Diagram of working principle of solar water heater 1. Cold water enters the solar water heater through the pipe, passes through the heat collecting plate, and the heat collecting plate can collect the energy solar, convert solar energy into thermal energy, then heat cold water. Since the density of cold water is higher than that of hot water, the hot water will automatically increase and then form circulating power. The water will gradually heat up on the heat collecting plate. After reaching a certain temperature, it can enter. the hot water tank. Those who need hot water will be able to get hot water at any time. Heating Figure 2. In fact, the principle of solar water heaters mainly includes the following two principles: (1) The principle of water circulation, that is, the water flows automatically. This is based on the fact that cold wateris denser than hot water. Cold water flows and hot water rises, forming natural convection that gradually heats the water in the water tank until it reaches the set water temperature. When the intensity of the sun is not sufficient to meet circulation needs, a water pump can be added to the closed water circulation circuit to obtain forced circulation. (2) Collector heat absorption principle: There is a special coating on the collector surface of the solar water heater. This coating has a high absorption rate in the visible range of solar energy. After absorbing it in the form of heat, heat. the radiation from the collector will have the wavelength in the longwave range and the coating has low longwave emissivity, thus effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water.Solar collector tube Let's talk in detail about the collector tube on this collector. The collector tube is actually like an elongated hot water kettle liner. It is made of two glass tubes, one large and one small. the inner layer is covered with a spectrally selective absorption coating and a straight void is drawn between the inner and outer tubes. It forms the core of the solar water heater and is used to maximize the absorption of thermal energy after solar radiation due to vacuum. The glass tube is round, has the characteristics of naturally following the wide source of the sun, coupled with the reflection principle of the reflector, the glass tube can receive light from all sides, the heat collection effect lasts longer , the water temperature is higher, and it can work normally all year round, even in alpine areas.
Principles of solar water heaters
With the improvement coContinuing environmental awareness, more and more families are starting to use solar water heaters. The solar water heater is a device that uses solar energy to heat water. It is not only environmentally friendly and energy efficient, but also inexpensive to use. However, in rainy weather, the performance of solar water heaters will be affected. So we need a solution to solve this problem. At present, electric heating of solar water heater becomes a good choice.
1. The principle of electric heating of solar water heater
The principle of electric heating of solar water heater is very simple, that is, adding an electric heating tube to the water tank 'water. of solar water heater when solar energy is insufficient, it can be heated by electric heating tubes to heat water. In this way, the hot water supply can beguaranteed in rainy weather.
2. Solar water heater electric heating operation steps
1. Buy electric heating tubes
First of all, you need to buy electric heating tubes. There are many types of electric heating tubes. Choose the appropriate electric heating tube according to the model and specifications of the solar water heater.
2. Install the electric heating tube
Install the electric heating tube into the water tank of the solar water heater. For specific installation methods, please refer to the installation instructions of the electric heating tube or ask a professional to install it.
3. Connect the power supply
Connect the electric heating tube to the power supply. It should be noted that the voltage of the power supply and the rated voltage of the electric heating tube should be thesame, otherwise the service life of the electric heating tube will be affected.
4. Use solar water heater for electric heating
In rainy days, you can heat the water in the water tank by turning on the power to ensure hot water supply.
3. Advantages of electric heating with solar water heaters
1. Improve hot water use efficiency
In rainy weather, the solar water use effect radiators will be affected and through the heating of electric heating pipes, the The hot water supply can be guaranteed and the efficiency of hot water use can be improved.
2. Save energy
Solar water heater is an energy saving device, and the use of electric heating tubes is also very environmentally friendly because its energy consumption is relatively low and its use the cost is relativelyweak.
3. Convenient and practical
The electric heating of solar water heaters is very convenient to install and use. You just need to buy an electric heating tube, install it in the water tank. of the solar water heater and connect it to the Can power supply.
IV. Precautions for electric heating of solar water heaters
1. Choose a suitable electric heating tube
When purchasing an electric heating tube, you should consider this. the characteristics of the solar water heater. Choose the appropriate electric heating tube model and specifications, otherwise the use effect will be affected.
