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International policies to protect the healthy operation of

Chinese solar water heater business to be more and better international, macro government level should be \"shot.\" Rely on the rigid laws of the market regulation and government constraints simultaneously, to protect China\\ s solar water heater industry, international health run.

At present, there are at least about 3,000 solar energy producers, and companies manufacturing solar water heaters at least 2000.

Today, solar water heater industry\\ s first mandatory national standard \" system efficiency of limited value and energy efficiency rating\" standard will be officially released with a matching \"domestic energy efficiency labeling rules\" also \"will be the fastest at the end of the official publicity. \"

With worldwide energy shortage situation deteriorating, the world in an unprecedented adjustment of the development of solar, wind and other renewable energy resources, the introduction of a wide range of policy measures to encourage and promote renewable energy industry to accelerate development . Although China is the world\\ s largest solar water heater state ownership, but ownership per capita in Israel are still far behind other countries, the Chinese market has become an international market is an integral and important part.

Maturity from the consumer point of view, Europe remains the largest consumer of solar water heaters, but the United States, Canada, Mexico, represented by the North American market, with South Africa as the representative of the African market, to Turkey, Syria and other Middle Eastern countries represented in the Middle East market is booming.

Application systems from the product point of view, to Europe, Australia and other developed regions, represented as the product of its own awareness of solar water heaters are more mature and use, coupled with its own characteristics and construction spending habits, mostly confined system products, and as the Middle East, South Africa, India and other regions of China, demand for products closer to market conditions, mainly in non-pressure systems.

The competitiveness of the product itself from the point of view, vacuum products in some mature markets, because of its flat products in the winter compared to the superior performance, and is positioned as a high-end products, but in some countries and regions, the vacuum tube products clearly been \"ill-treatment \"for flat products of the\" second-rate substitute \", of course, and some of our small company spirit of\" making a point also earn \"business philosophy and shoddy product-related.

European flat plate collector is still dominated the market, or a tube supplement products, but part of the market has shown its own advantages and with the performance of the price advantage in China.

As the world\\ s different countries and regions of the solar water heater for consumers with different consumption habits, but also because different parts of the water quality, water supply in different ways, different structures, different national standards and customs of different cultures, etc., forming the world\\ s countries many solar water heater products personalized needs. If you can meet the demand of these differences, we must have strong technical support and the ability of independent innovation.

Chinese solar water heater business to be more and better international, macro government level should be \"shot.\" Rely on the rigid laws of the market regulation and government constraints simultaneously, to protect China\\ s solar water heater industry, international health run. Government should introduce policies to support the promotion of the internationalization of China\\ s solar water heater industry, the rapid development. Many countries in the world of consumer products in the use of solar water heaters have subsidies, such as the maximum subsidy of 60% in Germany, the UK system, subsidies for each ? 500, the Austrian government subsidies for solar water heating systems for each home € 2,000 and so on. At present, China is no preferential use of solar thermal. The state should develop renewable energy from the perspective, to take appropriate measures to encourage and support solar water heater business to carry out technical R & D and product upgrading, increasing production and consumption of enthusiasm. Economic integration in the global market environment, the government should first protect the domestic solar energy solar energy enterprises and foreign enterprises in the same starting line, there is a fair and equitable environment for development, not in terms of competition one step short.

Stainless steel water tank in the flat in the application of solar water heaters

When the sun shines through the glass cover plate absorber on the board, most of the absorption of solar radiation absorbed by the body, into heat energy, and transmitted to the fluid channel of the working fluid. By natural circulation or forced circulation, while the stainless steel water tank heating.

Flat solar applications in buildings

China solar energy water heater market, an absolute advantage in the current vacuum tube water heater is an indisputable fact, but also extremely strong development momentum, the outlook is even more charming. But I can not be ignored in recent years, flat panel heater, becoming the highlight of the show, the new darling of the domestic users, the mainstream international market, and was even some experts and scholars believe that the future direction of development of solar water heaters. If I were complacent in the size and level of vacuum tube water heater, rather than to study carefully the advantages of flat panel solar water heater and development, it is impossible to look at long-term and seize the future, to master the initiative to enter the international high-end market.

First, the basic structure of flat panel solar water heater

Flat-plate solar water heater is mainly flat-plate collector, storage tanks, pipes, brackets and fittings and other components. Flat-plate collector is a key component of flat-panel water heater, the heater thermal performance is a measure of the level of an important indicator of good or bad. Include coated with selective absorbing coating of the absorber plate, transparent material cover, insulation and shell four major sections. When the sun shines through the glass cover plate absorber on the board, most of the absorption of solar radiation absorbed by the body, into heat energy, and transmitted to the fluid channel of the working fluid. By natural circulation or forced circulation, while the stainless steel water tank heating.

Heat-absorbing plate information abroad basically copper and stainless steel, the country has a lot of use of copper, aluminum, steel, galvanized sheet, poor water quality in coastal areas, you can use plastic or glass instead. Because the metal surface of high reflectivity, low absorption, in order to enhance the absorption, it is necessary in the metal surface coating that is heat-absorbing plate preparation. According to different preparation process, the coating can be divided into the plating coating, electrochemical conversion coating, vacuum coating and the coating of the coating are four main forms. Because the collector is surrounded by air, so when the collector absorber plate of solar radiation in the transformation of heat energy to water, also the heat loss to the surrounding environment, which makes solar radiation energy is converted into water can not be all the heat. In order to reduce this energy loss, heat-absorbing panels installed above the transparent material cover, so rather than cover through far-infrared through visible light, thus reducing energy loss, to more effectively improve the heat-absorbing plate and the water temperature. High-quality translucent material cover on the water heater\\ s efficiency and life have a significant impact.

