Energy Savings from Sullairs VSD

Sullair Australia’s VSD latest line-up of compressors is now available from 18 to 90kW, and in the 55-90kW range can also be specified with additional Variable Output Control to provide even further turndown. The combination of the VSD and VOC technologies allows end users to achieve incredibly low flow ratios from a single machine.

According to Sullair Australia National Marketing Manager, Michael Knowles, the growing focus on energy efficiency in the marketplace means that VSD and VOC compressor technology has never been more important to industry. “Compressed air accounts for 10 percent of all electricity consumed by the manufacturing sector,” he explained. “Under the variable load conditions commonly experienced throughout industry, Sullair Australia’s VSD/VOC range is designed to deliver enhanced levels of compressed air efficiency.”

In practice, each compressor has a ‘sweet spot’ at which it operates at the highest efficiency. Typically for a VSD compressor, this will be from 30 to 70 percent of its load capacity, and for a VOC compressor it will be between 50 and 90 percent. Combining the VSD and VOC technologies effectively expands the ‘sweet spot’ from 30 to 90 percent of its load capacity, making it the ideal choice for applications where the load percentage might fluctuate widely during the normal course of operation.

VSD/VOC compressors are extremely efficient at the midpoint of demand, typically delivering a 30 percent saving in electricity at 50 percent load when compared with on/off load alternatives. “By matching a compressor installation to the end-user’s demand profile, air needs can often be met with less cost and more efficient systems,” said Knowles. “After auditing a customer’s compressed air needs and providing optimised solutions from Sullair’s broad range, end users have typically been able to save thousands of dollars per year and often achieve one-year paybacks for their investments.”

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