Generally the most expensive option in terms of initial investment, VSD air compressors are also highly efficient. Since energy costs make up to 80% of operating any air compressor, they usually pay for themselves. In fact, you can save up to 60% with the latest generation VSD models compared to fixed speed compressors. These energy savings quickly add up to (tens of) thousands dollars per year.
If your facility has a fluctuating air demand, VSD machines are the best choice. This point is especially true if your facility operates multiple shifts during the day, where air flow increases and decreases. VSD engines match output to the required demand.
In simpler terms, the compressor senses how much flow is being used and adjusts its motor speed accordingly - allowing for the necessary output. On slower production days, VSD technology is especially handy. It eliminates wasted electricity from not constantly running at maximum capacity.
It's also worth mentioning that many VSD compressors come with advanced monitoring and control tools to optimize performance. These optional features can collect data and analytics to determine the best operating conditions for your application(s). They also help prevent downtime and save on unnecessary maintenance costs.
VSD air compressors are becoming the norm, rather than the exception. Many customers find the annual energy savings allows them to reinvest money elsewhere.
Of course, if VSD compressors are too costly, there are other options to match your budget. Rotary screw compressors come in a wide range of sizes, and designs. If you know your air demand needs are absolutely stable, you may want to consider a fixed speed compressor.