Cover material used at home and abroad mainly ordinary plate glass, tempered glass and glass steel, which is still the most widely used glass. The sides and bottom of the absorber plate placed insulation materials, to reduce the collector heat loss to the surrounding environment, to improve the collector efficiency. Commonly used insulation materials are rock wool, mineral wool, polystyrene and polyurethane, etc. Polystyrene will shrink at higher temperatures, so use it as insulation materials, often in the heat-absorbing plate and put a thin layer between the first rock wool or mineral wool. In order to heat-absorbing plate, light cover and insulation to form a whole, and to maintain a certain degree of stiffness and strength is easy to install, need to have a more solid appearance of the shell, usually with aluminum, steel, plastic, glass, etc. made . In addition, there are flat panel solar water heater tank insulation, brackets, pipe fittings and other structural elements most.

Stainless steel flat panel solar water tank

Second, the development of flat panel solar water heater

Flat panel solar water heater in the country has experienced a \"U-shaped process, a new starting point now gradually gaining ground, experts, scholars and entrepreneurs attracted attention. According to the data show that in 1997 China\\ s annual production of solar water heaters 3.5 million square meters, of which about 45% of flat panel solar water heater vacuum tube water heater accounts for about 30% of the flat plate solar water heaters in China in 2001 the proportion dropped to 26.3% while the vacuum tube water heater up to 63.2% as of now, after nearly 10 years continued to decline, State share of flat panel solar water heater will yield only about 90% of the However, the international market, flat panel solar water heater, but always the dominant product, foreign (such as Japan, USA, etc.) more than 90% of solar hot water systems use flat type solar collectors, even in very cold winter in Denmark, Sweden and other Nordic countries without cases.

State authorities on the development of global solar water heater for a statistical analysis. By statistics in Europe, America, Oceania and Asia, 21 countries in 433 solar energy companies, with flat panel solar water heater 401, accounting for 92.61% total number of enterprises with 12 s, accounting for 2.77% of total number of enterprises simple solar water heater 20, accounting for 4.62% of total enterprises Clearly, foreign applications of solar water heaters, flat panel solar water heater production and trading of other products is far greater than the number of types of enterprises. With the promotion and popularization of new energy, and technological progress and development, the country flat panel solar water heater technology and product performance, quality is also improved from time to time, and in the integration of multiple aspects of the development of a unique performance advantages. Project of the Beijing 2008 Olympic Games, \"Olympic Village\" large-scale solar hot water system tender to select the German production of flat plate solar collectors, so that our vacuum tube have to reflect on your breath.

March 6, the sixth Chinese solar brand product exposition, Haier successful Australian ten thousand square meters of solar flat-plate collector to become the largest single news arouses envy. Haier Group, the introduction of advanced flat-plate collector from Germany technology, developed for the Chinese market, high-temperature flat plate solar collectors, solar panel to solve the victory of insulation, sealing and other industry problems. Sun, rain, Aucma and other domestic brands have also invested plate solar water heater project. After a solar water heater industry and the joint efforts of the construction industry, the country is flat solar water heater from the bottom to a new stage of development.

Third, the characteristics of the advantages of flat panel solar water heater

Flat panel solar water heater after decades of development, technology has become more mature and complete, and have the other types do not have the advantages of solar features.

One particularly suitable for integration with the building requirements. Flat plate solar water heater because of its structural characteristics, building integrated solar applications, flexible free form structure, design, shape or size constraints are not easy to achieve with a combination of building components. Combined with its collector plate of metal, wire knot can be easily used, welding and other connections for the installation, maintenance and use of provided lunch.

Second, high thermal efficiency. Because the vacuum tube solar collector is formed by a number of vacuum tubes there is a gap between the pipe was too much sunlight, there is a partial solar collectors are not accepted. Flat plate solar collectors is a continuous plane, the entire collector surface can receive sunlight. Therefore, the same area and sunlight intensity lighting, flat panel solar water heater is generally higher than the daily average efficiency vacuum tube solar water heater efficiency of 6% on average.

Third, the pressure with good performance. As the flat plate solar collector absorbs heat from the collector made of metal and stainless steel holding tank connections are metal parts, therefore, acceptable from the water circulating pump and the pressure.

Currently, the country is generally a centralized water supply systems, water pressure is high, which requires out of hot water from solar water heaters have a certain pressure, thus, reducing the water heater outlet and the pressure difference between outlet for user convenience and comfort. Fourth, the formation of large system performance and stability. For some large places such as hotels, swimming pool, factories and other places, the use of solar water heaters, they often need a lot of blocks composed of large-scale solar collector water supply system. If the use of flat plate solar collectors, the collector and the metal connection between the systems, and vacuum tube solar water heater, rather than as connected with the rubber parts, we can ensure the stability of the entire system.

Therefore, the establishment of large-scale s, it is often the use of flat plate solar collectors. In addition, the structure of flat-panel solar water heater is simple, convenient and easy processing of large-scale production, but also makes it has a low manufacturing capital, provinces and installation costs and long service life. Of course, there are flat plate solar collector heat loss and high antifreeze and other issues, also need to be resolved through further technological innovation. In order to actively participate in international competition, to develop the domestic high-end market, flat panel solar water heater must attach importance to research and development of a more open mind, improve our level of solar thermal technology and international level