Solar energy does not cause any pollution to the environment, that is why it is called green and clean energy.
The direct use of solar energy by man in is still in its infancy, mainly including solar heat collection and solar hot water. systems, solar greenhouses and solar energy production, etc. Advantages: (1) Universal: The sun shines on the earth, no matter land or ocean, no matter mountains or islands, it is everywhere. It can be directly developed and used without the need for mining or transportation.
(2) Harmless: The development and use of solar energy will not pollute the environment. It is one of the cleanest sources of energy, which is extremely valuable today as environmental pollution becomes more and more serious.
(3) Huge: the energy of solar radiation that reaches the Earth's surface every equine yearworth approximately 130,000 billion tons of standard coal, and its total quantity is the largest energy that can be developed in the world today. .
(4) Long term: Based on the current rate of nuclear energy generated by the sun, hydrogen storage is sufficient to last tens of billions of years, and life on Earth is also about billions. of years. In this sense, we can say that the energy of the sun is inexhaustible.
Disadvantages: (1) Dispersion: Although the total amount of solar radiation reaching the Earth's surface is large, the energy flux density is very low. On average, near the Tropic of Cancer, when the weather is relatively clear in summer, the irradiance of solar radiation is greatest at noon. The average solar energy received in an area of 1 square meter perpendicular to the direction of sunlight is approx. 1000W if the total average day and nightt throughout the year, it's only about 200W. In winter it is only about half, and on cloudy days it is usually only about 1/5. This energy flow density is very low. Therefore, when using solar energy, if we want to obtain a certain conversion power, we often need a set of collection and conversion equipment with a considerable area, which is expensive.
(2) Instability: due to the limitations of natural conditions such as day and night, season, geographic latitude and altitude, as well as the influence of random factors such as clear , cloudy, cloudy, rain, etc., reaching a certain ground Solar irradiation is both intermittent and extremely unstable, which makes the large-scale application of solar energy more difficult. In order to make solar energy a continuous and stable source of energy and, ultimately, to become a sSince alternative energy can compete with conventional energy sources, the problem of energy storage should be well solved, that is, the energy from solar radiation during clear days should be stored as much as possible for use at night or when it rains. It is used for everyday use, but currently energy storage is also one of the weakest links in solar energy use.
(3) Low efficiency and high cost: At the current level of development of solar energy utilization, some aspects are theoretically feasible and technically mature. However, some devices using solar energy have low efficiency and high cost. Generally speaking, the economy cannot compete with conventional energy sources. For a considerable period, the future development of the use of solar energy will be mainly limited par economic reasons. Haier Solar Energy Beijing Sales Center