Solar energy is the most direct and most common and cleanest energy on the earth. As a huge amount of renewable energy, solar energy reaches the surface of the earth. The radiant energy is about 250 million barrels of oil per day. It can be said that it is inexhaustible and not used. exhaust. The spectrum of LED is almost entirely concentrated in the visible light band, so the luminous efficiency is high. Most people think that energy saving lamps can save 4/5 energy is a great initiative, but LEDs are more energy-saving than energy-saving lamps, which is a greater solid-state light source. reform.
Solar LED lighting integrates the advantages of solar and LED.
1. Introduction and working principle of solar LED lighting system
The system consists of a solar cell module part (including a bracket), an LED lamp head, a control box (with a controller, a battery) and a light pole; the solar panel has a luminous efficiency of 127 Wp/m2, and the efficiency is high, and the system is resistant to wind. The design is very advantageous; the lamp head portion is a planar light source with a 1W white LED and a 1W yellow LED integrated on a printed circuit board and arranged at a certain pitch.
The control box body is made of stainless steel, which is beautiful and durable. The maintenance-free lead-acid battery and charge and discharge controller are placed in the control box. This system uses valve-regulated sealed lead-acid battery. Because it has little maintenance, it is also called â€œmaintenance-free battery, which is conducive to the reduction of system maintenance cost. The charge and discharge controller is designed with both functions in mind (with light control). , time control, overcharge protection, over discharge protection and reverse connection protection, etc.) and cost control to achieve high cost performance.
The working principle of the system is simple. The solar cell made by the solar photovoltaic effect principle receives solar radiant energy and converts it into electric energy output. The battery is stored in the battery through the charge and discharge controller. At night, the illuminance gradually decreases to about 101ux, and the solar cell The open circuit voltage of the board is about 4.5V. After the charge and discharge controller detects this voltage value, the battery is discharged to the lamp head. After the battery is discharged for 8.5 hours, the charge and discharge controller operates and the battery discharge ends. The main function of the charge and discharge controller is to protect the battery.
2, solar LED lighting system design ideas
2.1 Solar cell component selection
Design requirements: Guangzhou area, load input voltage 24V power consumption 34.5W, working hours 8.5H per day, to ensure continuous rainy days 7 days.
(1) The average annual radiation dose in Guangzhou in the past 20 years is 107.7Kcal/cm2, and the peak sunshine hours in Guangzhou are about 3.424H.
(2) Daily load consumption = 12.2AH
(3) The total charging current of the required solar modules = 1.05 Ã— 12.2 Ã— Ã· (3.424 Ã— 0.85) = 5.9A
Here, the shortest design period between two consecutive rainy days is 20 days, 1.05 is the integrated loss factor of the solar cell module system, and 0.85 is the battery charging efficiency.
Indoor LED Display is widely used in stadium, shopping mall, station, office and hotel for advertising with characteristics of high brightness, large viewing angle, high safety, long life span, light weight, fast installation and easy maintenance etc. Indoor Led Display can be mainly divided into mounted screen and pillared screen. General Equipment for Indoor Led Display: 1. Video processor with multiple signal channel, satisfying the switch of different perspectives from live broadcast, advertising image and on-scene interview; 2. Splicer a kind of high and new equipment dividing a complete image into several blocks to achieve a large dynamic screen with multiple ordinary video units; 3. DVI distributor used for multiple digital video output with one-way digital video input and multi-channel video output function, to display images of the same DVI signal source with multiple digital display terminal in multimedia application system.
Indoor LED Display
Indoor Led Display,Led Advertising Panel,Led Screen Wall,Led Curtain Wall Display
Shenzhen Joy LED Display Co., Ltd. , https://www.joe-led.com