Advantages of solar energy
As a new energy source, solar energy has three major characteristics compared to conventional energy sources: First: it is the source of The most abundant energy that humans can use. It is estimated that over the past 1.1 billion years, the sun has consumed 2% of its energy. In the future, it will be enough to supply humans on earth for billions of years. It is truly inexhaustible. Second: there is solar energy everywhere on the planet, which can be developed and used locally without transport problems. It is particularly valuable for rural areas, islands and remote areas where transportation is underdeveloped. Third: Solar energy is a clean energy source. During development and use, no waste residue, waste water, waste gas or noise will be produced and it will not affectnot ecological balance. Absolutely no pollution or public nuisance will be caused.
·Disadvantages of solar energy
First: the energy density is low and when the sunshine is good, the energy received by 1 square meter of soil is only of approximately 1 kilowatt. A fairly large lighting and heat collection area is often required to meet the usage requirements, resulting in the device occupying a large area, using a lot of materials and increasing the cost. Second: the weather has a big impact. The intensity of solar radiation reaching a certain ground is affected by factors such as region, climate, season, and changes in day and night. He is sometimes strong, sometimes weak and sometimes unavailable. brings many difficulties of use. In order to overcome the promotion problem of application difficulties, people have made great improvements inn the selection of appropriate materials and optimal thickness for the insulation of the water tank, so that the water temperature can be reduced to a minimum in the short term (one or two). In addition, the addition of an auxiliary heat source allows the solar water heater to be used in all circumstances and becomes an all-weather solar water heater.
·Technical areas of solar energy utilization
There are three major technical areas in which humans use solar energy only, namely photothermal conversion, photovoltaic conversion and photochemical conversion. energy storage technology.
Photochemical conversion of sunlight includes: photosynthesis, photoelectrochemistry, photosensitive chemistry and photodecomposition reaction. Currently, this technical field is still at the experimental research stage.
Solar photoelectric conversion mainly includesvarious types of solar panels and power supply systems.
A solar cell is a device that directly converts sunlight into electrical energy.
The photoelectric efficiency of solar cells is about 10-14%, and their product types mainly include monocrystalline silicon, polycrystalline silicon and amorphous silicon. The price of domestic products (referring to the total cost of photovoltaic devices) is about 60-80% yuan/peak watt.
Solar cells have a wide range of applications. For example, artificial satellites, unmanned weather stations, communications stations, television relay stations, solar clocks, electric fences, black lights, navigation beacons and railway signals.
Sunlight thermal conversion technology has the largest number of products.Such as water heaters, water boilers, dryers, heating and cooling, greenhouses and solar rooms, solar cookers and high temperature ovens, desalination devices, water pumps, devices thermal energy production and solar medical equipment.
Answer 2:
Advantages
1. Solar energy is the most abundant source of energy that humans can use. Solar energy is the most abundant energy available to humanity. Rich energy.
It is estimated that over the past 1.1 billion years, the sun has consumed only 2% of its own energy, and this will not change significantly over the next billion years, the sun can therefore serve as a source of energy. Permanent, inexhaustible and inexhaustible human energy. It is estimated that over the past 1.1 billion years, the sun has consumed only 2% of its own energy. The sun does notwill not change significantly over the next billion years, so it can be used as a permanent energy source for humanity. Inexhaustible, inexhaustible. It irradiates the ground with energy for 15 minutes, which is enough for the whole world to use for a year. It irradiates the ground with energy for 15 minutes, which is enough for the whole world to use for a year.
2. Solar energy is available everywhere and does not require transportation. Solar energy is available everywhere and requires no transportation.
Areas between 50 and 60 degrees north and south latitude are generally thought to have abundant solar energy that can be used provided that a certain amount of money is initially spent to build a device for using solar energy. energy will be available. It will be delivered to your door in a constant flow, "freeuitely.” Areas between 50 and 60 degrees north and south latitude are generally thought to have abundant solar energy that can be used. As long as a certain amount of money is initially spent to build a solar energy utilization device, energy will continually be supplied to your home. door, “free” supply. During this period, a small amount of equipment maintenance fees will be requested. During this period, a small amount of equipment maintenance fees will be requested.
3. Solar energy is a clean energy source. Solar energy is a clean energy source.
Coal, oil and other fossil fuels produce harmful gases and waste residues, but when using solar energy, they will not cause pollution or emit any substances having a negative impact on the environment. clean energy source. Fossil fuelss such as coal and oil produce harmful gases and waste residues. When using solar energy, they do not cause pollution and do not emit any substances that have a negative impact on the environment. Of course, after extensive use of solar energy, the temperature of the environment will increase slightly due to the full use of solar energy, but this temperature increase will not cause adverse effects on the environment. . Of course, after extensive use of solar energy, the temperature of the environment will increase slightly due to the full use of solar energy, but this temperature increase will not cause adverse effects on the environment. .
