Zhejiang Huayide: Solar thermal utilization is a sunrise industry

Mr. Zhou from Zhejiang Huayide Solar Technology Co., Ltd. held an exclusive interview with Mr. Zhou, deputy general manager of Zhejiang Huayide Solar Technology Co., Ltd. at the seminar on affordable housing and solar thermal utilization. He said that he is very optimistic about the application of solar thermal utilization products in the field of affordable housing, and the prospects are very considerable. The following is a textual record of the interview. The prospect of solar thermal utilization products in the field of affordable housing and building energy conservation is very broad [Reporter] Do you think there will be prospects for the use of solar thermal utilization products in the field of affordable housing? [Mr. Zhou] should have great potential. [Reporter] You think its prospects are very broad. Why do you think so? [Mr. Zhou] It is not only the prospect of a large number of affordable housing, but the prospect of this is very good for the entire building energy saving. But now, on some levels, I still don't realize it, or do it with the mechanical, step-by-step tradition. Talking about innovation and innovation in this atmosphere? The resistance is still very big. The construction industry is a very traditional industry, and the application of new products in construction is very difficult. The development of the solar thermal utilization industry faces institutional obstacles. Solar energy is an available and renewable energy source that is inexhaustible. Our country has institutional obstacles in the management of the solar thermal utilization industry. As a solar thermal utilization company, it is very difficult. We have to talk and do things with the Ministry of Housing and Construction in the Ministry of Housing and Construction. However, the Solar Thermal Utilization Committee is affiliated with the Ministry of Agriculture, and we must respect the guidance of the Solar Thermal Utilization Committee. Solar thermal utilization is doing very well in the rural market. why? The market in rural China is too big. How many industries in China are now in the first place in the world? The solar thermal utilization industry can count as one. Compared with solar photovoltaic companies, the solar thermal utilization industry is still very small. Due to the country's attention and support, how many preferential policies does the state give to PV companies? How much did you give? In China, A-shares, B-shares, US listings, and Hong Kong-listed solar photovoltaic companies. However, as far as I know, there is still no professional solar thermal utilization company listed. Although some large listed companies also engage in solar thermal utilization business, this is only a small piece within their enterprise. I think there may be many institutional problems in this area that need to be resolved. There is a breakthrough in the protection of the housing, the entire construction industry has a breakthrough [Reporter] However, will it increase the cost after using solar energy? [Mr. Zhou] The affordable housing is built for the people who are relatively economically poor. These groups also need heating, he also needs air conditioning, and he also needs hot water to bathe. These needs are normal. If there is a product that can be used at a low cost in a social security room, can it be used in a building? This question is meaningless. For our solar thermal utilization companies, providing products for the protection of the housing is a rare new opportunity for us to innovate in technology and product innovation. In fact, if there is a breakthrough in the security room, solar thermal utilization is a breakthrough in the entire construction industry. For domestic hot water, whether you are a commercial housing or a social housing, the demand is the same. Heating and cooling currently have excessive energy consumption, and solar thermal utilization technology can solve heating problems a lot. Recently, the demand in the South is strong. There are central heating in the north, special institutions, special boiler rooms, and special heating pipes to heat the thousands of people in the winter. If there is a heating failure, it will become a major livelihood issue, so all levels of government attach great importance. But now there are few viable options for heating in the south, and the people in the south are calling for it. The number of days in the south where the annual temperature is below 10 °C is no less than in the north. It is hard to live when the temperature is below 10 °C. In the south, not only is it cold outside, but the room is cold, and even the bed is cold enough. National standards stipulate that indoor heating will bring the indoor temperature to 16 °C, while in summer, the indoor temperature will reach 26 °C. Both of these things can be achieved with solar thermal utilization products. For winter heating, as long as hot water of not less than 20 ° C can be supplied continuously and the heat is released into the room through the end (such as a buried radiant tube or fan coil), the room will be very warm. There is no problem with reaching the national standard of 16 °C. However, the actual situation is to achieve this 16 ° C standard. There are thousands of large boilers in the north of China to burn water to above 85 ° C to pass the long heating pipeline. It is said that there are intermediate stations in some places. . Originally only need 20 ° C water, but must be burned to 85 ° C with a large boiler. In fact, this is excessive use of energy. It has not been said that the chimney discharges pollutants to the environment. But heating is already a huge industry. If you replace him with new technology, how many people will change? This may also be a political issue. Let's talk about summer air conditioning. It is only necessary to continuously supply cold water of no more than 10 °C to the indoors, and to release the cold into the room through the end (such as a buried radiant tube or a fan coil), and the national standard of 26 ° C is also a problem. Nowadays, in order to produce these cold waters with a temperature not higher than 10 °C, public buildings are generally equipped with a large central air-conditioning system, and the roof is usually equipped with a huge cooling tower, and the power consumption is very large. In general civil buildings (including residential buildings), all buildings are equipped with outdoor units with split air conditioners. In China, there are outdoor machines everywhere. In fact, many foreign countries, especially developed countries, are not allowed to hang anything outside the building. Our national outdoor machines can be installed casually, which is the problem. why? I think this is the result of a small fuss in the air-conditioning industry and the HVAC industry. If solar thermal utilization technology is used, this problem of excessive energy consumption can be solved. There are already mature products in this area in foreign countries, and Spain, Denmark, Israel and other countries have successful cases of film application. At present, there are many solar thermal utilization enterprises, colleges and universities and academies systems in China that are developing research-related