Schematic diagram and working principle of solar water heater. Nowadays, many families use solar water heaters. Because of the advantages of convenient installation and obvious energy-saving effect, solar water heaters have become the choice of many people. Let's share the schematic diagram and working principle of solar water heater.
Schematic diagram and working principle of solar water heater 1 1, heat absorption process
Vacuum tube solar water heater: solar radiation passes through the outer tube of vacuum tube, then is absorbed by the heat collecting coating, and is transmitted to the water in the tube along the inner tube wall. At this time, the water is heated, the temperature gradually increases, and the specific gravity decreases and increases, forming an upward power and forming a thermosyphon system.
As the hot water moves upward, it is stored in the upper part of the water storage tank, and the water with lower temperature is continuously replenished along the other side of the pipeline, and finally the whole tank of water rises to a certain temperature.
Flat-plate solar water heater: The medium naturally circulates in the heat collecting plate due to thermosiphon, and then transfers the solar radiation heat to the water tank in time. The medium can also be circulated by the pump to realize heat transfer, so there is a steady stream of people to keep the water temperature stable.
2. Circulating pipeline
In the vacuum tube solar water heater with direct-entry structure, hot water is powered by gravity; However, the flat type is powered by the pressure of tap water. However, both solar central heating systems use pump circulation. Due to the small heat collection area of solar water heaters, considering the heat loss, pipeline circulation is generally not used.
3, the system work
1) temperature difference control heat collection cycle
The temperature detector and water temperature sensor of the collector are placed in the solar hot water floor heating system, which can absorb solar radiation well and promote the temperature rise of the collector tube.
Then, when the temperature difference between the temperature of the collector and the temperature of the water tank reaches the set value △t, the detection system sends an instruction, and the circulating pump inputs the cold water in the central water heater into the collector, but the water is heated and then returns to the water tank again, so that the water in the water tank reaches the set temperature.
2) floor heating pipeline circulation system
The working principle of this system is to add a hot water circulating pump as a different point, and then better control the circulation of the floor heating pipeline through the controller. Then, when the water temperature reaches the set temperature, the floor heating circulating pump is automatically started, so that high-temperature water circulates indoors through the floor heating coil, thereby continuously increasing the indoor temperature.
If the water temperature in the water tank starts to drop below a set value, the best way is to automatically stop the circulating pump in the floor heating pipeline.
Schematic diagram and working principle of solar water heater II. Classification of solar water heaters
Solar water heaters are divided into vacuum tube type and flat plate type according to their structural forms, and vacuum tube type solar water heaters occupy 95% of the domestic market share. Vacuum tube solar water heater consists of heat collecting tube, water storage tank, bracket and other related accessories.
Second, the working principle of vacuum tube solar water heater
1. The solar radiation passes through the outer tube of the vacuum tube and is absorbed by the heat collecting coating, and then the cold water in the vacuum tube is heated. Because of the physical characteristics of water, the density of hot water is lower than that of cold water, so the water will "move" in the vacuum tube, cold water will come in slowly, and hot water will go out slowly and enter the insulation barrel. With the extension of radiation time, the heat will increase and the water temperature will increase accordingly, resulting in more and more hot water.
2. As the hot water moves up continuously, it is stored in the heat preservation water tank, and the water with lower temperature is continuously replenished along the other side of the pipeline, and so on, and finally the water in the whole water tank rises to a certain temperature. When the water temperature of the heat preservation water tank reaches the boiling point, it will still expand, and then the exhaust hole begins to work.
3. An ordinary vent is a pipe, but a good vent design is right above the insulation barrel, and there are two layers of pipes, and there is an insulation layer between the inner and outer pipes. The inner tube is made of metal material, which helps to dissipate heat.
There is a ball valve at the bottom, which is connected with the hot water in the inner container of the heat preservation water tank. When the air pressure in the heat preservation water tank is too high, the sphere floats to remove excess gas, and when the air pressure is normal, the sphere sinks to protect heat and avoid excessive heat dissipation.
Second, the working principle of flat solar water heater
1, the overall appearance color of the flat solar water heater is black, the frame is made of aluminum alloy bite edge (easy to disassemble), the light-transmitting panel is made of tempered glass (sufficient heat dissipation and quick heat absorption), and the middle is made of copper tube (quick heat absorption).
