Can Solar Street Lights Give off Some Heat?
Dec 07, 2024
There are many problems encountered in the popularization of solar street lights. Some are due to high prices, some are due to poor lighting conditions, and part is the heat dissipation problem of solar LED street lights. As a lighting fixture, it will generate a certain amount of heat. In this article, we will learn about the heat dissipation problem of solar powered street lights, hoping to bring you some help!
The heat dissipation design of solar street lights is of great significance for their normal operation, as the solar street light module generates more or less heat during the operation process. However, the accumulation of heat will directly affect the service life of the solar powered street lights. To effectively dissipate the heat of the streetlights, thermal panels, heat sinks, or intelligent thermal management systems can be employed to reduce the temperature of the solar streetlights and ensure their long-term stable operation.
Why do solar powered LED street lights generate heat?
The generation of heat is a normal phenomenon in the operation of solar powered outdoor street lights. The sources of this heat include energy conversion of solar panels and energy consumption during the operation of equipment.1. Solar panels
When sunlight shines on the panels of solar LED street lights, it causes the electrons in the solar panel cells to be excited and start moving. This movement of electrons generates a small amount of heat, which is dissipated by the radiator of the solar panel.2. LED lamp beads
The light source of solar powered LED street light is LED, very efficient lamps, but during use, 10%-30% of the electrical energy will still be converted into heat energy, which will be dissipated into the air through the lamp housing to maintain the normal operating temperature of the LED lamp beads.3. Storage battery
The battery of the solar street light will also generate heat during the charging and discharging process. The chemical reaction inside the battery and the current passing through the resistor will generate heat.4. Ambient temperature and design factors
If the temperature of the installation environment of the solar powered LED street light is too high, the temperature of the equipment surface will increase due to direct solar radiation or poor heat dissipation. In addition, if the heat dissipation design of the lamp is unreasonable, heat will also accumulate, causing the temperature of the equipment to rise.The impact of heat on solar powered outdoor street lights
The accumulation of heat will have a certain impact on the solar street light system, resulting in unstable operation, such as flickering lights or automatic shutdown. Heat will also accelerate the aging of components, increase the frequency of equipment maintenance and replacement, and increase operating costs.1. Impact on solar panels
The power generation efficiency of solar panels will decrease with the temperature increase. High temperatures will also aggravate the aging of photovoltaic panels and shorten their service life.2. Impact on batteries
The optimal operating temperature of lithium batteries or lead-acid batteries is around 25℃. High temperatures will reduce their charging and discharging efficiency, accelerate chemical reactions, cause battery capacity decay, and shorten life. Under extremely high temperatures, lithium batteries may also overheat and expand.3. Impact on LED lights
LED lights are susceptible to temperature changes. High temperatures may cause their light efficiency to decrease and brightness to weaken. If they run at high temperatures for a long time, LED lights will age, and their lifespan will be shortened, affecting the lighting effect of solar powered outdoor street lights.What are the common ways to dissipate heat from solar street lights?
Heat dissipation design is a very important link in the design and production process of solar powered street lights, and it is also one of the technical bottlenecks that restricts its widespread application. The quality of heat dissipation design will directly affect the service life of solar powered street lights. At present, there are three common heat dissipation methods for solar powered LED street lights.1. Heat dissipation of heat-conducting plate
It is to dissipate the heat generated inside the machine to the conductor and then conduct the heat out of the lamp head through the meson to dissipate the heat. The conductor is generally a 5mm-thick copper plate, which is a temperature-equalizing plate that makes the temperature of the heat source balanced and increases the heat dissipation area. When choosing the material of the heat-conducting plate, it is necessary to choose a material with good thermal conductivity to improve the heat dissipation efficiency, and at the same time, it is necessary to consider the strength and weight of the material to ensure the stability and safety of the solar LED street light.2. Needle heat dissipation
Optimize the structural design of the radiator, such as increasing the number of fins, changing the shape and spacing of the fins, etc., to increase the heat dissipation area and heat dissipation efficiency. At the same time, ensure that the radiator is easy to install and disassemble and easy to maintain and replace. The heat dissipation efficiency of the needle radiator is greatly improved compared with the traditional fin radiator, which can reduce the LED junction temperature by more than 15°C compared with the ordinary radiator. The waterproof performance is better than that of the ordinary aluminum radiator, and the weight and volume are also improved.3. Thermal management
Adopt an intelligent thermal management system to monitor the working temperature and heat dissipation of the solar street light in real time. When the temperature exceeds the set value, the heat dissipation device is automatically started, or the power of the LED light source is reduced to control the temperature and extend the service life of solar powered street lights.The heat dissipation design of solar street lights is of great significance for their normal operation, as the solar street light module generates more or less heat during the operation process. However, the accumulation of heat will directly affect the service life of the solar powered street lights. To effectively dissipate the heat of the streetlights, thermal panels, heat sinks, or intelligent thermal management systems can be employed to reduce the temperature of the solar streetlights and ensure their long-term stable operation.
