Tag Archives: solar water heater china

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

Qingdao lightning frequently blocks of

    Reporters from the center of Qingdao Weather Bureau learned mine, the center of the city\\ s residential area recently, explosive mine sites and industrial and mining facilities for the inspection, the inspection process found that, compared with the mining industry and residential area there more security risks, lack of public awareness of lightning safety, some residential areas there are security risks.

Understanding of the situation, according to Mine Center, the city\\ s residential property more than 70% of lightning conditions up to standard requirements, there is illegal use of s, sun room and other facilities situation, BAN with lightning often useless.

Problems

Do not regularly check the state of disrepair

Bureau of Meteorology Mine Center, the official told reporters that they began in March of this year mine inspection, as there are already more than 400 units were examined, results showed that about one percent of which is not standard. \"Fortunately, mining enterprises and flammable and explosive places, residential area of ??the mine situation is not optimistic.\"

Inspection found that many of the urban area, lightning protection devices dilapidated unit, not for regular testing, equipment design, construction, non-standard, testing is not timely rectification of problems, some even refused to accept the test.

\"In addition to the city of Shenyang, a district is unified by the developer to install and allow us to produce drawings, the solar water heaters use less qualified.\" The official said.

Although most of the new district are equipped with lightning protection, but rarely put into use after the application for the inspection, some of the lightning protection device due to external or vandalism, lightning did not even come into effect. \"Residential property was told that money, they quit shaking his head.\"

It is understood that the cost of a mine detection, as the building body of the decision, a single building just a few hundred dollars to the body.

Many people always feel that they are distant lightning across, things just have to encounter more serious, it is reported, in a building inspection, Shandong Road, Building property has not cooperating, until last year suffered a lightning strike after lightning to find this center, set up their own requirements for lightning protection facilities.

Reporters visited

Solar water heaters with higher than lightning

Yesterday afternoon, the reporter first came Yan\\ er Island Road and East Road at the junction of a residential area to see, the roof area is only a few scattered solar water heater. Although the slope-style buildings, but reporters saw in the distance, the water heater on the roof height, or significantly more than the distribution of lightning in the roof with a height of four weeks. And east-west highway in the Rehe junction cell, the solar water heater on the roof can be seen everywhere, are standing high above the roof, higher than the lightning with a full half-meter.

The same situation also occurs in the four streams, No. 11, Road 221 Road No. 31, roof and Cing, almost every residential area of ??solar water heater, a roof over their height with lightning.

Experts warn

Facilities equal to the security of Disorder \"drawing lightning.\"

Lightning center of the experts told reporters, solar water heater has become quite common, but the public the wrong installation method will bring a great risk. Water heater installation height than the lightning protection zone, with equal protection from the lightning, if not any installed water heater next to the lightning rod, lightning strikes, lightning will follow the pipes into the room, who will be taking a bath or even hit the dead and damaged . For signal control line water heater, lightning induced electromagnetic pulse will line the road, destroying the solar water heater control system, and even wounded personnel.

Staff said, not the roof can not install solar water heaters and other devices, but must pay attention when installing these devices is more than lightning with a high degree, if more than lightning with a high degree, it is necessary to install a solar water heater next to the lightning rod, and connect to grounding. If the installation of TV antenna on the roof, awnings and other devices, but also pay attention to whether they meet the lightning protection standards, if they doubt, consult the Mine Center.