Demand side management

  • Tatua dairy and food processes case study
    Research and reports
    12 November 2007

    The rising cost of natural gas prompted Tatua Co-operative Dairy Factory near Hamilton to look at alternative energy sources to run its boilers.
    Wood-fired boilers are common in sawmills and wood processing plants, but are yet to be used in a New Zealand dairy factory. Tatua's site engineer Jack van Lankveld says they were motivated by a desire to be more self-sufficient and environmentally friendly.
    "If the [gas] supply went down we would have to stop operating. There's also the whole carbon issue to think about - this is something that is becoming increasingly important."

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  • Sawmill energy audit summary
    Research and reports
    20 April 2005

    This study of nine sawmills located from the central North Island to Southland is based on Level 2 energy audits carried out between 2001 and 2004. It is an assessment made of the scale of energy use by the sawmilling industry and the potential for energy savings.

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  • Guidelines for payment of wood fuel by energy content
    Guidelines
    23 August 2010

    Wood used for energy does not fit well with a payment system that works using non-energy (eg. volume or weight). The energy content of wood is closely related to moisture content, and this can vary substantially, depending on the origin and storage history of the material. This study looks to determine the effects of moving from a weight-based payment system to a specific energy-content-based payment system at a large industrial site, using woody biomass as a fuel source on a large scale.

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