BURNING ISSUES
AAV tp
Drench valve
P HM 1 T SV
Safety Heat Exchanger
Drench water supply
Biomass Boiler
DC CS1
Biomass boiler pumpset
Back-end Valve
T1 MV1 Tr tp P T T T5 T HM 2
Biomass boilers will be key to thousands of projects meeting carbon targets so it is essential they are designed and specified correctly. Here are the most pertinent issues surrounding their safe and efficient design, according to four industry experts
System pressurisation & expansion
DC CS2 SV AAV Burner
Condensing boiler with modulating burner
DC T4
Fossil fuel boiler pumpset
Tr tp T5
4-port Thermal Store
Split Headers
P CS1 T Load
mixing valve
T3 MV3
There is absolutely no place for an architect to define the chimney height or boiler- house location without being supported by a fully trained professional engineer at the very earliest concept stage
D 22 CIBSE Journal December 2012
espite being a relatively immature industry in the UK, biomass has become one of the key low carbon technologies
expected to help the country achieve its tough 2020 carbon reduction targets. However, reports by building services experts and a Health and Safety Executive (HSE) Safety Notice1
suggest that a
major overhaul of training programmes is required if biomass boiler system installations are to be both safe and efficient. According to the Carbon Trust’s
report, Biomass Heat Accelerator: overview and summary of output2
, many large
construction projects – such as schools and housing developments – do not involve biomass specialists. Thus, the installation
of a biomass appliance is treated like a standard gas installation, incorporating the biomass boiler into a standard heating system. According to the Carbon Trust, this lack of knowledge of both correct system sizing and integration with fossil fuel back- up technologies, has led to installations that do not achieve expected cost and carbon savings. This lack of knowledge is compromising
safety too. Badly installed boilers and wrongly specified storage areas pose a risk of explosions due to build up of flue gases and build up of static electricity while filling containers. A badly designed wood pellet store could potentially cause carbon monoxide poisoning or farmer’s lung. CIBSE is now producing an
Application Manual on Biomass Heating
www.cibsejournal.com
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