Solar water heaters entering the city still need policy support

According to the statistics of the air-conditioner refrigeration market, China's solar water heaters currently hold two-thirds of the world's total, and annual production accounts for 70% of the world's total production. - 80% is a world leader in the manufacture and use of solar water heaters.

At present, there are more than 2,800 solar water heater manufacturers in China compete. Except for a few state-owned enterprises such as Tsinghua Sunshine, the rest are private enterprises. The industry basically relies on private investment to grow and develop, and the country has almost no subsidies. China's solar water heater industry has two outstanding advantages. First, the industry development has been market-oriented since its inception, shaping a number of well-known brands, such as Huang Ming, Tsinghua Sunshine, Norit, Sun Rain, etc.; second, having complete Advanced technology with independent intellectual property rights, for example, vacuum tube heat collection technology.

In 2009, the output of solar water heaters in China totaled 42 million square meters, and the number of possessions reached 145 million square meters. According to the solar water heater, the annual calorific power per square meter is equivalent to 417 kWh, and the 145 million square meters of possession means that it can replace 604.65. Billion kWh of electricity. In 2009, the total power generation in the country was 3.6 trillion kWh, of which wind power was 27 billion kWh. Contrastingly, solar water heaters weigh heavily in the renewable energy field in China. However, the government has insufficient support for the use of solar energy in achieving the goal of 15% of clean energy consumption in 2020 and developing renewable energy.

After the world’s major developed countries realized industrialization, their industrial energy consumption continued to decrease, and the energy consumption of buildings and transportation continued to increase. In the future, after China's industrialization and urbanization, energy consumption will gradually shift to the construction and transportation sectors. If it is not possible to use energy in a comprehensive and scientific manner, the contradiction between life energy and industrial and agricultural energy competition will most likely occur. We must not only improve our living standards, but also consume large amounts of fossil fuels and rely too much on energy imports. This can cause very serious problems and even cause international disputes.

Low-temperature heat utilization is a very important part of reducing building energy consumption, such as heating, cooling, domestic hot water, etc. These can all be solved using solar thermal energy, which is of great significance for energy conservation and consumption reduction. The government should pay great attention to the application of solar thermal energy from the energy strategy, especially the development of low-temperature heat utilization, improve its technical content, and promote the integration of building energy efficiency.

Although the "Renewable Energy Law" stipulates that the State encourages units and individuals to use solar water heaters. However, at present, China does not impose solar water heaters on the policy. Because of the poor living conditions, lack of resources and concentration of population, Israel and Japan have formulated many energy conservation policies and developed energy-saving technologies based on their national conditions. Israel was the first country to enact regulations for the mandatory installation of solar water heaters.

China's solar thermal utilization technology is relatively mature, and the product cost is low. It is entirely possible to achieve building energy conservation through mandatory installation policies. The implementation of building energy conservation must start with the government and play a demonstration role. If the government does not participate, the company and the people alone will have poor results.

At present, in China's big cities such as Beijing and Shanghai, there are too many problems left over from the history of urban construction. It is very difficult to carry out energy-saving reconstruction of buildings. However, some newly built small and medium-sized cities must include building energy conservation in planning. For example, in Dezhou City, Shandong Province, known as Sun City, its new residential and public building solar water heater has reached 90%.

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