Bioenergy is as much renewable energy such as solar, wind and water. Bioenergy can be seen as stored solar energy. Which convert a portion of the solar energy to biomass in the form of chemical compounds that can be used at a later time. Heating with solid biofuels is the environmental aspect is an excellent choice if you burn correctly. The fuel must be dry and burning should be carried out at high temperature and with the correct air supply. The burning of solid fuel will be no so-called net addition of carbon dioxide to the atmosphere. New forest grows up and store carbon dioxide at the same rate as the wood is felled and burnt.
In 2015 came 35% of Sweden's energy from biomass, which is the lighting and transport included. Today, Sweden is a fantastic example for other countries in the development of renewable energy can be achieved without economic and employment adversely affected.
About wood chip
The benefits of choosing wood as a fuel is that it can capture most of our forests, even that which can not be used for firewood or pellets. Wood chip is inexpensive to produce and are often produced locally. What is needed is a building for the storage of the chips and a tractor loader for loading the chip supply. If you do not have the opportunity to buy ready-chips option is to chip itself with a so-called chipper. Many forest owners and farmers start today provide chips, so it pays to search the immediate area for someone who sells finished chips.
The energy content of one cubic meter of wood is normally higher than in a cubic meter of loose wood, but may vary depending on the moisture content which should not exceed 30%. The lower the moisture content the better calorific value. Energy content of the chips is about 3.5-4.0 kWh / kg (about 150-250 kg / m3).
For those of you with a villa or small industrial building, we strongly recommend regular stamvedsflis of standard GF60 which is also known as "dry, fine wood chips" with a moisture content of 10-30%.
Dried and compressed wood fuels in the form of pellets have a high content of energy that we can advantageously be used for heating purposes. As an individual you can choose between three different kinds of heating systems; boiler, stove or additional burner. Pellets are also used in apartment buildings in heating plants or in remote or CHP.
Virtually all of the pellets produced in Sweden consists of by-products of the forestry industry in the form of sawdust. The raw material is compressed under high pressure to form small sticks of wood with stable high energy content. Pellets are a homogeneous fuel that is readily available for all types of facilities.
Heating with pellets is in comparison with heating by direct electricity and oil, long-term private economic good choice. The properties that are not connected to district heating, pellets are therefore an obvious choice for many. The money you save on energy efficiency and lower costs for heating can be on other things that we have more enjoyment. Pellets are a natural product that is part of the natural cycle and thus does not affect the climate as fossil fuels do. The pellets are delivered in sacks or bulk. With a bulk supply the deliveries throughout the year, but that the customer needs to put down a job. A good pellet ash removal system needs a few times per year, which in practice means emptying the ash container. The ash is in itself a fertilizer that can be used in the garden or on the lawn.
About log wood
There are just over 20st native tree species in Sweden. In addition to these, there are also a large number of introduced species that are mostly found in limited areas. Hardwood species are a much larger group than conifer species, which is only three in number. The species count as coniferous spruce, pine and larch.
The wood's moisture content is important to keep in mind when calculating the energy that the wood emits. Wood that has a moisture content of less than 30% gives in most cases the best performance and the least amount of emissions. Wood with higher moisture content than that should not be used unless the equipment is specifically designed for these more humid fuels. A living tree, as well as waste products from sawmills, has a moisture content of about 50-60%.
An important factor in the drying of wood is humidity. It is lowest in the period before leafing and then rises gradually to fall. When the difference between the wood and the humidity is highest dry the wood effectively. Thus, the drying of the wood is often better in April at 10 ° C than at 25 ° C in August. The moisture content of coarse speech when it comes to raw wood, is about 50%, and air dry wood is 15% in May and 30% in October-November.
Something to think about when it has earned the wood is to make sure that the stocked well ventilate the roof. A good option is looking for a metal roof resting on joists. Something that is not to recommend is to use the tarpaulin. If this is after all only option, remember not to take the long way down the sides.