new technologies. [ 】 What method is used to make water of this temperature? [Mr. Zhou] Solar energy can be solved completely. It can be solved without medium temperature, high temperature and low temperature solar energy. [] What about the cost? [Mr. Zhou] Actually, I came to the meeting of the social security room this time. We are here to listen. We believe that the protection room only needs to have a water pipe to enter. This water pipe supplies hot water in winter, and it supplies cold water in summer. It is equipped with a fan port, which is equivalent to an air-conditioned indoor unit. The temperature of the room is exactly the same as that of air conditioning and heating. The users of the affordable housing do not have to bear the cost of making cold water and hot water equipment. This will greatly reduce the cost for the security room users. The promotion of solar energy, there are different programs in different places [Reporter] Will solar energy have strict seasons and regional requirements? [Mr. Zhou] Yes. [Reporter] In this case, the possibility of promotion in the country is not big? [Mr. Zhou] There are different options for using solar thermal products in different places, because the time of light irradiation is different, and its intensity is different. For solar thermal utilization products, the heat collection area is different in different regions. The same 100 liters of hot water, in the south may be 1m2 of heat collection area, to Beijing to 1.4m2. The key technology of the solar water heating system is the heat collecting technology. The higher the heat collecting efficiency, the smaller the area occupied by the collector and the higher the level of the product. This is the technical competition between enterprises in the solar thermal utilization industry, but purely speaking, the efficiency is not enough, but also how to integrate with the building. Flat-panel solar energy is the direction of the future market [Mr. Zhou] Once the requirements are fully integrated with the building, our solar industry's products using vacuum tube heat collection may be affected. why? Vacuum tubes account for more than 80% of our country. Vacuum tube is a very difficult product and building integration, and the Ministry of Housing and Construction has a special file to limit installation. Vacuum tube collectors on the roof will damage the roof. Because the glass tube is fragile, it will fall off when a firecracker is placed on the balcony or wall. As long as one tube breaks the whole system, it is useless. Why are vacuum tubes so popular in our country? It is mainly popularized in the rural market. It does not matter if it is installed on the roof of a farmer, but it will not work in a big city. In the future, solar thermal utilization will be combined with the development of buildings, and we may have to reshuffle the industry. Even some famous companies in the industry, if there is only a vacuum tube, he may not have a foothold. Vacuum tube products are mostly used in rural areas. Which high-rise buildings in Beijing and Shanghai do you use? I have not seen it. [Reporter] Will there be no similar security incidents in rural areas? [Mr. Zhou] The countryside is relatively simple, the house is not so high, and the roof is exclusive. Therefore, the next step of solar thermal utilization products into the city, vacuum tubes must be eliminated, the flat is the direction. At today's meeting, Guangdong Five Star Company introduced the flat panel collector. The meeting will also arrange to see the engineering case of the flat-panel solar water heating system in Beijing tomorrow. More than 95% of foreign solar thermal utilization industries are flat plates. Vacuum tubes are not used and vacuum tubes are rejected because of the unsafe factors. We know that foreign countries pay attention to this aspect. He is absolutely not used for unsafe things. It is not necessary to use high technical content. [Reporter] What is the strength of your tablet promotion now? [Mr. Zhou] More than 95% of the flat panel collectors in the industry are now moved from abroad, without their own intellectual property rights. This type of collector is usually welded together with copper tubes and aluminum foil, then piece by piece, and then has a heat-insulated outer casing. If there is a difference, the main difference is the welding technique and the surface coating of the aluminum foil. We are all flat-panel and different from the average company. We are a whole piece of aluminum plate, using a special process to make the aluminum plate have a lot of different flow pipes, of course, there is also a beautiful appearance of the insulation shell. Compared with other manufacturers' products, the principle of collecting heat is the same, and the water storage tank is similar. However, our collectors and water tanks have their own patents, which means they have independent intellectual property rights. Our board has a lot of functions, because it is a board, it can bring a lot of convenience to the designer. Not long ago, we collaborated with the Housing and Urban-Rural Development Department's Housing Industrialization Promotion Center to compile a "Frame-type Solar Water Heating System Architectural Design Atlas" and the corresponding "Platform Solar Water Heating System Construction Engineering Technical Guide". The products recommended in the Atlas are based on our Huade Solar Thermal Utilization Products. After the publication of the Atlas, you will need your media to help promote it. In this atlas, the installation and use of flat-panel solar water heating systems in different buildings is explained in more detail. Its installation range is very flexible, and some places can be placed upright. If the architectural design is better in advance, we are now striving to keep a good position in the architectural design. In this way, it is easy to realize the three unification of the solar water heating system (ie, unified design, unified installation, unified acceptance). Hua Yide invented a new energy system - "Space Energy" [Reporter] What if it is cloudy or rainy? [Mr. Zhou] All solar water heaters cannot work without the sun, and an auxiliary heating system must be added. Nowadays, the lower cost electric heater is mainly used because it is directly heated to water, so it is very unsafe. This kind of water heater is actually a very unsafe electric heating water heater without the sun. Some of our products from Huayde will be de-heated and heat pump technology will be used as an auxiliary heat source for solar water heating systems. Do you know the air source water heater? This is a very good product. We, Huade, combine air and solar energy. The air source has a heat pump, something like a refrigerator compressor. We use this thing as an auxiliary heat source. It has a heating system. The two systems are combined to form a new solar water heating system. We call space energy, sun plus air, space energy. This is our Huade. Invented by myself. This system uses solar energy when there is a sun, and air energy when there is no sun, which is more energy efficient than an air source hot water system. Our products can be one-family, but more suitable for concentration.

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