Before buying any heating equipment, each client specifies the main characteristics of the device and how they meet the required requirements. The main such indicator can be safely called the power of the electric boiler. Knowing it, everyone will immediately determine whether the model is suitable for his needs or not. In order to operate at least with approximate figures, you need to calculate them in advance. It is also important to understand what factors they depend on.
Power selection depending on the quadrature
The simplest method is to calculate the required power of an electric boiler, based on the area of u200bu200bthe room that is planned to be heated. So, in areas where the climate is mild, it is necessary to use a proportion of 100 W per 1 sq. m. In the southern or northern regions, the indicators may differ by 20 units.
Of course, this approach is not correct. But in order not to freeze in winter, it is better to buy an installation with high performance. How to correctly calculate the power of an electric boiler, having only an area? Very simple. True, for this it is still necessary to know the specific coefficient in order to calculate the region. For warm latitudes, it is 0.7. Averages use 1.2. And northern — 2.
Important! Be sure to remember that in case of an incorrect definition, excess electricity will be consumed. This can significantly increase operating costs.
To calculate the power of the installation, you need to substitute the values u200bu200bin the formula: W u003d S * K, where
W is the calculated parameter of the equipment;
S is the area of the room to be heated;
K is the coefficient.
The approach is not ideal. But at the same time, he takes into account the real climatic conditions, which directly affect the rate of cooling of the building.
Often there are situations when the owner of a house or apartment has installed a high-capacity boiler. And yet the room is still cold. Despite the fact that the use of what equipment is provided — an electric or gas boiler.
First of all, it depends on the impossibility of containing the energy inside the structure.
Power selection depending on heat loss
So, it is already clear that the power of the electric boiler is selected, not only based on the existing quadrature. Since this indicator does not cover the situation completely, for which the owner of the house or apartment may pay in the future.
When choosing a unit, it is necessary to take into account heat losses. So, for example, if a building has obvious elements through which energy escapes — panoramic windows are installed, there are gaps in the doors — it will be difficult to heat such a structure, regardless of the installation. Especially if low power electric boilers are used.
It is important to understand that the unit must generate more heat than the room loses. At the same time, it must be borne in mind that energy leaves the house constantly, which means that the equipment will always work. This is definitely unacceptable. Any heater must rest. Therefore, it is necessary to calculate the power of the boiler with a margin. The thing is that with constant work, the installation will quickly fail. And this is quite unpleasant, especially when it’s cold outside.
Before buying a boiler, you need to determine the heat loss of the building, as this will directly affect the resource consumed, or rather, its quantity. You will need the following information:
- the material from which the walls and ceilings are made;
- their thickness;
- window area and number of chambers.
All raw materials have different thermal conductivity. It can be seen in the corresponding table:
In order to determine the numbers we need, it is necessary to take the thickness and divide by the thermal conductivity coefficient of a particular raw material. Each component is calculated separately. After that, all the numbers must be added.
Then, as we find out the individual elements, the calculated overall indicator is taken. To do this, you need to multiply the area of u200bu200bthe heated room by the temperature difference in the house and on the street. The result obtained is divided by the total thermal resistance. In this case, the delta is taken for maximum performance.
This approach will allow you to calculate the most accurate parameters for the equipment. Therefore, do not be lazy once again, but use this particular method. Of course, you need to spend much more time on it, but the result will be as close to the truth as possible.
Power selection depending on the coolant
In order to choose the right electric boiler, it is also important to remember the coolant with which the heating will be carried out. To calculate we need to know:
- its volume;
- what kind of liquid;
- wiring diagram.
It should be noted that the last factor can be called insignificant. Nevertheless, he is still able to slightly change the overall picture.
But the first — volume — is an important parameter. For example, when calculating the most accurate power that an electric boiler should have, the heat accumulator was not taken into account. And such a tank contains a lot of liquid — an average of at least 300 liters. As a result, the system will not perform well.
Important! To heat one liter of water, an electric boiler consumes 0.001 kW of energy per hour.
The unit raises the liquid temperature to a user-set level. Let’s take 40 degrees as an example. So, in the case of the first start-up, the coolant will warm up to a maximum of 20 units Celsius. After reaching the set goal, the electrical installation will turn off automatically. Or an external sensor will do it. First of all, it depends on the “stuffing” and the model.
It should be understood that if there is a lot of liquid in the system along with a heat accumulator and at the same time the equipment performance is low, it will always have to work. And this is unacceptable. Be sure to know that the use of antifreeze in the heating system also creates unnecessary work for the unit. After all, such mixtures have a lower thermal conductivity. And this will increase energy consumption and duration of work, which is not a positive thing.
When calculating the power of the boiler, it is necessary to take into account heat losses. In addition, it is necessary to check with a specialist whether this or that model can cope with the available amount of coolant. Of course, all calculations can be carried out quickly and as simply as possible, but then problems will most likely appear during the use of the unit.