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Case studies

  • Case studies
    30 July 2009

    Dairy farmers and technical experts share their experiences across four demonstration projects using a variety of solar water heating and waste heat recovery systems to reduce energy costs in the dairy shed.

  • Case studies
    26 August 2009

    Small wind turbines can generate electricity for use on the farm, business and home. Wind turbines can co-exist easily with other farming practices, and have been used for decades on European farms. There is a wide range of turbines suitable for use in New Zealand, ranging from micro-scale to larger commercial-scale systems. This guide to wind power schemes is aimed at a farming audience, and includes practical examples.

  • Case studies
    27 August 2009

    You can talk the talk, but what do you actually do to manage energy better?

    ASB Bank has found a path that rewarded it with energy savings of nearly $200,000 in 2008, one step towards a targeted $1m annual saving.

    This case study looks at how this dynamic organisation has made energy efficiency integral to its business.
    ASB has taken a measured approach, following a cycle of ‘plan, do, review and learn'.

  • Case studies
    27 August 2009

    The University of Auckland now uses 41% less energy per student than it did in 1981, thanks to careful energy management. The university has achieved the reduction by continually monitoring its energy use, and using the results to identify and introduce targeted energy-efficiency measures.

    Those measures include large-scale projects, such as upgrading the heating system, as well as low-cost initiatives such as introducing automated computer shutdowns. They are estimated to have saved the university more than $100 million since 1981 (based on 2008 energy rates).

  • Case studies
    27 August 2009

    Crowne Plaza Christchurch's utility spend is a significant overhead. The driver behind an energy review was a desire to reduce utility costs - without compromising guests' comfort.

    An energy audit uncovered ways to cut consumption and also kick-started a change in thinking. "It became part of our everyday business," explains chief engineer Chris Stevens.

    The hotel's annual electricity bill is $100,000 less now than in 2006 - a 14% saving. It also achieved a peak annual saving of 14% in potable water and trade waste, and 12% in LPG consumption.

  • Case studies
    29 September 2009

    This case study features a solar water heating installation at Solscape, an eco retreat near Raglan. Hot water is what tourists expect from the moment they unpack their suitcase and Solscape are using the sun's rays to solve this.

  • Case studies
    1 April 2005

    An energy efficient all-in-one system that integrates air
    conditioning, freezer and coolroom control and water heating in a compact rooftop shed evolved from a partnership between a fast food chain, an air conditioning company and an energy efficiency company.

  • Case studies
    27 October 2009

    At Kopua Holiday Park in Raglan they can't always guarantee that the surf is up, but they can offer the sun on tap. That's because they've installed a large scale solar water heating system on their main kitchen and ablution block that delivers plenty of hot water when it's needed.

  • Case studies
    12 November 2009

    By reducing their electricity needs and installing two small wind turbines, owners of this Canterbury tourist lodge have eliminated their power bill - and they're getting paid for the excess electricity they generate.

  • Case studies
    1 March 2009

    This farm installed a heat exchange system - it extracts the heat from the waste water and uses it to pre-warm the incoming water in the dairy shed. It reduces energy use as less energy is needed to heat each new batch of water to the 85 degrees celsius required for the next wash.

    Monitoring has shown that the system is on target to achieve an annual energy saving of 30%. That equates to a cut in CO2 emissions of about one tonne a year.

     

     

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