4. Solar energy systems are also called “variable energy systems”. Solar energy systems are also called “variable energy systems”.
The aeneSolar energy does not add a thermal load to the Earth, which is a particularly important advantage of solar energy. This is why systems that use solar energy are also called “variable energy systems”. Solar energy does not add a thermal load to the Earth, which is a particularly important advantage of solar energy. This is why systems that use solar energy are also called “variable energy systems”. Because when we use solar energy to do work, even though it eventually turns into heat, if we don't use it to do work, it will eventually turn into heat. Because of usUsing solar energy to do work will eventually turn into heat, but if we don't use it to do work, it will eventually turn into heat. On the other hand, when we use coal, the fartrole, uranium splitting and nuclear fusion, it looks like it will eventually turn into heat, but if we don't mine it for use, no heat will be produced. On the other hand, when we use coal, oil, uranium splitting and nuclear fusion, it seems that it will eventually turn into heat, but if we don't exploit it for use, no heat will be produced. This heat is therefore an additional thermal load added to the earth. This heat is therefore an additional thermal load added to the earth. In order to evacuate this additional heat load, the earth must generally increase its temperature. In order to evacuate this additional heat load, the earth must generally increase its temperature.
5. Solar Energy Safety
Nuclear power generation poses a risk of nuclear leakage. Once a nuclear leak occurs, itwill cause serious damage. This is an ecological crisis, but solar energy absolutely has no such situation and is very reliable. Nuclear power generation poses a risk of nuclear leakage. Once a nuclear leak occurs, it will cause a huge ecological crisis. However, solar energy absolutely has no such situation and is very reliable.
Disadvantages Disadvantages
1. The device for using solar energy must have a considerable area. 1. The solar energy utilization device must have a considerable area.
Although the solar energy reaching the entire ground is very enormous, this energy is very dispersed. As an energy source, its density is too low. Although the solar energy reaching the entire ground is very enormous, this energy is very dispersed and its density is too low as an energy source. Consequently, the device for usingsolar power needs to have a considerable surface area to collect enough energy. Therefore, the solar energy utilization device must have a considerable area to collect enough energy. However, the larger the area, the higher the cost. However, the larger the area, the higher the cost. Only when the surface unit cost of the energy harvesting device is relatively cheap can the solar energy utilization device be used economically. Only when the surface unit cost of the energy harvesting device is relatively cheap can the solar energy utilization device be used economically.
2. Solar energy is affected by climate, day and night. 2. Solar energy is affected by climate, day and night.
Solar energy is strongly affected par the climate, day and night, and is extremely unstable. Solar energy is strongly affected by climate, day and night, and is extremely unstable. Therefore, a storage device is required, which not only increases technical difficulties, but also increases the cost. Therefore, a storage device is required, which not only increases technical difficulties, but also increases the cost. Although a variety of storage systems have been realized, they are still not ideal and there are some difficulties in specific applications. Although a variety of storage systems have been realized, they are still not ideal and there are some difficulties in specific applications.
Summary - The use of solar energy is imperative Summary - The use of solar energy is imperative
Looking at the advantages and disadvantages of using solar energytion of solar energy, it turns out thatThe development of solar energy remains very desirable. Considering the advantages and disadvantages of using solar energy, it remains very desirable to develop solar energy. Visual pollution is very subjective, and who can guarantee that a huge collector will not become a spectacular landscape, and the question of cost cannot be short-sighted. Money and space spent can be exchanged over time. Visual pollution is very subjective, and who can guarantee that a huge collector will not become a spectacular landscape, and the question of cost cannot be short-sighted. Money and space spent can be exchanged over time.
Think about it in a few years, when all non-renewable energy sources are exhausted. At that point, solar energy will be extremely valuable. As for the problem of poor stability, it is a fact. no one can changer, just like farmers live their lives according to the face of God. The relationship between man and nature is not like that. The birth and death of all things have their own reasons. So this is something that humans cannot change. , the use of solar energy is imperative. Think about it: in a few years, all non-renewable energy will be exhausted. At that time, solar energy will be extremely valuable. As for the problem of poor stability, this is a fact that no one can change. see God The relationship between man and nature is not like that. The birth and death of all things have their own reasons. This is something humans cannot change. Therefore, the use of solar energy is imperative.