Introduction to the sun in shenzhen street lamp can use the advantages and disadvantages of street lamp

For solar street lamps, and constantly improve gradually fit to use, for our country a lot of solar energy products, at the time of using solar energy for power, also want to pay attention to the advantages and disadvantages of solar energy. Advantage ( 1) Common: sun shines the earth



for solar street lamps, and constantly improve gradually fit to use, for our country a lot of solar energy products, at the time of using solar energy for power, also want to pay attention to the advantages and disadvantages of solar energy. Advantage ( 1) Common: the sun shine, no regional restrictions whether land or sea, mountains or islands, everywhere all have, can be directly monocrystalline silicon solar energy development and utilization, and need not mining and transportation. ( 2) Harmless: the exploitation and utilization of solar energy will not pollute the environment, it is one of the most clean energy, in today's environment pollution is more and more serious, it is extremely valuable. ( 3) Huge: on the surface of the solar radiation that reaches the earth each year about 130 trillion tons of coal, the total amount of today can be developed in the world's largest energy. ( 4) For a long time: according to the current produced by the sun nuclear rate estimation, hydrogen 【 Hydrogen is a kind of chemical elements in the periodic table is located in the first place. 】 Enough reserves to maintain billions of years, and the earth's life will be around for billions of years, in this sense, can be said to the sun's energy is inexhaustible. Disadvantages ( 1) Dispersion: to the amount of solar radiation on the surface of the earth although very big, but can flow density 【 Energy flow density is within a certain space, per unit area ( Such as square meters) What can be achieved or unit weight ( Such as kg) Energy will have a certain energy energy or power. 】 Is very low. On average, the tropic of cancer' The tropic of cancer and the tropic of cancer, Tropic of Cancer originated from the English name of the Tropic of Cancer, more than two thousand years ago) , the sun is in the northern hemisphere can direct to the position of the farthest from the equator, is a parallel, which is around to plane and the earth by the earth around the sun into the Angle of the equatorial plane, also - beihuiguixian】 Nearby, in summer the weather is sunny, noon irradiance of solar radiation, the largest in the direction perpendicular to the sunlight 1 square meter area receives an average of about 1000 w solar power; If according to the annual average day and night, only about 200 w. And in the winter only roughly half, cloudy day only 1/5 or so commonly, this energy flow density is very low. So in the use of solar energy, want to get a certain switching power, often require area is quite a collection and conversion equipment, cost is higher. ( 2) Instability: by day and night, season, geographical latitude and altitude, and the natural conditions such as sunny, cloudy, cloud, rain, etc. The influence of random factors, so to reach a ground of solar irradiance 【 Solar irradiance refers to the absorption and scattering solar radiation through the atmosphere, such as reflection effect after reach the surface of the solid earth on unit area per unit time of radiation energy. 】 Is intermittent and unstable, this increases the difficulty to the mass of solar energy application. Continuous and stable in order to make solar energy, and eventually be able to compete with conventional energy alternatives, it is necessary to well solve the problem of energy storage, namely the sunny during the day the sun radiant energy stored as far as possible, for the night or rainy day, but at the moment, energy storage is one of the relatively weak link in solar energy utilization.