Huangming solar tube specifications:
Three tubes: ? The length is 1.8 meters, the outer diameter is 5.8 cm, and the inner diameter is 3.7 cm.
Super cold polar tube: length 1.9 meters, outer diameter 5.8 cm, inner diameter 4.7 cm.
Light cube tube: length 2.1 meters, outer diameter 8.4 cm, inner diameter 3.7 cm.
Advantages of solar energy:
(1) Universal: The sun shines on the earth and has no geographical restrictions. It can be found everywhere, whether on land or in the ocean. on mountains or islands, and can be directly The development and use is easy to collect and does not require 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 pollution increases.The problem of the environment is becoming more and more serious.
(3) Huge: The energy of solar radiation that reaches the Earth's surface each year is approximately equivalent to 130,000 billion tons of coal, and its total amount constitutes the greatest energy that can be developed in the world today.
(4) Long term: Based on estimates of the rate of nuclear energy produced by the sun, hydrogen storage is sufficient to last tens of billions of years, and the duration life of the Earth is also about billions of years. In this sense, we can say that the energy of the sun is inexhaustible.
Disadvantages of solar energy:
(1) Dispersion: Although the total amount of solar radiation reaching the Earth's surface is large, the density of the energy flow is very weak. On average, near the Tropic of Cancer, when the weather is relatively clear in summer, the irradiance of solar radiation est maximum at noon, and the average solar energy received over an area of 1 square meter perpendicular to the direction of sunlight is about 1,000 W if the average day and night throughout the year is only d 'about 200 W. 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 energy source and ultimately become an alternative energy source that can compete with conventional energy sources, the problem of energy storage must be well solved , that is, the energy of solar radiation during clear days should be stored as much as possible for use at night or on rainy days. It is used for everyday use, but energy storage is also one of the weakest links in solar energy use.
(3) Low efficiency and high cost: The level of development of solar energy utilization is theoretically feasible in some aspects and technically mature. However, some solar energy utilization devices have low efficiency and high cost, and the current use efficiency in laboratory does not exceed 30%. In general, the economy cannot compete with conventional energy. In the future, for a period of time, the use of solar energy will beThe further development is mainly limited by economic considerations.
(4) Solar panel pollution: At this stage, solar panels have a certain lifespan. Typically, they need to be replaced every 3 to 5 years at most, and replaced solar panels are very difficult to replace. polluted by nature decompose, causing considerable pollution.