Wind hydropower generation

First of all, wind power, hydropower and photovoltaic power generation all belong to clean energy, but the efficiency of wind power and solar power generation is very low, and the efficiency of hydropower power generation is relatively high. If only from the perspective of environmental protection, personally think that wind power generation is more environmentally friendly.

Let's first understand the principle of wind power generation: use wind power to drive the windmill blades to rotate, and then increase the speed through the reducer to promote the generator to generate electricity. According to windmill technology, power generation can be started at a breeze speed of about three meters per second. The equipment needed for wind power generation is called a wind turbine. This kind of wind turbine can be divided into three parts: wind wheel (including tail rudder), generator and tower. (Large wind farms basically have no tail rudder, and generally only small ones (including domestic ones) will have tail rudder. )

The main pollution of wind power generation is:

1, visual pollution: under the condition of wind and sunshine, the sun shines on the rotating leaves, producing shaking shadows. The swaying shadow often makes people feel dizzy and upset, which affects their normal work and life. If wind turbines are arranged on expressways and both sides of expressways, rotating shadows and light reflection will affect the driver's sight, thus affecting driving safety.

2. Noise pollution: the construction noise in the wind power construction stage and the noise of the fan itself in the operation stage.

Hydropower has more disadvantages:

1. Ecological damage: the soil erosion under the dam is intensified, the river changes and its impact on animals and plants. ?

2. Resettlement needs dams, and investment in infrastructure construction is large.

3. The fertile alluvial soil in the downstream is reduced due to scouring.

4. The huge dam that needs to flood a large range of upstream areas will destroy biodiversity, productive lowlands, forests, wetlands and grasslands along river valleys. Reservoirs built for hydropower generation will cause habitat fragmentation in surrounding areas, leading to soil erosion deterioration.

5. Physical and chemical properties: The physical and chemical properties of the water entering and leaving the reservoir have changed, such as color and smell, and the density, temperature and even solubility of the water in each layer of the reservoir are different. The deep water temperature is low, and the organic matter at the bottom of sedimentary reservoir can not be fully oxidized, and it is in an anaerobic decomposition state, and the carbon dioxide content in water body is obviously increased.

6, affect climate change, easy to form' extreme weather'

7, affect the groundwater circulation, will cause the downstream lakes to dry up and seawater backflow.

To sum up, I personally think that wind power generation is more environmentally friendly.