The power of the cast-iron radiator: calculation, factors
The main elements of a standard heating system are radiators that provide uniform heating of the premises, therefore, they must be installed in accordance with all requirements. Today, a diverse selection of models is available to consumers, the differences of which lie in both the form and the materials of manufacture. Over time, cast iron radiators have not become obsolete, and still continue to occupy stable positions in apartments and homes of users.
This material, as before, remains one of the most reliable and durable. Given the fact that modern cast-iron models have changed their appearance, becoming more modern and elegant, they continue to buy. For this reason, it is worth considering how to calculate their heat transfer in order to maintain a constant comfortable temperature in the rooms.
Power calculation
What it depends on
- Room area - in order for the radiator to effectively heat a given volume, it must have a certain heat output, which directly depends on the number of sections included in it. Is the power calculated in the standard way: 1 kW - 10 m? premises, respectively - at 1 m? will require 100 watts.
Now the instruction recommends determining the area of the room itself and calculate what heat output the radiator should have to maintain the set air temperature.
- Factors - however, not everything is so simple, and the above calculation is approximate, you should consider the various nuances that affect the heat loss:
| Contact of two walls with the street | In this case, the heat loss will increase, so the power of the heater or appliances should be above average. |
| Door and window openings | Influence on penetration into the room of outside air. Plays the role and material of which they are made. |
Tip: it is necessary to calculate the heat transfer of the radiator, taking into account all the negative factors that imply cold air entering the room.
- To find out the heat transfer of a heating device, you should know the power of the cast-iron radiator section MS 140 and add up their number. This indicator for most manufacturers is standard and is equal to 150 W, but depending on the shape and quality of the device, it may vary slightly.
Heat carrier
Another indicator that needs to be considered is the temperature of the circulating fluid.
Therefore, the standard power section takes into account two temperature indicators:
- indoor mode;
- temperature inside the heating system, depending on the degree of heating of the coolant.
The power of thermal energy is determined by the difference between these indicators. And if at a temperature of the coolant equal to 70 ° C, the difference was 50, one can say that the power of section 1 of the cast iron MS 140 is 150 watts.
First of all, this is due to the fact that it is such a temperature that is taken into account in which a constant air temperature in the room will always be maintained at 20 ° C. In addition, the heating of the coolant takes into account the properties of cast iron, not characterized by high rates of heat transfer.
Simple way to calculate
If everything is difficult with calculations, you can resort to a simpler method and take advantage of many years of experience to those who already use such radiators. For a room of 15 m? A 10-piece radiator is required.
However, it should be noted that in this case there should be one window in the room. For each subsequent it will be necessary to add more sections, the number depends on the design of the window opening itself, the material from which it is made, the number of chambers in the glass unit and other factors. But, as a rule, one more or two sections are added, as a result, the price of equipment increases.
Tip: when the area of the room exceeds 20 m ?, there should be several radiators. And they should be installed in different places, since even having increased a certain number of sections, the situation will not improve.
The main qualities of cast iron radiators
Heat is generated by heating devices in two ways:
- convection;
- radiant energy.
They are able to create a heat curtain, so they are recommended to be installed under the windows, from where the cold comes.
However, the power of one section of the cast iron radiator MS 140 is not the main indicator of the reliability of the device. For example, aluminum and bimetallic radiators are more heat dissipating, but their service life is much less.
Perhaps this was the reason that the cast-iron models are still in demand. You must admit that in no old building you will find as many aluminum batteries, but cast-iron ones, installed in past centuries, as you like.
The opinion of many people agrees that a large amount of coolant, required for them, is very uneconomical and leads to waste of energy, required for its heating. But this is just a misconception, the more the device contains a coolant, the more it gives off heat.
In addition, if for any reason the coolant supply stops, the cast iron battery will retain heat transfer for a long time, which is explained both by the material properties and the large volume of hot water it contains. The only drawback of the devices lies in their high inertness, which contributes to too slow heating, all other problems are completely solvable.
Conclusion
During its long operation, cast-iron radiator models have shown themselves only on the good side. Today, not only standard models of such devices are in demand, but also modern ones.
The only drawback is a large mass, so they can be installed with their own hands only on the main wall or on the floor. The video in this article will allow you to find additional information on the above topic.