Case studies

  • Gasification momentum builds in New Zealand - case study
    Case studies
    29 June 2009

    After a long period on the sidelines, gasification is attracting new interest.

    For businesses with ready access to a good source of wood fuel - and increasingly other forms of biomass - it could be a very attractive way of producing low-cost and low-emission heat and electricity. This article overviews the technology and shares the experience of the ‘advance guard' driving this technology forward in New Zealand.

     

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  • Cashmere High School heats with clean, green wood energy
    Case studies
    19 June 2009

    In May 2008 Cashmere High School switched from coal to renewable wood energy to heat its site.

    The new boilers produce around five times less particulate emissions than a typical school coal boiler. Carbon emissions have reduced by 216 tonnes per year. The wood-fired system is also 14% more efficient.

    "There used to be soot and ash in the gutters. Now we just have clean, clean emissions," says Cashmere High support services manager Roger O'Regan.

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  • Southern Pine turns by-product into fuel
    Case studies
    19 June 2009

    Waste was one of the first considerations for Southern Pine Products when it started manufacturing MDF (medium density fibreboard) products.

    The company opted to install a briquette press, which turns MDF dust into combustible briquettes for boiler fuel.

    Moffatts Flower Company, a greenhouse complex only 5 km from Southern Pine, now buys all the briquettes the company produces.

    The saving in Southern Pine's waste disposal costs is projected to be $180,000 a year and annual revenue from briquettes is projected to be around $25,000.

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  • Wood pellets makes warm welcome economical for Titoki Healing Centre
    Case studies
    19 June 2009

    A 50kW wood pellet-fired boiler is proving considerably cheaper than electricity for heating the Bay of Plenty‘s 30 bed Titoki Healing Centre.

    Fully automated and fed by a 3-tonne hopper topped up by the truckload, the system operates virtually hands-free.

    Installation cost around $80,000. That compared more than favourably to the other main option, heat pumps, at around $90,000. Running costs are even more competitive at about $4,400 annually, almost a third of the costs estimated for running heat pumps.

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