A wood burning boiler for home heating

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2019-06-06 19:00:26

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Despite the fact that the majority of private households connected to the pipeline, the most ancient method of heating homes by burning wood is still very popular. Heat generators that run on this ecological fuel is constantly improving, and every day made easier and more efficient. The engineers managed to increase the burning time of the fuel tabs. Due to this development there appeared a wood-burning boilers for heating private houses.

Features and benefits

These units have a resemblance to the old archaic solutions, have several important advantages. So, the design is extremely simple, and to break it is almost nothing. In some regions wood is not only available, but are produced virtually for free.

Wood-fired boiler for heating, being untethered from the centralized systems of power supply, completely independent. Therefore, users who have a sufficient amount of fuel for it, is insured from a variety of troubles.

boiler for heating

Disadvantages

There are other features that are unwanted. The unit has high thermal inertia. This means that if you completely restrict the access of air, the power of the falls, not instantly. It risk – the coolant can boil. In the piping a wood boiler for the house must be installed safety valve.

Gases that are in smoke, contain harmful substances – oxides of different chemical elements. The danger of them that combines with water, they form acids – sulphur and others. The condensate which is formed when the combustion products cool down, will be quite pungent. So experts recommend to set limits on the temperature of the water or antifreeze in the heating system coming from the reverse circuit to the heat exchanger. The temperature should not fall below 55 degrees. To prevent such cases in the system mounted a special node, automatically redirecting the part of the heated heat carrier cooled down in reverse outline.

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long burning boilers

Another feature of wood-fired boilers – the need for periodic cleaning of the inside of the device from the combustion products. Also requires cleaning and chimney. How often does that accomplish? Experts say that to clean a chimney yourself heating and a wood-burning boiler of accumulated soot inside it is necessary not less than once a year.

And finally, one of the most serious disadvantages is that the fuel is enclosed entirely by hand. This should be done often. To maintain a comfortable temperature, you must put new wood every 3 hours. The case of these boilers is alphamaster – this is not a Russian stove, which is heated once a day. Engineers had to work a lot on making the unit work longer on one tab. This is a wood boiler long burning.

Principle of operation

There are several schemes of heating systems. Consider each separately. The differences in how the fuel is laid, and how ignited.

wood burning boilers

Stacking of the fuel column and ignition from the top

The longest Wood will burn if you set fire to the top. So, the fuel will burn in the direction from top to bottom. Wood-fired boilers, operating on this principle are called boilers upper combustion. The flame had quickly spread through the fuel, air is supplied only to the combustion zone. For this design, there are special telescopic duct.

About the way systems work with long firebox. But here fire wood not on top and side of the boiler. Such decisions are much rarer, as they have large dimensions.

The Pyrolysis of wood

This is another principle of a wood-burning boilers for home long burning. The peculiarity of this principle is that as fuel is used not the wood itself, and the gas obtained in the pyrolysis.

When heated to high temperatures and in conditions of limited access of air a long chain organic wood particles become short. As a result, flammable gases. In our case this so-called wood gas. Then through the nozzle it is supplied to the second chamber of the boiler, where it burns. The camera is air, and the gas is ignited. Such wood burning boilers are called pyrolysis.

for heating of private houses

Unit with automatic ignition system

This is another option popular boilers on the wood. Take an ordinary heat source is wood, and equipped with his nozzle with damper and automatically controlled fan. In the process of burning firewood, the fan sucks the combustion air. When they are sufficiently heated, the controller stops the supply of oxygen.

Open dampers will close under their own weight. As a result, the flame will go out. When the water in the system or antifreeze to cool to a certain temperature, automatic system rewill start the fan, it will again start to serve the air – fuel will ignite.

Restricting the air supply to the smouldering wood

This mode of operation of the wood boiler for home heating has many disadvantages. Combustion in this case is not fully – efficiency of the system is very low. In the process, generated a huge amount of soot from the chimney is black smoke. As the fuel burns not full, condensation forms – it is acrid and poisonous. While it is quite a lot.

