Heat exchanger for the chimney pipe for heating: types, operating principle, installation

Heating appliances that use combustion to generate heat are not able to function without a smoke channel.

Need to use

The last of the elements mentioned above gets rid of toxic combustion products, which can be dangerous for human health. But the flue gases that leave the unit through the pipe, escaping into the atmosphere, carry with them heat in a large volume. It could be used to heat rooms. In order for this defect to be corrected, a heat exchanger is installed on the chimney pipe. This device can significantly increase the efficiency of the heating appliance.

The main varieties

Today there are several types of heat exchangers, their design is roughly similar, which can be said about the principle of operation of these devices. They have a hollow body that has inlet and outlet nozzles. The brake device is located inside, it is intended for flue gases. This system is most often a dampers with cutouts that are mounted on the axes. Elements can be rotated to form a zigzag flare of different lengths. Adjusting the position of the dampers allows you to choose the most appropriate ratio of draft in the pipe and the efficiency of heat exchange. At the same time, safety standards are not violated at all. There are also the simplest versions of heat exchangers, which do not have in the structure of adjustable dampers.

Principle of operation

If you plan to install a heat exchanger on the chimney pipe, you should familiarize yourself with the principle of operation of this device. Holes that are located at the bottom of the device, tighten the cold air, while using the principle of convection. Air masses pass through the inner space, gases are heated. Through the holes located above, the heated air is pumped into the heated space. This can significantly improve the efficiency of the device, reducing the amount of fuel consumed. As practice shows, the fuel consumption of the "burzhuyka" with the heat exchanger installed on the chimney is reduced by 3 times.

The heat exchanger can only be installed on the chimney pipe after the device has been selected. It should not be forgotten that when heat is released in the flue gas, the combustion products quickly cool down. This causes a decrease in the temperature difference in the pipe, the drop in thrust in the system is instantaneous. In order to exclude the appearance of this effect, adjustments of the flaps are applied or the most suitable size of the structure is selected.

Types of heat exchangers depending on the material

If you decide to install a heat exchanger on the chimney pipe, it is important to decide which model will be used. There are several types of similar devices, depending on the material in the base. The most optimal is food grade stainless steel, which is also called austenitic. Its characteristics are not affected by difficult conditions, for example, high temperatures, but weld seams do not crack, the reaction of nickel and oxygen leads to the formation of a film on the surface of the layer that is highly resistant to acids and salts.

If you install the heat exchanger on the chimney pipe for heating from such a material, the device will be the most durable. But from zinc is better to refuse, if the temperature acting on it, will exceed 200 degrees. After the evaporation begins, and the temperature is above 500 degrees, the concentration of harmful substances will exceed the maximum permissible level. However, if there is a zinc profile, the heat exchanger is best tested. It is important to understand to what temperature it will heat up. If this limit is not more than 200 degrees, then you should not worry.

This profile has an advantage, which is expressed in the fact that the material helps to increase the intensity of the air flow around the compensator. This option is perfect if you need to warm up the room quickly enough. But such a need should not arise quite often. Zinc heat exchanger on the chimney pipe in the bath is best not to install, as the exposure temperature can be quite high. It is best to use a similar device for the oven in the country, which will be operated from time to time.

Installation

It is possible to distinguish two modes of operation of the heat exchanger of the chimney, each of them is distinguished by a certain heat transfer inside. The first option is to connect a portable water tank to the heat exchanger, which will need to be heated. Compensation will occur on the inner tube, and the heat exchanger will be heated by heat from the steam. This option will allow you to heat up the water for a long time, since the temperature on the walls will be equal to 100 degrees. If you decide to install the heat exchanger on the chimney pipe with your own hands, then you can use the "pipe on tin" technology. The essence of this option is that the chimney will be with a pipe of metal or copper, which heats up itself and heats the air passing through it. With the help of argon welding or a torch, such a spiral can be welded to the chimney. Tin will act as a binder, but it must be degreased with orthophosphoric acid. Such a spike will be durable and strong.

Using the hood for the attic room

A heat exchanger for a chimney pipe can be bought in St. Petersburg at an affordable price. If you yourself decided to do the work, then the installation may involve the installation of a hood, which will operate on the principle of a furnace with the appropriate name. Such a system works quite simply. Functioning is that the discharged air will tend to upward, and the cooled down will drop down. This option will be an excellent solution for simple chimneys made of metal, which are located in the area of the second floor.

Using a hood, you can reduce the risk of fire or burn. In order to ensure the accumulation of heat, some masters surround this type of heat exchanger with a mesh with stones, which makes the appearance of the device more attractive. Thanks to this mechanism, the pipe will not heat above 170 degrees, and the hottest place will be near the gate.

Installing the heat exchanger by the type of corrugation

The heat exchanger on the chimney pipe, the price of which is about 3000 rubles, can be installed according to the principle of corrugation. The technology will be extremely simple and very practical. To carry out the work will need three corrugations, which are made of aluminum. These elements wrap around the chimney.

Recommendations

You can make such manipulations on any floor of a private house, this also applies to the attic. The air will be heated in the pipes from the chimney systems, and the heated masses will be sent to the rooms. Heating is practical, and furnaces in each room can not be installed, if the area is large enough, it will warm up to high temperatures.