One of the important elements of the heating system is the radiator. Its function is expressed in the conduct of heat in housing, as well as buildings of other purposes. Heat dissipation of the radiator depends on radiation and convection. The latter process is natural and independent. It is peculiar to gases and liquids.
For reference
Natural convection is not so effective, therefore, to increase the heat transfer coefficient in modern systems, forced is most often used. This process is carried out using a circulation pump.
Power section
If you are interested in the power of the section of an aluminum heating radiator, then you should familiarize yourself with the documents for the device. If the volume is 0.5 l, then manufacturers usually declare this parameter at a level of 180 watts or less. If the temperature of the coolant water will vary from 65 to 70 ° C, then in reality the thermal power of one section of the aluminum radiator will be less and will be about 140 watts.
Getting acquainted with the characteristics of the battery, buyers quite often pay attention to the heat transfer formula: ∆t 70 ° C = 160/200 W. The difference between the average air temperature and the average temperature in the heating system is denoted by ∆t. This suggests that for a ∆t of 70 ° C, the air temperature in the room can be 20 ° C, and the average temperature in the heating system should be equal to 100 ° C, while the return will be equal to 80 ° C in the return.
But such figures in reality are quite difficult to achieve. Therefore, taking the power of 1 section of an aluminum radiator, you will need to determine the heat transfer, taking into account the ∆t value equal to 50 ° C. As an example, consider the middle section of the battery with the following dimensions: 100 x 600 x 80 mm. It is able to heat approximately 1.5 m 2 of area, which corresponds to heat transfer from 140 to 160 watts. When the right number of sections for the room is selected, the condition and location of the walls should be taken into account. If the room is angular, and one of the walls freezes, this fact should be taken into account.
More about power. Calculation of the number of sections
Knowing the power of one section of an aluminum radiator, you can determine the number of elements. To use this you need the following formula: K = S * 100 / P. In it, the letter K indicates the number of sections. S is the area of the room, and the power of one section is indicated by the letter R. If we take into account the average power, which is 150 W, and the room area is 25 m 2 , then the calculation will look like this: 25 x 100 / 150. This will allow you to understand That for effective heating of a room with the mentioned parameters 16 sections are necessary. Using this formula, you can calculate what is the volume of the required number of sections to accommodate a particular area.
On the power of sections of radiators for 500 and 350 mm
One 500 mm section is a standard part of a conventional battery, which is most common in apartments and houses, as well as in offices. Some manufacturers mention in the documents that the power of one section of an aluminum radiator can range from 180 to 230 watts. The more expensive the products of one or another manufacturer, the higher the heat dissipation of the battery. That is why chasing cheap Chinese batteries is not worth it. In addition, they have a short life.
On sale you can find a reduced battery, which will come in handy in a limited space. This applies to walls with large windows or areas with narrow pockets. The power of one section of the aluminum radiator in this case will be lower, since the used coolant is supplied in a smaller volume, and the battery area is smaller. The described value here ranges from 120 to 160 watts. The final value will depend on the manufacturer. It is necessary to choose a radiator correctly. After all, if its power is insufficient, then the apartment will be cold, and if you hang a battery with a large number of sections, then you will in vain spend electricity and gas. However, the latter factor is relevant only for private homes with appropriate heating systems.
Key Features
Choosing aluminum radiators, you can count on their profitability and low weight. The latter will not cause inconvenience during installation and disassembly. To control the temperature, such batteries have a regulator.
To install the device, the master does not need to have special knowledge and skills. The specific thermal power of one section of an aluminum radiator, according to experience, is the largest among similar devices. Such batteries are very original and presentable, so you can use them not only in ordinary apartments, but also in luxury homes.
Negative reviews
Before choosing an aluminum radiator, you should familiarize yourself with the opinions of consumers who are not always positive. For example, some buyers note that water is sometimes leaked at intersection joints. The distribution of heat in such batteries is uneven. It focuses on the ribbed surface.
Customers also don't like the fact that convection returns are very small. Such a battery can last a short time - up to 15 years. But some manufacturers corrected this defect by increasing the warranty to 25 years. Buyers quite often refuse aluminum radiators also for the reason that they are chemically active, so corrosion is a serious enemy for these devices. But manufacturers are introducing anti-corrosion treatment into the production process, covering the surface with a layer of oxide film.
Manufacturing Features
When you become aware of the power of the aluminum radiator section by 500 mm, it is important to inquire about other characteristics, for example, the method of manufacturing the battery. Such devices are made by casting or by extrusion technology. The first method provides that all sections are manufactured separately. The device as a result turns out to be quite durable, since among the components there are silicon additives (about 12% of the total volume).
The casting process is carried out under high pressure. This method contributes to the fact that radiators can be made in very different shapes. Such batteries withstand operating pressures from 6 to 16 atmospheres. The water channels are somewhat widened so that the water flows as freely as possible. The walls are strong, as they have a fairly impressive thickness.
The power of 1 section of an aluminum radiator per 500 mm is not all that you should know about such a device if you plan to purchase it. For example, the final characteristics are affected by the manufacturing method. Battery production can be carried out by extrusion. This method involves the use of extrusion. All components of the radiator are made separately, and then fastened together.
The collector is poured out of silumin, all parts are well pressed and firmly connected. The extrusion method compared to casting is cheaper, but the radiator cannot be improved during operation.
Features of anodized aluminum radiators
What power section of the aluminum radiator, you now know. But before buying a heating appliance, it is important to inquire by what technology the battery was made. If you have an anodized aluminum radiator in front of you, then you should know that the material undergoes better cleaning during the production process. This allows you to slightly change the structure of the metal. Anodized radiators, unlike pure aluminum, are almost not afraid of corrosion. The individual parts are interconnected by couplings, and not by means of nipples. These couplings are located outside the heater.
Anodized aluminum batteries are smooth inside, which contributes to higher heat transfer rates. In addition, such devices are capable of withstanding a higher working pressure. It can reach 70 atmospheres. However, annotated aluminum radiators are more expensive than simple ones. However, the latter have worse performance.
Usage Reviews
When you know the power of one section of an aluminum radiator, but you still don’t know whether to buy such a heater, you should get acquainted with the opinions of consumers about the features of operation. For example, it is recommended that such batteries be flushed with running water once a year. Before starting operation, it is important to make sure that the radiator is installed correctly and is interfaced with the quick disconnect system.
It is impossible to install such devices in the same base as the boiler, which has a built-in copper heat exchanger. Consumers emphasize that when copper and aluminum come into contact, a galvanic pair is formed. In this case, copper acts as a strong metal, which attracts aluminum ions, turning it over time into foil. Masters emphasize that this law does not apply to systems made of polypropylene or plastic pipes. There is no direct contact of copper and aluminum.
Conclusion
Aluminum radiators are very common today. They can be made by metal pressing. Internal surfaces have high smoothness, which was achieved by coating the material with a special protective film.
Outside, the products are powder coated. Radiators must receive water, which is being pre-cleaned. This will eliminate oxidation. However, some modern manufacturers offer aluminum radiators, which are pre-treated with a polymer composition. This reduces the risk of corrosion.
When choosing, however, it is important to pay attention to some technical characteristics. One of them is power. Knowing this parameter, characteristic of one section, you can calculate the number of elements in the battery for a comfortable stay in the room.