introduction to heating with biomass...• biomass is at some point decompose / combust and release...
TRANSCRIPT
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Introduction to Heating with
BIOMASSin the NWT
Renewables in Remote MicrogridsSeptember 15, 2015
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AGENDA• Introduction to AEA• What is biomass?• Why biomass?• Biomass heating options• Maintenance & Fuel Management• Example Installations• Questions, Discussion• Walking Tour
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INTRODUCTION TO AEAVision• “NWT Society will become a global
leader in clean, efficient, sustainable energy practice.”
Mission• "To promote and facilitate the
adoption of efficient, renewable and carbon neutral energy practices by all members of NWT society."
Background• not‐for‐profit, non governmental
organization, set up in 1997.#101 5102 51st Street, Yellowknife
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Mackenzie Delta ‐ Inuvik ‐ (867)777‐2068Sheena Adams
Sahtu ‐ Norman Wells– (867) 587‐3520Wayne Lennie
Dehcho ‐ Fort Simpson ‐ (867) 695‐2355Teresa Chilkowich
Tlicho ‐Whati ‐ (867) 573‐3030Sonny Zoe
Hay River – South Slave – (867) 874‐3434Tom Gross
Mackenzie Delta ‐ Inuvik ‐ (867)777‐2068Sheena Adams
Sahtu ‐ Norman Wells– (867) 587‐3520Wayne Lennie
Dehcho ‐ Fort Simpson ‐ (867) 695‐2355Teresa Chilkowich
Tlicho ‐Whati ‐ (867) 573‐3030Sonny Zoe
Hay River – South Slave – (867) 874‐3434Tom Gross
Regional Offices
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• Knowing how we use energy• Conservation e.g. turn down thermostat
• Energy Efficiency e.g. more insulation
• Renewable Energy e.g. biomass heating
AEA IS INVOLVED IN ACTIVITIES AIMED AT: aimed at:
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What is Biomass
• Wood• Pellets• Chips• Sawdust• Other
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WHY BIOMASS ?
o Renewable energyo Reduce fossil fuel dependencyo Cost savingso Local resource, local employmento Self sufficient, self reliant
community
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WHY BIOMASS ?
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11%
86%
3%
Urbania Annual Energy Consumption ‐760 GJ
Electricity Oil Wood Pellets
2%
98%
Urbania Building Greenhouse Gas Emissions ‐ 46 tCO2/Year
AEA OFFICE BEFORE PELLET BOILER
WHY BIOMASS ?
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BIOMASS ‐ A RENEWABLE ENERGY
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BIOMASS AND CARBON EMISSIONS• Biomass, under sustainable forest management practices is a renewable
resource• In Canada, between 1990 and 2008, managed boreal forest of Canada has
been a carbon sink (CFS)• Biomass is at some point decompose / combust and release CO2 (CH4, CO)
into the atmosphere• Canada’s forest and forest management are some of the best in the world
CO2 emissionsbiomass coal
Timeline of reaching carbon neutrality for biomass is extremely relevant and sensitive to many factors
• The atmosphere doesn’t care whether a molecule of carbon comes from a wood pellet or a lump of coal. It is still carbon dioxide CO2. And when we burn biomass, we are speeding up that CO2 dump to the atmosphere.
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Fossilized carbon versus biogenic carbon
From http://www.thecornerhouse.org.uk
Net increase in atmospheric carbon when fuel burned
No net increase in atmospheric carbon when fuel burned
Carbon Neutrality claim for biomassBiogenic carbon (non‐fossilized carbon) from the combustion of biomass is
re‐sequestered by living plant/tree material and does not add any additional carbon emissions into the biosphere
BIOMASS AND CARBON EMISSIONS
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BIOMASS HEATING OPTIONS
Space HeatingHeats a room
Central HeatingHeats whole building
District HeatingHeats more than one building
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BIOMASS HEATING OPTIONS ‐SPACE HEATING
Pellet Stove
Wood Stove
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BIOMASS HEATING OPTIONS ‐CENTRAL HEATING
RESIDENTIAL SCALE BOILERS
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BIOMASS HEATING OPTIONS ‐CENTRAL HEATING
RESIDENTIAL FURNACES
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BIOMASS HEATING OPTIONS ‐CENTRAL HEATING
COMMERCIAL SCALE BOILERS
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BIOMASS HEATING OPTIONSDISTRICT HEATING
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WOOD STOVES
• Traditional Heat Source• Still high use of wood stoves in NWT Communities
• Many people harvest their own wood
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WOOD STOVEADVANCES IN TECHNOLOGY
• Older ‘pot‐belly’ or oil drum stove
• No baffles• Low efficiency• high emissions (smoke)
• Then ‘air‐tight’ – a bit better (70’s)
• Newer Stoves• Catalytic & Re‐burn• High efficiency• low emissions (smoke)
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COMPARE OLD WITH NEW:
Overall Efficiency40 – 50% 60 – 80%+
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INSIDE A ‘NON‐CAT’ WOOD STOVE
1. Firebox insulation 2. A large baffle 3. Preheated combustion air
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INSIDE A CATALYTIC WOOD STOVE
Smoke passes through a catalytic honeycomb that lowers smoke burn temperature
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MAINTENANCE WOOD STOVERegular through burn season:o Remove asheso Clean chimneyAnnual:o Check gaskets, glass, door
hinges, brickso Check and replace catalytic
combustor
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FIREWOODGood fuel is the key to efficiencyONLY BURN DRY
(SEASONED) WOOD.
