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 very low longwave emissivity, thus effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water.ude. 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.
There are several types of underfloor heating that you may notshould not use. Which ones have the best effect?
Electric underfloor heating consumes around 64 kilowatt hours per day. . about.
For example:
The amount of electricity used daily by electric underfloor heating is linked to the interior paving surface, for example: a set of two bedrooms and a living room For a house of 93 m², if the housing availability rate is calculated at 80%, the actual interior surface area will be 74.4 m², then we deduct approximately 8.4 m² of balcony and kitchen without floors. Therefore, the actual interior area for electric floor heating is approximately 66 square meters.
Generally, the electric floor heating installed in the bathroom is 150 watts/square meter, and the electric floor heating installed in other spaces is 120 watts/square meter. The total power is approximately 8 kilowatts.
GoodAs electric floor heating works 24 hours a day, the actual power consumption per day is about 6-9 hours. If calculated based on 8 hours of electricity consumption per day, electric floor heating consumes approximately 64 degrees. of electricity per day.
Detailed information
Disadvantages:
1. The installation price of electric floor heating is relatively high and there will be slight radiation. Radiation from electric floor heating has minimal impact on the human body unless inferior cables are used.
2. Electricity bills are generally billed in installments. If electric floor heating is used on a large area, the subsequent use cost of electric floor heating will be relatively high in terms of electricity prices. And if there are faulty areas in the heatinge electrical to the ground, then everything needs to be replaced.
3. The installation of electric cables for underfloor heating requires a relatively long time and more qualified technology, otherwise it may cause certain problems for the further use of underfloor heating. In addition, electric floor heating is also a hidden floor heating project. Once a fault occurs, the maintenance work is relatively complicated and time-consuming, requiring multiple aspects of maintenance, causing more problems.
Baidu Encyclopedia - Electric Floor Heating
What are the advantages of electric floor heating compared to traditional floor heating?
As winter approaches, the weather gets colder and colder. As the habitat we live in, it must have the function of keeping warm. Therefore, underfloor heating has become an important choice for. chathan home. Only good underfloor heating can keep you warm. Some bad underfloor heating systems are not even as warm as the radiator used before.Some underfloor heating systems are very powerful. This type of floor heating will not only cost a lot of electricity, but also have high power and may cause safety accidents. It is especially difficult to choose for families with children and elderly people. Therefore, do not choose underfloor heating with relatively high power. So, which type of floor heating should we choose and which type of floor heating can be called good floor heating.
The first type: water underfloor heating
Water underfloor heating, as its name suggests, consists of heat water by heating the water, with pipes placed under the ground. Hot water is added to the pipe. The temperatureThe water temperature is around 60 degrees Celsius, then the heat is transferred to the house by the heater. In addition, the water in the pipe can be used for a long time, so the cost is relatively low, and the floor heating is also healthier and safer.
The second type: electric floor heating
Electric floor heating transfers heat by generating electricity. The electric hot plate is placed under the floor and then conducts electricity. To produce electricity, the Zair heater transfers heat to the house. This type of underfloor heating has many advantages. It is not only environmentally friendly, but also very energy efficient. In addition, electric floor heating will not cause air leakage. So it is very suitable for families with elderly people and children at home to use electric floor heating.
The above two types of underfloor heating can be called the best underfloor heating.Both from the point of view of safety, health and even environmental protection. environment, they are very suitable for domestic use.
Electric underfloor heating. What are the advantages of electric underfloor heating compared to traditional heating? Compared with traditional heating methods, electric floor heating has obvious advantages: first, the room temperature is evenly distributed. Thanks to underfloor heating, the temperature difference in the room is extremely small because the entire floor is evenly distributed thanks to electric underfloor heating. In addition, the indoor temperature gradually decreases from low to high, and the floor temperature is higher than the temperature of the human respiratory system, giving people a comfortable feeling of warm feet.uds and fresh head.
Usually, traditional heating methods, especially those burning coal, not only produce a large amount of dust and harmful gases, but also leave a lot of residue, which is neither good nor for the human body nor for the environment. Another point is that the cost is relatively high. Electric heating is different: it uses electrical energy and has safe and developed circuits. It will not pollute the environment or affect people's health.
Compared to other heating methods, most electric heating must be laid underground. It is easy to install and the choice of materials needs to be better, as subsequent maintenance etc. is more difficult, so go from there. From one point of view, the cost is not very low. However, electric heating can be used for a long time and the comfort level is particular.significantly high, both from an economic point of view and from a comfort point of view.
Compared to the commonly used water floor heating, electric floor heating is thinner and is very practical for communities with larger floors. At the same time, compared with traditional floor heating, electric floor heating can save about 5% of indoor space.
Electric floor heating installation method:
1. Install the underfloor heating insulation board first to prevent heat from transferring downward. Be sure to clean the floor before installing the insulation board.
2. After installing the insulation board, install the reflective film for underfloor heating. The function of reflective film is to reflect heat upwards.
3. Installing a silicon crystal mesh prevents the heating cable from sinking into the insulating layer after heating. This can e.g.also reinforce the cement layer.
4. Lay the heating cables. Please note that the heating cable cannot be cut or spliced at will. It must be laid entirely in a roll, the spacing must therefore be calculated before installation. The spacing calculation method is as follows: installation surface/length of the heating cable.
The installation area here refers to the area where the heating cable is actually installed. For example, if a room is 15 square meters, but there is no sidewalk under the cabinet, then the cabinet area must be deducted. Assuming the cabinet area is 1 square meter, the actual floor space is 14 square meters. Then divide by the length of the cable.