The rate of use of solar energy by green plants is ().
A.0.045
B.0.012
C. 0.17
D.0.1
Correct answer: B
Although Solar energy is environmentally friendly, energy efficient, but has many disadvantages during use, which makes rural people reluctant to install solar panels.
1. Low solar energy utilization rate
Solar energy must absorb heat from the sun to heat water. the water heated by solar energy will be heated for a day, the temperature can reach 60 or 70 degrees, which is quite enough for daily washing. However, on rainy days, especially after winter, solar energy has no room to play.
My house used solar energy. But in winter, when we need a lot ofhot water, it is difficult to heat water using solar energy. even after a day of heating, I sometimes feel that the water temperature is not enough even when washing my face and hair, let alone taking a shower.
If you want to take a bath, you can only wait for the sun to shine to heat the solar water. When it is snowing or minus ten degrees, solar energy cannot be used at all. and the water must be airtight to avoid being heated. The solar tubes were frozen, and the solar energy at this time completely became a display and could only be used until next spring.
2. Solar maintenance is expensive
Since solar water uses tap water or well water, there will be a thick layer of scale in the pipe after a period of use. If the scale is not cleaned, the temperature of theThe water in the solar panel will drop and cleaning it will cost a lot of money.
In addition, solar tubes are easily damaged by freezing in winter. Not only is it difficult to find professionals to repair them, but it also requires labor costs. plus the cost of replacing the solar tubes. It often costs several hundred. Such a high price is difficult for many rural populations to accept.
3. Diversification of water heaters
There are many varieties of water heaters on the market with the popularity and spread of alternative products. Bulky solar and compact electric water heaters and gas water heaters are more popular among rural populations.
Especially in rural areas, natural gas has been installed in households. It is inexpensive to use natural gas water heaters and theWater temperature may vary. be adjusted according to your own needs, 24 hours a day there will be hot water, so you no longer have to worry about not being able to take a shower when it's cold.