But despite the drawbacks, wood burning boilers, operating on the basis of this principle (and it is a famous furnace ‘Buleria”), are widely used in the field. They are Autonomous and do not require electricity.

wood burning boiler

Features and features

Modern boilers burning wood can not only provide heating but can also heat water. There are two types of heat generators. Isolated two - and single-loop solutions.

Wood-fired Combi boiler for heating private houses is an additional heat exchanger. It's designed specifically for water heating. When the second circuit becomes active, the controller will give the hot coolant in the heating tube, a heater for the second circuit. This unit is a tankless heater. But the heat is not supplied to the heating system.

The single-circuit boiler is a system with the function of connection of boilers of indirect heating. The boiler – a holding tank with a coil inside. According to the latest circulates coolant before entering into the heating system. This option is more convenient for domestic use.

wood burning boilers long burning

Most Popular models

Many people think that among the producers of wood-burning boilers for heating of private houses leading European brands. In fact it is not. More popular are the Russian models. They are much cheaper and no less quality in comparison with European counterparts.

There are products of local producers “Prometheus”. The capacity of this equipment ranges from 10 to 50 kW. You can choose a model for heating small cottages or large houses. Case material made of steel. The boiler can operate not only on wood but also on coal.

Also popular Russian products "kmh". This multifuel equipment. It works fine on gas, diesel, wood and coal. Get it people who still are not sure what to spend heating.

There are a lot of European brands. So, Czech machine Buderus Logano occupy a worthy place on the market of heating equipment. The boiler is considered to be universal. It can work not only on wood but also on gas. This is a good option for those who have problems with the flow of gas. If it suddenly shuts off, the house and its inhabitants do not freeze.

Lithuanian products Stropuva used in homes with high ceilings. But do not think that the cauldron represents something formless. This graceful design that will fit into any interior. While burning wood is 80 hours. This is true, though it seems incredible. You need to consider that the boiler is sufficient clearance.

wood burning boilers in the house

How to pick up the unit?

To correctly choose a wood-burning boiler for a private home, you should know power. It is equal to the heat loss, which are characteristic of the heated space during the coldest periods of the year. This leak can be find out by using thermal calculations. They have taken into account the material from which the house is built, the temperature difference between inside and outside, the area of openings of Windows, orientation of buildings towards the cardinal.

These calculations it is possible to order the qualified engineers. But you can calculate it all yourself – as is indicated in the relevant building codes.

Very often recommended power – this is one kW for every 10 square meters. This is an approximate figure and it is relevant only for regions in Central Russia.

long burning boilers

The efficiency will be maximum only when the boiler is operated. So to save it is recommended to buy two units – one for the average temperature, and the second – a low-power. The latter will help the big pot in the cold winter and will also work in between seasons. Each unit will operate in nominal modes.

The Most important part of any boiler-the heat exchanger. Considered to be the most reliable cast iron products. They are not subject to corrosion and the lifetime is 20-25 years. Heat exchangers made of steel have a lower price, but the strength is less – the reason for this welds. Service life will not exceed 15 years.

The Feasibility of the installation

The Use of wood-fired boilers in the heating system would be appropriate when there is no possibility to connect gas or to use any other coolant. Firewood – a non-renewable source of energy. But if you have access to free raw materials in large quantitiesstill firewood requires an investment of time, effort and money. It is not always as profitable as it may seem.

However, if the boiler will be installed in the country, it is quite effective option. Country houses people often come for a while, and that means a lot of fuel is not necessary. If you want to heat a large room, then it is best to buy a multi-fuel solutions, or boiler long burning. These units will cost a bit more. But they are very versatile. In the absence of one type of fuel, you can always apply another. If you are using a conventional boiler on the wood this feature is not available.


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UK: https://tostpost.com/uk/domashn-y-zatishok/34444-drov-yaniy-kotel-dlya-opalennya-budinku.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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