The advantages of solar energy and environmental protection

2010-09-03

According to the comparative analysis on the general new energy resources like biomass, hydro, wind and solar energy, we come to a clear conclusion that solar energy generation has its unique advantages:

1. Photovoltaic power generation can reach up to10~20 times: Judging from the ratio between the energy a new power plant consumes and the power the plant generates within an operation cycle, that is, input-output ratio of the energy, we can see that the current photovoltaic power generation could reach 10 to 15 times, and in the area well exposed to the sunlight may reach 15-20 times. Among these, the biomass, hydro and wind energy resources are essential forms of certain forms and links of the solar energy conversion and transformation, originating from solar radiation in nature.

 

2、Photovoltaic power generation has its economic advantages: Viewing from the construction costs of the photovoltaic power plants, we find that the construction cost of one kilowatt may reach 7-10 thousand yuan around the year 2010 and compared to other types of renewable energy it has its own advantages, with the large-scale application of solar photovoltaic power generation and promotion, especially the increasing maturating of the the upstream industry and the crystalline silicon photovoltaic technology as well as the complex development and utilization of solar power of the platforms like the building roofs and outside walls.

 

3、The photoelectricity deposit accounts for as much as 96.64 percent of the total resources: Judging from the exploitable deposit and the figures generally received by scholars and experts, we find that there are 100 million kilowatts of biomass, 378 million kilowatts of hydropower, and 253 million kilowatts of wind power. However, just 1% of the resource can Generate up to 21 billion kilowatts of energy. According to the ratio, biomass accounts for only 0.46%, wind power 1.74%, and water 1.16% while photovoltaic takes up 96.64%.

 

4、It has near zero carbon emission and does not pollute the environment: According to carbon emissions from various power-generating approaches at prsent, excuding its upstream links: coal emits 275 grams, oil power 204 grams, natural gas 181 grams, and wind power 20 grams, while the solar PV is close to zero emission. In addition, the power generation process emits neither residue, waste, wastewater, or waste gas, nor noise or harmful substances, and it doesn't pollute the environment.

 

5、Its energy conversion has the least but the most direct links: In terms of the energy conversion routes of solar power generation, the solar radiation is directly converted into electrical energy, which is the most direct way with the least links among all the solar conversion of renewable energy resources. In general, in the process of energy flow among the whole ecological environment, as the conversion links increase and the chain elongates, the energy loss will present a geometric increase, and the operating costs of the entire system and instability will also be greatly increased. At present, crystalline silicon reaches a practical level of conversion efficiency, which remains 15-20%, while the current laboratory level has reached 35%.

 

6、It is the most economical, cleanest, and most environmentally friendly: from point of view on the resource conditions, especially land use, bio-energy and wind energy demand relatively harder conditions, but the conditions solar energy needs are very flexible and broad. If solar power takes up a land area of 1, the wind will be 8-10 the area of the solar energy takes up, and bio-energy even needs100 times. To the water and electricity, building a large dam often requires tens to hundreds of square kilometers of submerged land. In contrast, solar power does not take up more of additional land, The roof or walls may become a place of its application. In our country, we can also use our vast desert, through the construction of solar power in the desert base, directly reduce the direct solar radiation to the surface of the desert area, thus to reduce the surface temperature, and evaporation, and thereby make the plant survival and growth to a certain extent possible, secure and reduce the sand dunes, and also obtain a clean and renewable energy we need from the nature.

 

From the above we can see that photovoltaic generation is the most economical, cleanest, most environmentally friendly sustainable energy currently available to us.

 

 

Providing energy when most needed

 

In a hot summer day, because of the industrial load and air-conditioning use reaches its maximum, electricity demand peaks in the afternoon hours. A unique and popular feature of solar photovoltaic is that its shape has close relation to the electricity demand and the peak generating capacity appears in the hot summer afternoon hours. As part of the generating capacity, the large-scale solar power plants can reduce the overall cost of electricity during the peak period and the carbon emissions released from the power generation enterprises

 

Being Clean, renewable and sustainable

 

In addition to the limited resources, the traditional hydrocarbon fuels also have a negative impact on our environment, so the development of clean, renewable energy is very important. Solar PV provides a rich, clean and affordable renewable energy, and will not produce harmful greenhouse gases. As the sun is unlimited and free, once the photovoltaic panels are installed, they will continue to produce virtually free energy for decades.

 

Providing rapid deployment

 

Solar photovoltaic power generation has shown rapid growth in capacity. Because it is a distributed energy, solar photovoltaic energy can be deployed where most needed - eliminating the time or fees required in the construction of new transmission facilities. This is an immediate solution - to install solar panels, and then it immediately will start generating electricity.

 

Expanding at the lowest cost

 

As the solar panel manufacturing technology continues to advance, the production costs of solar photovoltaic panels will reduce, the construction costs of the solar panel factory will drop and the yields will increase.Other power sources are to face rising costs and the burden of infrastructure requirements in order to expand. This will undoubtedly make the diversified portfolio of solar energy own its clear advantages.