns will appear. The so-called visual persistence refers to that when the human eye is observing the scene, the light signal is transmitted to the brain nerve, which takes a short period of time. After the end of the role of light, the visual image does not disappear immediately, and the human eye can still maintain its image for about 0.1-0.4 seconds. This kind of residual vision is called "afterimage". The visual phenomenon is called "visual persistence", and the single product can be unique. Vertical display effect can also display the overall effect in combination.

3D holographic fan screen


3D holographic fan screen application: shopping malls, brand stores, stores, airports, etc. A good choice to reflect brand effect and brand grade


Principle of 3D holographic screen: Generally speaking, one or more strings of LED lights are arranged on the fan blades. Here, it is assumed that there are 20 LED lights, which are numbered 1-20 at a time from the axis to the edge of the fan blades. In order to explain the principle briefly, we assume that when the fan speed is 60 laps per minute (in reality, the speed is much higher), the human eye will have visual persistence. Let's assume that the LED light is 0 degrees above the fan in 0 seconds. If you want to display the effect of 6:00 on the fan, the minute hand needs to point to the top and the hour hand needs to point to the bottom. It is necessary to turn on the number 1-20 to display minute hand in 0 second, turn on the number 1-10 to display hour hand in 0.5 second, turn on the number 1-20 to display minute hand in 1 second, turn on the number 1-10 to display hour hand in 1.5 second, and so on, so that the human eye will receive a complete picture of the clock at 6:00. For complex patterns, LED fans will have more complex structure and programming equipment. Through the combination of LED light bar rotation and visual persistence, people will see a dynamic 3D picture of the rotating LED fan.


3D holographic fan screen structure: the screen body mainly has light bars and, according to different ones, some have two. Add rotary motor, built-in 3D holographic system and information receiving system.


At present, the main application of 3D smart screen is advertising. Because of its editability and realistic display effect, it is believed that in the near future, it will be applied in more fields.

3D holographic fan


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