Talking about the advantages of off-grid power generation system solar street light-litelsolar manufacturers

Through the comparative analysis of several common new energy sources such as biomass energy, hydro energy, wind energy and solar energy, it can be clearly concluded that solar photovoltaic power generation has the following unique advantages: 1) Photovoltaic power generation has economic advantages. The economics of solar energy utilization can be viewed from two perspectives. One is that solar energy is inexhaustible, and no 'tax' is levied when receiving solar energy, and it can be used anywhere; the other is that under the current level of technological development, some solar energy utilization has become economical. With the development of science and technology and the technological breakthrough of human development and utilization of solar energy, the economy of solar energy utilization will become more obvious. If the 20th century was the oil century, then the 21st century is the century of renewable energy (the century of solar energy). From the perspective of the construction cost of solar photovoltaic power stations, with the large-scale application and promotion of solar photovoltaic power generation, especially the maturity of the upstream crystalline silicon industry and photovoltaic power generation technology, the composite development and utilization of building roofs, exterior walls and other platforms, every The construction cost of kW solar photovoltaic power generation can reach 5,000 to 10,000 yuan in 2015, which has the same economic advantages compared to other renewable energy sources. 2) Solar energy is an inexhaustible renewable energy source with huge availability. The energy emitted by the sun per second is about 1.6×1023kW, of which the energy reaching the earth is as high as 8×1013kW, which is equivalent to 6×109t standard coal. According to this calculation, the total amount of solar energy reaching the earth's surface in one year is equivalent to about 1.892 × 1013 billion tons of standard coal, which is 10,000 times the proven reserves of the world's main energy sources. The life of the sun is at least 4 billion years. Compared with human history, the time that solar energy can continuously supply the earth can be said to be infinite. This determines that the development and utilization of solar energy will be the most effective way for mankind to solve the shortage and depletion of conventional energy. way. From the perspective of the amount of resources that can be developed in my country, scholars and experts have generally recognized the figures as follows: biomass energy is 100 million kW, hydropower is 378 million kW, wind power is 253 million kW, and solar energy is 2.1 trillion kW. It is only necessary to develop solar energy resources. 1% of the total is 21 billion kW; from the perspective of its proportion, biomass energy accounts for only 0.46%, wind power accounts for 1.74%, hydropower accounts for 1.16%, and photovoltaic power accounts for 96.64%. 3) No pollution to the environment. Solar energy, like wind energy, tidal energy and other clean energy sources, hardly produces any pollution during its development and utilization. In addition, its unlimited reserves make it an ideal alternative energy source for human beings. Since traditional fossil fuels (coal, oil and natural gas) discharge a large amount of toxic and harmful substances during use, they will cause serious pollution to water, soil and atmosphere, form greenhouse effect and acid rain, and seriously endanger the living environment and health of human beings. Therefore, it is urgent to develop new and relatively clean alternative energy sources, and solar energy, as an ideal clean energy source, is receiving increasing attention from countries all over the world. Judging from the current carbon emissions of various power generation methods, the upstream links are not calculated: coal power is 275g, oil power is 204g, natural gas power is 181g, wind power is 20g, and solar photovoltaic power generation is close to zero emissions. In addition, in the process of power generation, there is no waste residue, waste, waste water, waste gas, no noise, no harmful substances to human body, and no pollution to the environment. 4) The conversion link is the least and most direct. From the perspective of energy conversion, solar photovoltaic power generation directly converts solar radiation energy into electrical energy. It is the least conversion link and the most direct utilization of solar photovoltaic power generation in all renewable energy utilization. Generally speaking, in the energy flow of the entire ecological environment, with the increase of conversion links and the lengthening of the conversion chain, the energy loss will increase geometrically, and at the same time, the construction and operation costs and instability of the entire system will be greatly increased. . At present, the practical level of conversion efficiency of crystalline silicon solar cells is between 15% and 20%, and the highest laboratory level has reached 35%. 5) The most economical, cleanest and most environmentally friendly. In terms of resource conditions, especially land occupation, biomass energy and wind energy are more demanding, while solar energy is very flexible and extensive. If solar photovoltaic power generation needs to occupy a land area of u200bu200b1, the wind power is 8 to 10 times that of solar energy, and the biomass energy is 100 times. For hydropower, the construction of a large dam often needs to submerge dozens to hundreds of square kilometers of land. In contrast, solar photovoltaic power generation does not need to occupy more land, roofs and walls can be used as places for solar photovoltaic power generation, and the vast deserts of our country can also be used to directly build solar photovoltaic power generation bases on the desert. Reduce the direct solar radiation in the desert area to the surface, effectively reduce the surface temperature, reduce the amount of evaporation, and then make the survival and growth of plants possible to a considerable extent, stabilize and reduce sand dunes, and obtain the needed clean and renewable energy from nature . 6) Free to use and no shipping required. Humans can convert light energy into heat or electricity through specialized technologies and equipment, and use them on the spot without transportation, for the benefit of mankind. And human use of this inexhaustible energy is also free. Although solar radiation is not uniform due to differences in latitude and climatic conditions, compared with other energy sources, solar energy is universal in most areas on the earth and can be used locally, which is a conventional Energy-deficient countries and regions provide bright prospects for solving energy problems.