The high-tech industry may be far away from us. But have you ever thought that when you enjoy air conditioning during the hot summer months, electricity may have come from the sun you just cursed?
Solar energy is recognized as the last virgin land of global new energy. In Hubei, solar photovoltaic power generation is quietly starting. However, the current electricity cost of about 4 yuan/kWh is deterred.
How can we reduce the cost of solar photovoltaic power generation so that ordinary people or at least enterprises can afford it? Starting today, the newspaper launched a series of reports to show readers the status quo of photovoltaic power generation in our province and the promised future.
Imagine that with just one phone call, someone can install solar photovoltaic power generation equipment on your roof for free and connect to the national grid. After the power generation equipment installation company recovers the cost (around 8 years), the equipment belongs to you. At this time, your home becomes a "power station." Since the household's incessant power will be deployed on the Internet, you can even deploy it to the grid company. Charge electricity.
This is a real story in Germany. Although the status quo of Wuhan photovoltaic power generation is still far from this level, it does not hinder the ambition of the local government and enterprises.
Last week, the photovoltaic grid-connected power generation project of the exhibition hall of Wuhan New City Expo Center was evaluated by experts and its battery components laid area of ​​6,300 square meters. It is the largest building integrated photovoltaic power station with the largest battery area in the country.
Make full use of "stove" resources
"Photovoltaic power generation is the use of energy converters such as solar cells to convert light energy into electricity," said Chen Zhenghong, chief expert of the Hubei Meteorological Science and Technology Service Center, to the reporter.
As one of the major provinces for electricity use, Hubei’s social electricity consumption in 2008 exceeded 100 billion kwh, equivalent to an annual consumption of 400 million tons of standard coal. In the era of calling for a low-carbon economy, the significance of developing renewable energy sources is no longer required.
Since the first photovoltaic power generation project in Hubei Province was operated in 2006, the total installed capacity of the project that has been connected to the grid (connected to the unified power grid) has reached 4 MW. Every year, the electricity used in our province, in theory, has more than 3 million degrees from the sun.
Hubei is planning to build a huge industry for photovoltaic power generation. In the next few years, through the investment of 10 billion yuan in photovoltaic power stations, the entire industrial chain, from the production of solar cell silicon, to the installation of power generation equipment, will generate 100 billion yuan in output value.
It is reported that Wuhan, the total number of hours of sunshine is 1810 ~ 2100 hours, although only Gansu, Xinjiang and other regions, but better than Germany. Take the above Expo Center project as an example. After completion, the annual power generation will exceed 9.5 million kWh, equivalent to saving about 3354 tons of standard coal, which can solve 30% of the power consumption of Expo Center.
Provincial Development and Reform Commission officials said that in the short term, the use of new energy such as solar energy to completely replace coal is not realistic, "but in the most intense period of solar radiation can make full use of, reduce coal consumption, is the core meaning."
Why choose solar energy
At present, renewable energy power generation mainly includes hydropower, wind power, solar energy, biomass and nuclear power.
Comparing their respective advantages and disadvantages, the Hubei Energy Group analyzed the reporters. At present, the basic construction of hydropower projects in our province is completed, and wind power is limited by natural conditions. After rapid development of biomass, the prices of raw materials such as straw are rising. Solar and nuclear power should be Focus on the direction of development. “Nuclear power should be said to be the quickest project and its power generation cost is low.†Industry insiders frankly say, but nuclear power plant investment is huge. In the long run, a large amount of uranium is needed as a raw material. From 2002 to 2007, uranium prices were substantially increased. Soaring 17 times, "In the future, with the increase in demand, the source of raw materials and costs are worrying."
Because of this, according to Chen Zhenghong, most of Hubei is in the first and second solar energy available areas. At the same time, photovoltaic technology can be used in any place where power is needed. Regardless of spacecraft, power stations or home power, photovoltaic power is everywhere.
Give the building a "green coat"
The reporter understands that the current domestic photovoltaic power generation projects are divided into two types: an independent power station and solar photovoltaic building integration (the former installs battery modules independently in the desert and the latter installs components on the roof of the building, abbreviated as BIPV).
In the eyes of people in the industry, an independent power station has a land demand of more than 100 mu, which is not suitable for Hubei where there are a large number of people, and the choice of a combination with buildings is more economical and convenient.
Zhang Wenjian, vice president of Wuhan Rixin Technology, the construction party of photovoltaic power generation projects such as Wuhan Railway Station and Expo Center, believes that Hubei's solar energy resources are most concentrated from July to September, and the Hubei power has a tight summer period. Through the installation of solar power generation equipment on the roof of a building, the electricity generated firstly circulates within the building's internal network and replaces about 20% of the electricity, which is of great significance for alleviating local electricity shortages.
This view has also been recognized by the Provincial Development and Reform Commission. “According to our vision, BIPV is the main direction.†The person admitted that Hubei intends to cooperate with parking stations and rural vegetable greenhouse owners to install equipment in open spaces or on rooftops, or to install wind power and hydropower stations to form photovoltaics and hydropower. Complementary wind power, the use of all land resources to capture solar energy resources.
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