For many consumers, the issue of choosing a gas boiler became topical. Conventional boilers, which preferred to install earlier, began to give way to heating condensing boilers.
Principle of operation of condensing boilers
Both in the traditional gas boiler and in the condensing gas during the combustion of gas, part of the energy is given to the heat carrier. In this case, only a part of the heat energy is used in conventional boilers.
The rest of the energy that is not consumed is called hidden energy. When burning gases, water vapor is formed, which is converted into a liquid. This liquid condenses and due to this, a hidden energy is formed.
In a conventional gas condensing boiler, there is a struggle.
The design of condensing boilers requires the presence of two heat exchangers, which can be combined or separate. The principle of operation of one of these heat exchangers is similar to a traditional boiler.
Another heat exchanger is arranged in such a way that thermal steam is condensed on its walls, which gives the water latent heat energy. Thus, condensed boilers consume hidden energy. Due to this, the efficiency factor in them is 108-109%. This is 15% higher than the efficiency in conventional boilers.
Apply the principle of operation of condensing steel boilers after the appearance of stainless steel and materials resistant to corrosion (for example, silumin - aluminum-silicon alloy). The water condensate has a high acidity, which causes corrosion of the boilers made of steel and cast iron. The boiler equipment made of stainless steel is protected from corrosion.
Pros and cons of the condensing boiler
Condensing boilers have undeniable advantages over conventional boilers. These include:
- economy (on the economy of gas exceed conventional boilers on average by 20-30%);
- high environmental friendliness due to the minimum emission of harmful substances (7 times less than conventional boilers);
- light weight and dimensions of equipment. Thanks to this, boilers take up little space during installation;
- low noise and low vibration;
- The chimney is smaller than the traditional boiler. In addition, the material for the chimneys can be plastic, which will save on the installation of the heating system.
The main disadvantage of condensing boilers is their high cost. They are twice as expensive as conventional boilers.
When choosing condensing boilers, boilers of German companies such as Viessmann and Buderus are popular with consumers.
Condensing boilers Viessmann
Viessmann boilers can be single-circuit or combined. Their power is up to 31.9 kW. Boilers of this company can be wall-mounted or floor-standing. Wall-mounted boilers are equipped with an acid-resistant heat exchanger made of corrosion-resistant materials.
In the combined models a plate heat exchanger is installed, which
Condensation boiler Buderus
Buderus mainly specializes in wall-mounted condensing gas boilers. These boilers are installed in apartments or houses, as well as in industrial enterprises.
Boilers are equipped with an improved heat exchanger, a roasting ignition electrode, a special control unit, a modulating circular pump.
Thus, if you have a question about purchasing a gas boiler, you can analyze the available information and make your choice in favor of a traditional or condensing gas boiler .