Since the introduction of the “531” New Deal, photovoltaic people have been through the most tormented period of time. Resentment, complaints, accusations, disappointments, and of course indifference and optimism, all kinds of emotions pervade the practitioners. At the enterprise and industry level, the pressure and impact of policy changes have accelerated. “531” brings severe pains and reflections. This change will surely become a heavy stroke in the development process of the photovoltaic industry, which will profoundly affect the future trend.
China’s photovoltaic market can be described in two words: bright sun, violent storms, and hope for the future is still the former. Mencius said: When heaven sends a great responsibility to a man, he must first suffer his will and work his muscles and bones. This kind of “hardening” is both in thought and action. Faced with the current situation, what is the way out for photovoltaics? How to work together to get through the last mile before affordable Internet access? Turn around and leave, or take advantage of the momentum to break through? These questions are constantly questioning photovoltaic practitioners.
Can “photovoltaic +” heating become a new way for photovoltaics?
Many photovoltaic companies have begun to turn their attention to the big cake of “coal-to-electricity”, which is also an important path for the photovoltaic industry to diversify. In most areas of northern my country, coal is mainly used for heating in winter. In recent years, the pollution problem of coal burning in winter has become more and more prominent. The low utilization efficiency of scattered coal and the low-altitude emission of pollutants have become important causes of fog and haze weather in winter. Since 2015, the whole country has vigorously controlled air pollution, and traditional heating methods are gradually being replaced by clean energy.
Starting this year, clean heating methods such as “coal-to-electricity” and “coal-to-gas” have been promoted nationwide. From the actual effect of coal-to-gas conversion, there are congenital defects such as many limitations, great difficulty, high cost, and insufficient gas source. And the new Model of “photovoltaic + electric heating” that uses solar energy and electric heating for heating came into being! At present, the complete set of equipment of “photovoltaic power station + nano-electric boiler” built by Shandong Lvrong Factory has become the first pilot in Linyi area. People report that the trial has achieved good results.
The “photovoltaic + electric heating” model that is so popular in various places must have its own uniqueness.
The “photovoltaic + heating” system realizes the adaptive combination of photovoltaic power generation, nano-electric boiler and smart IoT management platform. Photovoltaic power plants convert solar energy into electric energy to provide electricity for nano-electric boilers; nano-electric boilers perform heating cycles in the form of radiators or floor heating; smart IoT management platforms realize intelligent control and improve energy efficiency. In the non-heating season, the electricity generated by the photovoltaic power station can be sold to the national grid to obtain additional income and truly achieve the dual goals of clean heating and energy investment.
The system has two major functions, namely heating in winter and green electricity production throughout the year. Compared with traditional heating methods, the “photovoltaic + electric heating” system has lower operating costs, and can even achieve heating without spending money, which is highly economical. The thermal efficiency of the nano-electric boiler system is very high, up to 99%, which is much higher than that of ordinary electric heating and gas heating. The system does not require huge investment in infrastructure construction, and the surplus electricity is connected to the grid and is self-sufficient, which can effectively relieve the pressure on the grid.
“Judging from the operation of the project, it has mature conditions for large-scale promotion.” The person in charge of the R&D Department of Green Finance Company introduced, “This new heating model is very suitable for the vast rural areas and independent heating shopping malls, schools, factories, hotels and other places When the photovoltaic power generation is higher than the electric heating load, users can sell the excess power to the national grid. When the solar power generation is lower than the electric heating load, the grid power can be used as a supplement, which is very cost-effective.”
Compared with other heating methods such as coal-to-gas and coal-to-electricity heating, “photovoltaic + electric heating” has many advantages such as cleanliness and pollution-free, high utilization efficiency, less difficulty in reconstruction and construction, and low cost of use, and this new heating mode can be constructed , sustainable, replicable, and popularizable. Judging from the trial operation of the Green Finance Factory project, the effect is very satisfactory.
We can calculate an account: take Shandong as an example, the application of nano-electric boiler system heating, 100O residential, a heating season of 4 months, the cost of 2400-3500 yuan, an average of 24-35 yuan / O, compared with municipal heating Basically the same (municipal heating 23-35 yuan / O). The actual heating area of users who use air-conditioning heating is generally 30-50O for one or two rooms. Here, the actual heating area is 50O. The heating cost is 3500-7000 yuan, an average of 70-140 yuan/O, a heating season, nanometer Electric boilers can effectively save costs by 30%-50%. After adding “photovoltaic +”, heating and electricity consumption can basically be solved.
Green Rong Factory’s “Photovoltaic + Electric Heating” demonstration project is located in the exhibition hall on the first floor of the factory’s office building. It is equipped with a 5.5kw rooftop photovoltaic power station and a 6kw nano-electric boiler system as standard. In the case of using all the mains electricity, the cost of using a 6-kilowatt nano-electric boiler in a heating season (4 months) is about 1800-2600 yuan. After the photovoltaic power station is installed, more than 1,000 yuan of electricity can be saved during the day in a heating season. In the non-heating season, the power generation is more than 4,800 kWh, and the additional income from selling electricity is as high as 2,000 yuan.
The new energy model of ‘photovoltaic + electric heating’ has a promising future!