The common advantage of solar power, wind power and tidal power is that they are renewable energy and can significantly reduce greenhouse gas emissions. greenhouse such as carbon dioxide. The disadvantages of solar power generation are that its cost is too high, wind power is severely limited by geography, and the use of tidal power generation imposes high requirements on anti-wind performance. seawater corrosion of power generation equipment. Nuclear energy has remarkable advantages. The cost of nuclear power generation mainly concerns the infrastructure cost of nuclear power plants, which is approximately twice as high as that of conventional thermal power plants. However, uranium dioxide as a fuel is inexpensive and easy to transport. store. The energy density of the fuelNuclear power is millions of times greater than fossil fuels, so the fuel used in nuclear power plants is low. A 1,000 megawatt nuclear power plant requires only 30 tonnes of uranium fuel per year, which can be transported. by plane flight. The safety of nuclear power plants is extremely high. The currently operating reactors will not cause radioactive material leakage accidents, at least technically, their safe operation can be fully guaranteed. Nuclear power plants can produce a large amount of thermal energy without producing dust, greenhouse gases, etc. like conventional power plants.
So far, no other energy source can replace nuclear energy, and other energy sources cannot match it in terms of economy and efficiency. The disadvantage of nuclear power generation is qt there is no perfect and absolutely safe method for handling spent fuel.
In small power generation systems, what are the advantages and disadvantages of solar power, wind power, and hydroelectric power?
Clean energy includes: solar energy, wind energy, hydropower, etc.
1. Solar energy
Solar energy is a renewable energy source. It refers to the radiant thermal energy of the sun (see the three modes of propagation of thermal energy: radiation), and its main manifestation is often called solar rays. Nowadays, it is typically used to generate electricity or provide energy for water heaters. Since the birth of life on earth, it has relied primarily on thermal radiation energy provided by the sun. Since ancient times, humans have also known how to useizing sunlight to dry objects and using it as a method of making food, such as crafting. salt and dry the salted fish.
As fossil fuels decline, solar energy has become a significant part of human energy consumption and continues to grow. There are two ways to use solar energy: photothermal conversion and photoelectric conversion. Solar power generation is an emerging renewable energy source.
2. Wind energy
Wind energy is the kinetic energy generated by air flow. A converted form of solar energy. Due to the uneven heating of various parts of the earth's surface caused by solar radiation, the pressure distribution in the atmosphere is unbalanced. Under the action of the horizontal pressure gradient, the air moves in the horizontal direction to form wind. The total reserves of rWind sources are very large and the energy that can be developed technically in one year is approximately 5.3 x 10^13 kilowatt hours.
Wind energy is a renewable and clean energy with large reserves and wide distribution. However, its energy density is low (only 1/800 of the energy of water) and unstable. Under certain technical conditions, wind energy can be developed and used as an important energy source.
3. Water energy
Water energy is a kind of energy, clean energy and green energy. It refers to energy resources such as kinetic energy, potential energy and pressure energy of bodies of water. . Water energy is a renewable energy, hydraulic energy is mainly used for the production of hydroelectric power. Hydroelectricity converts the potential and kinetic energy of water into electrical energy. A usiA plant that produces electricity from water is called a hydroelectric power station, or hydroelectric power station for short, also known as a hydroelectric power station. The advantages of hydroelectricity are its low cost, its continuously renewable production and its non-pollution. The disadvantage is that the distribution is strongly limited by natural conditions such as hydrology, climate and relief.
Advantages and disadvantages of solar energy:
1 Advantages
1 Universal
The sun . shines on the earth, there is no geographical restriction, no matter land or sea, no matter mountains or islands, it is everywhere, can be directly developed and used, easy to collect, and does not require mining nor transport.
2. Harmless
The development and use of solar energy will not pollute the environment. It is one of the cleanest sources of energyes, which is extremely valuable today, when environmental pollution is becoming more and more important. serious. .
2. 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, and the average solar energy received over an area of 1 square meter perpendicular to the direction of light solar is about 1,000 W if the day and night average throughout the year is only 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 one wishes to obtain a certain conversion power, one often hasneed a set of collection and conversion equipment of a considerable area, which is expensive.
2. Instability
Due to limitations of natural conditions such as day and night, season, geographic latitude and altitude, as well as random factors such as clear, cloudy, cloudy, and rain , solar irradiation reaching a certain ground is both intermittent and extremely unstable, making large-scale application of solar energy more difficult.
In order to make solar energy a continuous and stable energy source, and ultimately an alternative energy source capable of competing with conventional energy sources, the problem of solar energy storage energy must be well resolved, that is to say the energy of solar radiation. in clear weather it should be stored as much as possible. It can be used at night or rainy days, but energy storage is also one ofweakest links in the use of solar energy.
Reference for the above content: Baidu Encyclopedia - Solar Energy
Reference for the above content: Baidu Encyclopedia - Hydro Power
What is solar energy Energy, wind energy and tidal energy? Renewable/non-renewable energy?
After comparing the three, the disadvantages are:
1. Solar energy is affected by rainy days (cannot continue to produce electricity when there is no light)
Wind energy is affected by climate ( when air cannot form convection, it cannot continue to produce electricity)
Hydraulic energy is affected by the flow of water (it cannot continue to generate electricity during dry seasons)
Based on the above, the three are mutually exclusive. The difference is that,
from a point of vsequential ue: solar energy is the most primitive form of energy, followed by wind energy and water (potential energy); wind and water are not as good as the sun
From a distribution point of view: they are everywhere, water is not as good as the sun; sun and wind
From a collection point of view: construction A dam has a long lifespan and can also be used to store water for agriculture and has many uses. Sun and wind are not as good as water
From the point of view of practical use: Once a family has the equipment, it will become a river. Water is not as good as sun and wind
From the point of view of environmental protection and energy saving: water, the construction of dams transforms nature; the sun and wind do not directly affect nature;
Nuclear energyis renewable. Solar energy is the energy produced by the continuous nuclear fusion reaction process inside the sun. The average intensity of solar radiation in Earth orbit is 1,367 kW/m2. The circumference of the Earth's equator is 40,000 km, so we can calculate that the energy obtained by the Earth can reach 173,000 TW.
The standard maximum intensity at sea level is 1 kW/m2, and the 24-hour average annual radiation intensity at a certain point on the Earth's surface is 0.20 kW/m2, which is equivalent to 102,000 TW of energy. .
Advantages of solar energy
(1) Universal: The sun shines all over the earth and has no geographical restrictions. It can be found everywhere, regardless of land or sea, mountains or islands. , and can be directly developed and the use is easy to collect and does not require mining and transportation.
(2) IHarmful: 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 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.