Let's be honest: solar water heaters work great. As long as there is sunshine, there is hot water, which is also very practical for washing dishes in winter. When there is no sun, you can also plug in the electricity to boil the water.
In winter, it is no problem if one or two people take a bath every day. But if there are too many people swimming, there won't be enough water. If everyone rinses casually, there can be many personal baths. In summer, hot water is unlimited.
Compared with gas water heaters, the disadvantages are: Solar water heaters, like electric water heaters, have a certain water storage limit. They can't take a bath in winter like a gas water heater, and you can. wash it for as long as you want.
Advantages and disadvantages of solar energy applications:
1. Avantages
(1) Universal: The sun shines on the earth and there are no geographical restrictions. , no matter land or sea, no matter Mountains or islands are everywhere and can be directly developed and used without the need for mining and 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 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 the current rate of nuclear energy generated by the sun, hydrogen storage is sufficient forrer 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.
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.
(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.
(3) Low efficiency and high cost: At the current level of development of solar energy utilization, some aspects are theoretically feasible and technically mature. ThisHowever, 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 limited mainly by economic reasons.