The copper tube is connected with a heat absorbing plate with black chrome blue film, and a layer of thickened thermal insulation cotton is adsorbed under the copper tube. The front surface of thermal insulation cotton is coated with reflective coating to assist solar radiation, and the bottom is made of toughened peeling pad, which has good wear resistance and better strength and helps to protect the internal structure of flat solar water heater.
2. When the sun shines on the black chrome blue film layer through the transparent tempered glass to generate heat, the water in the copper tube is heated, thus entering the natural circulation, and the principle of circulation is the same as that of the vacuum tube solar water heater.
3. Because flat solar energy produces heat faster, it produces hot water faster than vacuum tube solar water heater. Therefore, the flat-panel solar water heater will use a larger insulated water tank to store hot water, and a electric heating tube will be installed inside this insulated water tank to prevent the electric heating mode from being started after the water temperature drops for a long time.
Schematic diagram and working principle of solar water heater 3 solar water heater ranked first: Huang Ming solar water heater.
Huang Ming solar water heater is a well-known trademark in China and a top 500 brand in China. He is also a member of the International Solar Energy Association and a famous brand in China. Huang Ming Solar Energy Co., Ltd. has done quite well in the solar water heater industry. With 2 15 national patents, it is in a leading position in the world solar energy industry.
Solar water heater ranked second: Four Seasons Muge solar energy.
Four Seasons Muge Solar Energy is a well-known trademark in China, a top 500 value brand in China, a member of the International Solar Energy Society and a partner in China's space industry. At the beginning of 2000, Four Seasons Muge Solar entered the solar photothermal field, taking the lead in passing the international quality management system certification and the international environmental management system certification, and developed into a landmark brand in China's solar industry.
Solar water heaters ranked third: Huayang Solar Energy.
Huayang solar energy is also one of the top ten brands of solar water heaters. Huayang solar energy brand belongs to Huayang New Energy Group, and its enterprise is located in Jiangsu. It is also one of the founding enterprises of solar water heater industry in China.
Solar water heaters ranked fourth: solar rain solar energy
Sun Rain Solar Energy is a famous brand in China and a well-known trademark in China. Solar rainwater water heaters have developed rapidly in the solar energy industry. In the production process of products, strict checks are made, and the' environmental protection' and practical functions of products are in place. Moreover, Sun Rain Company is also very enthusiastic about public welfare undertakings, and established Sun Rain Charity Fund, which has solved many social employment problems.
Solar water heaters rank fifth: brilliant solar energy
As one of the top ten brands of solar water heaters, Brilliant Solar has never been complacent, and its production and development are carried out in strict accordance with international standards, so there will be no carelessness in the production process. There are quite a few consumers selling brilliant solar water heaters in the market now.
Solar water heater ranked sixth: Linuoruite solar energy
When it comes to the top ten brands of solar water heaters, we have to say that the solar energy brand Linoret. Linoret is a large water heater manufacturer in Asia, and its solar water heater workshop is also the largest in Asia. In terms of scale, Linoret is second to none among solar energy enterprises.
Solar water heaters ranked seventh: Tsinghua Sunshine Solar.
Tsinghua Sunshine Solar Water Heater has advanced production technology and high solar energy utilization rate. It mainly uses glass vacuum collector tube to convert solar energy into heat energy to heat water. It is safe, environmentally friendly, energy-saving and hygienic, and it is a new type of water heater product.
Solar water heaters ranked eighth: 1 100 million solar energy
Yijianeng solar energy is a famous brand product in China. Although it ranks lower among the top ten brands of solar water heaters, the product quality is still trustworthy. As the top ten brands of solar water heaters, Yijianeng is also constantly innovating and working hard.
Solar water heaters ranked ninth: Sang Le Solar.
Sang Le solar water heater is also a best-selling product in the water heater market. Regardless of the specific strength, as one of the top ten brands of solar water heaters, it still has its own consumer groups in the water heater market.
Solar water heaters ranked tenth: Pu Tian solar energy.
Pu Tian Solar is a well-known trademark in China and a leading brand among the world's solar energy brands. Beijing Pu Tian Solar Energy Industry Co., Ltd. has made quite good achievements in the water heater industry.