A crushing success for Teusner Wines

Based in one of Australia’s most well-known wine-producing regions, Teusner Wines has been making a variety of wines in the Barossa Valley for over 15 years. However, the heritage of the company’s wines far exceeds this, sourcing fruit from vineyards in the region that are up to 130 years old.

Everything is crushed one small picking bin at a time so that Teusner can keep a close eye on colour, flavour, aroma and structure, ensuring that the eminent flavours found in old Barossa vineyards take centre stage in the wines. Compressed air plays an important role in this process, powering up the pneumatic presses that are responsible for pressing the grapes. The pneumatic press is filled with grapes and, once the door has been closed, compressed air is used to inflate a sealed bag within the press, which effectively pushes the grapes against a large sieve that softly squeezes the remaining juice out.

To keep up with growing demand, Teusner recently developed a much larger purpose-built winery. This included sourcing two higher capacity pneumatic presses, which of course created a requirement for a larger capacity compressed air system.

With a typical harvest lasting only three months, the window to process the grapes is fairly short. It was therefore important to Teusner that it invested in a compressed air system that would be efficient, allowing the company to maximise the harvest period.

Having received a recommendation for the Kaeser compressor for this application, owner Kym Teusner contacted the local authorised Kaeser partner, Mobile Compressed Air (MCA), for a solution. After reviewing Teusner’s requirements, MCA recommended and subsequently installed two Kaeser SK 25 rotary screw compressors along with a 5000 L air receiver.

Filling the presses with the grapes is a labour-intensive process, so when a two-press system is in operation — as is the case at Teusner — they tend to run in separate sequences. This results in flatter air demand cycles. MCA was therefore able to recommend the installation of two 15 kW rotary screw compressors to meet the compressed air requirements rather than one larger unit, as the time between presses gives the two compressors time to refresh the air receiver, bringing it back up to pressure between the crushing cycles. For Teusner this meant cost savings, not only in terms of the initial capital investment cost, but also the longer term associated life cycle costs of running the compressed air system.

The SK series from Kaeser Compressors would also provide the efficiency that Teusner required, not only delivering more compressed air for less power consumption, but also combining ease of use and maintenance with versatility in an environmentally responsible design.

At the heart of every SK series rotary screw compressor lies a premium-quality screw compressor block featuring the Kaeser Sigma profile rotors. Efficiency is assured with flow-optimised rotors that are able to achieve power savings of up to 15% compared with conventional screw compressor block rotor profiles.

In addition, the SK series features a cooling system that uses a high-efficiency dual-flow fan and separate airflow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet. This not only achieves optimum cooling performance, low compressed air discharge temperatures and minimal sound levels, it also promotes efficient air compression.

The compressed air system at Teusner Wines has now been up and running for over a year.

“We have now had the Kaeser compressed air system in play for one harvest and it worked perfectly,” said Teusner. “We have been really happy with the quality of the machines and the level of support we received from Mobile Compressed Air.”