Solar photovoltaic power generation is a way of generating electricity that directly converts solar energy into electrical energy. It includes four forms: photovoltaic power generation, photochemical power generation, light induction power generation and photobiological power generation.
Photovoltaic power generation: when an object is exposed to light, the state of charge distribution in the object changes generating an electromotive force and a current. Since the conversion efficiency of monocrystalline silicon is now higher than that of polycrystalline silicon, but the production cost of polycrystalline silicon panels is lower, many polycrystalline silicon panels are now used to generate electricity.
Among them, photochemical power generation includes: electrochemical photovoltaic cells, ph cellsotoelectrolysis and photocatalytic cells. ② Solar thermal power generation - it first converts solar energy into thermal energy, and then converts thermal energy into electrical energy. It has two conversion methods: one is to directly convert solar thermal energy into electrical energy. Another way is to use solar thermal energy to drive a generator to produce electricity via a heat engine.
There are two methods of solar power generation: one is the light-heat-electricity conversion method and the other is the direct light-electricity conversion method. (1) The light-heat-electricity conversion method generates electricity using thermal energy generated by solar radiation. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid, then drives a steam turbine to produceew electricity. The first process is a light-heat conversion process; the second process is a heat-electricity conversion process, which is the same as ordinary thermal power generation. The disadvantages of solar thermal power generation are that its efficiency is very low and its cost is high. Its investment is estimated to be at least higher than that of ordinary thermal power generation. Power plants are 5-10 times more expensive.
Current methods of generating electricity include: solar power generation, hydroelectric power generation. , thermal power generation, nuclear power plants, wind power generation, geothermal power generation, tidal power generation, etc. I hope my answer can be useful to you. Help yourself
Solar street lightswhite light is good. Professional termsLEDs are called positive white light and warm white light. Each color of light has a color temperature segment. Color temperature is a unit of measurement that represents the color components contained in light. understand its superficial meaning. More The deeper meaning still needs to be explored for oneself.
Selection criteria for solar street lights
The color temperature of solar street lights is mainly white light around 5000K, yellow light or warm white light around 3000K In. Actually, the color temperature is around 3000K. Yellow light or warm white light is more suitable for road lighting, while the color temperature of street lights Solar lights around 5000K are not suitable for road lighting, because the color temperature of 5000K will make people look cold and dazzling, resulting inra excessive visual fatigue. Under such conditions, people's ability to observe from a distance will also decrease, reducing the driver's driving safety.
Low color temperature light makes people happy and comfortable in low light situations. High color temperature can make people look gloomy, gloomy and cold. In bright lighting situations, light with a low color temperature can make people feel stuffy. , high color temperature will make people feel comfortable and happy, the workplace requires high lighting and high color temperature environment, and the rest place requires low lighting and low color temperature environment .
ColorThe temperature is below 3300K, the light color is reddish, giving a warm feeling, a stable atmosphere and a warm feeling. Color temperature is understoode between 3000 and 6000 K. People do not have particularly obvious visual and psychological effects under this tone. , and they have a refreshing feeling. Therefore, it is called neutral color temperature. The color temperature exceeds 6000K and the light color is bluish, giving people a cool feeling.