What Is Specific Power and Why Is It Important in Screw Compressors?
If you only compare motor kW, you can buy the wrong screw compressor. The number that matters for energy cost is screw compressor specific power: the input power required to produce one cubic meter of compressed air per minute. The Formula...
What Is IE4 Efficiency and Why Does It Matter for Screw Compressors?
In a screw air compressor, the motor accounts for most of the machine’s lifetime electricity use. IE4 screw air compressor motor efficiency means less input power becomes heat and more becomes useful compressed air, which directly lowers the cost per cubic...
How Much Energy Can a VSD Screw Compressor Save?
VSD screw compressor energy savings are not a fixed percentage. They depend on load profile, pressure, motor efficiency, and the old machine’s unload losses. In a real fixed-speed replacement example, a 250 kW machine was replaced with a 160 kW variable...
What Is a Variable Speed Drive Screw Compressor and How Does It Work?
A fixed-speed screw compressor that cycles between load and unload can burn up to 40% of full-load power while producing no air. That waste is the main reason plant managers switch to a variable speed drive screw compressor. What a Variable...
