biomass boiler heating burn wood pellets chips or logs

 Biomass Heating Boiler Technology … What we do …

Reasons to invest in Biomass heating with Hafod Renewable Energy

  • Proven track record with the skills and expertise to undertake any project.
  • Vast experience in Pellet, wood chip and log boilers
  • Competitive annual maintenance package for peace of mind
  • Use of quality manufacturers equipment with a minimum 7 year guarantee.

Advantages over oil

  • Reduce your reliance on fossil fuels (by using a sustainable , stable fuel)
  • Low carbon heating system achieves a good energy rating for the dwelling and gains good points for Part L of the building regulations
  • Government backed renewable heat incentive is available

How it works

Biomass boiler heating systems burn wood pellets, chips or logs to provide you warmth in a single room or to power your central heating and hot water cylinders.

Biomass boiler heating operates the same as a gas, oil or LPG boiler.  They all use combustion.  Combustion is the simplest method where biomass can be used for energy.

Biomass boiler heating can look similar in appearance to an oil boiler.  They are similar size, they both need a flue and a method for fuel delivery; oil boilers have an oil pipe (line) for their fuel delivery whereas a biomass boiler may have an auger.

Useful links:

 

biomass boiler heating diagram

Is it renewable energy?

The vital difference between biomass boiler heating and fossil fuels is one of time scale.

Biomass removes carbon from the atmosphere while plants are growing and returns it when burned.  When biomass is grown on a sustainable basis, biomass is harvested and replanted.. This is part of forest management or coppicing or as part of a continuous programme of replanting with the new growth taking up CO2 from the atmosphere at the same time as it is released by combustion of the previous harvest.

This maintains a closed carbon cycle with no net increase in atmospheric CO2 levels.

biomass boiler heating carbon cycle

Technology Types

Biomass boiler heating hand fill option

Biomass boilers are an ‘all In one solution’. The boilers have an integrated hopper or external hopper. Bolted onto the side may be an auger that feeds the biomass heating boiler.  Outputs of biomass boilers range from 4-60kw.

This type of system requires the user to fill the boiler with bags of pellets (15kg) typically every 2 -3 days.  This system is the generally the most cost effective systems and requires little internal space.

Automatic fed systems

Fully automatic biomass boiler heating include fuel delivery to the boiler from an seperate store. The system consists of a biomass boiler and a bulk storage (silo) of pellets.  Pellets are blown from the silo to the boiler via pipes.   The distance between the silo and biomas heating boiler can be up to 15 meters. The boiler can be in the house and the silo in an outbuilding or external to the house.

The silo can hold up to 9 tonnes of pellets which is equivalent to approximately 4500 litres of oil so in some cases a fuel delivery of only once a year is required.

Fuel is delivered via specialist biomass vehicles and they use vacuum pipes to blow the fuel into your silo.

biomass boiler heating typical hopper

Wood chip boilers

Generally for larger properties Wood chip provides a lower cost to pellets and have the flexibility that you can produce your own fuel* (*if you have access to woodland and a chipper, moisture must be approx. 30% and drying times for the chip is usually >1 year.)

Fuel

Woodchip is derived from sawmill residues, forestry roundwood or tree surgery residues.  This wood is then put through a chipping operation with large wood chippers to process material to the required size.  Wood chips typically are 20-50 mm long.

Boiler

  • This solution requires more space than a pellet boiler and they are not available as a hand fill.
  • This system generally goes in an outbuilding or large garage.  The boiler is fed by an auger fuel delivery.
  • The woodchip store is generally 3m x 3m.  This is usually crafted on site by our specialist joiner.
biomass boiler heating large house installation

Log Gasification boilers

Generally suited for people who have readily available access to their own logs.

Fuel

Log boilers are fuelled with logs and larger pieces of wood, including joinery offcuts. Wood is manually loaded into the appliance, making them suitable for houses or small commercial applications where labour is available.

Firewood must be seasoned before use, usually before supply for 1-2 years.

Boiler

Log boilers are batch fed devices and simple to operate, but they require a large water storage cylinder to capture the heat produced and a managed wood store.

The boilers operate at up to 92% efficiency.  This is through gasification of the wood.  Using the latest downdraft technology, the gasification boiler burns all the gasses produced during the normal burning process, therefore allowing minimal CO2 to be released into the atmosphere. The secondary burning chamber burns gasses at up to 1200 degrees centigrade.

Log Boilers have a large log chamber which holds enough wood for up to 12 hours burning.  They can take logs from 500mm to 1000mm long and 6″ to 10″ diameter depending on the size of boiler.

The Log boiler heats up a water heat store.  A typical set up consists of a 40Kw boiler connected to a 2000 litre store.  This store is 1.4 metres in diameter so space required for the plant is typically a minimum of 3m x 3m

Reasons to invest in Biomass heating with Hafod Renewable Energy

  • Proven track record with the skills and expertise to undertake any project.
  • Vast experience in Pellet, wood chip and log boilers
  • Competitive annual maintenance package for peace of mind
  • Use of quality manufacturers equipment with a minimum 7 year guarantee.

Advantages over oil

  • Reduce your reliance on fossil fuels (by using a sustainable , stable fuel)
  • Low carbon heating system achieves a good energy rating for the dwelling and gains good points for Part L of the building regulations
  • Government backed renewable heat incentive is available
Biomass heating system

Biomass Case Study