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PELLET STOVES• A clean burning option• Can operate up to 24 hours unattended
• Can be used with thermostat
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Pellet Stove Emissions
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PELLET STOVE CUTAWAY
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What Are Wood Pellets?
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Why Heat with Wood Pellets?
• Waste Product
• Cheaper than heating oil
• Better for the Environment than fossil fuels
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Cost Savings with Wood Pellets
Heating energy equivalent2 kg of pellets = 1 litre of oil = 1.5 litres of propane
1 bag of pellets ($5.15) = 9 litres of oil ($12)1 bag of pellets ($5.15) = 13 litres of propane ($11)
1 tonne of pellets ($350) = 500 litres of oil ($670)1 tonne of pellets ($350) = 725 litres of propane ($610)
Note: Prices May 2014, incl GST ‐ Heating oil $1.34, Propane $0.84
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Pellet Fuels Institute Specifications
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Pellet Specifications
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PELLET SPECIFICATIONS
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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Where do Wood Pellets Come From?
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18kg (40lb) bags
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Pallets of Bags
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Bulk Pellets – Delivered like Heating Oil or Propane
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Residential Bulk Pellet Storage
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1 Tonne (1000kg) bag & Hopper
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Loose Bulk Pellets by Truck
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Loose Bulk Pellets by Rail
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Pellet Transfer Augers
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‐Must keep pellets dry‐ Cover and do not store directly on the ground (or cement floor)‐Ravens!
WOOD PELLET STORAGE AND HANDLING
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Wood Pellets need to be kept dry!
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SAFETY
Smoke Detector
CarbonMonoxideDetector
FireExtinguisher
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MAINTENANCE – PELLET STOVERegular throughout the burn season:o Remove ash from the burn chamber and ash pan, o Scrape the burn pot, o Rake the ash from heat exchangers, air wash system,
venting and exhaust path Note: Pellet quality WILL affect maintenance. (size, ash, fines, crumbling)Annual or as requiredo Clean entire system after burning 1 ‐ 2 tons of fuelo Check glass, door hinges, gasket
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‐ 1/3 to max of $700‐ purchase outside of NWT 50%‐ 3 months from date of purchase‐ copy of receipt
REBATES WOOD and PELLET STOVES
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Residential‐ 1/3 to max of $5,000Business‐ 1/3 to max of $15,000Subject to funding availability
REBATES PELLET BOILERS
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DISTRICT HEATINGBENEFITS
o Cost effective – Shared capital and O&M costs
o Economy of scaleo Reduced maintenance ‐ one appliance
instead of manyo Safer – combustion is external to living
spaceo Access to funding
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DISTRICT HEATING PIPING
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DISTRICT HEATING CONNECTIONS
Forced (Hot) Air – Furnace• Add Heating Coil in duct• Fan Coil to replace furnace
Hydronic (Hot Water)– Boiler• Heat Exchanger
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FORCED AIR - FURNACE
Fan Coil – replaces Furnace
Heating Coil in duct – Keep Furnace
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HYDRONIC – BOILERHeat Exchanger installed in piping
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COMMERICAL BIOMASS BOILER -OPERATION AND MAINTENANCE
o Monitoringo Daily check ‐ can be remote
o Ash Removalo Smaller boilers – up to 1 hr biweeklyo Larger boilers – 1‐2hours weekly
o Cleaningo Heat Exchanger & Chimney – Monthly
o Who Does Maintenance?o Owner(s) or Contractor
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TETLIT GWICH’IN BIOMASS BOILER – FT MCPHERSON
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TETLIT GWICH’IN BIOMASS BOILER – FT MCPHERSON
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TETLIT GWICH’IN BIOMASS BOILER – FT MCPHERSON
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TLICHO INV. CORP.BEHCHOKO BIOMASS BOILER
• 540kW KOB Boiler• Heats 7 Buildings• Sell heat to GNWT
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YELLOWKNIVES DENEFIRST NATION
CHIEF DRYGEESE HALL, DETTAH
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KA’A'GEE TU FIRST NATIONS BIOMASS PROJECT - KAKISA
• 60kW Woodmaster Boiler• Local Wood & Pellets• Band Office & Hotel• Cost Estimate ~$135K• SPB ~2.5 Years
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• 1 MW KOB Pyrotec Boiler
• Services four schools
• Operational Savings of $160,000
• Simple Payback of 6 Years
HAY RIVER 4 SCHOOLS DISTRICT HEATING
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HAY RIVER 4 SCHOOLS DISTRICT HEATING
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Inukshuk Housing Co-op, YK
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City of YK –Pool, Arena Curling Club
• 740kW Binder Boiler• Savings ~$200K/yr• Simple Payback ~3 Years
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NPR Garden Townhomes, Bison Apartments
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BIOMASS COGENERATION
o aka Combined Heat and Power (CHP)o Produce both Electricity and Heat
o None in NWT yet…o Small scale (<1MW) – ready for
remote & harsh conditions?o System for Yellowknife in planning
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Biomass Co‐Generation• Heat • Power• Peak load‐ 7 MW• Annual load‐ 18,000 MWh
• Peak load‐ Approx 1.6 MW• Annual load‐ 9,000 MWh
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Heating
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THANK YOU!
QUESTIONS?