Best Practice Energy Case Studies

Energy audits conducted by the Plastics New Zealand Best Practice Energy Programme identify common examples of energy efficiency gains for plastics manufacturers. We have collated these examples of best practice into highly practical case studies.

These case studies are designed to stimulate plant engineers and managers to think about the way they operate and the equipment they use. The case studies provide real examples of ways in which plastics manufacturers have saved money by optimising systems and changing technology.


Download PDF case studies below

Energy Efficiency For Pumps Energy Efficiency For Pumps
Pumps can account for up to 10% of a plastics plant energy use
Implementing Energy Efficiency Implementing Energy Efficiency
Since having an energy audit in 2009, Hamilton injection moulding company Millennium Plastics, have shaved 15% off their annual electricity costs by implementing energy efficiency initiatives.
Compressed Air Compressed Air
Compressed air uses up to 40% of the electricity in a plastic factory, yet it only delivers 10-15% of the energy it uses.
Energy Efficient Water Cooling Energy Efficient Water Cooling
Reliable and consistent cooling water is essential for the efficient manufacture of plastics. Energy is needed to reduce water temperature to the required level using cooling or chilling plant, often consuming up to 10% of the total energy used in a plastics manufacturing site. This energy use can often be reduced with some simple measures.
What's Involved in an Energy Audit? What's Involved in an Energy Audit?
Energy audits conducted through the Plastics New Zealand Best Practice energy Programme have identified savings of between 10 - 20% of participating company’s energy spend. Many of these savings required little or no capital investment to start saving money.