An audit of a Mundubbera Citrus farm recommended fitting variable speed drives to pumps, and a 30kW solar PV system. The farmer has implemented the findings, reducing the pump size as well, and adding over 80kW of Solar PV to save over $41,000 per year in electricity costs.
A Cairns Cold Storage business cut their electricity usage by 30% by upgrading plant and equipment such as efficient chillers and pumps, variable speed drives and smart controls.
See How Lower Burdekin Water Board cut their power consumption by 58,000kWh and demand by 105kVA resulting in annual cost savings of $20,000 or 25% at the Kilrie Gully pump station.
See how Gold Coast Tiger Prawns saved $40,000 per year in demand charges by fitting Variable Speed Drives to main pumps and the conveyors in the processing plant – as well as Power Factor Correction.
An energy audit for the on-site electricity usage recommended the installation of variable speed controls on pumps, replacement pumps with more energy efficient drive units, hot water system replacement, lighting replacement, air conditioning upgrade options & installation of solar photovoltaic system.
The irrigation audit identified energy savings of 29% and a payback period of 1.3 years with a change to pump operations, installation of a variable speed drive to a 75kW pump and replacing the pump impellor with a full-size version. The audit also found up to $3,500 in savings available with a change in tariff.
The irrigation energy audit recommended adding variable speed drives to two dam pumps as they have varying duties in supplying centre pivot irrigators. The audit also recommended upgrading 100mm steel main pipe for transfer pumping to 125mm plastic. These initiatives would result in energy savings of over $41,000 per year and a payback period of around 1.5 years.
The irrigation audit identified energy savings of 10% with a payback of 3.4 years by modifying the discharge piping on the 45kW pump to reduce pressure losses. Additional savings were identified by replacing pumps and adding a variable speed controlled, but with longer payback periods.
The irrigation energy audit identified a number of initiative that would save over $110,000 over 10 years. These included replacing oversized pumps, and adding Variable Speed Drives where the changing elevation of the Centre Pivots caused variable head pressure. The audit also identified $600 in annual savings through tariff review.