Jakarta Capital Environmental Blog, Crown Eco Management: Biomass Boiler Addresses Alaskans' Environmental, Economic Concerns - PowerPoint PPT Presentation

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Jakarta Capital Environmental Blog, Crown Eco Management: Biomass Boiler Addresses Alaskans' Environmental, Economic Concerns

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JakartaCapital Environmental Blog, Crown Eco Management- The heavilyforested city of Ketchikan, Alaska, is built on rock and surrounded by water.Every commodity that comes into Ketchikan must arrive by sea or air. The use offuel oil is problematic for both economic and environmental reasons because theoil must be obtained and refined elsewhere and transported (using additionalfuel). What's more, fuel oil is subject to price instability. – PowerPoint PPT presentation

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Title: Jakarta Capital Environmental Blog, Crown Eco Management: Biomass Boiler Addresses Alaskans' Environmental, Economic Concerns


1
Jakarta Capital Environmental Blog, Crown Eco
Management
  • Biomass Boiler Addresses Alaskans' Environmental,
    Economic Concerns

2
  • The heavily forested city of Ketchikan, Alaska,
    is built on rock and surrounded by water. Every
    commodity that comes into Ketchikan must arrive
    by sea or air. The use of fuel oil is problematic
    for both economic and environmental reasons
    because the oil must be obtained and refined
    elsewhere and transported (using additional
    fuel). What's more, fuel oil is subject to price
    instability.
  •  
  • Southeast Alaska Discovery Center in Ketchikan,
    which provides information to more than a million
    visitors each year, is the site of a pilot
    biomass boiler system now coming to life. Two
    oil-fired boilers serving the 250,000-sq-ft
    center were replaced with a highly efficient
    system fueled by local wood. Manufactured by
    Hurst Boiler Welding Company Inc., the
    hot-water boiler was custom-designed to fit
    within very limited indoor space.
  •  
  • Under the direction of E. Dane Ash, project
    manager for Tyonek-Alcan Pacific LLC, the biomass
    boiler system was developed with Hurst
    representative Gregory W. Smith of Global Energy
    Solutions Inc. to address environmental concerns,
    as well as issues related to building space, fuel
    costs, comfort, reliability, and simplicity of
    operation.
  •  

3
  • The new boiler is located on the lower level of
    the Discovery Center, which requires heating for
    a minimum of nine months a year. Local wood
    densified into fuel pucks is delivered to an
    elevated walking-floor storage bin in a vestibule
    area built to protect against excessive moisture.
    (The biomass-fired boiler can burn any wood
    product with up to 50-percent moisture content.)
    An auger moves pucks from the storage area to a
    metering bin and into the boiler. Freezing is not
    an issue because the walking floor easily breaks
    up any frozen contents.
  •  
  • The boiler system was designed to highlight how
    biomass can reduce or eliminate the use of fossil
    fuels. Visitors can see the boiler operate
    through specially designed windows. In the hall
    just outside of the boiler room, the noise level
    and ambient temperature is consistent with the
    rest of the building.

4
  • Savings
  •  
  • Fuel costs have been cut by two-thirds. The
    densified pucks are used with almost no residual
    ash eventually, however, tree clippings from the
    Ketchikan walking trails will be ground and fed
    into the boiler, eliminating the need for
    transport to a landfill, burning, and other
    methods of disposal.
  •  
  • The Boiler
  •  
  • The Hurst S100 Series Fire Tube 27 HP Hydronic
    Water Heating Boiler features a pre-heater to
    optimize combustion and an underfeed stoker with
    dry-ash-removal system.
  •  
  • Results
  •  
  • The system easily can be replicated for heat or
    heat/power generation up to 20,000 kw. In June
    2011, Smith served as a keynote speaker for the
    fifth annual Native American Economic Development
    Conference in Anaheim, Calif., where he described
    the initiatives being implemented in Ketchikan
    and shared success stories of biomass-fired
    boiler systems installed on institutional
    campuses and in manufacturing facilities
    throughout the United States, particularly in
    challenging and remote locations. Systems include
    municipal solid waste, as well as woody biomass
    for steam production and steam to power.
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