Case studies

Viscount Plastics upgraded their cooling water system after an energy audit identified where savings could be achieved.

The company uses chilled and cooled water to cool its injection moulding machines before extracting the heat via cooling towers before using it again. It also uses the water to cool plastic products during production.

The upgrade reduced energy use at the factory by at least 324,848 kWh a year - a saving of about $38,000.

The Mt Maunganui-based facility has installed a dual-fuel boiler that has reduced natural gas usage by utilising waste products from their factory. Now they are burning all their waste vegetable oils and tallow. The new boiler reduces their CO2 emissions by 1,378 tonnes per year.

New technology is turning sludge from waste water into valuable bio-fuel with environmental and financial benefits for a Southland meat processing plant.

It's a bubbling fluidised bed boiler, well-proven overseas for its ability to handle low quality fuels. The 8.5MW unit was installed at Silver Fern Farms' Finegand plant by Energy For Industry under a build, own, operate agreement.