2. Pay attention to safety when connecting the power supply
When connecting the power supply, pay attention to safety to avoid electric shock accidents.
3. You should pay attention to energy saving whenits use
Although the power consumption of electric heating tubes is relatively low, you should still pay attention to energy saving when using it. to avoid wasting energy.
Working principle of solar water heater
Working principle of solar water heater Figure 1. Cold water enters the solar water heater through the pipe and passes through the heat collecting plate, which can collect solar energy, convert solar energy into thermal energy, and then heat cold water. Since the density of cold water is higher than that of hot water, the hot water will automatically increase and then form circulating power. The water will gradually heat up on the heat collecting plate. After reaching a certain temperature, it can enter. the hot water tank. Those who need hot water will be able to get hot water at allmoment. Heating Figure 2. In fact, the principle of solar water heaters mainly includes the following two principles: (1) The principle of water circulation, that is, the water flows automatically. This is based on the fact that cold water is denser than hot water. Cold water flows and hot water rises, forming natural convection that gradually heats the water in the water tank until it reaches the set water temperature. When the intensity of the sun is not sufficient to meet circulation needs, a water pump can be added to the closed water circulation circuit to obtain forced circulation. (2) Collector heat absorption principle: There is a special coating on the collector surface of the solar water heater. This coating has a high absorption rate in the visible range of solar energy. After absorbing it in the form of heat, the collector.The wavelength of theHeat dissipation thermal radiation is in the long-wave range and the coating has very low long-wave emissivity, thereby effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water. Solar collector tube Let's talk in detail about the collector tube on this collector. The collector tube is actually like an elongated hot water kettle liner. It is made of two glass tubes, one large and one small. the inner layer is covered with a spectrally selective absorption coating and a straight void is drawn between the inner and outer tubes. It forms the core of the solar water heater and is used to maximize the absorption of thermal energy after solar radiation due to vacuum. The glass tube is round, has the characteristics of naturally following the broad source of the sun, coupled with the reflection principle of the reflector, the worm tubere can receive light from all sides, the heat collection effect lasts longer, the water temperature is higher, and it can work normally all year round even in alpine areas.
Diagram of working principle of solar water heater 1. Cold water enters the solar water heater through the pipe, passes through the heat collecting plate and the heat collecting plate can collect solar energy, convert solar energy into thermal energy. energy, then heat the cold water. Since the density of cold water is higher than that of hot water, the hot water will automatically increase and then form circulating power. The water will gradually heat up on the heat collecting plate. After reaching a certain temperature, it can enter. the hot water tank. Those who need hot water will be able to get hot water at any time. Heating Figure 2. In factt, the principle of solar water heaters mainly includes the following two principles: (1) The principle of water circulation, that is, the water flows automatically. This is based on the fact that cold water is denser than hot water. Cold water flows and hot water rises, forming natural convection that gradually heats the water in the water tank until it reaches the set water temperature. When the intensity of the sun is not sufficient to meet circulation needs, a water pump can be added to the closed water circulation circuit to obtain forced circulation. (2) Collector heat absorption principle: There is a special coating on the collector surface of the solar water heater. This coating has a high absorption rate in the visible range of solar energy. After absorbing it in the form of heat, heat. the radiation from the collector will have the wavelength in lhas longwave range and the coating has low longwave emissivity, thus effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water. Solar collector tube Let's talk in detail about the collector tube on this collector. The collector tube is actually like an elongated hot water kettle liner. It is made of two glass tubes, one large and one small. the inner layer is covered with a spectrally selective absorption coating and a straight void is drawn between the inner and outer tubes. It forms the core of the solar water heater and is used to maximize the absorption of thermal energy after solar radiation due to vacuum. The glass tube is round, has the characteristics of naturally following the wide source of the sun, coupled with the reflection principle of the reflector, the glass tube can receive light from all sides, the collection effectThe heat lasts longer, the water temperature is higher, and it can operate normally all year round, even in alpine areas.